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 docs/superpowers/
 .superpowers/
 
+.jam/
diff --git a/docs/plans/2026-03-18-jam-intel-implementation.md b/docs/plans/2026-03-18-jam-intel-implementation.md
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+# jam intel — Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Build a codebase intelligence feature (`jam intel`) that scans repos, builds a semantic knowledge graph, generates architecture diagrams, and supports natural language queries — all from the CLI.
+
+**Architecture:** Pluggable language analyzers feed a knowledge graph (in-memory graph + JSON persistence). A scanner orchestrates analysis, a Mermaid generator produces diagrams, an LLM enrichment engine adds semantic metadata progressively, and a query engine handles NL queries via tool-use pattern. Six CLI subcommands expose everything.
+
+**Tech Stack:** TypeScript (ESM), vitest, zod, commander, chalk. No new dependencies for core — graph is hand-rolled, Mermaid is text generation.
+
+**Spec:** `docs/specs/2026-03-18-jam-intel-design.md`
+
+---
+
+## Important Implementation Notes
+
+- **ESM imports:** All imports must use `.js` extension (e.g., `import { X } from './types.js'`)
+- **Verify compilation:** Always use `npx tsc --noEmit` (no file args) — individual file args bypass tsconfig
+- **Lazy imports:** All command action handlers must use `await import(...)` pattern for fast CLI startup
+- **Git in tests:** Use `execSync('git init', { cwd: workspace })` not `mkdir('.git')` — `git ls-files` needs a real repo
+- **chatWithTools fallback:** The `chatWithTools` method is optional on `ProviderAdapter`. Always check `provider.chatWithTools != null` and fall back to offline keyword mode if unavailable.
+
+---
+
+## File Structure
+
+```
+src/intel/
+├── index.ts              # Barrel export for public API
+├── types.ts              # Node, Edge, KnowledgeGraph, SemanticMetadata types
+├── graph.ts              # IntelGraph class — in-memory graph with traversal, query, serialization
+├── graph.test.ts         # Graph unit tests
+├── scanner.ts            # Scanner — orchestrates analyzers, builds graph, detects frameworks
+├── scanner.test.ts       # Scanner integration tests with fixture repos
+├── storage.ts            # Load/save graph.json + enrichment.json, .lock
+├── storage.test.ts       # Storage unit tests
+├── mermaid.ts            # Mermaid diagram generators (architecture, flow, deps, impact, query result)
+├── mermaid.test.ts       # Mermaid output tests
+├── enrichment.ts         # LLM enrichment engine — priority queue, budget, progressive
+├── enrichment.test.ts    # Enrichment tests (mocked LLM)
+├── query.ts              # Query engine — NL via tool-use, offline keyword mode
+├── query.test.ts         # Query tests
+├── viewer.ts             # Static HTML generator for Mermaid viewer (auto-reload)
+├── analyzers/
+│   ├── base.ts           # AnalyzerPlugin interface, AnalyzerRegistry
+│   ├── typescript.ts     # TS/JS analyzer (extends existing src/analyzers/)
+│   ├── typescript.test.ts
+│   ├── python.ts         # Python analyzer (regex-based)
+│   ├── python.test.ts
+│   ├── cobol.ts          # COBOL analyzer (regex-based)
+│   ├── cobol.test.ts
+│   ├── sql.ts            # SQL migration/schema analyzer
+│   ├── sql.test.ts
+│   ├── docker.ts         # Docker/docker-compose analyzer
+│   ├── docker.test.ts
+│   ├── openapi.ts        # OpenAPI/Swagger analyzer
+│   ├── openapi.test.ts
+│   └── registry.ts       # Default analyzer registry setup
+├── frameworks/
+│   ├── detector.ts       # Framework detection from file markers
+│   ├── detector.test.ts
+│   ├── profiles.ts       # Framework profile definitions (Express, dbt, Airflow, etc.)
+│   └── profiles.test.ts
+src/commands/
+│   └── intel.ts          # CLI command: jam intel scan|query|impact|explore|diagram|status
+src/config/
+│   └── schema.ts         # (modify) Add IntelConfigSchema
+```
+
+---
+
+### Task 1: Knowledge Graph Types
+
+**Files:**
+- Create: `src/intel/types.ts`
+
+- [ ] **Step 1: Write the types file**
+
+```typescript
+// src/intel/types.ts
+
+export type NodeType =
+  | 'repo' | 'service' | 'module' | 'file'
+  | 'class' | 'function' | 'endpoint'
+  | 'table' | 'schema' | 'queue' | 'event'
+  | 'config' | 'external';
+
+export type EdgeType =
+  | 'imports' | 'calls'
+  | 'reads' | 'writes'
+  | 'publishes' | 'subscribes'
+  | 'exposes' | 'consumes'
+  | 'contains' | 'configures'
+  | 'deploys-with' | 'depends-on';
+
+export type EnrichDepth = 'shallow' | 'deep' | 'none';
+
+export interface IntelNode {
+  id: string;
+  type: NodeType;
+  name: string;
+  filePath?: string;
+  line?: number;
+  language?: string;
+  framework?: string;
+  metadata: Record<string, unknown>;
+}
+
+export interface IntelEdge {
+  source: string;
+  target: string;
+  type: EdgeType;
+  metadata?: Record<string, unknown>;
+}
+
+export interface SemanticMetadata {
+  nodeId: string;
+  purpose?: string;
+  pattern?: string;
+  domain?: string;
+  risk?: 'low' | 'medium' | 'high';
+  summary?: string;
+  semanticEdges?: Array<{ target: string; type: EdgeType; reason: string }>;
+  enrichedAt?: string;
+  depth: EnrichDepth;
+}
+
+export interface SerializedGraph {
+  version: 1;
+  scannedAt: string;
+  rootDir: string;
+  nodeCount: number;
+  edgeCount: number;
+  nodes: IntelNode[];
+  edges: IntelEdge[];
+  frameworks: string[];
+  languages: string[];
+  mtimes: Record<string, number>;
+}
+
+export interface SerializedEnrichment {
+  version: 1;
+  enrichedAt: string;
+  depth: EnrichDepth;
+  tokensUsed: number;
+  entries: SemanticMetadata[];
+}
+
+export interface IntelStats {
+  nodeCount: number;
+  edgeCount: number;
+  fileCount: number;
+  languages: string[];
+  frameworks: string[];
+  enrichmentProgress: number;
+  tokensUsed: number;
+  lastScannedAt?: string;
+}
+```
+
+- [ ] **Step 2: Verify compilation**
+
+Run: `npx tsc --noEmit`
+Expected: No errors
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add src/intel/types.ts
+git commit -m "feat(intel): add knowledge graph type definitions"
+```
+
+---
+
+### Task 2: IntelGraph Class
+
+**Files:**
+- Create: `src/intel/graph.ts`
+- Create: `src/intel/graph.test.ts`
+
+- [ ] **Step 1: Write failing tests**
+
+Test cases (see spec for full test code):
+- `adds and retrieves nodes` — verify nodeCount and getNode
+- `adds and retrieves edges` — verify edgeCount
+- `returns null for missing node`
+- `finds neighbors (outgoing)` — verify directional traversal
+- `finds neighbors (incoming)` — verify reverse traversal
+- `filters nodes by type`
+- `traverses paths between nodes` — BFS shortest path
+- `returns null for no path`
+- `finds impact subgraph` — all nodes reachable via incoming edges (reverse BFS)
+- `serializes and deserializes` — roundtrip preserves nodes/edges
+- `keyword search matches node names`
+- `computes stats`
+- `removes a node and its edges`
+
+- [ ] **Step 2: Run tests to verify they fail**
+
+Run: `npx vitest run src/intel/graph.test.ts`
+Expected: FAIL — module not found
+
+- [ ] **Step 3: Implement IntelGraph**
+
+Key methods:
+- `addNode(node)`, `getNode(id)`, `removeNode(id)`
+- `addEdge(edge)`, `getEdgesFrom(nodeId)`, `getEdgesTo(nodeId)`
+- `getNeighbors(nodeId, direction)` — outgoing/incoming/both
+- `filterByType(type)` — returns matching nodes
+- `findPath(fromId, toId)` — BFS shortest path
+- `getImpactSubgraph(nodeId)` — reverse BFS (all nodes that depend on this)
+- `search(keyword)` — case-insensitive match on name and filePath
+- `serialize(rootDir)` / `static deserialize(data)` — JSON roundtrip
+- `getStats()` — aggregate statistics
+- `estimateTokens(depth)` — returns estimated token count based on node count × tokens-per-node for `--dry-run`
+
+Internal: adjacency lists via `Map<string, Set<number>>` for outgoing/incoming edge indices.
+
+- [ ] **Step 4: Run tests to verify they pass**
+
+Run: `npx vitest run src/intel/graph.test.ts`
+Expected: All 13 tests PASS
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/intel/graph.ts src/intel/graph.test.ts
+git commit -m "feat(intel): add IntelGraph class with traversal, search, serialization"
+```
+
+---
+
+### Task 3: Analyzer Plugin Interface + Registry
+
+**Files:**
+- Create: `src/intel/analyzers/base.ts`
+- Create: `src/intel/analyzers/registry.ts`
+
+- [ ] **Step 1: Write the analyzer interface**
+
+```typescript
+// src/intel/analyzers/base.ts
+import type { IntelNode, IntelEdge } from '../types.js';
+
+export interface FileAnalysis {
+  nodes: IntelNode[];
+  edges: IntelEdge[];
+}
+
+export interface ProjectAnalysisResult {
+  nodes: IntelNode[];
+  edges: IntelEdge[];
+  frameworks: string[];
+}
+
+export interface AnalyzerPlugin {
+  name: string;
+  languages: string[];
+  extensions: string[];
+  /** Exact filenames to match (e.g., 'Dockerfile', 'docker-compose.yml') */
+  filenames?: string[];
+  /** Analyze a single file. rootDir provided for import resolution. */
+  analyzeFile(content: string, relPath: string, rootDir: string): FileAnalysis;
+  /** Optional: cross-file analysis after all files scanned */
+  analyzeProject?(allNodes: IntelNode[], allEdges: IntelEdge[], rootDir: string): ProjectAnalysisResult;
+}
+```
+
+- [ ] **Step 2: Write the registry with filename + extension matching**
+
+```typescript
+// src/intel/analyzers/registry.ts
+import { basename } from 'node:path';
+import type { AnalyzerPlugin } from './base.js';
+
+export class AnalyzerRegistry {
+  private plugins: AnalyzerPlugin[] = [];
+  private extMap = new Map<string, AnalyzerPlugin>();
+  private filenameMap = new Map<string, AnalyzerPlugin>();
+
+  register(plugin: AnalyzerPlugin): void {
+    this.plugins.push(plugin);
+    for (const ext of plugin.extensions) {
+      this.extMap.set(ext, plugin);
+    }
+    for (const name of plugin.filenames ?? []) {
+      this.filenameMap.set(name, plugin);
+    }
+  }
+
+  getForFile(filePath: string): AnalyzerPlugin | null {
+    const name = basename(filePath);
+    // Check exact filename first (Dockerfile, docker-compose.yml)
+    if (this.filenameMap.has(name)) return this.filenameMap.get(name)!;
+    // Then check extension
+    const dotIdx = name.lastIndexOf('.');
+    if (dotIdx >= 0) {
+      const ext = name.slice(dotIdx);
+      if (this.extMap.has(ext)) return this.extMap.get(ext)!;
+    }
+    return null;
+  }
+
+  getAll(): AnalyzerPlugin[] { return [...this.plugins]; }
+}
+```
+
+- [ ] **Step 3: Verify compilation**
+
+Run: `npx tsc --noEmit`
+Expected: No errors
+
+- [ ] **Step 4: Commit**
+
+```bash
+git add src/intel/analyzers/base.ts src/intel/analyzers/registry.ts
+git commit -m "feat(intel): add AnalyzerPlugin interface and registry with filename matching"
+```
+
+---
+
+### Task 4: Config Schema Addition
+
+**Files:**
+- Modify: `src/config/schema.ts`
+- Modify: `src/config/defaults.ts`
+
+> Moved before Scanner task — Scanner and Enrichment need these config values.
+
+- [ ] **Step 1: Add IntelConfigSchema to schema.ts**
+
+```typescript
+export const IntelConfigSchema = z.object({
+  enrichDepth: z.enum(['shallow', 'deep', 'none']).default('deep'),
+  maxTokenBudget: z.number().int().positive().default(500000),
+  storageDir: z.string().default('.jam/intel'),
+  autoScan: z.boolean().default(false),
+  excludePatterns: z.array(z.string()).default([
+    'node_modules', 'dist', '.git', 'vendor', '__pycache__', '.venv', 'target', 'build',
+  ]),
+  diagramFormat: z.literal('mermaid').default('mermaid'),
+  openBrowserOnScan: z.boolean().default(true),
+});
+export type IntelConfig = z.infer<typeof IntelConfigSchema>;
+```
+
+Add `intel: IntelConfigSchema.default({})` to `JamConfigSchema`.
+
+- [ ] **Step 2: Add defaults to `src/config/defaults.ts`**
+
+Add `intel: {}` to `CONFIG_DEFAULTS` (Zod defaults handle the rest).
+
+- [ ] **Step 3: Verify existing tests still pass**
+
+Run: `npx vitest run`
+Expected: All 388+ tests pass
+
+- [ ] **Step 4: Commit**
+
+```bash
+git add src/config/schema.ts src/config/defaults.ts
+git commit -m "feat(intel): add intel config schema with enrichment, storage, and diagram options"
+```
+
+---
+
+### Task 5: TypeScript/JavaScript Analyzer
+
+**Files:**
+- Create: `src/intel/analyzers/typescript.ts`
+- Create: `src/intel/analyzers/typescript.test.ts`
+
+- [ ] **Step 1: Write failing tests**
+
+Tests should cover:
+- File node extraction with `language: 'typescript'` (or 'javascript' for .js)
+- Exported function extraction → `function` nodes
+- Exported class extraction → `class` nodes
+- Import edge extraction using `extractImports()` from `src/analyzers/imports.ts`
+- Import resolution via `rootDir` parameter (resolve `./services/user.js` → `src/services/user.ts`)
+- Express route detection (`app.get('/path', handler)`) → `endpoint` nodes with `framework: 'express'`
+- React component detection (JSX return in `.tsx`) → `framework: 'react'`
+- `process.env.X` extraction → `config` nodes
+- `contains` edges from file to its symbols
+
+Note: `analyzeFile` receives `rootDir` so import paths can be resolved to actual files. Use `resolveImport()` from `src/analyzers/imports.ts` for resolution.
+
+- [ ] **Step 2: Run tests to verify they fail**
+
+Run: `npx vitest run src/intel/analyzers/typescript.test.ts`
+Expected: FAIL
+
+- [ ] **Step 3: Implement TypeScriptAnalyzer**
+
+Reuse:
+- `extractImports(content)` from `src/analyzers/imports.ts`
+- `resolveImport(importPath, fromFile, root)` from `src/analyzers/imports.ts`
+- `extractSymbols(content, file, module)` from `src/analyzers/structure.ts`
+
+Extensions: `.ts`, `.tsx`, `.js`, `.jsx`, `.mjs`, `.cjs`
+
+- [ ] **Step 4: Run tests to verify they pass**
+
+Run: `npx vitest run src/intel/analyzers/typescript.test.ts`
+Expected: All PASS
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/intel/analyzers/typescript.ts src/intel/analyzers/typescript.test.ts
+git commit -m "feat(intel): add TypeScript/JavaScript analyzer with Express and React detection"
+```
+
+---
+
+### Task 6: Python Analyzer
+
+**Files:**
+- Create: `src/intel/analyzers/python.ts`
+- Create: `src/intel/analyzers/python.test.ts`
+
+- [ ] **Step 1: Write failing tests**
+
+Tests should cover:
+- File node with `language: 'python'`
+- `import X` and `from X import Y` as import edges
+- `class` and `def` extraction
+- Flask routes: `@app.route('/path')` → endpoint nodes
+- Django URLs: `path('url', view)` → endpoint nodes
+- SQLAlchemy: `class X(Base):` with `Column()` → table nodes
+- Airflow DAGs: `@dag` or `DAG(` → framework metadata
+- dbt: detection deferred to framework detector (project-level)
+- Spark: `SparkSession` import → framework metadata
+- `os.environ` / `os.getenv` → config nodes
+
+Extensions: `.py`
+
+- [ ] **Step 2-4: Implement and verify**
+
+Regex-based. Same TDD cycle as Task 5.
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/intel/analyzers/python.ts src/intel/analyzers/python.test.ts
+git commit -m "feat(intel): add Python analyzer with Flask, Django, SQLAlchemy, Airflow, Spark detection"
+```
+
+---
+
+### Task 7: COBOL Analyzer
+
+**Files:**
+- Create: `src/intel/analyzers/cobol.ts`
+- Create: `src/intel/analyzers/cobol.test.ts`
+
+- [ ] **Step 1: Write failing tests**
+
+Tests should cover:
+- PROGRAM-ID extraction
+- COPY statement → import edges (COPYBOOK references)
+- CALL statement → `calls` edges
+- EXEC SQL → table references as `reads`/`writes` edges
+- EXEC CICS → `framework: 'cics'`
+- SECTION/PARAGRAPH extraction → function nodes
+- FD (file descriptor) extraction
+
+Extensions: `.cbl`, `.cob`, `.cpy`, `.CBL`, `.COB`, `.CPY`
+
+- [ ] **Step 2-4: Implement and verify**
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/intel/analyzers/cobol.ts src/intel/analyzers/cobol.test.ts
+git commit -m "feat(intel): add COBOL analyzer with COPYBOOK, EXEC SQL/CICS, CALL detection"
+```
+
+---
+
+### Task 8: SQL Analyzer
+
+**Files:**
+- Create: `src/intel/analyzers/sql.ts`
+- Create: `src/intel/analyzers/sql.test.ts`
+
+- [ ] **Step 1: Write failing tests**
+
+Tests should cover:
+- `CREATE TABLE X` → `table` node with column metadata
+- `ALTER TABLE` / `FOREIGN KEY REFERENCES Y` → `depends-on` edge
+- `INSERT INTO X` / `SELECT FROM X` → `writes`/`reads` edges
+- dbt `{{ ref('model') }}` → `depends-on` edge
+- dbt `{{ source('src', 'table') }}` → `reads` edge
+- Migration file ordering (from filename pattern)
+
+Extension: `.sql`
+
+- [ ] **Step 2-4: Implement and verify**
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/intel/analyzers/sql.ts src/intel/analyzers/sql.test.ts
+git commit -m "feat(intel): add SQL analyzer with dbt ref/source, CREATE TABLE, FK detection"
+```
+
+---
+
+### Task 9: Docker Analyzer
+
+**Files:**
+- Create: `src/intel/analyzers/docker.ts`
+- Create: `src/intel/analyzers/docker.test.ts`
+
+- [ ] **Step 1: Write failing tests**
+
+Tests should cover:
+- docker-compose.yml: service extraction → `service` nodes
+- `depends_on` → `deploys-with` edges
+- Port mappings as metadata
+- Volume mounts as metadata
+- Dockerfile: `FROM` → `external` node for base image
+- `EXPOSE` port as metadata
+
+Filenames: `Dockerfile`, `docker-compose.yml`, `docker-compose.yaml`, `compose.yml`, `compose.yaml`
+Extensions: (none — matched by filename)
+
+- [ ] **Step 2-4: Implement and verify**
+
+Simple line-by-line YAML parsing for docker-compose (detect `services:` block, parse indentation). No full YAML parser needed.
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/intel/analyzers/docker.ts src/intel/analyzers/docker.test.ts
+git commit -m "feat(intel): add Docker/docker-compose analyzer with service topology"
+```
+
+---
+
+### Task 10: OpenAPI Analyzer
+
+**Files:**
+- Create: `src/intel/analyzers/openapi.ts`
+- Create: `src/intel/analyzers/openapi.test.ts`
+
+- [ ] **Step 1: Write failing tests**
+
+Tests should cover:
+- `paths:` block → `endpoint` nodes with method + path
+- `components/schemas` → `schema` nodes
+- `$ref` references → edges between schemas
+- Detection: only analyze `.yaml`/`.yml`/`.json` files that contain `openapi:` or `swagger:` key
+
+Extensions: `.yaml`, `.yml` (filtered by content detection in `analyzeFile`)
+
+- [ ] **Step 2-4: Implement and verify**
+
+JSON.parse for `.json`. Simple line-by-line YAML parsing for paths and schemas (no full YAML parser).
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/intel/analyzers/openapi.ts src/intel/analyzers/openapi.test.ts
+git commit -m "feat(intel): add OpenAPI/Swagger analyzer with endpoint and schema extraction"
+```
+
+---
+
+### Task 11: Framework Detector
+
+**Files:**
+- Create: `src/intel/frameworks/detector.ts`
+- Create: `src/intel/frameworks/profiles.ts`
+- Create: `src/intel/frameworks/detector.test.ts`
+- Create: `src/intel/frameworks/profiles.test.ts`
+
+- [ ] **Step 1: Write failing tests**
+
+```typescript
+// Tests use temp directories with specific files to trigger detection
+// Each test creates the marker file and verifies the framework is detected
+
+describe('detectFrameworks', () => {
+  it('detects Express from package.json dependencies');
+  it('detects React from package.json dependencies');
+  it('detects dbt from dbt_project.yml');
+  it('detects Django from manage.py');
+  it('detects Flask from app.py with Flask import');
+  it('detects Airflow from dags/ directory with DAG imports');
+  it('detects Docker Compose from docker-compose.yml');
+  it('detects Prisma from schema.prisma');
+  it('detects Kafka from package.json or Python kafka imports');
+  it('detects Spark from PySpark imports');
+  it('detects SQLAlchemy from Python files with declarative_base');
+  it('returns empty for vanilla project');
+});
+```
+
+- [ ] **Step 2: Run tests to verify they fail**
+
+Run: `npx vitest run src/intel/frameworks/detector.test.ts`
+Expected: FAIL
+
+- [ ] **Step 3: Implement profiles and detector**
+
+`profiles.ts` — declarative detection rules:
+```typescript
+export interface FrameworkProfile {
+  name: string;
+  markers: Array<{
+    type: 'file-exists' | 'package-dep' | 'dir-exists' | 'file-contains';
+    pattern: string;
+    file?: string;
+  }>;
+}
+
+export const FRAMEWORK_PROFILES: FrameworkProfile[] = [
+  { name: 'express', markers: [{ type: 'package-dep', pattern: 'express' }] },
+  { name: 'react', markers: [{ type: 'package-dep', pattern: 'react' }] },
+  { name: 'dbt', markers: [{ type: 'file-exists', pattern: 'dbt_project.yml' }] },
+  { name: 'django', markers: [{ type: 'file-exists', pattern: 'manage.py' }] },
+  { name: 'airflow', markers: [{ type: 'dir-exists', pattern: 'dags' }] },
+  { name: 'docker-compose', markers: [{ type: 'file-exists', pattern: 'docker-compose.yml' }] },
+  { name: 'prisma', markers: [{ type: 'file-exists', pattern: 'schema.prisma' }] },
+  // ... etc.
+];
+```
+
+`detector.ts` — checks markers against filesystem.
+
+- [ ] **Step 4: Run tests to verify they pass**
+
+Run: `npx vitest run src/intel/frameworks/detector.test.ts`
+Expected: All PASS
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/intel/frameworks/
+git commit -m "feat(intel): add framework detector with profiles for Express, dbt, React, Django, Airflow, Prisma, Kafka, Spark"
+```
+
+---
+
+### Task 12: Analyzer Registry Setup
+
+**Files:**
+- Create: `src/intel/analyzers/registry.ts` (already has class — now add default setup)
+
+- [ ] **Step 1: Add createDefaultRegistry function**
+
+```typescript
+// Add to src/intel/analyzers/registry.ts
+import { TypeScriptAnalyzer } from './typescript.js';
+import { PythonAnalyzer } from './python.js';
+import { CobolAnalyzer } from './cobol.js';
+import { SqlAnalyzer } from './sql.js';
+import { DockerAnalyzer } from './docker.js';
+import { OpenApiAnalyzer } from './openapi.js';
+
+export function createDefaultRegistry(): AnalyzerRegistry {
+  const registry = new AnalyzerRegistry();
+  registry.register(new TypeScriptAnalyzer());
+  registry.register(new PythonAnalyzer());
+  registry.register(new CobolAnalyzer());
+  registry.register(new SqlAnalyzer());
+  registry.register(new DockerAnalyzer());
+  registry.register(new OpenApiAnalyzer());
+  return registry;
+}
+```
+
+- [ ] **Step 2: Verify compilation**
+
+Run: `npx tsc --noEmit`
+Expected: No errors
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add src/intel/analyzers/registry.ts
+git commit -m "feat(intel): add default analyzer registry with all v1 analyzers"
+```
+
+---
+
+### Task 13: Scanner (Orchestrator)
+
+**Files:**
+- Create: `src/intel/scanner.ts`
+- Create: `src/intel/scanner.test.ts`
+
+- [ ] **Step 1: Write failing tests using a real git fixture workspace**
+
+```typescript
+import { execSync } from 'node:child_process';
+
+beforeEach(async () => {
+  workspace = await mkdtemp(join(tmpdir(), 'jam-intel-scan-'));
+  execSync('git init', { cwd: workspace }); // REAL git repo required
+  // ... write fixture files ...
+  execSync('git add -A && git commit -m "init"', { cwd: workspace });
+});
+```
+
+Tests:
+- `scans a workspace and returns a graph` — nodeCount > 0, edgeCount > 0
+- `detects frameworks` — graph.frameworks includes 'express'
+- `creates file nodes for all source files` — at least 3 files
+- `creates endpoint nodes for Express routes` — at least 1 endpoint
+- `records mtimes for incremental scanning`
+- `incremental scan only re-analyzes changed files` — modify one file, re-scan, verify only that file's mtime updated
+
+- [ ] **Step 2: Run tests to verify they fail**
+
+Run: `npx vitest run src/intel/scanner.test.ts`
+Expected: FAIL
+
+- [ ] **Step 3: Implement Scanner**
+
+```typescript
+export class Scanner {
+  private registry: AnalyzerRegistry;
+
+  constructor(registry?: AnalyzerRegistry) {
+    this.registry = registry ?? createDefaultRegistry();
+  }
+
+  /** Collect all source files — extends getSourceFiles pattern for all languages */
+  async collectFiles(rootDir: string, excludePatterns: string[]): Promise<string[]> {
+    // Use git ls-files if in a git repo, else recursive readdir
+    // Filter by all registered analyzer extensions + filenames
+    // Exclude patterns from config (node_modules, dist, etc.)
+  }
+
+  /** Full or incremental scan */
+  async scan(rootDir: string, options?: {
+    previousGraph?: IntelGraph;
+    excludePatterns?: string[];
+  }): Promise<IntelGraph> {
+    const graph = new IntelGraph();
+    const files = await this.collectFiles(rootDir, options?.excludePatterns ?? [...]);
+    const frameworks = await detectFrameworks(rootDir);
+
+    for (const relPath of files) {
+      // Incremental: skip if mtime unchanged
+      const mtime = (await stat(join(rootDir, relPath))).mtimeMs;
+      if (options?.previousGraph?.mtimes[relPath] === mtime) {
+        // Copy nodes/edges from previous graph for this file
+        continue;
+      }
+
+      const analyzer = this.registry.getForFile(relPath);
+      if (!analyzer) continue;
+      const content = await readFile(join(rootDir, relPath), 'utf-8');
+      const result = analyzer.analyzeFile(content, relPath, rootDir);
+      for (const node of result.nodes) graph.addNode(node);
+      for (const edge of result.edges) graph.addEdge(edge);
+      graph.mtimes[relPath] = mtime;
+    }
+
+    // Cross-file analysis
+    for (const plugin of this.registry.getAll()) {
+      if (plugin.analyzeProject) {
+        const result = plugin.analyzeProject(graph.allNodes(), graph.allEdges(), rootDir);
+        for (const node of result.nodes) graph.addNode(node);
+        for (const edge of result.edges) graph.addEdge(edge);
+      }
+    }
+
+    graph.frameworks = frameworks;
+    graph.languages = [...new Set(graph.allNodes().filter(n => n.language).map(n => n.language!))];
+    return graph;
+  }
+}
+```
+
+- [ ] **Step 4: Run tests to verify they pass**
+
+Run: `npx vitest run src/intel/scanner.test.ts`
+Expected: All PASS
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/intel/scanner.ts src/intel/scanner.test.ts
+git commit -m "feat(intel): add Scanner orchestrator with incremental scan support"
+```
+
+---
+
+### Task 14: Storage Layer
+
+**Files:**
+- Create: `src/intel/storage.ts`
+- Create: `src/intel/storage.test.ts`
+
+- [ ] **Step 1: Write failing tests**
+
+Tests:
+- `saveGraph writes graph.json` — file exists after save
+- `loadGraph reads and deserializes` — roundtrip preserves data
+- `loadGraph returns null if no graph exists`
+- `saveEnrichment writes enrichment.json`
+- `loadEnrichment reads entries`
+- `saveMermaid writes .mmd file and returns path`
+- `checkGitignore returns false when .jam/intel not ignored`
+- `lock file prevents concurrent writes` — second save throws while locked
+- `lock file cleaned up after save`
+
+- [ ] **Step 2-3: Implement and verify**
+
+```typescript
+export async function saveGraph(graph: IntelGraph, rootDir: string): Promise<void>
+export async function loadGraph(rootDir: string): Promise<IntelGraph | null>
+export async function saveEnrichment(entries: SemanticMetadata[], meta: {...}, rootDir: string): Promise<void>
+export async function loadEnrichment(rootDir: string): Promise<SerializedEnrichment | null>
+export async function saveMermaid(mermaid: string, rootDir: string, filename?: string): Promise<string>
+export function checkGitignore(rootDir: string): boolean
+```
+
+Locking: Use `writeFile` with `O_EXCL` flag (fails if file exists) for `.lock`. Wrap operations in try/finally to clean up lock.
+
+Storage dir: `path.join(rootDir, '.jam', 'intel')`. Created automatically on first save.
+
+- [ ] **Step 4: Run tests to verify they pass**
+
+Run: `npx vitest run src/intel/storage.test.ts`
+Expected: All PASS
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/intel/storage.ts src/intel/storage.test.ts
+git commit -m "feat(intel): add graph storage layer with JSON persistence and file locking"
+```
+
+---
+
+### Task 15: Mermaid Diagram Generation
+
+**Files:**
+- Create: `src/intel/mermaid.ts`
+- Create: `src/intel/mermaid.test.ts`
+
+- [ ] **Step 1: Write failing tests**
+
+Tests:
+- `generates architecture diagram with graph TD` — contains subgraphs per module
+- `generates dependency diagram with graph LR`
+- `generates impact diagram for a node` — contains style highlighting
+- `generates flow diagram` — shows reads/writes/publishes/subscribes
+- `includes endpoints with hexagon shape`
+- `includes database nodes with cylinder shape`
+- `generates framework diagram for dbt` — shows ref() lineage
+- `formatQueryResultAsMermaid highlights matching nodes` — query results become a subgraph with styling
+
+- [ ] **Step 2-3: Implement**
+
+Functions:
+```typescript
+export function generateArchitectureDiagram(graph: IntelGraph, options?): string
+export function generateDepsDiagram(graph: IntelGraph, focus?): string
+export function generateFlowDiagram(graph: IntelGraph): string
+export function generateImpactDiagram(graph: IntelGraph, targetNodeId: string): string
+export function generateFrameworkDiagram(graph: IntelGraph, framework?: string): string
+export function formatQueryResultAsMermaid(nodes: IntelNode[], edges: IntelEdge[]): string
+```
+
+Mermaid shapes: `[( )]` for cylinders (tables), `{{ }}` for hexagons (endpoints), `[ ]` for boxes (modules), `([ ])` for rounded (services).
+
+Reference: `src/commands/diagram.ts:generateArchitectureDiagram()` for existing patterns.
+
+- [ ] **Step 4: Run tests to verify they pass**
+
+Run: `npx vitest run src/intel/mermaid.test.ts`
+Expected: All PASS
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/intel/mermaid.ts src/intel/mermaid.test.ts
+git commit -m "feat(intel): add Mermaid generators for architecture, deps, flow, impact, framework, query results"
+```
+
+---
+
+### Task 16: Mermaid Viewer (Static HTML)
+
+**Files:**
+- Create: `src/intel/viewer.ts`
+
+- [ ] **Step 1: Implement**
+
+```typescript
+export function generateViewerHtml(mermaidContent: string, mmdFilePath: string): string
+export async function openInBrowser(htmlPath: string): Promise<void>
+```
+
+The HTML:
+- Embeds Mermaid.js from CDN (`<script src="https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js">`)
+- Renders the diagram in a `<div class="mermaid">`
+- Polls `.mmd` file via fetch every 2 seconds for auto-reload
+- Dark theme
+
+`openInBrowser` uses `child_process.exec('open')` on macOS, `xdg-open` on Linux, `start` on Windows.
+
+- [ ] **Step 2: Verify compilation**
+
+Run: `npx tsc --noEmit`
+Expected: No errors
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add src/intel/viewer.ts
+git commit -m "feat(intel): add Mermaid viewer with auto-reload HTML page"
+```
+
+---
+
+### Task 17: LLM Enrichment Engine
+
+**Files:**
+- Create: `src/intel/enrichment.ts`
+- Create: `src/intel/enrichment.test.ts`
+
+- [ ] **Step 1: Write failing tests (mocked LLM)**
+
+Tests:
+- `prioritize returns high-connectivity nodes first`
+- `prioritize uses git churn data when available`
+- `enrichAll stops when budget exceeded`
+- `shallow enrichment produces only purpose and summary`
+- `deep enrichment produces all metadata fields`
+- `buildPrompt includes node context and neighbors` — use `vi.fn()` to capture prompt
+- `parseResponse extracts structured metadata from JSON response`
+- `getProgress returns 0-1 float`
+- `skips node on LLM error and continues`
+- `estimateTokens returns correct estimate for dry-run`
+
+Mock the provider:
+```typescript
+const mockProvider = {
+  info: { name: 'mock', supportsStreaming: true },
+  async *streamCompletion(req) {
+    yield { delta: JSON.stringify({ purpose: 'test', summary: 'test' }), done: true };
+  },
+} as unknown as ProviderAdapter;
+```
+
+- [ ] **Step 2-3: Implement**
+
+```typescript
+export class EnrichmentEngine {
+  constructor(private provider: ProviderAdapter) {}
+  prioritize(graph: IntelGraph, churnData?: Map<string, number>): string[]
+  async enrichNode(node: IntelNode, graph: IntelGraph, depth: EnrichDepth): Promise<SemanticMetadata>
+  async enrichAll(graph: IntelGraph, options: EnrichmentOptions): Promise<SemanticMetadata[]>
+  buildPrompt(node: IntelNode, neighbors: IntelNode[], depth: EnrichDepth): { system: string; user: string }
+  parseResponse(response: string, nodeId: string, depth: EnrichDepth): SemanticMetadata
+  estimateTokens(graph: IntelGraph, depth: EnrichDepth): number
+}
+```
+
+Priority formula: `score = inDegree(node) + outDegree(node) + (churnCount ?? 0)`. Sort descending.
+
+Token estimation: `nodeCount * tokensPerNode` where shallow = 200, deep = 600.
+
+- [ ] **Step 4: Run tests to verify they pass**
+
+Run: `npx vitest run src/intel/enrichment.test.ts`
+Expected: All PASS
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/intel/enrichment.ts src/intel/enrichment.test.ts
+git commit -m "feat(intel): add LLM enrichment engine with priority queue and budget control"
+```
+
+---
+
+### Task 18: Query Engine
+
+**Files:**
+- Create: `src/intel/query.ts`
+- Create: `src/intel/query.test.ts`
+
+- [ ] **Step 1: Write failing tests**
+
+Tests:
+- `offline keyword search matches node names`
+- `offline search with type filter returns only matching type`
+- `offline search returns empty for no matches`
+- `graph tools findNode returns correct nodes`
+- `graph tools getNeighbors returns connected nodes`
+- `graph tools filterByType returns typed nodes`
+- `formatQueryResult produces readable text output`
+- `query with --mermaid produces Mermaid output` — calls `formatQueryResultAsMermaid`
+- `NL query falls back to offline when chatWithTools unavailable`
+- `NL query with mocked chatWithTools executes graph operations`
+
+- [ ] **Step 2-3: Implement**
+
+```typescript
+export interface QueryResult {
+  nodes: IntelNode[];
+  edges: IntelEdge[];
+  explanation?: string;
+  mermaid?: string;
+}
+
+export const GRAPH_TOOLS: ToolDefinition[] = [
+  { name: 'findNode', description: 'Find nodes by keyword', parameters: { type: 'object', properties: { keyword: { type: 'string' } }, required: ['keyword'] } },
+  { name: 'getNeighbors', description: 'Get connected nodes', parameters: { type: 'object', properties: { nodeId: { type: 'string' }, direction: { type: 'string', enum: ['outgoing', 'incoming', 'both'] } }, required: ['nodeId'] } },
+  // ... traversePath, filterByType, filterByDomain
+];
+
+export async function query(
+  queryText: string,
+  graph: IntelGraph,
+  enrichment: SemanticMetadata[],
+  provider: ProviderAdapter | null,
+  options: QueryOptions,
+): Promise<QueryResult>
+```
+
+Key: check `provider?.chatWithTools != null` before attempting NL mode. Fall back to offline if not available.
+
+- [ ] **Step 4: Run tests to verify they pass**
+
+Run: `npx vitest run src/intel/query.test.ts`
+Expected: All PASS
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/intel/query.ts src/intel/query.test.ts
+git commit -m "feat(intel): add query engine with NL tool-use and offline keyword fallback"
+```
+
+---
+
+### Task 19: Barrel Export
+
+**Files:**
+- Create: `src/intel/index.ts`
+
+- [ ] **Step 1: Create barrel export**
+
+```typescript
+// src/intel/index.ts
+export { IntelGraph } from './graph.js';
+export { Scanner } from './scanner.js';
+export { EnrichmentEngine } from './enrichment.js';
+export { query } from './query.js';
+export { saveGraph, loadGraph, saveEnrichment, loadEnrichment, saveMermaid, checkGitignore } from './storage.js';
+export {
+  generateArchitectureDiagram, generateDepsDiagram, generateFlowDiagram,
+  generateImpactDiagram, generateFrameworkDiagram, formatQueryResultAsMermaid,
+} from './mermaid.js';
+export { generateViewerHtml, openInBrowser } from './viewer.js';
+export type * from './types.js';
+```
+
+- [ ] **Step 2: Verify compilation**
+
+Run: `npx tsc --noEmit`
+Expected: No errors
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add src/intel/index.ts
+git commit -m "feat(intel): add barrel export for intel module"
+```
+
+---
+
+### Task 20: CLI Command — `jam intel scan` + `jam intel status`
+
+**Files:**
+- Create: `src/commands/intel.ts`
+- Modify: `src/index.ts`
+
+- [ ] **Step 1: Implement scan and status subcommands**
+
+```typescript
+// src/commands/intel.ts
+import type { CliOverrides } from '../config/schema.js';
+
+export interface IntelScanOptions extends CliOverrides {
+  noEnrich?: boolean;
+  enrich?: string;
+  dryRun?: boolean;
+}
+
+export async function runIntelScan(options: IntelScanOptions): Promise<void> {
+  // Lazy imports inside the function
+  const { Scanner } = await import('../intel/scanner.js');
+  const { saveGraph, saveMermaid, loadGraph, checkGitignore } = await import('../intel/storage.js');
+  const { generateArchitectureDiagram } = await import('../intel/mermaid.js');
+  const { generateViewerHtml, openInBrowser } = await import('../intel/viewer.js');
+  // ...
+}
+
+export async function runIntelStatus(): Promise<void> {
+  const { loadGraph, loadEnrichment } = await import('../intel/storage.js');
+  // ...
+}
+```
+
+- [ ] **Step 2: Register in index.ts using lazy import pattern**
+
+```typescript
+// In src/index.ts — matches existing pattern
+const intel = program.command('intel').description('Codebase intelligence — analyze, query, visualize');
+
+intel.command('scan')
+  .description('Scan codebase and build knowledge graph')
+  .option('--no-enrich', 'Skip LLM enrichment')
+  .option('--enrich <depth>', 'Enrichment depth: shallow or deep', 'deep')
+  .option('--dry-run', 'Show scan estimate without running')
+  .action(async (cmdOpts) => {
+    const g = globalOpts();
+    const { runIntelScan } = await import('./commands/intel.js');
+    await runIntelScan({ profile: g.profile, provider: g.provider, ...cmdOpts });
+  });
+
+intel.command('status')
+  .description('Show knowledge graph stats and enrichment progress')
+  .action(async () => {
+    const { runIntelStatus } = await import('./commands/intel.js');
+    await runIntelStatus();
+  });
+```
+
+- [ ] **Step 3: Test scan end-to-end**
+
+Run: `npx tsx src/index.ts intel scan --no-enrich`
+Expected: Scans jam-cli repo, shows node/edge counts, generates architecture diagram
+
+- [ ] **Step 4: Test status**
+
+Run: `npx tsx src/index.ts intel status`
+Expected: Shows graph stats
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/commands/intel.ts src/index.ts
+git commit -m "feat(intel): add jam intel scan and status CLI commands"
+```
+
+---
+
+### Task 21: CLI Commands — `jam intel query`, `impact`, `diagram`, `explore`
+
+**Files:**
+- Modify: `src/commands/intel.ts`
+- Modify: `src/index.ts`
+
+- [ ] **Step 1: Add remaining command handlers to intel.ts**
+
+```typescript
+export async function runIntelQuery(text: string, options: IntelQueryOptions): Promise<void> { ... }
+export async function runIntelImpact(file: string, options: IntelImpactOptions): Promise<void> { ... }
+export async function runIntelDiagram(options: IntelDiagramOptions): Promise<void> { ... }
+export async function runIntelExplore(): Promise<void> { ... }
+```
+
+- [ ] **Step 2: Register remaining subcommands in index.ts with lazy imports**
+
+```typescript
+intel.command('query <text>')
+  .description('Query the knowledge graph')
+  .option('--no-ai', 'Use keyword search only (offline)')
+  .option('--mermaid', 'Output result as Mermaid diagram')
+  .action(async (text, cmdOpts) => {
+    const g = globalOpts();
+    const { runIntelQuery } = await import('./commands/intel.js');
+    await runIntelQuery(text, { profile: g.profile, provider: g.provider, ...cmdOpts });
+  });
+
+intel.command('impact <file>')
+  .description('Show impact analysis for a file')
+  .option('--mermaid', 'Output as Mermaid diagram')
+  .action(async (file, cmdOpts) => {
+    const { runIntelImpact } = await import('./commands/intel.js');
+    await runIntelImpact(file, cmdOpts);
+  });
+
+intel.command('diagram')
+  .description('Generate architecture diagram')
+  .option('--type <type>', 'architecture, flow, deps, impact, framework', 'architecture')
+  .option('-o, --output <file>', 'Output file path')
+  .action(async (cmdOpts) => {
+    const { runIntelDiagram } = await import('./commands/intel.js');
+    await runIntelDiagram(cmdOpts);
+  });
+
+intel.command('explore')
+  .description('Open knowledge graph in browser')
+  .action(async () => {
+    const { runIntelExplore } = await import('./commands/intel.js');
+    await runIntelExplore();
+  });
+```
+
+- [ ] **Step 3: Test query**
+
+Run: `npx tsx src/index.ts intel query "providers" --no-ai`
+Expected: Shows nodes matching "providers"
+
+- [ ] **Step 4: Test impact**
+
+Run: `npx tsx src/index.ts intel impact src/providers/base.ts`
+Expected: Shows files that depend on base.ts
+
+- [ ] **Step 5: Test diagram**
+
+Run: `npx tsx src/index.ts intel diagram --type architecture`
+Expected: Outputs Mermaid diagram to stdout
+
+- [ ] **Step 6: Test explore**
+
+Run: `npx tsx src/index.ts intel explore`
+Expected: Opens browser with Mermaid diagram viewer
+
+- [ ] **Step 7: Commit**
+
+```bash
+git add src/commands/intel.ts src/index.ts
+git commit -m "feat(intel): add jam intel query, impact, diagram, explore CLI commands"
+```
+
+---
+
+### Task 22: Integration Tests
+
+**Files:**
+- Create: `src/intel/intel.integration.test.ts`
+
+- [ ] **Step 1: Write integration tests**
+
+Fixture: real git repo with Express app + SQL migration + Dockerfile.
+
+Tests:
+- `scan → graph has correct node types` — file, function, class, endpoint, table, service, config
+- `scan → graph has correct edge types` — imports, contains, reads, exposes
+- `scan → detects Express framework`
+- `scan → generates valid Mermaid architecture diagram`
+- `scan → save → load roundtrip preserves graph`
+- `incremental scan only re-analyzes changed files`
+- `impact analysis traces through dependency chain`
+- `keyword query finds matching nodes`
+- `diagram --type deps shows module dependencies`
+- `enrichment save → load roundtrip` (mock enrichment data)
+
+- [ ] **Step 2: Run integration tests**
+
+Run: `npx vitest run src/intel/intel.integration.test.ts`
+Expected: All PASS
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add src/intel/intel.integration.test.ts
+git commit -m "test(intel): add integration tests for full scan→query→diagram pipeline"
+```
+
+---
+
+### Task 23: Build Verification & Smoke Test
+
+- [ ] **Step 1: Full build**
+
+Run: `npm run build`
+Expected: No TypeScript errors
+
+- [ ] **Step 2: Full test suite**
+
+Run: `npm test`
+Expected: All tests pass (existing 388 + new intel tests)
+
+- [ ] **Step 3: Verify help output**
+
+Run: `node dist/index.js intel --help`
+Expected: Shows all 6 subcommands
+
+- [ ] **Step 4: Manual smoke test**
+
+```bash
+node dist/index.js intel scan --no-enrich
+node dist/index.js intel status
+node dist/index.js intel query "provider" --no-ai
+node dist/index.js intel impact src/providers/base.ts
+node dist/index.js intel diagram
+node dist/index.js intel explore
+```
+
+- [ ] **Step 5: Final commit**
+
+```bash
+git add -A
+git commit -m "feat(intel): jam intel v1 complete — codebase intelligence with scan, query, impact, diagrams"
+```
diff --git a/docs/specs/2026-03-18-jam-intel-design.md b/docs/specs/2026-03-18-jam-intel-design.md
new file mode 100644
index 0000000..2f706fa
--- /dev/null
+++ b/docs/specs/2026-03-18-jam-intel-design.md
@@ -0,0 +1,454 @@
+# jam intel — Codebase Intelligence
+
+**Date:** 2026-03-18
+**Status:** Design reviewed, pending implementation plan
+
+## Overview
+
+`jam intel` is a codebase intelligence feature that analyzes entire repositories (or multiple repos) to build a semantic knowledge graph — understanding not just what code exists, but what it does, why it exists, and how changing one thing affects everything else. It provides interactive visual exploration through a VSCode sidebar panel and a full browser-based graph explorer with natural language querying.
+
+### What makes it different
+
+- **Understands intent, not just structure** — LLM-enriched nodes carry purpose, domain, pattern, and risk metadata. "This is the authentication middleware" vs "these files import each other."
+- **Multi-repo, multi-language** — links services across repositories, including legacy systems (COBOL) alongside modern stacks.
+- **Always current** — incremental re-scan detects changes via mtime (v1), file watcher keeps graph in continuous sync (v2). No stale architecture docs.
+- **Architecture diagram first** — initial scan immediately produces a visual architecture diagram before any LLM enrichment. The diagram upgrades in place as semantic understanding deepens.
+- **Queryable** — natural language queries answered against the graph with visual responses.
+
+## Relationship to Existing Code
+
+jam-cli already has analysis infrastructure that `jam intel` builds on:
+
+| Existing | Reuse in jam intel |
+|----------|-------------------|
+| `src/analyzers/imports.ts` — import graph builder (regex-based, cycle detection via Tarjan's) | Extend as the TS/JS import analyzer plugin. Add export tracking. |
+| `src/analyzers/structure.ts` — project structure analyzer (module grouping, symbol extraction, hotspot detection) | Reuse for the structural scan phase. Feed its `ProjectAnalysis` output into the knowledge graph. |
+| `src/analyzers/types.ts` — `Graph`, `ModuleInfo`, `SymbolInfo`, `ProjectAnalysis` types | Extend with new node/edge types for the knowledge graph. Maintain backwards compatibility. |
+| `src/utils/call-graph.ts` — call graph builder (definition finding, reference tracking, Mermaid output) | Reuse for `calls` edge extraction. Extend Mermaid output for architecture diagrams. |
+| `src/commands/diagram.ts` — Mermaid diagram generation | `jam intel diagram` delegates to this with richer graph data. `jam diagram` becomes an alias. |
+| `src/commands/stats.ts` — LOC, languages, complexity, git churn | Reuse git churn data for LLM enrichment prioritization (most-changed files first). |
+
+**Migration path for `jam diagram`:** `jam diagram` will remain as a standalone command for quick one-shot diagrams. `jam intel diagram` generates richer diagrams from the knowledge graph. Over time, `jam diagram` can optionally read from the intel graph if one exists, falling back to its current behavior.
+
+## Architecture
+
+### System Pipeline
+
+```
+Source Repos → Static Analyzers → LLM Enrichment → Knowledge Graph → Consumers
+```
+
+**Static Analyzers** (offline, seconds): Extend existing `src/analyzers/` with pluggable language analyzers. Builds the structural skeleton and immediately generates architecture diagram.
+
+**LLM Enrichment** (background, progressive): Adds semantic metadata to every node. Prioritized by connectivity × change frequency. Optional — can be skipped with `--no-enrich`.
+
+**Knowledge Graph**: Hybrid storage — JSON on disk (`.jam/intel/` directory per repo), in-memory graph at runtime for fast querying. Portable, no database dependency.
+
+**Consumers**: CLI (v1), browser explorer with Mermaid (v1), interactive browser app (v2), VSCode sidebar panel (v2), Copilot Chat (v2).
+
+### Data Model
+
+#### Nodes
+
+Every entity in the codebase is a node:
+
+| Type | Description |
+|------|-------------|
+| `repo` | A git repository |
+| `service` | A deployable unit / application |
+| `module` | A package / directory boundary |
+| `file` | A source file |
+| `class` / `function` | Code entities |
+| `endpoint` | API route (REST, gRPC, GraphQL) |
+| `table` / `schema` | Database entities |
+| `queue` / `event` | Async boundaries |
+| `config` | Env vars, feature flags |
+| `external` | 3rd party services / APIs |
+
+#### Edges
+
+Relationships between nodes:
+
+| Type | Description |
+|------|-------------|
+| `imports` | Code dependency |
+| `calls` | Runtime invocation |
+| `reads` / `writes` | Data access |
+| `publishes` / `subscribes` | Event flow |
+| `exposes` / `consumes` | API contract |
+| `contains` | Structural hierarchy |
+| `configures` | Config dependency |
+| `deploys-with` | Infrastructure relationship |
+
+#### Semantic Metadata (LLM-generated, per node)
+
+| Field | Description |
+|-------|-------------|
+| `purpose` | What it does, in plain English |
+| `pattern` | Architectural pattern detected |
+| `domain` | Business domain it belongs to |
+| `risk` | Change risk assessment |
+| `summary` | Natural language description |
+| `connections` | Semantic links static analysis can't see |
+
+## Analysis Pipeline
+
+### Phase 1: Instant Structural Scan (seconds, offline)
+
+No LLM needed. Reuses existing analyzers (`src/analyzers/imports.ts`, `src/analyzers/structure.ts`, `src/utils/call-graph.ts`). Builds the skeleton graph and immediately generates an architecture diagram.
+
+**Extracts:**
+- File tree and language detection (reuse from `jam stats`)
+- Import graph and exports / public API (extend `src/analyzers/imports.ts`)
+- Class and function signatures (extend `src/analyzers/structure.ts`)
+- Call graph (reuse `src/utils/call-graph.ts`)
+- Database schemas (SQL migrations, ORM models) — new analyzer
+- API routes (Express route detection) — new analyzer
+- Package manifests (package.json, requirements.txt, pom.xml, etc.) — new analyzer
+- Docker / docker-compose configuration — new analyzer
+- Environment variable references — new analyzer
+
+**Immediate output:**
+- Architecture diagram generated from structural data (Mermaid format, opens in browser via static HTML + Mermaid.js)
+- Graph is queryable via CLI immediately
+- Mermaid diagram saved to `.jam/intel/architecture.mmd`
+
+### Phase 2: Progressive LLM Enrichment (background, minutes)
+
+Runs in background while the user explores the structural graph. Nodes are enriched in priority order:
+
+1. **Priority 1** — Entry points, high-connectivity hubs, most-changed files (via git churn from `jam stats`)
+2. **Priority 2** — Service boundaries, API layers, database access patterns
+3. **Priority 3** — Internal modules, utilities, tests, leaf nodes
+
+As enrichment progresses:
+- Architecture diagram upgrades in place with semantic labels, domain groupings, purpose annotations
+- Flow diagrams are generated (data flow, request lifecycle, event flow)
+- API dependency maps appear
+- Cross-repo interaction diagrams surface (v2)
+
+**Per node, the LLM generates:** purpose label, domain tag, pattern detection, risk score, plain-English summary, semantic edges (relationships static analysis missed).
+
+**Enrichment depth levels:**
+- `--enrich=shallow` — summary and purpose only (~100 tokens/node)
+- `--enrich=deep` — full metadata including risk, patterns, semantic edges (~400 tokens/node)
+- `--no-enrich` — structural graph only, no LLM calls
+
+### Phase 3: File Watcher — Continuous Sync (v2)
+
+Deferred to v2. In v1, users re-run `jam intel scan` to update the graph (incremental — only re-analyzes changed files based on mtime comparison).
+
+In v2, the file watcher:
+- Runs as a background process started by `jam intel watch` or by the VSCode extension
+- Debounces rapid saves (500ms window)
+- Watches via `chokidar` or Node.js `fs.watch` (not polling)
+- On file change → re-parse that file, update graph edges, queue for LLM re-enrichment
+- On branch switch (detected via `.git/HEAD` change) → diff file tree, batch-update
+- Persists via the VSCode extension host process (not a standalone daemon)
+- Lock file (`.jam/intel/.lock`) prevents concurrent writes from multiple terminals
+
+### Language Support — Pluggable Analyzers
+
+Each language gets an analyzer plugin implementing an `Analyzer` interface:
+
+```typescript
+interface Analyzer {
+  languages: string[];           // e.g., ['typescript', 'javascript']
+  extensions: string[];          // e.g., ['.ts', '.tsx', '.js', '.jsx']
+  analyze(file: string): Node[]; // Extract nodes from a file
+  edges(nodes: Node[]): Edge[];  // Compute edges between nodes
+}
+```
+
+**v1 (Launch):** TypeScript/JavaScript (extend existing `src/analyzers/`), Python, COBOL, SQL (migrations/schemas), Docker/docker-compose, OpenAPI/Swagger
+
+**v2 (Expand):** Java, Go, Rust, C#/.NET, Ruby, Terraform/Kubernetes, GraphQL
+
+**v3 (Community):** Plugin API for custom analyzers (`jam plugin create --analyzer`)
+
+Note: v1 Python and COBOL analyzers will use regex-based extraction (similar to existing TS/JS approach in `src/analyzers/imports.ts`), not full AST parsing. This gives 80% coverage with manageable effort. AST-based parsing can be added per-language in subsequent versions.
+
+### Framework & Tool Intelligence
+
+Analyzers don't just parse language syntax — they detect frameworks, libraries, and tools and understand their semantic patterns. During the structural scan, the scanner identifies framework markers (config files, directory conventions, import patterns) and activates framework-specific intelligence.
+
+**How it works:** The scan detects framework markers (e.g., `dbt_project.yml` → dbt, `dag` directory with `@dag` decorators → Airflow, `app.use()` calls → Express middleware). Each framework has a knowledge profile that tells the analyzer what patterns to look for and what semantic relationships they imply.
+
+**v1 Framework Profiles:**
+
+| Framework / Tool | Detected by | Understands |
+|-----------------|-------------|-------------|
+| **dbt** | `dbt_project.yml`, `models/` dir | Source→staging→mart flow, `ref()` / `source()` DAG, transformation lineage, data warehouse modeling patterns |
+| **Apache Airflow** | `dags/` dir, `@dag` / `@task` decorators | DAG orchestration, task dependencies, operator types, schedule intervals, sensor triggers |
+| **Apache Spark / PySpark** | `SparkSession` imports, `.read` / `.write` chains | Transformation flow (read→transform→write), data sources/sinks, partition strategies |
+| **Express.js** | `express()`, `app.use()`, `Router()` | Middleware chain, route→handler mapping, error handlers, static serving |
+| **Django** | `settings.py`, `urls.py`, `models.py` | Models→views→urls→templates pattern, ORM relationships, middleware stack, admin registrations |
+| **Flask** | `Flask(__name__)`, `@app.route` | Route→handler, blueprint structure, SQLAlchemy models if present |
+| **React** | `package.json` deps, `.tsx`/`.jsx` files | Component tree, state management (Redux/Zustand/Context), route structure (React Router), data fetching patterns |
+| **Spring Boot** | `pom.xml` with spring-boot, `@Controller` | Controller→service→repository layers, bean dependency injection, entity relationships (v2) |
+| **SQLAlchemy** | `declarative_base()`, `Column()` imports | Table relationships, foreign keys, migration chain (Alembic) |
+| **Prisma** | `schema.prisma` | Data model, relations, migration history |
+| **Docker Compose** | `docker-compose.yml` | Service topology, network links, volume mounts, dependency ordering |
+| **Kafka / Event Streaming** | Producer/consumer imports, topic configs | Publish→subscribe topology, topic→consumer group mapping, event schemas |
+| **CICS / DB2 (COBOL)** | `EXEC CICS` / `EXEC SQL` statements | Transaction flow, BMS map screens, DB2 table access, COMMAREA structures |
+
+**Framework detection output:** When a framework is detected, the scan:
+1. Adds a `framework` metadata field to relevant nodes (e.g., `framework: 'dbt'`)
+2. Creates framework-specific edges (e.g., dbt `ref()` calls become `depends-on` edges between models)
+3. Generates framework-aware diagrams (e.g., dbt lineage as a transformation flow diagram, Airflow DAG as a task dependency diagram)
+4. Labels nodes with framework-specific roles (e.g., "dbt staging model", "Airflow sensor task", "Express error middleware")
+
+The LLM enrichment layer then builds on this — it understands the framework context and can answer questions like "show me the data transformation flow from raw sources to the analytics mart" or "what happens if this Airflow task fails?"
+
+**Adding new framework profiles:** Framework profiles are declarative JSON files that specify detection markers, node patterns, edge patterns, and diagram templates. In v3, the plugin API allows community-contributed framework profiles (`jam plugin create --framework`).
+
+### Mermaid Diagram Export
+
+All diagram outputs support Mermaid format as the primary export, leveraging jam's existing Mermaid infrastructure (`src/utils/call-graph.ts`, `jam diagram`). Every view of the knowledge graph is exportable:
+
+```
+jam intel diagram                          # Architecture overview (default)
+jam intel diagram --type flow              # Data / request flow diagram
+jam intel diagram --type deps              # Dependency graph
+jam intel diagram --type impact FILE       # Impact subgraph for a file
+jam intel diagram --type framework         # Framework-specific (e.g., dbt lineage, Airflow DAG)
+jam intel query "show auth flow" --mermaid # Export any query result as Mermaid
+```
+
+All `--mermaid` output can be piped to `jam md2pdf` or saved as `.mmd` files. The browser explorer (v1: static Mermaid.js page, v2: interactive) renders these natively. Framework-specific diagrams use appropriate Mermaid diagram types (flowchart for data pipelines, sequence diagrams for request flows, ER diagrams for data models).
+
+### Multi-Repo — Workspace Manifest
+
+Multiple repos are linked via an auto-generated workspace manifest:
+
+```json
+// .jam/intel/workspace.json
+{
+  "repos": [
+    { "name": "api-service", "path": "../api-service" },
+    { "name": "web-app", "path": "../web-app" },
+    { "name": "legacy-batch", "path": "../legacy-batch" }
+  ],
+  "crossRepoEdges": []
+}
+```
+
+**Lifecycle:** `jam intel scan --workspace ../a ../b ../c` creates the manifest with repo entries. `crossRepoEdges` starts empty. During LLM enrichment, the LLM discovers cross-repo connections (matching API contracts, shared types, event names, shared DB tables) and populates the edges automatically. Users can also manually add edges to the manifest. Subsequent scans preserve user-added edges and re-validate LLM-discovered ones.
+
+Multi-repo scanning is a v2 feature. v1 focuses on single-repo analysis.
+
+## Visualization & Query Layer
+
+### v1: CLI Output + Mermaid Diagrams
+
+**Architecture diagram:** Generated as Mermaid markup, rendered via a static HTML page bundled with Mermaid.js. `jam intel scan` opens this in the default browser. The HTML page auto-reloads when the `.mmd` file changes (simple file polling).
+
+**Query output:** Text responses in the terminal, optionally with Mermaid diagram output (`--format mermaid`).
+
+**Impact output:** Text list of affected files with risk levels (HIGH/MED/LOW), optionally with Mermaid subgraph.
+
+### v2: Interactive Browser Explorer
+
+A single-page application (likely using D3.js or Cytoscape.js) served from a local HTTP server (`jam intel explore`). Ships as bundled static assets within the npm package.
+
+Features:
+- Zoomable, pannable graph visualization
+- Filter chips: All Repos, Services, Data Flow, API Layer, Database
+- Natural language query bar
+- Click node → detail panel (purpose, dependencies, risk, file links)
+- Animated impact paths for query results
+- Drill-down: click a service → see its internal modules → see individual files
+
+### v2: VSCode Sidebar Panel + Extensions
+
+Specified in a separate design document. Includes: sidebar tree view, context-aware right-click actions, auto-scan triggers, command palette entries, and Copilot Chat `@jam /intel` participant.
+
+### Natural Language Queries
+
+Four categories of queries:
+
+**Explore:**
+- "Show me the authentication flow"
+- "What services does this project have?"
+- "How does data get from the API to the database?"
+- "Which COBOL programs share tables with the API?"
+
+**Impact Analysis:**
+- "What breaks if I rename the users table?"
+- "What depends on the PaymentService class?"
+- "If I change this API endpoint, who is affected?"
+- "Show the blast radius of modifying COPYBOOK-01"
+
+**Architecture:**
+- "Explain this project to me like I just joined"
+- "What patterns does this codebase use?"
+- "Where are the service boundaries?"
+- "Draw the request lifecycle for POST /orders"
+
+**Find & Navigate:**
+- "Where is user validation handled?"
+- "Show all database access points"
+- "Which files have the highest change risk?"
+- "Find all event publishers and subscribers"
+
+### Query Execution Model
+
+1. **LLM parses query** using tool-use / function-calling pattern. The LLM receives the query + a schema of available graph operations (`findNode`, `getNeighbors`, `traversePath`, `filterByType`, `filterByDomain`). It returns a structured query plan.
+2. **Graph engine executes** the plan against the in-memory graph. No LLM needed for traversal.
+3. **LLM summarizes results** — receives the subgraph and generates a natural-language explanation with context.
+4. **Output rendered** as text (CLI) or highlighted subgraph (browser explorer).
+
+**Latency target:** < 5 seconds for most queries (one LLM call to parse, graph traversal is instant, one LLM call to summarize).
+
+**Offline mode:** When no LLM is available, queries fall back to keyword matching against node names, types, and file paths. Results are structural only (no semantic interpretation). The `--no-ai` flag forces this mode.
+
+## Configuration
+
+New fields in `JamConfigSchema` (`src/config/schema.ts`):
+
+```typescript
+intel: {
+  enrichDepth: 'shallow' | 'deep' | 'none',  // default: 'deep'
+  maxTokenBudget: number,                      // default: 500000 (per scan)
+  storageDir: string,                          // default: '.jam/intel'
+  autoScan: boolean,                           // default: false (v2: true when file watcher enabled)
+  excludePatterns: string[],                   // default: ['node_modules', 'dist', '.git', 'vendor']
+  diagramFormat: 'mermaid',                     // default: 'mermaid' (more formats in v2)
+  openBrowserOnScan: boolean,                  // default: true
+}
+```
+
+## Storage & Scalability
+
+### File Layout
+
+```
+.jam/intel/
+├── graph.json          # Node and edge data (structural)
+├── enrichment.json     # LLM-generated metadata (separate for easy regeneration)
+├── architecture.mmd    # Latest architecture diagram (Mermaid)
+├── workspace.json      # Multi-repo manifest (if applicable)
+└── .lock               # Prevents concurrent writes
+```
+
+Structural data (`graph.json`) and LLM enrichment (`enrichment.json`) are stored separately so enrichment can be regenerated without re-scanning, and structural data remains useful without any LLM.
+
+### Size Estimates
+
+| Repo size | Nodes | graph.json | enrichment.json | Memory |
+|-----------|-------|------------|-----------------|--------|
+| Small (100 files) | ~500 | ~200KB | ~300KB | ~5MB |
+| Medium (1000 files) | ~5,000 | ~2MB | ~3MB | ~30MB |
+| Large (10,000 files) | ~50,000 | ~20MB | ~30MB | ~200MB |
+
+For large repos (>5,000 nodes), the graph is sharded by module into separate JSON files under `.jam/intel/shards/`. The in-memory graph loads lazily — only the top-level module graph is loaded initially, with sub-module graphs loaded on drill-down.
+
+**Gitignore:** `.jam/intel/` should be added to `.gitignore` by default. The enrichment data varies by model and is not reproducible. `jam intel scan` warns if the directory is not gitignored.
+
+## Cost Model
+
+### Token Estimates (per scan)
+
+| Enrichment | Tokens/node | 500-file repo | 1000-file repo | 5000-file repo |
+|------------|-------------|---------------|----------------|----------------|
+| `shallow` | ~200 | ~100K | ~200K | ~1M |
+| `deep` | ~600 | ~300K | ~600K | ~3M |
+
+### Provider Considerations
+
+| Provider | Practical limit | Notes |
+|----------|----------------|-------|
+| Ollama (local) | No token cost, but slow on large repos | Enrichment may take 10-30 min for 1000+ files |
+| Copilot (via VSCode) | Free with subscription, rate limited | May need to throttle enrichment requests |
+| Anthropic / OpenAI | Token cost applies | `maxTokenBudget` config enforced; scan stops enrichment when budget exhausted |
+| Groq | Fast but rate limited | Good for shallow enrichment |
+
+`jam intel scan` reports estimated token usage before starting enrichment. With `--dry-run`, it shows the estimate without starting.
+
+## CLI Commands
+
+```
+jam intel scan                              # Scan current repo, generate architecture diagram
+jam intel scan --no-enrich                  # Structural scan only, no LLM
+jam intel scan --enrich=shallow             # Lighter LLM pass
+jam intel scan --dry-run                    # Show scan estimate without running
+jam intel scan --workspace ../a ../b        # Multi-repo scan (v2)
+jam intel query "what handles auth?"        # Natural language query
+jam intel query "auth" --no-ai              # Keyword-based structural query (offline)
+jam intel impact src/models/user.ts         # Impact analysis for a specific file
+jam intel explore                           # Open Mermaid diagram in browser (v1) / interactive explorer (v2)
+jam intel diagram --format mermaid          # Export architecture diagram
+jam intel status                            # Enrichment progress and graph stats
+```
+
+### Scan Output Behavior
+
+```
+$ jam intel scan
+⚡ Structural scan... 247 files, 1,842 nodes, 3,291 edges (2.1s)
+🏗️ Architecture diagram generated → opening in browser...
+🧠 LLM enrichment started in background (est. ~150K tokens, 2-3 min)
+💾 Saved to .jam/intel/graph.json
+```
+
+The architecture diagram is the hero artifact — generated immediately from structural data, opens in browser, and progressively upgrades as the LLM enriches nodes.
+
+## Phasing Summary
+
+### v1 — Core (this spec)
+
+- Structural scan with pluggable analyzers (TS/JS, Python, COBOL, SQL, Docker, OpenAPI)
+- Framework & tool intelligence (dbt, Airflow, Spark, Express, Django, Flask, React, SQLAlchemy, Prisma, Docker Compose, Kafka, CICS/DB2)
+- Knowledge graph data model + JSON storage
+- Progressive LLM enrichment with priority ordering and budget controls
+- Architecture diagram (Mermaid) generated immediately on scan — the hero artifact
+- Mermaid export for all diagram types (`--type flow`, `deps`, `impact`, `framework`) and query results (`--mermaid`)
+- CLI commands: `scan`, `query`, `impact`, `explore`, `diagram`, `status`
+- NL query via CLI with tool-use pattern
+- Single-repo only
+
+### v2 — Interactive + Multi-Repo
+
+- Interactive browser explorer (D3/Cytoscape SPA)
+- Multi-repo workspace manifest with cross-repo edge discovery
+- File watcher for continuous sync
+- VSCode sidebar panel, context menus, hover providers (separate spec)
+- Copilot Chat `@jam /intel` participant (separate spec)
+- Additional language analyzers (Java, Go, Rust, C#, Ruby)
+- Additional framework profiles (Spring Boot, NestJS, FastAPI, Terraform, etc.)
+
+### v3 — Community + Enterprise
+
+- Plugin API for custom analyzers and framework profiles
+- Terraform/Kubernetes infrastructure mapping
+- Annotation layer (pin notes, tag ownership, save custom views)
+- Team sharing (export/import knowledge graphs)
+- GraphQL schema support
+
+## Testing Strategy
+
+### Fixtures
+
+- **Small TS/JS fixture repo** (~20 files): Express API with routes, models, services, tests. Used for structural scan and enrichment tests.
+- **Python fixture repo** (~15 files): Flask app with SQLAlchemy models. Tests Python analyzer.
+- **COBOL fixture** (~10 programs): Batch jobs with COPYBOOK references and DB2 access. Tests COBOL analyzer.
+- **Multi-language fixture** (~30 files): TS backend + Python ML service + SQL migrations. Tests cross-language edge detection.
+
+### Test Categories
+
+- **Static analyzers** (unit): Each analyzer tested against its fixture repo. Verify correct nodes, edges, and metadata extraction. Target: ~15 tests per analyzer.
+- **Graph model** (unit): Node/edge CRUD, traversal algorithms, serialization/deserialization, sharding. Target: ~25 tests.
+- **LLM enrichment** (unit, mocked): Prompt construction verified against snapshots. Response parsing with recorded LLM outputs. Budget enforcement tested. Target: ~15 tests.
+- **Query layer** (integration): Pre-built graph + canned queries → verify correct subgraph extraction and output format. Both NL mode (mocked LLM) and offline keyword mode. Target: ~20 tests.
+- **CLI commands** (integration): End-to-end tests running `jam intel scan` / `query` / `impact` against fixture repos. Target: ~15 tests.
+- **Performance benchmarks**: Structural scan of 500-file repo completes in < 3 seconds. Graph load of 5,000-node JSON completes in < 1 second. Query against 5,000-node graph returns in < 500ms (excluding LLM time).
+
+## Competitive Positioning
+
+| vs | jam intel difference |
+|----|---------------------|
+| Sourcegraph / CodeSee | Those map structure. jam intel understands intent. |
+| GitHub Copilot Workspace | Copilot helps write code. jam intel helps understand systems. |
+| Architecture docs | Docs go stale day two. jam intel is always current. |
+| Generic dep graphs | Static import trees. jam intel adds semantic meaning, risk, and NL queries. |
+| Everyone | Nobody does COBOL + modern stack in one graph. Enterprise legacy-to-cloud niche. |
diff --git a/src/commands/intel.ts b/src/commands/intel.ts
new file mode 100644
index 0000000..8df74cc
--- /dev/null
+++ b/src/commands/intel.ts
@@ -0,0 +1,249 @@
+import chalk from 'chalk';
+import type { CliOverrides } from '../config/schema.js';
+
+export interface IntelScanOptions extends CliOverrides {
+  enrich?: string;    // 'shallow' | 'deep' | undefined (--no-enrich sets to 'none' logically via absence)
+  noEnrich?: boolean; // set by --no-enrich flag
+  dryRun?: boolean;
+}
+
+export async function runIntelScan(options: IntelScanOptions): Promise<void> {
+  const { Scanner, saveGraph, saveMermaid, loadGraph, checkGitignore,
+          generateArchitectureDiagram, generateViewerHtml, openInBrowser } = await import('../intel/index.js');
+  const { getWorkspaceRoot } = await import('../utils/workspace.js');
+  const { loadConfig, getActiveProfile } = await import('../config/loader.js');
+
+  const rootDir = await getWorkspaceRoot();
+  const config = await loadConfig(process.cwd(), options);
+  const intelConfig = config.intel;
+
+  // Load previous graph for incremental scan
+  const previousGraph = await loadGraph(rootDir);
+
+  // Scan
+  const scanner = new Scanner();
+  console.log(chalk.yellow('⚡ Scanning codebase...'));
+  const startTime = Date.now();
+  const graph = await scanner.scan(rootDir, {
+    previousGraph: previousGraph ?? undefined,
+    excludePatterns: intelConfig.excludePatterns,
+  });
+  const elapsed = ((Date.now() - startTime) / 1000).toFixed(1);
+
+  console.log(chalk.green(`⚡ Structural scan... ${graph.getStats().fileCount} files, ${graph.nodeCount} nodes, ${graph.edgeCount} edges (${elapsed}s)`));
+
+  if (graph.frameworks.length > 0) {
+    console.log(chalk.cyan(`🔧 Frameworks detected: ${graph.frameworks.join(', ')}`));
+  }
+
+  // Dry run — just show estimate
+  if (options.dryRun) {
+    const depth = (typeof options.enrich === 'string' ? options.enrich : intelConfig.enrichDepth) as 'shallow' | 'deep';
+    const tokens = graph.estimateTokens(depth);
+    console.log(chalk.blue(`📊 Estimated tokens for ${depth} enrichment: ~${tokens.toLocaleString()}`));
+    return;
+  }
+
+  // Save graph
+  await saveGraph(graph, rootDir);
+  console.log(chalk.dim(`💾 Saved to .jam/intel/graph.json`));
+
+  // Gitignore warning
+  if (!checkGitignore(rootDir)) {
+    console.log(chalk.yellow('⚠️  Consider adding .jam/intel/ to .gitignore'));
+  }
+
+  // Generate architecture diagram
+  const mermaid = generateArchitectureDiagram(graph);
+  const mmdPath = await saveMermaid(mermaid, rootDir);
+  console.log(chalk.green('🏗️  Architecture diagram generated'));
+
+  // Open in browser if configured
+  if (intelConfig.openBrowserOnScan) {
+    const { writeFile } = await import('node:fs/promises');
+    const { join, dirname } = await import('node:path');
+    const htmlContent = generateViewerHtml(mermaid, mmdPath);
+    const htmlPath = join(dirname(mmdPath), 'viewer.html');
+    await writeFile(htmlPath, htmlContent);
+    await openInBrowser(htmlPath);
+    console.log(chalk.green('🌐 Opened in browser'));
+  }
+
+  // LLM enrichment (unless --no-enrich)
+  const enrichDepth = options.noEnrich ? 'none'
+    : typeof options.enrich === 'string' ? options.enrich
+    : intelConfig.enrichDepth;
+
+  if (enrichDepth !== 'none') {
+    try {
+      const { createProvider } = await import('../providers/factory.js');
+      const profile = getActiveProfile(config);
+      const provider = await createProvider(profile);
+      const { EnrichmentEngine } = await import('../intel/index.js');
+      const { saveEnrichment } = await import('../intel/index.js');
+
+      const engine = new EnrichmentEngine(provider);
+      const tokens = graph.estimateTokens(enrichDepth as 'shallow' | 'deep');
+      console.log(chalk.blue(`🧠 LLM enrichment started (est. ~${tokens.toLocaleString()} tokens)`));
+
+      const entries = await engine.enrichAll(graph, {
+        depth: enrichDepth as 'shallow' | 'deep',
+        maxTokenBudget: intelConfig.maxTokenBudget,
+        onProgress: (progress) => {
+          if (Math.round(progress * 100) % 10 === 0) {
+            process.stdout.write(chalk.dim(`\r  ${Math.round(progress * 100)}% enriched`));
+          }
+        },
+      });
+
+      console.log('');
+      await saveEnrichment(entries, { depth: enrichDepth as 'shallow' | 'deep', tokensUsed: 0 }, rootDir);
+      console.log(chalk.green(`🧠 Enrichment complete — ${entries.length} nodes enriched`));
+    } catch (err) {
+      console.log(chalk.yellow(`⚠️  Enrichment skipped: ${err instanceof Error ? err.message : 'provider unavailable'}`));
+    }
+  }
+}
+
+export async function runIntelStatus(): Promise<void> {
+  const { loadGraph, loadEnrichment } = await import('../intel/index.js');
+  const { getWorkspaceRoot } = await import('../utils/workspace.js');
+
+  const rootDir = await getWorkspaceRoot();
+  const graph = await loadGraph(rootDir);
+
+  if (!graph) {
+    console.log(chalk.yellow('No knowledge graph found. Run `jam intel scan` first.'));
+    return;
+  }
+
+  const stats = graph.getStats();
+  const enrichment = await loadEnrichment(rootDir);
+
+  console.log(chalk.bold('jam intel status'));
+  console.log(`  Nodes: ${stats.nodeCount}`);
+  console.log(`  Edges: ${stats.edgeCount}`);
+  console.log(`  Files: ${stats.fileCount}`);
+  console.log(`  Languages: ${stats.languages.join(', ') || 'none'}`);
+  console.log(`  Frameworks: ${stats.frameworks.join(', ') || 'none'}`);
+
+  if (enrichment) {
+    const pct = Math.round((enrichment.entries.length / stats.nodeCount) * 100);
+    console.log(`  Enrichment: ${pct}% (${enrichment.entries.length}/${stats.nodeCount} nodes)`);
+    console.log(`  Tokens used: ${enrichment.tokensUsed.toLocaleString()}`);
+  } else {
+    console.log(`  Enrichment: none`);
+  }
+}
+
+export async function runIntelQuery(text: string, options: { noAi?: boolean; mermaid?: boolean; profile?: string; provider?: string; model?: string; baseUrl?: string }): Promise<void> {
+  const { loadGraph, loadEnrichment, query } = await import('../intel/index.js');
+  const { getWorkspaceRoot } = await import('../utils/workspace.js');
+
+  const rootDir = await getWorkspaceRoot();
+  const graph = await loadGraph(rootDir);
+  if (!graph) { console.log(chalk.yellow('No graph. Run `jam intel scan` first.')); return; }
+
+  const enrichment = await loadEnrichment(rootDir);
+
+  let provider = null;
+  if (!options.noAi) {
+    try {
+      const { loadConfig, getActiveProfile } = await import('../config/loader.js');
+      const { createProvider } = await import('../providers/factory.js');
+      const config = await loadConfig(process.cwd(), options);
+      const profile = getActiveProfile(config);
+      provider = await createProvider(profile);
+    } catch { /* fall back to offline */ }
+  }
+
+  const result = await query(text, graph, enrichment?.entries ?? [], provider, { noAi: options.noAi, mermaid: options.mermaid });
+
+  if (result.explanation) console.log(result.explanation);
+  if (result.nodes.length > 0 && !result.explanation) {
+    console.log(chalk.bold(`Found ${result.nodes.length} matching nodes:`));
+    for (const node of result.nodes) {
+      console.log(`  ${chalk.cyan(node.type)} ${node.name}${node.filePath ? chalk.dim(` (${node.filePath})`) : ''}`);
+    }
+  }
+  if (result.mermaid) { console.log('\n' + result.mermaid); }
+  if (result.nodes.length === 0 && !result.explanation) { console.log(chalk.yellow('No results found.')); }
+}
+
+export async function runIntelImpact(file: string, options: { mermaid?: boolean }): Promise<void> {
+  const { loadGraph, generateImpactDiagram } = await import('../intel/index.js');
+  const { getWorkspaceRoot } = await import('../utils/workspace.js');
+  const { relative } = await import('node:path');
+
+  const rootDir = await getWorkspaceRoot();
+  const graph = await loadGraph(rootDir);
+  if (!graph) { console.log(chalk.yellow('No graph. Run `jam intel scan` first.')); return; }
+
+  const relFile = relative(rootDir, file).replace(/\\/g, '/');
+  const nodeId = `file:${relFile}`;
+  const node = graph.getNode(nodeId);
+  if (!node) { console.log(chalk.yellow(`Node not found: ${nodeId}`)); return; }
+
+  const impacted = graph.getImpactSubgraph(nodeId);
+
+  if (impacted.length === 0) {
+    console.log(chalk.green('No other files depend on this.'));
+    return;
+  }
+
+  console.log(chalk.bold(`Impact analysis for ${relFile}:`));
+  console.log(`  ${impacted.length} files affected:\n`);
+  for (const n of impacted) {
+    console.log(`  ${chalk.cyan(n.type)} ${n.name}${n.filePath ? chalk.dim(` (${n.filePath})`) : ''}`);
+  }
+
+  if (options.mermaid) {
+    console.log('\n' + generateImpactDiagram(graph, nodeId));
+  }
+}
+
+export async function runIntelDiagram(options: { type?: string; output?: string }): Promise<void> {
+  const { loadGraph, generateArchitectureDiagram, generateDepsDiagram, generateFlowDiagram, generateFrameworkDiagram } = await import('../intel/index.js');
+  const { getWorkspaceRoot } = await import('../utils/workspace.js');
+
+  const rootDir = await getWorkspaceRoot();
+  const graph = await loadGraph(rootDir);
+  if (!graph) { console.log(chalk.yellow('No graph. Run `jam intel scan` first.')); return; }
+
+  const type = options.type ?? 'architecture';
+  let mermaid: string;
+  switch (type) {
+    case 'architecture': mermaid = generateArchitectureDiagram(graph); break;
+    case 'deps': mermaid = generateDepsDiagram(graph); break;
+    case 'flow': mermaid = generateFlowDiagram(graph); break;
+    case 'framework': mermaid = generateFrameworkDiagram(graph); break;
+    default: console.log(chalk.yellow(`Unknown type: ${type}`)); return;
+  }
+
+  if (options.output) {
+    const { writeFile } = await import('node:fs/promises');
+    await writeFile(options.output, mermaid);
+    console.log(chalk.green(`Diagram saved to ${options.output}`));
+  } else {
+    console.log(mermaid);
+  }
+}
+
+export async function runIntelExplore(): Promise<void> {
+  const { loadGraph, generateArchitectureDiagram, saveMermaid, generateViewerHtml, openInBrowser } = await import('../intel/index.js');
+  const { getWorkspaceRoot } = await import('../utils/workspace.js');
+  const { writeFile } = await import('node:fs/promises');
+  const { join, dirname } = await import('node:path');
+
+  const rootDir = await getWorkspaceRoot();
+  const graph = await loadGraph(rootDir);
+  if (!graph) { console.log(chalk.yellow('No graph. Run `jam intel scan` first.')); return; }
+
+  const mermaid = generateArchitectureDiagram(graph);
+  const mmdPath = await saveMermaid(mermaid, rootDir);
+  const htmlContent = generateViewerHtml(mermaid, mmdPath);
+  const htmlPath = join(dirname(mmdPath), 'viewer.html');
+  await writeFile(htmlPath, htmlContent);
+  await openInBrowser(htmlPath);
+  console.log(chalk.green('🌐 Explorer opened in browser'));
+}
diff --git a/src/config/defaults.ts b/src/config/defaults.ts
index 851ce4b..5857da7 100644
--- a/src/config/defaults.ts
+++ b/src/config/defaults.ts
@@ -17,4 +17,13 @@ export const CONFIG_DEFAULTS: JamConfig = {
   cacheEnabled: true,
   cacheTtlSeconds: 3600,
   copilotAutoInstall: true,
+  intel: {
+    enrichDepth: 'deep',
+    maxTokenBudget: 500000,
+    storageDir: '.jam/intel',
+    autoScan: false,
+    excludePatterns: ['node_modules', 'dist', '.git', 'vendor', '__pycache__', '.venv', 'target', 'build'],
+    diagramFormat: 'mermaid',
+    openBrowserOnScan: true,
+  },
 };
diff --git a/src/config/schema.ts b/src/config/schema.ts
index 130fb2b..a4714eb 100644
--- a/src/config/schema.ts
+++ b/src/config/schema.ts
@@ -80,6 +80,19 @@ export const JiraConfigSchema = z.object({
 }).optional();
 export type JiraConfig = z.infer<typeof JiraConfigSchema>;
 
+export const IntelConfigSchema = z.object({
+  enrichDepth: z.enum(['shallow', 'deep', 'none']).default('deep'),
+  maxTokenBudget: z.number().int().positive().default(500000),
+  storageDir: z.string().default('.jam/intel'),
+  autoScan: z.boolean().default(false),
+  excludePatterns: z.array(z.string()).default([
+    'node_modules', 'dist', '.git', 'vendor', '__pycache__', '.venv', 'target', 'build',
+  ]),
+  diagramFormat: z.literal('mermaid').default('mermaid'),
+  openBrowserOnScan: z.boolean().default(true),
+});
+export type IntelConfig = z.infer<typeof IntelConfigSchema>;
+
 export const JamConfigSchema = z.object({
   defaultProfile: z.string().default('default'),
   profiles: z.record(ProfileSchema).default({}),
@@ -107,6 +120,7 @@ export const JamConfigSchema = z.object({
   disabledPlugins: z.array(z.string()).optional(),
   /** Whether to prompt for @github/copilot CLI installation when not found (default: true). */
   copilotAutoInstall: z.boolean().default(true),
+  intel: IntelConfigSchema.default({}),
 });
 export type JamConfig = z.infer<typeof JamConfigSchema>;
 
diff --git a/src/index.ts b/src/index.ts
index 628e7c7..81cae66 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -799,6 +799,72 @@ program
     });
   });
 
+// ── intel ─────────────────────────────────────────────────────────────────────
+const intel = program.command('intel').description('Codebase intelligence — analyze, query, visualize');
+
+intel.command('scan')
+  .description('Scan codebase and build knowledge graph')
+  .option('--no-enrich', 'Skip LLM enrichment')
+  .option('--enrich <depth>', 'Enrichment depth: shallow or deep')
+  .option('--dry-run', 'Show scan estimate without running')
+  .action(async (cmdOpts: Record<string, unknown>) => {
+    const g = globalOpts();
+    const { runIntelScan } = await import('./commands/intel.js');
+    // Commander sets enrich=false when --no-enrich is passed; map to noEnrich flag
+    const enrichVal = cmdOpts['enrich'];
+    await runIntelScan({
+      profile: g.profile,
+      provider: g.provider,
+      model: g.model,
+      baseUrl: g.baseUrl,
+      noColor: g.color === false,
+      noEnrich: enrichVal === false,
+      enrich: typeof enrichVal === 'string' ? enrichVal : undefined,
+      dryRun: cmdOpts['dryRun'] as boolean | undefined,
+    });
+  });
+
+intel.command('status')
+  .description('Show knowledge graph stats and enrichment progress')
+  .action(async () => {
+    const { runIntelStatus } = await import('./commands/intel.js');
+    await runIntelStatus();
+  });
+
+intel.command('query <text>')
+  .description('Query the knowledge graph')
+  .option('--no-ai', 'Use keyword search only (offline)')
+  .option('--mermaid', 'Output result as Mermaid diagram')
+  .action(async (text: string, cmdOpts: Record<string, unknown>) => {
+    const g = globalOpts();
+    const { runIntelQuery } = await import('./commands/intel.js');
+    await runIntelQuery(text, { profile: g.profile, provider: g.provider, model: g.model, baseUrl: g.baseUrl, noAi: cmdOpts['ai'] === false, mermaid: cmdOpts['mermaid'] as boolean | undefined });
+  });
+
+intel.command('impact <file>')
+  .description('Show impact analysis for a file')
+  .option('--mermaid', 'Output as Mermaid diagram')
+  .action(async (file: string, cmdOpts: Record<string, unknown>) => {
+    const { runIntelImpact } = await import('./commands/intel.js');
+    await runIntelImpact(file, { mermaid: cmdOpts['mermaid'] as boolean | undefined });
+  });
+
+intel.command('diagram')
+  .description('Generate architecture diagram')
+  .option('--type <type>', 'architecture, flow, deps, framework', 'architecture')
+  .option('-o, --output <file>', 'Output file path')
+  .action(async (cmdOpts: Record<string, unknown>) => {
+    const { runIntelDiagram } = await import('./commands/intel.js');
+    await runIntelDiagram({ type: cmdOpts['type'] as string | undefined, output: cmdOpts['output'] as string | undefined });
+  });
+
+intel.command('explore')
+  .description('Open knowledge graph in browser')
+  .action(async () => {
+    const { runIntelExplore } = await import('./commands/intel.js');
+    await runIntelExplore();
+  });
+
 // ── plugin ───────────────────────────────────────────────────────────────────
 const pluginCmd = program.command('plugin').description('Manage jam plugins');
 
diff --git a/src/intel/analyzers/base.ts b/src/intel/analyzers/base.ts
new file mode 100644
index 0000000..d87137d
--- /dev/null
+++ b/src/intel/analyzers/base.ts
@@ -0,0 +1,24 @@
+import type { IntelNode, IntelEdge } from '../types.js';
+
+export interface FileAnalysis {
+  nodes: IntelNode[];
+  edges: IntelEdge[];
+}
+
+export interface ProjectAnalysisResult {
+  nodes: IntelNode[];
+  edges: IntelEdge[];
+  frameworks: string[];
+}
+
+export interface AnalyzerPlugin {
+  name: string;
+  languages: string[];
+  extensions: string[];
+  /** Exact filenames to match (e.g., 'Dockerfile', 'docker-compose.yml') */
+  filenames?: string[];
+  /** Analyze a single file. rootDir provided for import resolution. */
+  analyzeFile(content: string, relPath: string, rootDir: string): FileAnalysis;
+  /** Optional: cross-file analysis after all files scanned */
+  analyzeProject?(allNodes: IntelNode[], allEdges: IntelEdge[], rootDir: string): ProjectAnalysisResult;
+}
diff --git a/src/intel/analyzers/cobol.test.ts b/src/intel/analyzers/cobol.test.ts
new file mode 100644
index 0000000..639b5ca
--- /dev/null
+++ b/src/intel/analyzers/cobol.test.ts
@@ -0,0 +1,230 @@
+import { describe, it, expect } from 'vitest';
+import { CobolAnalyzer } from './cobol.js';
+
+const analyzer = new CobolAnalyzer();
+
+// ── Metadata ───────────────────────────────────────────────────────────────
+
+describe('CobolAnalyzer — metadata', () => {
+  it('has correct name, language, and extensions', () => {
+    expect(analyzer.name).toBe('cobol');
+    expect(analyzer.languages).toContain('cobol');
+    expect(analyzer.extensions).toContain('.cbl');
+    expect(analyzer.extensions).toContain('.cob');
+    expect(analyzer.extensions).toContain('.cpy');
+    expect(analyzer.extensions).toContain('.CBL');
+    expect(analyzer.extensions).toContain('.COB');
+    expect(analyzer.extensions).toContain('.CPY');
+  });
+});
+
+// ── File node ──────────────────────────────────────────────────────────────
+
+describe('CobolAnalyzer — file node', () => {
+  it('creates a file node with language=cobol', () => {
+    const code = `       IDENTIFICATION DIVISION.\n       PROGRAM-ID. MYPROG.`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/MYPROG.cbl', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode).toBeDefined();
+    expect(fileNode!.language).toBe('cobol');
+    expect(fileNode!.filePath).toBe('src/MYPROG.cbl');
+  });
+
+  it('uses PROGRAM-ID as program name in file node', () => {
+    const code = `       PROGRAM-ID. PAYROLL.`;
+    const { nodes } = analyzer.analyzeFile(code, 'PAYROLL.cbl', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode!.name).toBe('PAYROLL');
+    expect(fileNode!.metadata['programId']).toBe('PAYROLL');
+  });
+
+  it('falls back to relPath as name when PROGRAM-ID absent', () => {
+    const { nodes } = analyzer.analyzeFile('* no program id', 'UTIL.cpy', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode!.name).toBe('UTIL.cpy');
+  });
+});
+
+// ── COPY → import edges ────────────────────────────────────────────────────
+
+describe('CobolAnalyzer — COPY (copybook) detection', () => {
+  it('creates import edge for COPY statement', () => {
+    const code = `       COPY CUSTDATA.`;
+    const { edges } = analyzer.analyzeFile(code, 'MAIN.cbl', '/root');
+    const importEdge = edges.find(e => e.type === 'imports');
+    expect(importEdge).toBeDefined();
+    expect(importEdge!.source).toBe('file:MAIN.cbl');
+    expect(importEdge!.target).toBe('file:CUSTDATA.');
+  });
+
+  it('handles multiple COPY statements', () => {
+    const code = `       COPY CUSTDATA.\n       COPY PRODTBL.`;
+    const { edges } = analyzer.analyzeFile(code, 'MAIN.cbl', '/root');
+    const importEdges = edges.filter(e => e.type === 'imports');
+    expect(importEdges).toHaveLength(2);
+  });
+});
+
+// ── CALL → calls edges ─────────────────────────────────────────────────────
+
+describe('CobolAnalyzer — CALL detection', () => {
+  it('creates calls edge for CALL statement', () => {
+    const code = `           CALL 'SUBPROG' USING WS-INPUT.`;
+    const { edges } = analyzer.analyzeFile(code, 'MAIN.cbl', '/root');
+    const callEdge = edges.find(e => e.type === 'calls');
+    expect(callEdge).toBeDefined();
+    expect(callEdge!.source).toBe('file:MAIN.cbl');
+    expect(callEdge!.target).toBe('file:SUBPROG');
+  });
+
+  it('handles CALL with double quotes', () => {
+    const code = `           CALL "UTILITY" USING DATA-AREA.`;
+    const { edges } = analyzer.analyzeFile(code, 'MAIN.cbl', '/root');
+    const callEdge = edges.find(e => e.type === 'calls');
+    expect(callEdge).toBeDefined();
+    expect(callEdge!.target).toBe('file:UTILITY');
+  });
+});
+
+// ── EXEC SQL ───────────────────────────────────────────────────────────────
+
+describe('CobolAnalyzer — EXEC SQL table detection', () => {
+  it('extracts table from SELECT ... FROM as reads edge', () => {
+    const code = `           EXEC SQL\n               SELECT * FROM CUSTOMERS\n           END-EXEC.`;
+    const { nodes, edges } = analyzer.analyzeFile(code, 'REPORT.cbl', '/root');
+    const tableNode = nodes.find(n => n.type === 'table' && n.name === 'CUSTOMERS');
+    expect(tableNode).toBeDefined();
+    const readsEdge = edges.find(e => e.type === 'reads' && e.target === 'table:CUSTOMERS');
+    expect(readsEdge).toBeDefined();
+  });
+
+  it('extracts table from INSERT INTO as writes edge', () => {
+    const code = `           EXEC SQL\n               INSERT INTO ORDERS (ID, AMOUNT) VALUES (:WS-ID, :WS-AMT)\n           END-EXEC.`;
+    const { nodes, edges } = analyzer.analyzeFile(code, 'ORDER.cbl', '/root');
+    const tableNode = nodes.find(n => n.type === 'table' && n.name === 'ORDERS');
+    expect(tableNode).toBeDefined();
+    const writesEdge = edges.find(e => e.type === 'writes' && e.target === 'table:ORDERS');
+    expect(writesEdge).toBeDefined();
+  });
+
+  it('extracts table from UPDATE as writes edge', () => {
+    const code = `           EXEC SQL\n               UPDATE ACCOUNTS SET BALANCE = :WS-BAL WHERE ID = :WS-ID\n           END-EXEC.`;
+    const { edges } = analyzer.analyzeFile(code, 'UPDATE.cbl', '/root');
+    const writesEdge = edges.find(e => e.type === 'writes' && e.target === 'table:ACCOUNTS');
+    expect(writesEdge).toBeDefined();
+  });
+
+  it('extracts table from DELETE FROM as writes edge', () => {
+    const code = `           EXEC SQL\n               DELETE FROM TEMP_DATA WHERE FLAG = 'Y'\n           END-EXEC.`;
+    const { edges } = analyzer.analyzeFile(code, 'CLEAN.cbl', '/root');
+    const writesEdge = edges.find(e => e.type === 'writes' && e.target === 'table:TEMP_DATA');
+    expect(writesEdge).toBeDefined();
+  });
+});
+
+// ── EXEC CICS ─────────────────────────────────────────────────────────────
+
+describe('CobolAnalyzer — EXEC CICS detection', () => {
+  it('marks file framework as cics when EXEC CICS is present', () => {
+    const code = `           EXEC CICS SEND TEXT FROM(WS-MSG) END-EXEC.`;
+    const { nodes } = analyzer.analyzeFile(code, 'SCREEN.cbl', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode!.framework).toBe('cics');
+  });
+
+  it('does not set cics framework when absent', () => {
+    const code = `       PROGRAM-ID. BATCH.`;
+    const { nodes } = analyzer.analyzeFile(code, 'BATCH.cbl', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode!.framework).toBeUndefined();
+  });
+});
+
+// ── SECTION nodes ──────────────────────────────────────────────────────────
+
+describe('CobolAnalyzer — SECTION detection', () => {
+  it('creates function nodes for SECTION paragraphs', () => {
+    const code = `       PROCEDURE DIVISION.\n       INIT-SECTION SECTION.\n           MOVE 0 TO WS-COUNT.`;
+    const { nodes } = analyzer.analyzeFile(code, 'PROG.cbl', '/root');
+    const section = nodes.find(n => n.type === 'function' && n.name === 'INIT-SECTION');
+    expect(section).toBeDefined();
+    expect(section!.language).toBe('cobol');
+  });
+
+  it('skips standard COBOL division names as sections', () => {
+    const code = `       PROCEDURE DIVISION.\n       DATA SECTION.`;
+    const { nodes } = analyzer.analyzeFile(code, 'PROG.cbl', '/root');
+    const dataSection = nodes.find(n => n.type === 'function' && n.name === 'DATA');
+    expect(dataSection).toBeUndefined();
+  });
+});
+
+// ── FD → external nodes ────────────────────────────────────────────────────
+
+describe('CobolAnalyzer — FD (file descriptor) detection', () => {
+  it('creates external node for FD declaration', () => {
+    const code = `       FILE SECTION.\n       FD CUSTOMER-FILE.`;
+    const { nodes } = analyzer.analyzeFile(code, 'REPORT.cbl', '/root');
+    const extNode = nodes.find(n => n.type === 'external' && n.name === 'CUSTOMER-FILE');
+    expect(extNode).toBeDefined();
+    expect(extNode!.metadata['fdType']).toBe('file-descriptor');
+  });
+});
+
+// ── Combined scenario ──────────────────────────────────────────────────────
+
+describe('CobolAnalyzer — combined scenario', () => {
+  it('handles a realistic COBOL program', () => {
+    const code = `
+       IDENTIFICATION DIVISION.
+       PROGRAM-ID. BILLING.
+
+       ENVIRONMENT DIVISION.
+       INPUT-OUTPUT SECTION.
+       FILE-CONTROL.
+           SELECT INVOICE-FILE ASSIGN TO 'INVOICES.DAT'.
+
+       DATA DIVISION.
+       FILE SECTION.
+       FD INVOICE-FILE.
+
+       WORKING-STORAGE SECTION.
+
+       PROCEDURE DIVISION.
+       MAIN-SECTION SECTION.
+           COPY CUSTDATA.
+           CALL 'TAXCALC' USING WS-AMOUNT.
+           EXEC SQL
+               SELECT * FROM INVOICES WHERE CUST_ID = :WS-ID
+           END-EXEC
+           EXEC SQL
+               INSERT INTO BILLING_LOG (ID, AMT) VALUES (:WS-ID, :WS-AMT)
+           END-EXEC
+           EXEC CICS RETURN END-EXEC.
+    `;
+    const { nodes, edges } = analyzer.analyzeFile(code, 'BILLING.cbl', '/root');
+
+    // File node with program name
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode!.name).toBe('BILLING');
+    expect(fileNode!.framework).toBe('cics');
+
+    // FD node
+    expect(nodes.find(n => n.type === 'external' && n.name === 'INVOICE-FILE')).toBeDefined();
+
+    // Section node
+    expect(nodes.find(n => n.type === 'function' && n.name === 'MAIN-SECTION')).toBeDefined();
+
+    // COPY edge
+    expect(edges.find(e => e.type === 'imports' && e.target === 'file:CUSTDATA.')).toBeDefined();
+
+    // CALL edge
+    expect(edges.find(e => e.type === 'calls' && e.target === 'file:TAXCALC')).toBeDefined();
+
+    // SQL table nodes and edges
+    expect(nodes.find(n => n.type === 'table' && n.name === 'INVOICES')).toBeDefined();
+    expect(nodes.find(n => n.type === 'table' && n.name === 'BILLING_LOG')).toBeDefined();
+    expect(edges.find(e => e.type === 'reads' && e.target === 'table:INVOICES')).toBeDefined();
+    expect(edges.find(e => e.type === 'writes' && e.target === 'table:BILLING_LOG')).toBeDefined();
+  });
+});
diff --git a/src/intel/analyzers/cobol.ts b/src/intel/analyzers/cobol.ts
new file mode 100644
index 0000000..90560b1
--- /dev/null
+++ b/src/intel/analyzers/cobol.ts
@@ -0,0 +1,180 @@
+import type { AnalyzerPlugin, FileAnalysis } from './base.js';
+import type { IntelNode, IntelEdge } from '../types.js';
+
+// PROGRAM-ID. NAME.
+const PROGRAM_ID_RE = /PROGRAM-ID\s*\.\s*(\S+?)\s*\./i;
+
+// COPY XXXX
+const COPY_RE = /^\s*COPY\s+(\S+)/gim;
+
+// CALL 'XXXX' or CALL "XXXX"
+const CALL_RE = /\bCALL\s+['"]([^'"]+)['"]/gi;
+
+// EXEC SQL ... END-EXEC (multiline)
+const EXEC_SQL_RE = /EXEC\s+SQL([\s\S]*?)END-EXEC/gi;
+
+// EXEC CICS ... END-EXEC
+const EXEC_CICS_RE = /EXEC\s+CICS/i;
+
+// SECTION names: "XXXX SECTION."
+const SECTION_RE = /^\s{0,8}(\S[\w-]+)\s+SECTION\s*\./gim;
+
+// File Descriptor: FD XXXX
+const FD_RE = /^\s*FD\s+(\S+)/gim;
+
+// SQL table extraction from SELECT/INSERT/UPDATE/DELETE
+function extractTablesFromSQL(sqlBody: string): Array<{ name: string; op: 'reads' | 'writes' }> {
+  const results: Array<{ name: string; op: 'reads' | 'writes' }> = [];
+
+  // SELECT ... FROM table
+  const selectRe = /\bFROM\s+(\w+)/gi;
+  let m: RegExpExecArray | null;
+  while ((m = selectRe.exec(sqlBody)) !== null) {
+    results.push({ name: m[1]!.toUpperCase(), op: 'reads' });
+  }
+
+  // Also JOIN ... ON
+  const joinRe = /\bJOIN\s+(\w+)/gi;
+  while ((m = joinRe.exec(sqlBody)) !== null) {
+    results.push({ name: m[1]!.toUpperCase(), op: 'reads' });
+  }
+
+  // INSERT INTO table
+  const insertRe = /\bINSERT\s+INTO\s+(\w+)/gi;
+  while ((m = insertRe.exec(sqlBody)) !== null) {
+    results.push({ name: m[1]!.toUpperCase(), op: 'writes' });
+  }
+
+  // UPDATE table
+  const updateRe = /\bUPDATE\s+(\w+)/gi;
+  while ((m = updateRe.exec(sqlBody)) !== null) {
+    results.push({ name: m[1]!.toUpperCase(), op: 'writes' });
+  }
+
+  // DELETE FROM table
+  const deleteRe = /\bDELETE\s+FROM\s+(\w+)/gi;
+  while ((m = deleteRe.exec(sqlBody)) !== null) {
+    results.push({ name: m[1]!.toUpperCase(), op: 'writes' });
+  }
+
+  return results;
+}
+
+export class CobolAnalyzer implements AnalyzerPlugin {
+  name = 'cobol';
+  languages = ['cobol'];
+  extensions = ['.cbl', '.cob', '.cpy', '.CBL', '.COB', '.CPY'];
+
+  analyzeFile(content: string, relPath: string, _rootDir: string): FileAnalysis {
+    const nodes: IntelNode[] = [];
+    const edges: IntelEdge[] = [];
+
+    const fileId = `file:${relPath}`;
+
+    // Detect CICS
+    const hasCics = EXEC_CICS_RE.test(content);
+    const fileFramework = hasCics ? 'cics' : undefined;
+
+    // Extract PROGRAM-ID
+    const programIdMatch = PROGRAM_ID_RE.exec(content);
+    const programName = programIdMatch ? programIdMatch[1]! : relPath;
+
+    // ── 1. File node ──────────────────────────────────────────────────────
+    const fileNode: IntelNode = {
+      id: fileId,
+      type: 'file',
+      name: programName,
+      filePath: relPath,
+      language: 'cobol',
+      metadata: { programId: programName },
+    };
+    if (fileFramework) fileNode.framework = fileFramework;
+    nodes.push(fileNode);
+
+    // ── 2. COPY → import edges ────────────────────────────────────────────
+    const copyPattern = new RegExp(COPY_RE.source, COPY_RE.flags);
+    let copyMatch: RegExpExecArray | null;
+    while ((copyMatch = copyPattern.exec(content)) !== null) {
+      const copybook = copyMatch[1]!;
+      const targetId = `file:${copybook}`;
+      edges.push({ source: fileId, target: targetId, type: 'imports' });
+    }
+
+    // ── 3. CALL → calls edges ─────────────────────────────────────────────
+    const callPattern = new RegExp(CALL_RE.source, CALL_RE.flags);
+    let callMatch: RegExpExecArray | null;
+    while ((callMatch = callPattern.exec(content)) !== null) {
+      const callee = callMatch[1]!;
+      const targetId = `file:${callee}`;
+      edges.push({ source: fileId, target: targetId, type: 'calls' });
+    }
+
+    // ── 4. EXEC SQL → table nodes + read/write edges ──────────────────────
+    const sqlPattern = new RegExp(EXEC_SQL_RE.source, EXEC_SQL_RE.flags);
+    let sqlMatch: RegExpExecArray | null;
+    const seenTables = new Set<string>();
+    while ((sqlMatch = sqlPattern.exec(content)) !== null) {
+      const sqlBody = sqlMatch[1]!;
+      const tableMentions = extractTablesFromSQL(sqlBody);
+      for (const { name, op } of tableMentions) {
+        if (!seenTables.has(name)) {
+          seenTables.add(name);
+          nodes.push({
+            id: `table:${name}`,
+            type: 'table',
+            name,
+            filePath: relPath,
+            metadata: {},
+          });
+        }
+        edges.push({ source: fileId, target: `table:${name}`, type: op });
+      }
+    }
+
+    // ── 5. SECTION nodes ──────────────────────────────────────────────────
+    const sectionPattern = new RegExp(SECTION_RE.source, SECTION_RE.flags);
+    let sectionMatch: RegExpExecArray | null;
+    const seenSections = new Set<string>();
+    while ((sectionMatch = sectionPattern.exec(content)) !== null) {
+      const sectionName = sectionMatch[1]!;
+      // Skip COBOL division names
+      if (['IDENTIFICATION', 'ENVIRONMENT', 'DATA', 'PROCEDURE', 'FILE', 'WORKING-STORAGE', 'LOCAL-STORAGE', 'LINKAGE'].includes(sectionName.toUpperCase())) continue;
+      if (seenSections.has(sectionName)) continue;
+      seenSections.add(sectionName);
+
+      const sectionId = `function:${sectionName}`;
+      nodes.push({
+        id: sectionId,
+        type: 'function',
+        name: sectionName,
+        filePath: relPath,
+        language: 'cobol',
+        metadata: { sectionType: 'SECTION' },
+      });
+      edges.push({ source: fileId, target: sectionId, type: 'contains' });
+    }
+
+    // ── 6. FD → external nodes ────────────────────────────────────────────
+    const fdPattern = new RegExp(FD_RE.source, FD_RE.flags);
+    let fdMatch: RegExpExecArray | null;
+    const seenFds = new Set<string>();
+    while ((fdMatch = fdPattern.exec(content)) !== null) {
+      const fdName = fdMatch[1]!.replace(/\.$/, '');
+      if (seenFds.has(fdName)) continue;
+      seenFds.add(fdName);
+
+      const fdId = `external:${fdName}`;
+      nodes.push({
+        id: fdId,
+        type: 'external',
+        name: fdName,
+        filePath: relPath,
+        language: 'cobol',
+        metadata: { fdType: 'file-descriptor' },
+      });
+      edges.push({ source: fileId, target: fdId, type: 'contains' });
+    }
+
+    return { nodes, edges };
+  }
+}
diff --git a/src/intel/analyzers/docker.test.ts b/src/intel/analyzers/docker.test.ts
new file mode 100644
index 0000000..06236ff
--- /dev/null
+++ b/src/intel/analyzers/docker.test.ts
@@ -0,0 +1,146 @@
+import { describe, it, expect } from 'vitest';
+import { DockerAnalyzer } from './docker.js';
+
+const analyzer = new DockerAnalyzer();
+
+// ── Metadata ───────────────────────────────────────────────────────────────
+
+describe('DockerAnalyzer — metadata', () => {
+  it('has correct name, language, empty extensions, and filenames', () => {
+    expect(analyzer.name).toBe('docker');
+    expect(analyzer.languages).toContain('docker');
+    expect(analyzer.extensions).toHaveLength(0);
+    expect(analyzer.filenames).toContain('Dockerfile');
+    expect(analyzer.filenames).toContain('docker-compose.yml');
+    expect(analyzer.filenames).toContain('docker-compose.yaml');
+    expect(analyzer.filenames).toContain('compose.yml');
+    expect(analyzer.filenames).toContain('compose.yaml');
+  });
+});
+
+// ── Dockerfile ─────────────────────────────────────────────────────────────
+
+describe('DockerAnalyzer — Dockerfile parsing', () => {
+  it('creates a file node with language=docker', () => {
+    const code = `FROM node:18\nRUN npm install`;
+    const { nodes } = analyzer.analyzeFile(code, 'Dockerfile', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode).toBeDefined();
+    expect(fileNode!.language).toBe('docker');
+    expect(fileNode!.id).toBe('file:Dockerfile');
+  });
+
+  it('creates external node for FROM base image', () => {
+    const code = `FROM node:18-alpine\nRUN npm ci`;
+    const { nodes } = analyzer.analyzeFile(code, 'Dockerfile', '/root');
+    const extNode = nodes.find(n => n.type === 'external' && n.name === 'node:18-alpine');
+    expect(extNode).toBeDefined();
+    expect(extNode!.metadata['imageType']).toBe('base-image');
+  });
+
+  it('creates depends-on edge from file to base image', () => {
+    const code = `FROM python:3.11`;
+    const { edges } = analyzer.analyzeFile(code, 'Dockerfile', '/root');
+    const edge = edges.find(e => e.type === 'depends-on' && e.target === 'external:python:3.11');
+    expect(edge).toBeDefined();
+    expect(edge!.source).toBe('file:Dockerfile');
+  });
+
+  it('handles multi-stage FROM (creates nodes for each unique image)', () => {
+    const code = `FROM node:18 AS builder\nFROM nginx:alpine\n`;
+    const { nodes } = analyzer.analyzeFile(code, 'Dockerfile', '/root');
+    const extNodes = nodes.filter(n => n.type === 'external');
+    expect(extNodes).toHaveLength(2);
+    expect(extNodes.map(n => n.name)).toContain('node:18');
+    expect(extNodes.map(n => n.name)).toContain('nginx:alpine');
+  });
+
+  it('stores EXPOSE ports in file node metadata', () => {
+    const code = `FROM node:18\nEXPOSE 3000 8080`;
+    const { nodes } = analyzer.analyzeFile(code, 'Dockerfile', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode!.metadata['exposedPorts']).toEqual(expect.arrayContaining(['3000', '8080']));
+  });
+
+  it('ignores FROM scratch', () => {
+    const code = `FROM scratch\nCOPY myapp /`;
+    const { nodes } = analyzer.analyzeFile(code, 'Dockerfile', '/root');
+    const extNodes = nodes.filter(n => n.type === 'external');
+    expect(extNodes).toHaveLength(0);
+  });
+});
+
+// ── docker-compose ─────────────────────────────────────────────────────────
+
+describe('DockerAnalyzer — docker-compose parsing', () => {
+  const basicCompose = `
+version: '3.8'
+services:
+  web:
+    image: nginx:alpine
+    ports:
+      - "80:80"
+    volumes:
+      - ./html:/usr/share/nginx/html
+  db:
+    image: postgres:15
+    ports:
+      - "5432:5432"
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+  app:
+    build: .
+    depends_on:
+      - db
+      - web
+`;
+
+  it('creates service nodes for each compose service', () => {
+    const { nodes } = analyzer.analyzeFile(basicCompose, 'docker-compose.yml', '/root');
+    const services = nodes.filter(n => n.type === 'service');
+    expect(services).toHaveLength(3);
+    expect(services.map(s => s.name)).toContain('web');
+    expect(services.map(s => s.name)).toContain('db');
+    expect(services.map(s => s.name)).toContain('app');
+  });
+
+  it('sets framework=docker-compose on service nodes', () => {
+    const { nodes } = analyzer.analyzeFile(basicCompose, 'docker-compose.yml', '/root');
+    const svc = nodes.find(n => n.type === 'service' && n.name === 'web');
+    expect(svc!.framework).toBe('docker-compose');
+  });
+
+  it('stores ports in service node metadata', () => {
+    const { nodes } = analyzer.analyzeFile(basicCompose, 'docker-compose.yml', '/root');
+    const webSvc = nodes.find(n => n.type === 'service' && n.name === 'web');
+    expect((webSvc!.metadata['ports'] as string[])).toContain('80:80');
+  });
+
+  it('stores volumes in service node metadata', () => {
+    const { nodes } = analyzer.analyzeFile(basicCompose, 'docker-compose.yml', '/root');
+    const dbSvc = nodes.find(n => n.type === 'service' && n.name === 'db');
+    expect(dbSvc!.metadata['volumes']).toBeDefined();
+    expect((dbSvc!.metadata['volumes'] as string[]).length).toBeGreaterThan(0);
+  });
+
+  it('creates deploys-with edges for depends_on', () => {
+    const { edges } = analyzer.analyzeFile(basicCompose, 'docker-compose.yml', '/root');
+    const depEdges = edges.filter(e => e.type === 'deploys-with');
+    expect(depEdges.some(e => e.source === 'service:app' && e.target === 'service:db')).toBe(true);
+    expect(depEdges.some(e => e.source === 'service:app' && e.target === 'service:web')).toBe(true);
+  });
+
+  it('creates contains edge from file to each service', () => {
+    const { edges } = analyzer.analyzeFile(basicCompose, 'docker-compose.yml', '/root');
+    const containsEdges = edges.filter(e => e.type === 'contains');
+    expect(containsEdges.some(e => e.source === 'file:docker-compose.yml' && e.target === 'service:web')).toBe(true);
+    expect(containsEdges.some(e => e.source === 'file:docker-compose.yml' && e.target === 'service:db')).toBe(true);
+  });
+
+  it('works with compose.yml filename', () => {
+    const code = `services:\n  api:\n    image: myapp:latest\n`;
+    const { nodes } = analyzer.analyzeFile(code, 'compose.yml', '/root');
+    const svc = nodes.find(n => n.type === 'service' && n.name === 'api');
+    expect(svc).toBeDefined();
+  });
+});
diff --git a/src/intel/analyzers/docker.ts b/src/intel/analyzers/docker.ts
new file mode 100644
index 0000000..afb9d1b
--- /dev/null
+++ b/src/intel/analyzers/docker.ts
@@ -0,0 +1,233 @@
+import { basename } from 'node:path';
+import type { AnalyzerPlugin, FileAnalysis } from './base.js';
+import type { IntelNode, IntelEdge } from '../types.js';
+
+const COMPOSE_FILENAMES = new Set([
+  'docker-compose.yml',
+  'docker-compose.yaml',
+  'compose.yml',
+  'compose.yaml',
+]);
+
+// FROM image:tag (handles multi-stage: FROM image AS alias)
+const FROM_RE = /^FROM\s+(\S+?)(?:\s+AS\s+\S+)?\s*$/im;
+const FROM_ALL_RE = /^FROM\s+(\S+?)(?:\s+AS\s+\S+)?\s*$/gim;
+
+// EXPOSE port
+const EXPOSE_RE = /^EXPOSE\s+([\d\s/tcp/udp]+)/gim;
+
+/**
+ * Simple indentation-based YAML parser for docker-compose files.
+ * Returns a map of service names to their key-value blocks (as raw strings per key).
+ */
+interface ServiceBlock {
+  dependsOn: string[];
+  ports: string[];
+  volumes: string[];
+  image?: string;
+}
+
+function parseComposeServices(content: string): Map<string, ServiceBlock> {
+  const services = new Map<string, ServiceBlock>();
+  const lines = content.split('\n');
+
+  let inServices = false;
+  let currentService: string | null = null;
+  let currentBlock: ServiceBlock | null = null;
+  let inDependsOn = false;
+  let inPorts = false;
+  let inVolumes = false;
+
+  for (const rawLine of lines) {
+    // Skip comments and empty lines for section detection
+    const trimmed = rawLine.trimEnd();
+
+    // Check for top-level 'services:' key (0-indent)
+    if (/^services\s*:/.test(trimmed)) {
+      inServices = true;
+      currentService = null;
+      currentBlock = null;
+      inDependsOn = false;
+      inPorts = false;
+      inVolumes = false;
+      continue;
+    }
+
+    if (!inServices) continue;
+
+    // Top-level key (not services, not indent) ends services block
+    if (/^\w/.test(trimmed) && !/^services\s*:/.test(trimmed)) {
+      if (currentService && currentBlock) {
+        services.set(currentService, currentBlock);
+      }
+      inServices = false;
+      continue;
+    }
+
+    // Service name: exactly 2-space or 4-space indent with key:
+    const serviceMatch = /^  (\w[\w-]*)\s*:/.exec(trimmed);
+    if (serviceMatch && !/^\s{4}/.test(trimmed)) {
+      // Save previous service
+      if (currentService && currentBlock) {
+        services.set(currentService, currentBlock);
+      }
+      currentService = serviceMatch[1]!;
+      currentBlock = { dependsOn: [], ports: [], volumes: [] };
+      inDependsOn = false;
+      inPorts = false;
+      inVolumes = false;
+      continue;
+    }
+
+    if (!currentService || !currentBlock) continue;
+
+    // Keys within a service (4-space indent)
+    const keyMatch = /^    (\w[\w_-]*)\s*:(.*)/.exec(trimmed);
+    if (keyMatch) {
+      const key = keyMatch[1]!.toLowerCase();
+      const value = keyMatch[2]!.trim();
+      inDependsOn = key === 'depends_on';
+      inPorts = key === 'ports';
+      inVolumes = key === 'volumes';
+
+      if (key === 'image') {
+        currentBlock.image = value;
+      } else if (inDependsOn && value) {
+        // inline: depends_on: [svcA, svcB]
+        const inlineItems = value.replace(/[\[\]]/g, '').split(',').map(s => s.trim()).filter(Boolean);
+        currentBlock.dependsOn.push(...inlineItems);
+      }
+      continue;
+    }
+
+    // List items under a service key (6-space indent)
+    const listItemMatch = /^      -\s+(.+)/.exec(trimmed);
+    if (listItemMatch) {
+      const item = listItemMatch[1]!.trim().replace(/^['"]|['"]$/g, '');
+      if (inDependsOn) currentBlock.dependsOn.push(item);
+      else if (inPorts) currentBlock.ports.push(item);
+      else if (inVolumes) currentBlock.volumes.push(item);
+    }
+  }
+
+  // Save last service
+  if (currentService && currentBlock) {
+    services.set(currentService, currentBlock);
+  }
+
+  return services;
+}
+
+export class DockerAnalyzer implements AnalyzerPlugin {
+  name = 'docker';
+  languages = ['docker'];
+  extensions = [];
+  filenames = ['Dockerfile', 'docker-compose.yml', 'docker-compose.yaml', 'compose.yml', 'compose.yaml'];
+
+  analyzeFile(content: string, relPath: string, _rootDir: string): FileAnalysis {
+    const nodes: IntelNode[] = [];
+    const edges: IntelEdge[] = [];
+
+    const filename = basename(relPath);
+    const fileId = `file:${relPath}`;
+
+    // ── File node ────────────────────────────────────────────────────────
+    nodes.push({
+      id: fileId,
+      type: 'file',
+      name: relPath,
+      filePath: relPath,
+      language: 'docker',
+      metadata: {},
+    });
+
+    if (filename === 'Dockerfile' || filename.startsWith('Dockerfile.')) {
+      this.analyzeDockerfile(content, relPath, fileId, nodes, edges);
+    } else if (COMPOSE_FILENAMES.has(filename)) {
+      this.analyzeCompose(content, relPath, fileId, nodes, edges);
+    }
+
+    return { nodes, edges };
+  }
+
+  private analyzeDockerfile(
+    content: string,
+    relPath: string,
+    fileId: string,
+    nodes: IntelNode[],
+    edges: IntelEdge[],
+  ): void {
+    // FROM instructions → external nodes
+    const fromPattern = new RegExp(FROM_ALL_RE.source, FROM_ALL_RE.flags);
+    let fromMatch: RegExpExecArray | null;
+    const seenImages = new Set<string>();
+    while ((fromMatch = fromPattern.exec(content)) !== null) {
+      const image = fromMatch[1]!;
+      if (image.toUpperCase() === 'SCRATCH') continue;
+      if (seenImages.has(image)) continue;
+      seenImages.add(image);
+
+      const imageId = `external:${image}`;
+      nodes.push({
+        id: imageId,
+        type: 'external',
+        name: image,
+        filePath: relPath,
+        metadata: { imageType: 'base-image' },
+      });
+      edges.push({ source: fileId, target: imageId, type: 'depends-on' });
+    }
+
+    // EXPOSE instructions → metadata on file node
+    const exposedPorts: string[] = [];
+    const exposePattern = new RegExp(EXPOSE_RE.source, EXPOSE_RE.flags);
+    let exposeMatch: RegExpExecArray | null;
+    while ((exposeMatch = exposePattern.exec(content)) !== null) {
+      exposedPorts.push(...exposeMatch[1]!.trim().split(/\s+/));
+    }
+
+    if (exposedPorts.length > 0) {
+      const fileNode = nodes.find(n => n.id === fileId);
+      if (fileNode) fileNode.metadata['exposedPorts'] = exposedPorts;
+    }
+  }
+
+  private analyzeCompose(
+    content: string,
+    relPath: string,
+    fileId: string,
+    nodes: IntelNode[],
+    edges: IntelEdge[],
+  ): void {
+    const services = parseComposeServices(content);
+
+    for (const [serviceName, block] of services) {
+      const serviceId = `service:${serviceName}`;
+      nodes.push({
+        id: serviceId,
+        type: 'service',
+        name: serviceName,
+        filePath: relPath,
+        framework: 'docker-compose',
+        metadata: {
+          ports: block.ports,
+          volumes: block.volumes,
+          ...(block.image ? { image: block.image } : {}),
+        },
+      });
+      edges.push({ source: fileId, target: serviceId, type: 'contains' });
+    }
+
+    // depends_on → deploys-with edges (after all service nodes created)
+    for (const [serviceName, block] of services) {
+      const serviceId = `service:${serviceName}`;
+      for (const dep of block.dependsOn) {
+        edges.push({
+          source: serviceId,
+          target: `service:${dep}`,
+          type: 'deploys-with',
+        });
+      }
+    }
+  }
+}
diff --git a/src/intel/analyzers/openapi.test.ts b/src/intel/analyzers/openapi.test.ts
new file mode 100644
index 0000000..b1a64a7
--- /dev/null
+++ b/src/intel/analyzers/openapi.test.ts
@@ -0,0 +1,196 @@
+import { describe, it, expect } from 'vitest';
+import { OpenApiAnalyzer } from './openapi.js';
+
+const analyzer = new OpenApiAnalyzer();
+
+// ── Metadata ───────────────────────────────────────────────────────────────
+
+describe('OpenApiAnalyzer — metadata', () => {
+  it('has correct name, language, and extensions', () => {
+    expect(analyzer.name).toBe('openapi');
+    expect(analyzer.languages).toContain('openapi');
+    expect(analyzer.extensions).toContain('.yaml');
+    expect(analyzer.extensions).toContain('.yml');
+  });
+});
+
+// ── Guard: non-OpenAPI YAML files should return empty ──────────────────────
+
+describe('OpenApiAnalyzer — guard clause', () => {
+  it('returns empty analysis for plain YAML without openapi/swagger key', () => {
+    const code = `name: my-project\nversion: 1.0.0\nconfig:\n  port: 3000\n`;
+    const { nodes, edges } = analyzer.analyzeFile(code, 'config.yml', '/root');
+    expect(nodes).toHaveLength(0);
+    expect(edges).toHaveLength(0);
+  });
+
+  it('analyzes file with openapi: key in first 10 lines', () => {
+    const code = `openapi: '3.0.0'\ninfo:\n  title: Test\n`;
+    const { nodes } = analyzer.analyzeFile(code, 'api.yml', '/root');
+    expect(nodes.length).toBeGreaterThan(0);
+  });
+
+  it('analyzes file with swagger: key (Swagger 2.0)', () => {
+    const code = `swagger: '2.0'\ninfo:\n  title: Test\n`;
+    const { nodes } = analyzer.analyzeFile(code, 'api.yaml', '/root');
+    expect(nodes.length).toBeGreaterThan(0);
+  });
+});
+
+// ── File node ──────────────────────────────────────────────────────────────
+
+describe('OpenApiAnalyzer — file node', () => {
+  it('creates a file node with language=openapi', () => {
+    const code = `openapi: '3.0.0'\ninfo:\n  title: Test\n`;
+    const { nodes } = analyzer.analyzeFile(code, 'api/openapi.yaml', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode).toBeDefined();
+    expect(fileNode!.id).toBe('file:api/openapi.yaml');
+    expect(fileNode!.language).toBe('openapi');
+  });
+});
+
+// ── Endpoints from paths: ──────────────────────────────────────────────────
+
+describe('OpenApiAnalyzer — endpoint detection', () => {
+  const oa3Spec = `
+openapi: '3.0.0'
+info:
+  title: Users API
+  version: '1.0'
+paths:
+  /users:
+    get:
+      summary: List users
+      responses:
+        '200':
+          description: OK
+    post:
+      summary: Create user
+      responses:
+        '201':
+          description: Created
+  /users/{id}:
+    get:
+      summary: Get user
+    put:
+      summary: Update user
+    delete:
+      summary: Delete user
+`;
+
+  it('creates endpoint nodes from paths: block', () => {
+    const { nodes } = analyzer.analyzeFile(oa3Spec, 'api.yaml', '/root');
+    const endpoints = nodes.filter(n => n.type === 'endpoint');
+    expect(endpoints.length).toBeGreaterThanOrEqual(4);
+  });
+
+  it('endpoint node has correct name format METHOD /path', () => {
+    const { nodes } = analyzer.analyzeFile(oa3Spec, 'api.yaml', '/root');
+    const getUsers = nodes.find(n => n.type === 'endpoint' && n.name === 'GET /users');
+    expect(getUsers).toBeDefined();
+    expect(getUsers!.id).toBe('endpoint:GET /users');
+  });
+
+  it('detects POST endpoint', () => {
+    const { nodes } = analyzer.analyzeFile(oa3Spec, 'api.yaml', '/root');
+    const post = nodes.find(n => n.type === 'endpoint' && n.name === 'POST /users');
+    expect(post).toBeDefined();
+  });
+
+  it('detects DELETE endpoint', () => {
+    const { nodes } = analyzer.analyzeFile(oa3Spec, 'api.yaml', '/root');
+    const del = nodes.find(n => n.type === 'endpoint' && n.name === 'DELETE /users/{id}');
+    expect(del).toBeDefined();
+  });
+
+  it('sets language=openapi on endpoint nodes', () => {
+    const { nodes } = analyzer.analyzeFile(oa3Spec, 'api.yaml', '/root');
+    const endpoint = nodes.find(n => n.type === 'endpoint');
+    expect(endpoint!.language).toBe('openapi');
+  });
+
+  it('creates contains edges from file to endpoints', () => {
+    const { edges } = analyzer.analyzeFile(oa3Spec, 'api.yaml', '/root');
+    const containsEdge = edges.find(e => e.type === 'contains' && e.target === 'endpoint:GET /users');
+    expect(containsEdge).toBeDefined();
+    expect(containsEdge!.source).toBe('file:api.yaml');
+  });
+});
+
+// ── Components/definitions schemas ─────────────────────────────────────────
+
+describe('OpenApiAnalyzer — schema detection', () => {
+  const oa3WithSchemas = `
+openapi: '3.0.0'
+info:
+  title: API
+paths:
+  /users:
+    get:
+      summary: List
+components:
+  schemas:
+    User:
+      type: object
+      properties:
+        id:
+          type: string
+        address:
+          $ref: '#/components/schemas/Address'
+    Address:
+      type: object
+      properties:
+        street:
+          type: string
+`;
+
+  it('creates schema nodes from components/schemas', () => {
+    const { nodes } = analyzer.analyzeFile(oa3WithSchemas, 'api.yaml', '/root');
+    const schemas = nodes.filter(n => n.type === 'schema');
+    expect(schemas.length).toBeGreaterThanOrEqual(2);
+    expect(schemas.map(s => s.name)).toContain('User');
+    expect(schemas.map(s => s.name)).toContain('Address');
+  });
+
+  it('creates depends-on edges for $ref between schemas', () => {
+    const { edges } = analyzer.analyzeFile(oa3WithSchemas, 'api.yaml', '/root');
+    const refEdge = edges.find(
+      e => e.type === 'depends-on' && e.source === 'schema:User' && e.target === 'schema:Address'
+    );
+    expect(refEdge).toBeDefined();
+  });
+});
+
+// ── Swagger 2.0 definitions ────────────────────────────────────────────────
+
+describe('OpenApiAnalyzer — Swagger 2.0 definitions', () => {
+  const swagger2 = `
+swagger: '2.0'
+info:
+  title: Legacy API
+  version: '1.0'
+paths:
+  /items:
+    get:
+      summary: List items
+definitions:
+  Item:
+    type: object
+    properties:
+      id:
+        type: integer
+`;
+
+  it('creates schema nodes from definitions: block', () => {
+    const { nodes } = analyzer.analyzeFile(swagger2, 'swagger.yaml', '/root');
+    const schema = nodes.find(n => n.type === 'schema' && n.name === 'Item');
+    expect(schema).toBeDefined();
+  });
+
+  it('creates endpoint from swagger 2.0 paths', () => {
+    const { nodes } = analyzer.analyzeFile(swagger2, 'swagger.yaml', '/root');
+    const endpoint = nodes.find(n => n.type === 'endpoint' && n.name === 'GET /items');
+    expect(endpoint).toBeDefined();
+  });
+});
diff --git a/src/intel/analyzers/openapi.ts b/src/intel/analyzers/openapi.ts
new file mode 100644
index 0000000..47da386
--- /dev/null
+++ b/src/intel/analyzers/openapi.ts
@@ -0,0 +1,191 @@
+import type { AnalyzerPlugin, FileAnalysis } from './base.js';
+import type { IntelNode, IntelEdge } from '../types.js';
+
+/**
+ * Simple line-by-line YAML parser for OpenAPI/Swagger files.
+ * Detects endpoints from `paths:`, schemas from `components:/definitions:`,
+ * and $ref references between schemas.
+ */
+
+// HTTP methods recognized in OpenAPI paths blocks
+const HTTP_METHODS = new Set(['get', 'post', 'put', 'patch', 'delete', 'head', 'options', 'trace']);
+
+// $ref pattern: $ref: '#/components/schemas/Foo' or $ref: '#/definitions/Bar'
+const REF_RE = /\$ref\s*:\s*['"]?#\/(?:components\/schemas|definitions)\/(\w+)['"]?/g;
+
+function getIndent(line: string): number {
+  let i = 0;
+  while (i < line.length && line[i] === ' ') i++;
+  return i;
+}
+
+function getKey(line: string): string | null {
+  const trimmed = line.trim();
+  const colonIdx = trimmed.indexOf(':');
+  if (colonIdx === -1) return null;
+  return trimmed.slice(0, colonIdx).trim();
+}
+
+export class OpenApiAnalyzer implements AnalyzerPlugin {
+  name = 'openapi';
+  languages = ['openapi'];
+  extensions = ['.yaml', '.yml'];
+
+  analyzeFile(content: string, relPath: string, _rootDir: string): FileAnalysis {
+    const nodes: IntelNode[] = [];
+    const edges: IntelEdge[] = [];
+
+    // ── Guard: only handle OpenAPI/Swagger files ──────────────────────────
+    const firstLines = content.split('\n').slice(0, 10).join('\n');
+    const isOpenApi = /^openapi\s*:/m.test(firstLines) || /^swagger\s*:/m.test(firstLines);
+    if (!isOpenApi) {
+      return { nodes: [], edges: [] };
+    }
+
+    const fileId = `file:${relPath}`;
+
+    // ── 1. File node ──────────────────────────────────────────────────────
+    nodes.push({
+      id: fileId,
+      type: 'file',
+      name: relPath,
+      filePath: relPath,
+      language: 'openapi',
+      metadata: {},
+    });
+
+    const lines = content.split('\n');
+
+    // ── 2. Parse paths: → endpoint nodes ─────────────────────────────────
+    // State machine: track when we're inside paths: block
+    let inPaths = false;
+    let inComponents = false;
+    let inDefinitions = false;
+    let pathsIndent = -1;
+    let currentPath: string | null = null;
+    let currentPathIndent = -1;
+    let componentsIndent = -1;
+    let schemasIndent = -1;
+
+    // Schema $ref tracking for depends-on edges
+    // We need to track which schema is currently being defined
+    let currentSchema: string | null = null;
+    let currentSchemaIndent = -1;
+
+    for (let i = 0; i < lines.length; i++) {
+      const line = lines[i]!;
+      const trimmed = line.trim();
+
+      if (!trimmed || trimmed.startsWith('#')) continue;
+
+      const indent = getIndent(line);
+      const key = getKey(line);
+      if (!key) continue;
+
+      // Top-level keys
+      if (indent === 0) {
+        inPaths = key === 'paths';
+        inComponents = key === 'components';
+        inDefinitions = key === 'definitions';
+        pathsIndent = inPaths ? 0 : -1;
+        componentsIndent = inComponents ? 0 : -1;
+        currentPath = null;
+        currentSchema = null;
+        schemasIndent = -1;
+        if (!inPaths && !inComponents && !inDefinitions) continue;
+      }
+
+      // Inside paths block
+      if (inPaths) {
+        // A path entry: key starts with '/' at indent=2
+        if (indent === 2 && key.startsWith('/')) {
+          currentPath = key;
+          currentPathIndent = indent;
+          continue;
+        }
+
+        // HTTP method under a path at indent=4
+        if (currentPath && indent === 4 && HTTP_METHODS.has(key.toLowerCase())) {
+          const method = key.toUpperCase();
+          const routeName = `${method} ${currentPath}`;
+          const endpointId = `endpoint:${routeName}`;
+          nodes.push({
+            id: endpointId,
+            type: 'endpoint',
+            name: routeName,
+            filePath: relPath,
+            language: 'openapi',
+            metadata: { method, path: currentPath },
+          });
+          edges.push({ source: fileId, target: endpointId, type: 'contains' });
+        }
+      }
+
+      // Inside components: block — look for schemas: sub-key
+      if (inComponents) {
+        if (indent === 2 && key === 'schemas') {
+          schemasIndent = indent;
+          currentSchema = null;
+          continue;
+        }
+
+        // Schema name at indent=4 under schemas:
+        if (schemasIndent !== -1 && indent === 4) {
+          currentSchema = key;
+          currentSchemaIndent = indent;
+          const schemaId = `schema:${key}`;
+          // Only create node if not already there
+          if (!nodes.find(n => n.id === schemaId)) {
+            nodes.push({
+              id: schemaId,
+              type: 'schema',
+              name: key,
+              filePath: relPath,
+              language: 'openapi',
+              metadata: {},
+            });
+            edges.push({ source: fileId, target: schemaId, type: 'contains' });
+          }
+        }
+      }
+
+      // Inside definitions: (Swagger 2.0)
+      if (inDefinitions) {
+        if (indent === 2) {
+          currentSchema = key;
+          currentSchemaIndent = indent;
+          const schemaId = `schema:${key}`;
+          if (!nodes.find(n => n.id === schemaId)) {
+            nodes.push({
+              id: schemaId,
+              type: 'schema',
+              name: key,
+              filePath: relPath,
+              language: 'openapi',
+              metadata: {},
+            });
+            edges.push({ source: fileId, target: schemaId, type: 'contains' });
+          }
+        }
+      }
+
+      // $ref in any line → depends-on edge from current schema
+      if (trimmed.includes('$ref') && currentSchema) {
+        const refPattern = new RegExp(REF_RE.source, REF_RE.flags);
+        let refMatch: RegExpExecArray | null;
+        while ((refMatch = refPattern.exec(trimmed)) !== null) {
+          const referencedSchema = refMatch[1]!;
+          if (referencedSchema !== currentSchema) {
+            edges.push({
+              source: `schema:${currentSchema}`,
+              target: `schema:${referencedSchema}`,
+              type: 'depends-on',
+            });
+          }
+        }
+      }
+    }
+
+    return { nodes, edges };
+  }
+}
diff --git a/src/intel/analyzers/python.test.ts b/src/intel/analyzers/python.test.ts
new file mode 100644
index 0000000..165e048
--- /dev/null
+++ b/src/intel/analyzers/python.test.ts
@@ -0,0 +1,259 @@
+import { describe, it, expect } from 'vitest';
+import { PythonAnalyzer } from './python.js';
+
+const analyzer = new PythonAnalyzer();
+
+// ── Metadata ───────────────────────────────────────────────────────────────
+
+describe('PythonAnalyzer — metadata', () => {
+  it('has correct name, language, and extensions', () => {
+    expect(analyzer.name).toBe('python');
+    expect(analyzer.languages).toContain('python');
+    expect(analyzer.extensions).toContain('.py');
+  });
+});
+
+// ── File node ──────────────────────────────────────────────────────────────
+
+describe('PythonAnalyzer — file node', () => {
+  it('creates a file node with language=python', () => {
+    const { nodes } = analyzer.analyzeFile('x = 1', 'app/main.py', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode).toBeDefined();
+    expect(fileNode!.id).toBe('file:app/main.py');
+    expect(fileNode!.language).toBe('python');
+    expect(fileNode!.filePath).toBe('app/main.py');
+  });
+});
+
+// ── Relative imports ───────────────────────────────────────────────────────
+
+describe('PythonAnalyzer — relative imports', () => {
+  it('extracts relative import edge for "from .module import X"', () => {
+    const code = `from .utils import helper`;
+    const { edges } = analyzer.analyzeFile(code, 'app/views.py', '/root');
+    const importEdge = edges.find(e => e.type === 'imports');
+    expect(importEdge).toBeDefined();
+    expect(importEdge!.source).toBe('file:app/views.py');
+    expect(importEdge!.target).toBe('file:.utils');
+  });
+
+  it('extracts relative import edge for "from ..models import User"', () => {
+    const code = `from ..models import User`;
+    const { edges } = analyzer.analyzeFile(code, 'app/views/user.py', '/root');
+    const importEdge = edges.find(e => e.type === 'imports');
+    expect(importEdge).toBeDefined();
+    expect(importEdge!.target).toBe('file:..models');
+  });
+
+  it('ignores absolute (non-relative) imports', () => {
+    const code = `import os\nimport django.conf\nfrom flask import Flask`;
+    const { edges } = analyzer.analyzeFile(code, 'app/main.py', '/root');
+    const importEdges = edges.filter(e => e.type === 'imports');
+    expect(importEdges).toHaveLength(0);
+  });
+});
+
+// ── Class nodes ────────────────────────────────────────────────────────────
+
+describe('PythonAnalyzer — class nodes', () => {
+  it('creates a class node for exported (non-underscore) class', () => {
+    const code = `class UserService:\n    pass`;
+    const { nodes } = analyzer.analyzeFile(code, 'app/services.py', '/root');
+    const cls = nodes.find(n => n.type === 'class' && n.name === 'UserService');
+    expect(cls).toBeDefined();
+    expect(cls!.id).toBe('class:UserService');
+    expect(cls!.language).toBe('python');
+  });
+
+  it('skips private class (underscore prefix)', () => {
+    const code = `class _InternalHelper:\n    pass`;
+    const { nodes } = analyzer.analyzeFile(code, 'app/util.py', '/root');
+    const cls = nodes.find(n => n.type === 'class');
+    expect(cls).toBeUndefined();
+  });
+});
+
+// ── Function nodes ─────────────────────────────────────────────────────────
+
+describe('PythonAnalyzer — function nodes', () => {
+  it('creates function nodes for top-level public functions', () => {
+    const code = `def get_user(user_id):\n    pass\n\ndef _helper():\n    pass`;
+    const { nodes } = analyzer.analyzeFile(code, 'app/utils.py', '/root');
+    const fns = nodes.filter(n => n.type === 'function');
+    expect(fns).toHaveLength(1);
+    expect(fns[0]!.name).toBe('get_user');
+  });
+
+  it('skips private functions (underscore prefix)', () => {
+    const code = `def _private():\n    pass`;
+    const { nodes } = analyzer.analyzeFile(code, 'app/util.py', '/root');
+    const fns = nodes.filter(n => n.type === 'function');
+    expect(fns).toHaveLength(0);
+  });
+});
+
+// ── Flask routes ───────────────────────────────────────────────────────────
+
+describe('PythonAnalyzer — Flask route detection', () => {
+  it('detects @app.route as endpoint node with framework=flask', () => {
+    const code = `@app.route('/users')\ndef list_users():\n    pass`;
+    const { nodes } = analyzer.analyzeFile(code, 'app/views.py', '/root');
+    const endpoint = nodes.find(n => n.type === 'endpoint');
+    expect(endpoint).toBeDefined();
+    expect(endpoint!.framework).toBe('flask');
+    expect(endpoint!.name).toBe('GET /users');
+    expect(endpoint!.id).toBe('endpoint:GET /users');
+  });
+
+  it('detects @blueprint.route with explicit methods', () => {
+    const code = `@users_bp.route('/users', methods=['GET', 'POST'])\ndef users():\n    pass`;
+    const { nodes } = analyzer.analyzeFile(code, 'app/views.py', '/root');
+    const endpoints = nodes.filter(n => n.type === 'endpoint');
+    expect(endpoints).toHaveLength(2);
+    const names = endpoints.map(e => e.name);
+    expect(names).toContain('GET /users');
+    expect(names).toContain('POST /users');
+  });
+
+  it('sets filePath on Flask endpoint node', () => {
+    const code = `@app.route('/health')\ndef health():\n    pass`;
+    const { nodes } = analyzer.analyzeFile(code, 'app/api.py', '/root');
+    const endpoint = nodes.find(n => n.type === 'endpoint');
+    expect(endpoint!.filePath).toBe('app/api.py');
+  });
+});
+
+// ── Django URL patterns ────────────────────────────────────────────────────
+
+describe('PythonAnalyzer — Django URL detection', () => {
+  it('detects path() in urls.py as endpoint node with framework=django', () => {
+    const code = `urlpatterns = [\n    path('users/', views.UserListView.as_view(), name='user-list'),\n]`;
+    const { nodes } = analyzer.analyzeFile(code, 'app/urls.py', '/root');
+    const endpoint = nodes.find(n => n.type === 'endpoint');
+    expect(endpoint).toBeDefined();
+    expect(endpoint!.framework).toBe('django');
+    expect(endpoint!.name).toBe('GET users/');
+  });
+
+  it('ignores path() in non-urls.py files', () => {
+    const code = `path('users/', views.UserListView.as_view())`;
+    const { nodes } = analyzer.analyzeFile(code, 'app/views.py', '/root');
+    const endpoints = nodes.filter(n => n.type === 'endpoint' && n.framework === 'django');
+    expect(endpoints).toHaveLength(0);
+  });
+});
+
+// ── SQLAlchemy models ──────────────────────────────────────────────────────
+
+describe('PythonAnalyzer — SQLAlchemy model detection', () => {
+  it('detects class inheriting Base as table node', () => {
+    const code = `class User(Base):\n    __tablename__ = 'users'\n    id = Column(Integer, primary_key=True)\n    name = Column(String)`;
+    const { nodes } = analyzer.analyzeFile(code, 'app/models.py', '/root');
+    const tableNode = nodes.find(n => n.type === 'table' && n.name === 'User');
+    expect(tableNode).toBeDefined();
+    expect(tableNode!.framework).toBe('sqlalchemy');
+  });
+
+  it('detects class inheriting db.Model as table node', () => {
+    const code = `class Product(db.Model):\n    id = Column(Integer, primary_key=True)\n    price = Column(Float)`;
+    const { nodes } = analyzer.analyzeFile(code, 'app/models.py', '/root');
+    const tableNode = nodes.find(n => n.type === 'table' && n.name === 'Product');
+    expect(tableNode).toBeDefined();
+    expect(tableNode!.framework).toBe('sqlalchemy');
+  });
+
+  it('does NOT create regular class node for SQLAlchemy model', () => {
+    const code = `class Order(Base):\n    pass`;
+    const { nodes } = analyzer.analyzeFile(code, 'app/models.py', '/root');
+    const classNode = nodes.find(n => n.type === 'class' && n.name === 'Order');
+    expect(classNode).toBeUndefined();
+  });
+});
+
+// ── Airflow detection ──────────────────────────────────────────────────────
+
+describe('PythonAnalyzer — Airflow detection', () => {
+  it('marks file framework as airflow when @dag decorator is used', () => {
+    const code = `from airflow.decorators import dag\n\n@dag\ndef my_pipeline():\n    pass`;
+    const { nodes } = analyzer.analyzeFile(code, 'dags/pipeline.py', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode!.framework).toBe('airflow');
+  });
+
+  it('marks file framework as airflow when DAG() constructor is used', () => {
+    const code = `from airflow import DAG\ndag = DAG('my_dag', schedule_interval='@daily')`;
+    const { nodes } = analyzer.analyzeFile(code, 'dags/etl.py', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode!.framework).toBe('airflow');
+  });
+});
+
+// ── Spark detection ────────────────────────────────────────────────────────
+
+describe('PythonAnalyzer — Spark detection', () => {
+  it('marks file framework as spark when SparkSession is referenced', () => {
+    const code = `from pyspark.sql import SparkSession\nspark = SparkSession.builder.getOrCreate()`;
+    const { nodes } = analyzer.analyzeFile(code, 'jobs/etl.py', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode!.framework).toBe('spark');
+  });
+});
+
+// ── Config nodes ───────────────────────────────────────────────────────────
+
+describe('PythonAnalyzer — config node detection', () => {
+  it('detects os.environ["KEY"] as config node', () => {
+    const code = `import os\ndb_url = os.environ['DATABASE_URL']`;
+    const { nodes } = analyzer.analyzeFile(code, 'app/config.py', '/root');
+    const cfg = nodes.find(n => n.type === 'config' && n.name === 'DATABASE_URL');
+    expect(cfg).toBeDefined();
+    expect(cfg!.id).toBe('config:DATABASE_URL');
+  });
+
+  it('detects os.getenv("KEY") as config node', () => {
+    const code = `import os\nsecret = os.getenv('JWT_SECRET')`;
+    const { nodes } = analyzer.analyzeFile(code, 'app/config.py', '/root');
+    const cfg = nodes.find(n => n.type === 'config' && n.name === 'JWT_SECRET');
+    expect(cfg).toBeDefined();
+  });
+
+  it('deduplicates repeated env var accesses', () => {
+    const code = `os.environ['PORT']\nos.getenv('PORT')`;
+    const { nodes } = analyzer.analyzeFile(code, 'app/server.py', '/root');
+    const cfgNodes = nodes.filter(n => n.type === 'config' && n.name === 'PORT');
+    expect(cfgNodes).toHaveLength(1);
+  });
+});
+
+// ── Combined scenario ──────────────────────────────────────────────────────
+
+describe('PythonAnalyzer — combined scenario', () => {
+  it('handles a realistic Flask app file', () => {
+    const code = `
+from flask import Flask
+from .models import User
+
+app = Flask(__name__)
+
+class UserService:
+    def get_all(self):
+        return []
+
+@app.route('/api/users', methods=['GET', 'POST'])
+def users():
+    db_url = os.environ['DATABASE_URL']
+    return []
+`;
+    const { nodes, edges } = analyzer.analyzeFile(code, 'app/views.py', '/root');
+
+    expect(nodes.find(n => n.id === 'file:app/views.py')).toBeDefined();
+    expect(nodes.find(n => n.type === 'class' && n.name === 'UserService')).toBeDefined();
+    const endpoints = nodes.filter(n => n.type === 'endpoint');
+    expect(endpoints).toHaveLength(2);
+    expect(nodes.find(n => n.type === 'config' && n.name === 'DATABASE_URL')).toBeDefined();
+    const importEdges = edges.filter(e => e.type === 'imports');
+    expect(importEdges).toHaveLength(1);
+    expect(importEdges[0]!.target).toBe('file:.models');
+  });
+});
diff --git a/src/intel/analyzers/python.ts b/src/intel/analyzers/python.ts
new file mode 100644
index 0000000..94e94b3
--- /dev/null
+++ b/src/intel/analyzers/python.ts
@@ -0,0 +1,240 @@
+import type { AnalyzerPlugin, FileAnalysis } from './base.js';
+import type { IntelNode, IntelEdge } from '../types.js';
+
+// Relative import patterns: `import .foo` or `from .foo import bar`
+const RELATIVE_IMPORT_RE = /^(?:from\s+(\.[\w.]*)\s+import|import\s+(\.[\w.]*))/gm;
+
+// Class definition
+const CLASS_RE = /^class\s+(\w+)\s*(?:\(([^)]*)\))?:/gm;
+// Function definition (top-level and class methods)
+const FUNC_RE = /^(?:    )?def\s+(\w+)\s*\(/gm;
+
+// Flask route: @app.route('/path') or @blueprint.route('/path', methods=[...])
+const FLASK_ROUTE_RE = /@(?:\w+)\.route\s*\(\s*['"]([^'"]+)['"]\s*(?:,\s*methods\s*=\s*\[([^\]]*)\])?\s*\)/g;
+
+// Django urls.py: path('url', view) or re_path('regex', view)
+const DJANGO_PATH_RE = /(?:re_)?path\s*\(\s*['"r]([^'"]*)['"]\s*,/g;
+
+// SQLAlchemy model: class X(Base): or class X(db.Model):
+const SQLA_MODEL_RE = /^class\s+(\w+)\s*\(\s*(?:Base|db\.Model)\s*\)/gm;
+// SQLAlchemy column
+const SQLA_COLUMN_RE = /(\w+)\s*=\s*(?:db\.)?Column\s*\(/g;
+
+// Airflow
+const AIRFLOW_DAG_RE = /@dag\b|DAG\s*\(/g;
+
+// Spark
+const SPARK_IMPORT_RE = /from\s+pyspark|import\s+pyspark|SparkSession/g;
+
+// os.environ / os.getenv config access
+const OS_ENV_RE = /os\.environ\s*\[\s*['"]([^'"]+)['"]\s*\]|os\.getenv\s*\(\s*['"]([^'"]+)['"]/g;
+
+function extractMethods(lines: string[], classStartLine: number): Array<{ name: string; line: number }> {
+  const methods: Array<{ name: string; line: number }> = [];
+  // Look for indented def inside class body
+  for (let i = classStartLine + 1; i < lines.length; i++) {
+    const line = lines[i]!;
+    // Stop if we hit another top-level class or def (no indent)
+    if (line.length > 0 && line[0] !== ' ' && line[0] !== '\t' && !line.startsWith('#')) {
+      break;
+    }
+    const m = /^\s{4,}def\s+(\w+)\s*\(/.exec(line);
+    if (m) {
+      methods.push({ name: m[1]!, line: i + 1 });
+    }
+  }
+  return methods;
+}
+
+export class PythonAnalyzer implements AnalyzerPlugin {
+  name = 'python';
+  languages = ['python'];
+  extensions = ['.py'];
+
+  analyzeFile(content: string, relPath: string, _rootDir: string): FileAnalysis {
+    const nodes: IntelNode[] = [];
+    const edges: IntelEdge[] = [];
+
+    const fileId = `file:${relPath}`;
+    const lines = content.split('\n');
+
+    // Detect frameworks at file level
+    const isAirflow = AIRFLOW_DAG_RE.test(content);
+    const isSpark = SPARK_IMPORT_RE.test(content);
+    // Reset stateful regexes after .test()
+    AIRFLOW_DAG_RE.lastIndex = 0;
+    SPARK_IMPORT_RE.lastIndex = 0;
+
+    const fileFramework = isAirflow ? 'airflow' : isSpark ? 'spark' : undefined;
+
+    // ── 1. File node ──────────────────────────────────────────────────────
+    const fileNode: IntelNode = {
+      id: fileId,
+      type: 'file',
+      name: relPath,
+      filePath: relPath,
+      language: 'python',
+      metadata: {},
+    };
+    if (fileFramework) fileNode.framework = fileFramework;
+    nodes.push(fileNode);
+
+    // ── 2. Relative imports → import edges ───────────────────────────────
+    const importPattern = new RegExp(RELATIVE_IMPORT_RE.source, RELATIVE_IMPORT_RE.flags);
+    let importMatch: RegExpExecArray | null;
+    while ((importMatch = importPattern.exec(content)) !== null) {
+      const rawImport = importMatch[1] ?? importMatch[2];
+      if (!rawImport) continue;
+      // Convert dot notation to path-like target id
+      const targetId = `file:${rawImport}`;
+      edges.push({ source: fileId, target: targetId, type: 'imports' });
+    }
+
+    // ── 3. Class nodes ───────────────────────────────────────────────────
+    const classPattern = new RegExp(CLASS_RE.source, CLASS_RE.flags);
+    let classMatch: RegExpExecArray | null;
+    // Track SQLAlchemy classes for table detection
+    const sqlaClasses = new Set<string>();
+
+    // Pre-check for SQLAlchemy models
+    const sqlaPattern = new RegExp(SQLA_MODEL_RE.source, SQLA_MODEL_RE.flags);
+    let sqlaMatch: RegExpExecArray | null;
+    while ((sqlaMatch = sqlaPattern.exec(content)) !== null) {
+      sqlaClasses.add(sqlaMatch[1]!);
+    }
+
+    while ((classMatch = classPattern.exec(content)) !== null) {
+      const className = classMatch[1]!;
+      const isExported = !className.startsWith('_');
+
+      if (sqlaClasses.has(className)) {
+        // SQLAlchemy model → table node
+        // Find column names
+        const classStartIdx = content.lastIndexOf('\n', classMatch.index);
+        const classLineNum = content.slice(0, classMatch.index).split('\n').length;
+        const classLines = lines.slice(classLineNum - 1);
+        const columns: string[] = [];
+        const colPat = new RegExp(SQLA_COLUMN_RE.source, SQLA_COLUMN_RE.flags);
+        // Scan within class body (next ~50 lines after class def)
+        const classBody = classLines.slice(1, 50).join('\n');
+        let colMatch: RegExpExecArray | null;
+        while ((colMatch = colPat.exec(classBody)) !== null) {
+          columns.push(colMatch[1]!);
+        }
+
+        const tableId = `table:${className}`;
+        nodes.push({
+          id: tableId,
+          type: 'table',
+          name: className,
+          filePath: relPath,
+          framework: 'sqlalchemy',
+          metadata: { columns },
+        });
+        edges.push({ source: fileId, target: tableId, type: 'contains' });
+      } else if (isExported) {
+        const classId = `class:${className}`;
+        nodes.push({
+          id: classId,
+          type: 'class',
+          name: className,
+          filePath: relPath,
+          language: 'python',
+          metadata: {},
+        });
+        edges.push({ source: fileId, target: classId, type: 'contains' });
+      }
+    }
+
+    // ── 4. Function nodes ─────────────────────────────────────────────────
+    const seenFunctions = new Set<string>();
+    const funcPattern = new RegExp(FUNC_RE.source, FUNC_RE.flags);
+    let funcMatch: RegExpExecArray | null;
+    while ((funcMatch = funcPattern.exec(content)) !== null) {
+      const funcName = funcMatch[1]!;
+      // Skip private functions (starting with _)
+      if (funcName.startsWith('_')) continue;
+      // Skip if already seen
+      if (seenFunctions.has(funcName)) continue;
+      seenFunctions.add(funcName);
+
+      const funcId = `function:${funcName}`;
+      nodes.push({
+        id: funcId,
+        type: 'function',
+        name: funcName,
+        filePath: relPath,
+        language: 'python',
+        metadata: {},
+      });
+      edges.push({ source: fileId, target: funcId, type: 'contains' });
+    }
+
+    // ── 5. Flask endpoints ────────────────────────────────────────────────
+    const flaskPattern = new RegExp(FLASK_ROUTE_RE.source, FLASK_ROUTE_RE.flags);
+    let flaskMatch: RegExpExecArray | null;
+    while ((flaskMatch = flaskPattern.exec(content)) !== null) {
+      const path = flaskMatch[1]!;
+      const methodsRaw = flaskMatch[2];
+      let methods: string[] = ['GET'];
+      if (methodsRaw) {
+        methods = methodsRaw
+          .split(',')
+          .map(m => m.trim().replace(/['"]/g, '').toUpperCase())
+          .filter(Boolean);
+      }
+      for (const method of methods) {
+        const routeName = `${method} ${path}`;
+        const endpointId = `endpoint:${routeName}`;
+        nodes.push({
+          id: endpointId,
+          type: 'endpoint',
+          name: routeName,
+          filePath: relPath,
+          framework: 'flask',
+          metadata: { method, path },
+        });
+      }
+    }
+
+    // ── 6. Django URL endpoints (only in urls.py files) ───────────────────
+    if (relPath.endsWith('urls.py')) {
+      const djangoPattern = new RegExp(DJANGO_PATH_RE.source, DJANGO_PATH_RE.flags);
+      let djangoMatch: RegExpExecArray | null;
+      while ((djangoMatch = djangoPattern.exec(content)) !== null) {
+        const urlPath = djangoMatch[1]!;
+        const routeName = `GET ${urlPath}`;
+        const endpointId = `endpoint:${routeName}`;
+        nodes.push({
+          id: endpointId,
+          type: 'endpoint',
+          name: routeName,
+          filePath: relPath,
+          framework: 'django',
+          metadata: { path: urlPath },
+        });
+      }
+    }
+
+    // ── 7. Config nodes (os.environ / os.getenv) ──────────────────────────
+    const seenEnvVars = new Set<string>();
+    const envPattern = new RegExp(OS_ENV_RE.source, OS_ENV_RE.flags);
+    let envMatch: RegExpExecArray | null;
+    while ((envMatch = envPattern.exec(content)) !== null) {
+      const varName = envMatch[1] ?? envMatch[2];
+      if (!varName) continue;
+      if (seenEnvVars.has(varName)) continue;
+      seenEnvVars.add(varName);
+
+      nodes.push({
+        id: `config:${varName}`,
+        type: 'config',
+        name: varName,
+        filePath: relPath,
+        metadata: {},
+      });
+    }
+
+    return { nodes, edges };
+  }
+}
diff --git a/src/intel/analyzers/registry.ts b/src/intel/analyzers/registry.ts
new file mode 100644
index 0000000..c5a7429
--- /dev/null
+++ b/src/intel/analyzers/registry.ts
@@ -0,0 +1,48 @@
+import { basename } from 'node:path';
+import type { AnalyzerPlugin } from './base.js';
+import { TypeScriptAnalyzer } from './typescript.js';
+import { PythonAnalyzer } from './python.js';
+import { CobolAnalyzer } from './cobol.js';
+import { SqlAnalyzer } from './sql.js';
+import { DockerAnalyzer } from './docker.js';
+import { OpenApiAnalyzer } from './openapi.js';
+
+export class AnalyzerRegistry {
+  private plugins: AnalyzerPlugin[] = [];
+  private extMap = new Map<string, AnalyzerPlugin>();
+  private filenameMap = new Map<string, AnalyzerPlugin>();
+
+  register(plugin: AnalyzerPlugin): void {
+    this.plugins.push(plugin);
+    for (const ext of plugin.extensions) {
+      this.extMap.set(ext, plugin);
+    }
+    for (const name of plugin.filenames ?? []) {
+      this.filenameMap.set(name, plugin);
+    }
+  }
+
+  getForFile(filePath: string): AnalyzerPlugin | null {
+    const name = basename(filePath);
+    if (this.filenameMap.has(name)) return this.filenameMap.get(name)!;
+    const dotIdx = name.lastIndexOf('.');
+    if (dotIdx >= 0) {
+      const ext = name.slice(dotIdx);
+      if (this.extMap.has(ext)) return this.extMap.get(ext)!;
+    }
+    return null;
+  }
+
+  getAll(): AnalyzerPlugin[] { return [...this.plugins]; }
+}
+
+export function createDefaultRegistry(): AnalyzerRegistry {
+  const registry = new AnalyzerRegistry();
+  registry.register(new TypeScriptAnalyzer());
+  registry.register(new PythonAnalyzer());
+  registry.register(new CobolAnalyzer());
+  registry.register(new SqlAnalyzer());
+  registry.register(new DockerAnalyzer());
+  registry.register(new OpenApiAnalyzer());
+  return registry;
+}
diff --git a/src/intel/analyzers/sql.test.ts b/src/intel/analyzers/sql.test.ts
new file mode 100644
index 0000000..5c85f31
--- /dev/null
+++ b/src/intel/analyzers/sql.test.ts
@@ -0,0 +1,157 @@
+import { describe, it, expect } from 'vitest';
+import { SqlAnalyzer } from './sql.js';
+
+const analyzer = new SqlAnalyzer();
+
+// ── Metadata ───────────────────────────────────────────────────────────────
+
+describe('SqlAnalyzer — metadata', () => {
+  it('has correct name, language, and extensions', () => {
+    expect(analyzer.name).toBe('sql');
+    expect(analyzer.languages).toContain('sql');
+    expect(analyzer.extensions).toContain('.sql');
+  });
+});
+
+// ── File node ──────────────────────────────────────────────────────────────
+
+describe('SqlAnalyzer — file node', () => {
+  it('creates a file node with language=sql', () => {
+    const { nodes } = analyzer.analyzeFile('SELECT 1;', 'db/schema.sql', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode).toBeDefined();
+    expect(fileNode!.id).toBe('file:db/schema.sql');
+    expect(fileNode!.language).toBe('sql');
+    expect(fileNode!.filePath).toBe('db/schema.sql');
+  });
+
+  it('adds dbtLayer=staging for models/staging/ path', () => {
+    const { nodes } = analyzer.analyzeFile('SELECT 1;', 'models/staging/stg_orders.sql', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode!.metadata['dbtLayer']).toBe('staging');
+  });
+
+  it('adds dbtLayer=mart for models/marts/ path', () => {
+    const { nodes } = analyzer.analyzeFile('SELECT 1;', 'models/marts/dim_customers.sql', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode!.metadata['dbtLayer']).toBe('mart');
+  });
+
+  it('does not add dbtLayer for regular paths', () => {
+    const { nodes } = analyzer.analyzeFile('SELECT 1;', 'db/queries.sql', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode!.metadata['dbtLayer']).toBeUndefined();
+  });
+});
+
+// ── CREATE TABLE ───────────────────────────────────────────────────────────
+
+describe('SqlAnalyzer — CREATE TABLE', () => {
+  it('creates a table node for CREATE TABLE', () => {
+    const code = `CREATE TABLE users (\n  id INT PRIMARY KEY,\n  name VARCHAR(100)\n);`;
+    const { nodes } = analyzer.analyzeFile(code, 'schema.sql', '/root');
+    const tableNode = nodes.find(n => n.type === 'table' && n.name === 'users');
+    expect(tableNode).toBeDefined();
+    expect(tableNode!.id).toBe('table:users');
+    expect(tableNode!.language).toBe('sql');
+  });
+
+  it('extracts column names from CREATE TABLE', () => {
+    const code = `CREATE TABLE orders (\n  order_id INT,\n  customer_id INT,\n  total DECIMAL(10,2)\n);`;
+    const { nodes } = analyzer.analyzeFile(code, 'schema.sql', '/root');
+    const tableNode = nodes.find(n => n.type === 'table' && n.name === 'orders');
+    expect(tableNode!.metadata['columns']).toEqual(
+      expect.arrayContaining(['order_id', 'customer_id', 'total'])
+    );
+  });
+
+  it('handles CREATE TABLE IF NOT EXISTS', () => {
+    const code = `CREATE TABLE IF NOT EXISTS products (id INT);`;
+    const { nodes } = analyzer.analyzeFile(code, 'schema.sql', '/root');
+    const tableNode = nodes.find(n => n.type === 'table' && n.name === 'products');
+    expect(tableNode).toBeDefined();
+  });
+
+  it('creates contains edge from file to table', () => {
+    const code = `CREATE TABLE invoices (id INT);`;
+    const { edges } = analyzer.analyzeFile(code, 'schema.sql', '/root');
+    const containsEdge = edges.find(e => e.type === 'contains' && e.target === 'table:invoices');
+    expect(containsEdge).toBeDefined();
+  });
+});
+
+// ── ALTER TABLE ────────────────────────────────────────────────────────────
+
+describe('SqlAnalyzer — ALTER TABLE', () => {
+  it('creates depends-on edge for ALTER TABLE', () => {
+    const code = `ALTER TABLE users ADD COLUMN email VARCHAR(255);`;
+    const { edges } = analyzer.analyzeFile(code, 'migration.sql', '/root');
+    const edge = edges.find(e => e.type === 'depends-on' && e.target === 'table:users');
+    expect(edge).toBeDefined();
+    expect(edge!.source).toBe('file:migration.sql');
+  });
+});
+
+// ── FOREIGN KEY REFERENCES ─────────────────────────────────────────────────
+
+describe('SqlAnalyzer — FOREIGN KEY detection', () => {
+  it('creates depends-on edge between tables for FOREIGN KEY REFERENCES', () => {
+    const code = `
+CREATE TABLE orders (
+  id INT,
+  user_id INT,
+  FOREIGN KEY (user_id) REFERENCES users(id)
+);`;
+    const { edges } = analyzer.analyzeFile(code, 'schema.sql', '/root');
+    const fkEdge = edges.find(e => e.type === 'depends-on' && e.source === 'table:orders' && e.target === 'table:users');
+    expect(fkEdge).toBeDefined();
+  });
+});
+
+// ── INSERT / SELECT ────────────────────────────────────────────────────────
+
+describe('SqlAnalyzer — INSERT and SELECT', () => {
+  it('creates writes edge for INSERT INTO', () => {
+    const code = `INSERT INTO audit_log (event, ts) VALUES ('login', NOW());`;
+    const { edges } = analyzer.analyzeFile(code, 'queries.sql', '/root');
+    const edge = edges.find(e => e.type === 'writes' && e.target === 'table:audit_log');
+    expect(edge).toBeDefined();
+  });
+
+  it('creates reads edge for SELECT ... FROM', () => {
+    const code = `SELECT id, name FROM customers WHERE active = 1;`;
+    const { edges } = analyzer.analyzeFile(code, 'queries.sql', '/root');
+    const edge = edges.find(e => e.type === 'reads' && e.target === 'table:customers');
+    expect(edge).toBeDefined();
+  });
+});
+
+// ── dbt ────────────────────────────────────────────────────────────────────
+
+describe('SqlAnalyzer — dbt ref() and source()', () => {
+  it('creates depends-on edge for dbt ref()', () => {
+    const code = `SELECT * FROM {{ ref('stg_orders') }}`;
+    const { edges } = analyzer.analyzeFile(code, 'models/marts/orders.sql', '/root');
+    const edge = edges.find(e => e.type === 'depends-on' && e.target === 'file:stg_orders.sql');
+    expect(edge).toBeDefined();
+    expect(edge!.source).toBe('file:models/marts/orders.sql');
+  });
+
+  it('creates reads edge for dbt source()', () => {
+    const code = `SELECT * FROM {{ source('raw', 'orders') }}`;
+    const { edges } = analyzer.analyzeFile(code, 'models/staging/stg_orders.sql', '/root');
+    const edge = edges.find(e => e.type === 'reads' && e.target === 'table:raw.orders');
+    expect(edge).toBeDefined();
+  });
+
+  it('handles multiple dbt refs in one file', () => {
+    const code = `
+SELECT o.id, c.name
+FROM {{ ref('stg_orders') }} o
+JOIN {{ ref('stg_customers') }} c ON o.customer_id = c.id
+`;
+    const { edges } = analyzer.analyzeFile(code, 'models/marts/summary.sql', '/root');
+    const dbtEdges = edges.filter(e => e.type === 'depends-on');
+    expect(dbtEdges).toHaveLength(2);
+  });
+});
diff --git a/src/intel/analyzers/sql.ts b/src/intel/analyzers/sql.ts
new file mode 100644
index 0000000..ce6ed55
--- /dev/null
+++ b/src/intel/analyzers/sql.ts
@@ -0,0 +1,203 @@
+import type { AnalyzerPlugin, FileAnalysis } from './base.js';
+import type { IntelNode, IntelEdge } from '../types.js';
+
+// CREATE TABLE [IF NOT EXISTS] table_name
+const CREATE_TABLE_RE = /CREATE\s+TABLE\s+(?:IF\s+NOT\s+EXISTS\s+)?[`"']?(\w+)[`"']?/gi;
+
+// ALTER TABLE table_name
+const ALTER_TABLE_RE = /ALTER\s+TABLE\s+[`"']?(\w+)[`"']?/gi;
+
+// FOREIGN KEY ... REFERENCES table_name
+const FK_REFERENCES_RE = /REFERENCES\s+[`"']?(\w+)[`"']?/gi;
+
+// INSERT INTO table_name
+const INSERT_RE = /INSERT\s+INTO\s+[`"']?(\w+)[`"']?/gi;
+
+// SELECT ... FROM table_name (simple — first FROM after SELECT)
+const SELECT_FROM_RE = /\bFROM\s+[`"']?(\w+)[`"']?/gi;
+
+// dbt ref: {{ ref('model_name') }}
+const DBT_REF_RE = /\{\{\s*ref\s*\(\s*['"]([^'"]+)['"]\s*\)\s*\}\}/g;
+
+// dbt source: {{ source('src', 'table') }}
+const DBT_SOURCE_RE = /\{\{\s*source\s*\(\s*['"]([^'"]+)['"]\s*,\s*['"]([^'"]+)['"]\s*\)\s*\}\}/g;
+
+// Column extraction from CREATE TABLE body
+function extractColumns(createStmt: string): string[] {
+  // Find the body inside the parentheses
+  const parenStart = createStmt.indexOf('(');
+  if (parenStart === -1) return [];
+  const parenEnd = createStmt.lastIndexOf(')');
+  if (parenEnd === -1) return [];
+
+  const body = createStmt.slice(parenStart + 1, parenEnd);
+  const columns: string[] = [];
+
+  // Each line that doesn't start with constraint keywords is a column
+  const CONSTRAINT_KW = /^\s*(?:PRIMARY\s+KEY|FOREIGN\s+KEY|UNIQUE|CHECK|CONSTRAINT|INDEX|KEY)\b/i;
+  for (const line of body.split('\n')) {
+    const trimmed = line.trim();
+    if (!trimmed || CONSTRAINT_KW.test(trimmed)) continue;
+    // First word is column name (strip backticks/quotes)
+    const colMatch = /^[`"']?(\w+)[`"']?/.exec(trimmed);
+    if (colMatch) {
+      columns.push(colMatch[1]!);
+    }
+  }
+  return columns;
+}
+
+export class SqlAnalyzer implements AnalyzerPlugin {
+  name = 'sql';
+  languages = ['sql'];
+  extensions = ['.sql'];
+
+  analyzeFile(content: string, relPath: string, _rootDir: string): FileAnalysis {
+    const nodes: IntelNode[] = [];
+    const edges: IntelEdge[] = [];
+
+    const fileId = `file:${relPath}`;
+
+    // dbt layer detection from file path
+    let dbtLayer: string | undefined;
+    if (relPath.includes('models/staging/')) dbtLayer = 'staging';
+    else if (relPath.includes('models/marts/')) dbtLayer = 'mart';
+
+    // ── 1. File node ──────────────────────────────────────────────────────
+    const fileMetadata: Record<string, unknown> = {};
+    if (dbtLayer) fileMetadata['dbtLayer'] = dbtLayer;
+    nodes.push({
+      id: fileId,
+      type: 'file',
+      name: relPath,
+      filePath: relPath,
+      language: 'sql',
+      metadata: fileMetadata,
+    });
+
+    // ── 2. CREATE TABLE → table nodes ─────────────────────────────────────
+    // We need to capture the full CREATE TABLE statement to extract columns.
+    // Strategy: find all CREATE TABLE positions and extract content up to first ';' or end.
+    const knownTables = new Set<string>();
+    const createPattern = new RegExp(CREATE_TABLE_RE.source, CREATE_TABLE_RE.flags);
+    let createMatch: RegExpExecArray | null;
+    while ((createMatch = createPattern.exec(content)) !== null) {
+      const tableName = createMatch[1]!;
+      knownTables.add(tableName.toUpperCase());
+
+      // Extract columns by grabbing the statement from the match position
+      const stmtStart = createMatch.index;
+      const stmtEnd = content.indexOf(';', stmtStart);
+      const stmtBody = stmtEnd !== -1 ? content.slice(stmtStart, stmtEnd + 1) : content.slice(stmtStart);
+      const columns = extractColumns(stmtBody);
+
+      const tableId = `table:${tableName}`;
+      nodes.push({
+        id: tableId,
+        type: 'table',
+        name: tableName,
+        filePath: relPath,
+        language: 'sql',
+        metadata: { columns },
+      });
+      edges.push({ source: fileId, target: tableId, type: 'contains' });
+    }
+
+    // ── 3. ALTER TABLE → depends-on edges ────────────────────────────────
+    const alterPattern = new RegExp(ALTER_TABLE_RE.source, ALTER_TABLE_RE.flags);
+    let alterMatch: RegExpExecArray | null;
+    while ((alterMatch = alterPattern.exec(content)) !== null) {
+      const tableName = alterMatch[1]!;
+      const tableId = `table:${tableName}`;
+      edges.push({ source: fileId, target: tableId, type: 'depends-on' });
+    }
+
+    // ── 4. FOREIGN KEY REFERENCES → depends-on between tables ────────────
+    // Strategy: find FK context — find the enclosing CREATE TABLE
+    const fkPattern = new RegExp(FK_REFERENCES_RE.source, FK_REFERENCES_RE.flags);
+    let fkMatch: RegExpExecArray | null;
+    while ((fkMatch = fkPattern.exec(content)) !== null) {
+      const referencedTable = fkMatch[1]!;
+      // Find which CREATE TABLE contains this reference
+      // Look backwards for the most recent CREATE TABLE
+      const beforeFk = content.slice(0, fkMatch.index);
+      const createMatches = [...beforeFk.matchAll(/CREATE\s+TABLE\s+(?:IF\s+NOT\s+EXISTS\s+)?[`"']?(\w+)[`"']?/gi)];
+      if (createMatches.length > 0) {
+        const sourceTable = createMatches[createMatches.length - 1]![1]!;
+        edges.push({
+          source: `table:${sourceTable}`,
+          target: `table:${referencedTable}`,
+          type: 'depends-on',
+        });
+      }
+    }
+
+    // ── 5. INSERT INTO → writes edges ─────────────────────────────────────
+    const insertPattern = new RegExp(INSERT_RE.source, INSERT_RE.flags);
+    let insertMatch: RegExpExecArray | null;
+    while ((insertMatch = insertPattern.exec(content)) !== null) {
+      const tableName = insertMatch[1]!;
+      const tableId = `table:${tableName}`;
+      // Ensure table node exists
+      if (!knownTables.has(tableName.toUpperCase())) {
+        knownTables.add(tableName.toUpperCase());
+        nodes.push({
+          id: tableId,
+          type: 'table',
+          name: tableName,
+          filePath: relPath,
+          language: 'sql',
+          metadata: {},
+        });
+      }
+      edges.push({ source: fileId, target: tableId, type: 'writes' });
+    }
+
+    // ── 6. SELECT FROM → reads edges ──────────────────────────────────────
+    const seenReadTables = new Set<string>();
+    const selectPattern = new RegExp(SELECT_FROM_RE.source, SELECT_FROM_RE.flags);
+    let selectMatch: RegExpExecArray | null;
+    while ((selectMatch = selectPattern.exec(content)) !== null) {
+      const tableName = selectMatch[1]!;
+      // Skip SQL keywords that can follow FROM
+      if (['WHERE', 'JOIN', 'ON', 'SELECT', 'SET', 'VALUES', 'DUAL'].includes(tableName.toUpperCase())) continue;
+      if (seenReadTables.has(tableName.toUpperCase())) continue;
+      seenReadTables.add(tableName.toUpperCase());
+
+      const tableId = `table:${tableName}`;
+      if (!knownTables.has(tableName.toUpperCase())) {
+        knownTables.add(tableName.toUpperCase());
+        nodes.push({
+          id: tableId,
+          type: 'table',
+          name: tableName,
+          filePath: relPath,
+          language: 'sql',
+          metadata: {},
+        });
+      }
+      edges.push({ source: fileId, target: tableId, type: 'reads' });
+    }
+
+    // ── 7. dbt ref() → depends-on edges ──────────────────────────────────
+    const dbtRefPattern = new RegExp(DBT_REF_RE.source, DBT_REF_RE.flags);
+    let dbtRefMatch: RegExpExecArray | null;
+    while ((dbtRefMatch = dbtRefPattern.exec(content)) !== null) {
+      const modelName = dbtRefMatch[1]!;
+      const targetId = `file:${modelName}.sql`;
+      edges.push({ source: fileId, target: targetId, type: 'depends-on' });
+    }
+
+    // ── 8. dbt source() → reads edges ────────────────────────────────────
+    const dbtSrcPattern = new RegExp(DBT_SOURCE_RE.source, DBT_SOURCE_RE.flags);
+    let dbtSrcMatch: RegExpExecArray | null;
+    while ((dbtSrcMatch = dbtSrcPattern.exec(content)) !== null) {
+      const srcName = dbtSrcMatch[1]!;
+      const tableName = dbtSrcMatch[2]!;
+      const targetId = `table:${srcName}.${tableName}`;
+      edges.push({ source: fileId, target: targetId, type: 'reads' });
+    }
+
+    return { nodes, edges };
+  }
+}
diff --git a/src/intel/analyzers/typescript.test.ts b/src/intel/analyzers/typescript.test.ts
new file mode 100644
index 0000000..9fc23c8
--- /dev/null
+++ b/src/intel/analyzers/typescript.test.ts
@@ -0,0 +1,404 @@
+import { describe, it, expect } from 'vitest';
+import { TypeScriptAnalyzer } from './typescript.js';
+
+const analyzer = new TypeScriptAnalyzer();
+
+describe('TypeScriptAnalyzer — metadata', () => {
+  it('has correct name and extensions', () => {
+    expect(analyzer.name).toBe('typescript');
+    expect(analyzer.extensions).toContain('.ts');
+    expect(analyzer.extensions).toContain('.tsx');
+    expect(analyzer.extensions).toContain('.js');
+    expect(analyzer.extensions).toContain('.jsx');
+    expect(analyzer.extensions).toContain('.mjs');
+    expect(analyzer.extensions).toContain('.cjs');
+    expect(analyzer.languages).toContain('typescript');
+    expect(analyzer.languages).toContain('javascript');
+  });
+});
+
+// ── File node ──────────────────────────────────────────────────────────────
+
+describe('TypeScriptAnalyzer — file node', () => {
+  it('creates a file node with language=typescript for .ts files', () => {
+    const { nodes } = analyzer.analyzeFile('const x = 1;', 'src/index.ts', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode).toBeDefined();
+    expect(fileNode!.id).toBe('file:src/index.ts');
+    expect(fileNode!.language).toBe('typescript');
+    expect(fileNode!.filePath).toBe('src/index.ts');
+  });
+
+  it('creates a file node with language=typescript for .tsx files', () => {
+    const { nodes } = analyzer.analyzeFile('', 'src/App.tsx', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode!.language).toBe('typescript');
+  });
+
+  it('creates a file node with language=javascript for .js files', () => {
+    const { nodes } = analyzer.analyzeFile('const x = 1;', 'src/util.js', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode!.language).toBe('javascript');
+  });
+
+  it('creates a file node with language=javascript for .mjs files', () => {
+    const { nodes } = analyzer.analyzeFile('', 'src/worker.mjs', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode!.language).toBe('javascript');
+  });
+
+  it('creates a file node with language=javascript for .cjs files', () => {
+    const { nodes } = analyzer.analyzeFile('', 'src/legacy.cjs', '/root');
+    const fileNode = nodes.find(n => n.type === 'file');
+    expect(fileNode!.language).toBe('javascript');
+  });
+});
+
+// ── Exported symbols ───────────────────────────────────────────────────────
+
+describe('TypeScriptAnalyzer — exported function nodes', () => {
+  it('extracts exported function as function node', () => {
+    const code = `export function handleRequest(req, res) {}`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/handler.ts', '/root');
+    const fn = nodes.find(n => n.type === 'function' && n.name === 'handleRequest');
+    expect(fn).toBeDefined();
+    expect(fn!.id).toBe('function:handleRequest');
+    expect(fn!.filePath).toBe('src/handler.ts');
+  });
+
+  it('extracts exported async function', () => {
+    const code = `export async function fetchData() {}`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/api.ts', '/root');
+    const fn = nodes.find(n => n.type === 'function' && n.name === 'fetchData');
+    expect(fn).toBeDefined();
+  });
+
+  it('extracts exported default function', () => {
+    const code = `export default function App() { return null; }`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/App.tsx', '/root');
+    const fn = nodes.find(n => n.type === 'function' && n.name === 'App');
+    expect(fn).toBeDefined();
+  });
+
+  it('extracts exported const as function node', () => {
+    const code = `export const myUtil = () => {};`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/utils.ts', '/root');
+    const fn = nodes.find(n => n.type === 'function' && n.name === 'myUtil');
+    expect(fn).toBeDefined();
+  });
+
+  it('extracts exported enum as function node', () => {
+    const code = `export enum Status { Active, Inactive }`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/types.ts', '/root');
+    const fn = nodes.find(n => n.type === 'function' && n.name === 'Status');
+    expect(fn).toBeDefined();
+  });
+
+  it('ignores non-exported functions', () => {
+    const code = `function internalHelper() {}`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/util.ts', '/root');
+    const fn = nodes.find(n => n.type === 'function');
+    expect(fn).toBeUndefined();
+  });
+});
+
+describe('TypeScriptAnalyzer — exported class nodes', () => {
+  it('extracts exported class as class node', () => {
+    const code = `export class UserService {}`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/services/user.ts', '/root');
+    const cls = nodes.find(n => n.type === 'class' && n.name === 'UserService');
+    expect(cls).toBeDefined();
+    expect(cls!.id).toBe('class:UserService');
+    expect(cls!.filePath).toBe('src/services/user.ts');
+  });
+
+  it('extracts exported interface as class node', () => {
+    const code = `export interface UserDto { id: string; }`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/dto.ts', '/root');
+    const cls = nodes.find(n => n.type === 'class' && n.name === 'UserDto');
+    expect(cls).toBeDefined();
+  });
+
+  it('extracts exported type alias as class node', () => {
+    const code = `export type UserId = string;`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/types.ts', '/root');
+    const cls = nodes.find(n => n.type === 'class' && n.name === 'UserId');
+    expect(cls).toBeDefined();
+  });
+
+  it('extracts multiple classes from a file', () => {
+    const code = `
+export class Foo {}
+export class Bar {}
+`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/models.ts', '/root');
+    const classes = nodes.filter(n => n.type === 'class');
+    expect(classes).toHaveLength(2);
+    expect(classes.map(c => c.name)).toContain('Foo');
+    expect(classes.map(c => c.name)).toContain('Bar');
+  });
+});
+
+// ── Contains edges ─────────────────────────────────────────────────────────
+
+describe('TypeScriptAnalyzer — contains edges', () => {
+  it('creates contains edges from file to its symbols', () => {
+    const code = `
+export class MyService {}
+export function doWork() {}
+`;
+    const { edges } = analyzer.analyzeFile(code, 'src/service.ts', '/root');
+    const containsEdges = edges.filter(e => e.type === 'contains');
+    expect(containsEdges.some(e => e.source === 'file:src/service.ts' && e.target === 'class:MyService')).toBe(true);
+    expect(containsEdges.some(e => e.source === 'file:src/service.ts' && e.target === 'function:doWork')).toBe(true);
+  });
+});
+
+// ── Import edges ───────────────────────────────────────────────────────────
+
+describe('TypeScriptAnalyzer — import edges', () => {
+  it('extracts ESM import as imports edge', () => {
+    const code = `import { foo } from './foo.js';`;
+    const { edges } = analyzer.analyzeFile(code, 'src/index.ts', '/root');
+    const importEdge = edges.find(e => e.type === 'imports');
+    expect(importEdge).toBeDefined();
+    expect(importEdge!.source).toBe('file:src/index.ts');
+  });
+
+  it('resolves .js extension to .ts for import target', () => {
+    const code = `import { foo } from './foo.js';`;
+    const { edges } = analyzer.analyzeFile(code, 'src/index.ts', '/root');
+    const importEdge = edges.find(e => e.type === 'imports');
+    expect(importEdge!.target).toBe('file:src/foo.ts');
+  });
+
+  it('extracts relative import without extension', () => {
+    const code = `import { bar } from './utils';`;
+    const { edges } = analyzer.analyzeFile(code, 'src/index.ts', '/root');
+    const importEdge = edges.find(e => e.type === 'imports');
+    expect(importEdge).toBeDefined();
+    expect(importEdge!.target).toBe('file:src/utils.ts');
+  });
+
+  it('extracts require() as imports edge', () => {
+    const code = `const x = require('./helper');`;
+    const { edges } = analyzer.analyzeFile(code, 'src/legacy.js', '/root');
+    const importEdge = edges.find(e => e.type === 'imports');
+    expect(importEdge).toBeDefined();
+    expect(importEdge!.source).toBe('file:src/legacy.js');
+  });
+
+  it('extracts dynamic import() as imports edge', () => {
+    const code = `const mod = import('./dynamic.js');`;
+    const { edges } = analyzer.analyzeFile(code, 'src/loader.ts', '/root');
+    const importEdge = edges.find(e => e.type === 'imports');
+    expect(importEdge).toBeDefined();
+  });
+
+  it('ignores non-relative imports (node_modules)', () => {
+    const code = `import chalk from 'chalk';\nimport { join } from 'node:path';`;
+    const { edges } = analyzer.analyzeFile(code, 'src/cli.ts', '/root');
+    const importEdges = edges.filter(e => e.type === 'imports');
+    expect(importEdges).toHaveLength(0);
+  });
+
+  it('handles import from subdirectory', () => {
+    const code = `import { UserService } from './services/user.js';`;
+    const { edges } = analyzer.analyzeFile(code, 'src/index.ts', '/root');
+    const importEdge = edges.find(e => e.type === 'imports');
+    expect(importEdge!.target).toBe('file:src/services/user.ts');
+  });
+});
+
+// ── Express routes ─────────────────────────────────────────────────────────
+
+describe('TypeScriptAnalyzer — Express route detection', () => {
+  it('detects app.get route as endpoint node', () => {
+    const code = `app.get('/users', handler);`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/routes.ts', '/root');
+    const endpoint = nodes.find(n => n.type === 'endpoint');
+    expect(endpoint).toBeDefined();
+    expect(endpoint!.name).toBe('GET /users');
+    expect(endpoint!.framework).toBe('express');
+    expect(endpoint!.id).toBe('endpoint:GET /users');
+  });
+
+  it('detects app.post route', () => {
+    const code = `app.post('/users', createUser);`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/routes.ts', '/root');
+    const endpoint = nodes.find(n => n.type === 'endpoint');
+    expect(endpoint!.name).toBe('POST /users');
+  });
+
+  it('detects router.put route', () => {
+    const code = `router.put('/users/:id', updateUser);`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/routes.ts', '/root');
+    const endpoint = nodes.find(n => n.type === 'endpoint');
+    expect(endpoint!.name).toBe('PUT /users/:id');
+  });
+
+  it('detects router.delete route', () => {
+    const code = `router.delete('/users/:id', deleteUser);`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/routes.ts', '/root');
+    const endpoint = nodes.find(n => n.type === 'endpoint');
+    expect(endpoint!.name).toBe('DELETE /users/:id');
+  });
+
+  it('detects router.patch route', () => {
+    const code = `router.patch('/items/:id', patchItem);`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/routes.ts', '/root');
+    const endpoint = nodes.find(n => n.type === 'endpoint');
+    expect(endpoint!.name).toBe('PATCH /items/:id');
+  });
+
+  it('detects multiple routes in one file', () => {
+    const code = `
+app.get('/users', listUsers);
+app.post('/users', createUser);
+app.delete('/users/:id', deleteUser);
+`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/routes.ts', '/root');
+    const endpoints = nodes.filter(n => n.type === 'endpoint');
+    expect(endpoints).toHaveLength(3);
+    expect(endpoints.map(e => e.name)).toContain('GET /users');
+    expect(endpoints.map(e => e.name)).toContain('POST /users');
+    expect(endpoints.map(e => e.name)).toContain('DELETE /users/:id');
+  });
+
+  it('sets filePath on endpoint node', () => {
+    const code = `app.get('/health', check);`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/routes.ts', '/root');
+    const endpoint = nodes.find(n => n.type === 'endpoint');
+    expect(endpoint!.filePath).toBe('src/routes.ts');
+  });
+});
+
+// ── React components ───────────────────────────────────────────────────────
+
+describe('TypeScriptAnalyzer — React component detection', () => {
+  it('marks exported function in .tsx file with framework=react', () => {
+    const code = `export function Button({ label }: Props) { return <span>{label}</span>; }`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/components/Button.tsx', '/root');
+    const fn = nodes.find(n => n.type === 'function' && n.name === 'Button');
+    expect(fn).toBeDefined();
+    expect(fn!.framework).toBe('react');
+  });
+
+  it('marks exported default function in .tsx file with framework=react', () => {
+    const code = `export default function App() { return <div/>; }`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/App.tsx', '/root');
+    const fn = nodes.find(n => n.type === 'function' && n.name === 'App');
+    expect(fn!.framework).toBe('react');
+  });
+
+  it('does NOT set framework=react for .ts files even with function exports', () => {
+    const code = `export function processData() {}`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/processor.ts', '/root');
+    const fn = nodes.find(n => n.type === 'function' && n.name === 'processData');
+    expect(fn!.framework).toBeUndefined();
+  });
+
+  it('does NOT set framework=react for .jsx files (only .tsx)', () => {
+    const code = `export function Widget() { return null; }`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/Widget.jsx', '/root');
+    const fn = nodes.find(n => n.type === 'function' && n.name === 'Widget');
+    // .jsx is treated as javascript so no react framework tagging
+    expect(fn!.framework).toBeUndefined();
+  });
+});
+
+// ── Config / process.env ───────────────────────────────────────────────────
+
+describe('TypeScriptAnalyzer — process.env detection', () => {
+  it('detects process.env.PORT as config node', () => {
+    const code = `const port = process.env.PORT ?? 3000;`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/server.ts', '/root');
+    const cfg = nodes.find(n => n.type === 'config' && n.name === 'PORT');
+    expect(cfg).toBeDefined();
+    expect(cfg!.id).toBe('config:PORT');
+    expect(cfg!.filePath).toBe('src/server.ts');
+  });
+
+  it('detects multiple env vars', () => {
+    const code = `
+const db = process.env.DATABASE_URL;
+const secret = process.env.JWT_SECRET;
+const port = process.env.PORT;
+`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/config.ts', '/root');
+    const cfgNodes = nodes.filter(n => n.type === 'config');
+    expect(cfgNodes).toHaveLength(3);
+    const names = cfgNodes.map(c => c.name);
+    expect(names).toContain('DATABASE_URL');
+    expect(names).toContain('JWT_SECRET');
+    expect(names).toContain('PORT');
+  });
+
+  it('deduplicates repeated env var references', () => {
+    const code = `
+const a = process.env.API_KEY;
+const b = process.env.API_KEY || 'default';
+`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/client.ts', '/root');
+    const cfgNodes = nodes.filter(n => n.type === 'config' && n.name === 'API_KEY');
+    expect(cfgNodes).toHaveLength(1);
+  });
+
+  it('returns empty config nodes when no process.env usage', () => {
+    const code = `export function add(a: number, b: number) { return a + b; }`;
+    const { nodes } = analyzer.analyzeFile(code, 'src/math.ts', '/root');
+    const cfgNodes = nodes.filter(n => n.type === 'config');
+    expect(cfgNodes).toHaveLength(0);
+  });
+});
+
+// ── Combined scenario ──────────────────────────────────────────────────────
+
+describe('TypeScriptAnalyzer — combined scenario', () => {
+  it('handles a realistic Express route file', () => {
+    const code = `
+import { Router } from 'express';
+import { UserService } from './services/user.js';
+
+const router = Router();
+
+export class UserController {
+  constructor(private svc: UserService) {}
+}
+
+router.get('/users', async (req, res) => {
+  const port = process.env.PORT;
+  res.json([]);
+});
+
+router.post('/users', async (req, res) => {
+  res.status(201).json({});
+});
+
+export default router;
+`;
+    const { nodes, edges } = analyzer.analyzeFile(code, 'src/routes/users.ts', '/root');
+
+    // File node
+    expect(nodes.find(n => n.id === 'file:src/routes/users.ts')).toBeDefined();
+
+    // Class node
+    expect(nodes.find(n => n.type === 'class' && n.name === 'UserController')).toBeDefined();
+
+    // Endpoint nodes
+    const endpoints = nodes.filter(n => n.type === 'endpoint');
+    expect(endpoints).toHaveLength(2);
+
+    // Config node
+    expect(nodes.find(n => n.type === 'config' && n.name === 'PORT')).toBeDefined();
+
+    // Import edge (only relative imports)
+    const importEdges = edges.filter(e => e.type === 'imports');
+    expect(importEdges).toHaveLength(1);
+    expect(importEdges[0]!.target).toBe('file:src/routes/services/user.ts');
+
+    // Contains edges
+    const containsEdges = edges.filter(e => e.type === 'contains');
+    expect(containsEdges.some(e => e.target === 'class:UserController')).toBe(true);
+  });
+});
diff --git a/src/intel/analyzers/typescript.ts b/src/intel/analyzers/typescript.ts
new file mode 100644
index 0000000..0b9cf10
--- /dev/null
+++ b/src/intel/analyzers/typescript.ts
@@ -0,0 +1,178 @@
+import { dirname, join, extname } from 'node:path';
+import type { AnalyzerPlugin, FileAnalysis } from './base.js';
+import type { IntelNode, IntelEdge } from '../types.js';
+
+// Extensions that map to 'typescript' language
+const TS_EXTS = new Set(['.ts', '.tsx']);
+// Extensions that map to 'javascript' language
+const JS_EXTS = new Set(['.js', '.jsx', '.mjs', '.cjs']);
+
+// Regex patterns for exported symbols
+const SYMBOL_PATTERNS: Array<{ re: RegExp; type: 'class' | 'function' }> = [
+  { re: /export\s+(?:default\s+)?class\s+(\w+)/g, type: 'class' },
+  { re: /export\s+(?:default\s+)?interface\s+(\w+)/g, type: 'class' },
+  { re: /export\s+(?:default\s+)?type\s+(\w+)\s*=/g, type: 'class' },
+  { re: /export\s+(?:default\s+)?(?:async\s+)?function\s+(\w+)/g, type: 'function' },
+  { re: /export\s+(?:default\s+)?enum\s+(\w+)/g, type: 'function' },
+  { re: /export\s+const\s+(\w+)/g, type: 'function' },
+];
+
+// Regex patterns for import extraction (relative only)
+const IMPORT_PATTERNS = [
+  /(?:import|export)\s+.*?from\s+['"]([^'"]+)['"]/g,
+  /(?:import|export)\s*\(\s*['"]([^'"]+)['"]\s*\)/g,
+  /require\s*\(\s*['"]([^'"]+)['"]\s*\)/g,
+];
+
+// Express route detection
+const EXPRESS_ROUTE_RE = /(?:app|router)\.(get|post|put|patch|delete)\s*\(\s*['"]([^'"]+)['"]/g;
+
+// process.env variable detection
+const PROCESS_ENV_RE = /process\.env\.([A-Z_][A-Z0-9_]*)/g;
+
+/**
+ * Resolve a relative import path to a best-guess relative file path.
+ * Does not touch the filesystem — purely string-based.
+ *
+ * Strategy:
+ *  1. Strip .js → try .ts
+ *  2. If no extension, append .ts
+ *  3. Everything is kept relative to the project root
+ */
+function resolveImportPath(rawImport: string, fromFile: string): string {
+  // Join the from-file's directory with the raw import
+  const fromDir = dirname(fromFile);
+  const joined = join(fromDir, rawImport);
+
+  // If .js extension, assume the real file is .ts (ESM convention)
+  if (joined.endsWith('.js')) {
+    return joined.replace(/\.js$/, '.ts');
+  }
+
+  // If .jsx, leave as-is
+  if (joined.endsWith('.jsx') || joined.endsWith('.tsx') || joined.endsWith('.ts') || joined.endsWith('.mjs') || joined.endsWith('.cjs')) {
+    return joined;
+  }
+
+  // No extension: default to .ts
+  return joined + '.ts';
+}
+
+export class TypeScriptAnalyzer implements AnalyzerPlugin {
+  name = 'typescript';
+  languages = ['typescript', 'javascript'];
+  extensions = ['.ts', '.tsx', '.js', '.jsx', '.mjs', '.cjs'];
+
+  analyzeFile(content: string, relPath: string, _rootDir: string): FileAnalysis {
+    const nodes: IntelNode[] = [];
+    const edges: IntelEdge[] = [];
+
+    const ext = extname(relPath).toLowerCase();
+    const language = TS_EXTS.has(ext) ? 'typescript' : JS_EXTS.has(ext) ? 'javascript' : 'javascript';
+    const isTsx = ext === '.tsx';
+    const fileId = `file:${relPath}`;
+
+    // ── 1. File node ──────────────────────────────────────────────────────
+    nodes.push({
+      id: fileId,
+      type: 'file',
+      name: relPath,
+      filePath: relPath,
+      language,
+      metadata: {},
+    });
+
+    // ── 2. Exported symbols ───────────────────────────────────────────────
+    for (const { re, type } of SYMBOL_PATTERNS) {
+      // Reset lastIndex before each use (patterns are module-level with /g)
+      const pattern = new RegExp(re.source, re.flags);
+      let match: RegExpExecArray | null;
+      while ((match = pattern.exec(content)) !== null) {
+        const name = match[1]!;
+        const nodeId = `${type}:${name}`;
+
+        const symbolNode: IntelNode = {
+          id: nodeId,
+          type,
+          name,
+          filePath: relPath,
+          language,
+          metadata: {},
+        };
+
+        // React: .tsx exported functions get framework='react'
+        if (isTsx && type === 'function') {
+          symbolNode.framework = 'react';
+        }
+
+        nodes.push(symbolNode);
+
+        // contains edge: file → symbol
+        edges.push({
+          source: fileId,
+          target: nodeId,
+          type: 'contains',
+        });
+      }
+    }
+
+    // ── 3. Import edges ───────────────────────────────────────────────────
+    for (const patternTemplate of IMPORT_PATTERNS) {
+      const pattern = new RegExp(patternTemplate.source, patternTemplate.flags);
+      let match: RegExpExecArray | null;
+      while ((match = pattern.exec(content)) !== null) {
+        const rawImport = match[1]!;
+        // Only relative imports
+        if (!rawImport.startsWith('.') && !rawImport.startsWith('/')) continue;
+
+        const resolvedPath = resolveImportPath(rawImport, relPath);
+        const targetId = `file:${resolvedPath}`;
+
+        edges.push({
+          source: fileId,
+          target: targetId,
+          type: 'imports',
+        });
+      }
+    }
+
+    // ── 4. Express routes → endpoint nodes ────────────────────────────────
+    const expressPattern = new RegExp(EXPRESS_ROUTE_RE.source, EXPRESS_ROUTE_RE.flags);
+    let routeMatch: RegExpExecArray | null;
+    while ((routeMatch = expressPattern.exec(content)) !== null) {
+      const method = routeMatch[1]!.toUpperCase();
+      const path = routeMatch[2]!;
+      const routeName = `${method} ${path}`;
+      const endpointId = `endpoint:${routeName}`;
+
+      nodes.push({
+        id: endpointId,
+        type: 'endpoint',
+        name: routeName,
+        filePath: relPath,
+        framework: 'express',
+        metadata: { method, path },
+      });
+    }
+
+    // ── 5. process.env → config nodes (deduplicated) ──────────────────────
+    const seenEnvVars = new Set<string>();
+    const envPattern = new RegExp(PROCESS_ENV_RE.source, PROCESS_ENV_RE.flags);
+    let envMatch: RegExpExecArray | null;
+    while ((envMatch = envPattern.exec(content)) !== null) {
+      const varName = envMatch[1]!;
+      if (seenEnvVars.has(varName)) continue;
+      seenEnvVars.add(varName);
+
+      nodes.push({
+        id: `config:${varName}`,
+        type: 'config',
+        name: varName,
+        filePath: relPath,
+        metadata: {},
+      });
+    }
+
+    return { nodes, edges };
+  }
+}
diff --git a/src/intel/enrichment.test.ts b/src/intel/enrichment.test.ts
new file mode 100644
index 0000000..cfe004d
--- /dev/null
+++ b/src/intel/enrichment.test.ts
@@ -0,0 +1,298 @@
+// src/intel/enrichment.test.ts
+
+import { describe, it, expect, vi } from 'vitest';
+import { EnrichmentEngine } from './enrichment.js';
+import { IntelGraph } from './graph.js';
+import type { ProviderAdapter } from '../providers/base.js';
+import type { IntelNode } from './types.js';
+
+// ── Helpers ─────────────────────────────────────────────────────────────────
+
+function makeGraph(): IntelGraph {
+  const g = new IntelGraph();
+  // auth module — highest connectivity (3 edges)
+  g.addNode({ id: 'file:src/auth.ts', type: 'file', name: 'auth.ts', filePath: 'src/auth.ts', language: 'typescript', metadata: {} });
+  // index — medium connectivity (2 edges)
+  g.addNode({ id: 'file:src/index.ts', type: 'file', name: 'index.ts', filePath: 'src/index.ts', language: 'typescript', metadata: {} });
+  // utils — low connectivity (1 edge)
+  g.addNode({ id: 'file:src/utils.ts', type: 'file', name: 'utils.ts', filePath: 'src/utils.ts', language: 'typescript', metadata: {} });
+
+  g.addEdge({ source: 'file:src/index.ts', target: 'file:src/auth.ts', type: 'imports' });
+  g.addEdge({ source: 'file:src/auth.ts', target: 'file:src/utils.ts', type: 'imports' });
+  g.addEdge({ source: 'file:src/index.ts', target: 'file:src/utils.ts', type: 'imports' });
+
+  return g;
+}
+
+function makeMockProvider(responseJson: string): ProviderAdapter {
+  return {
+    info: { name: 'mock', supportsStreaming: true },
+    validateCredentials: async () => {},
+    listModels: async () => [],
+    streamCompletion: async function* () {
+      yield { delta: responseJson, done: true };
+    },
+  } as unknown as ProviderAdapter;
+}
+
+// ── prioritize ───────────────────────────────────────────────────────────────
+
+describe('EnrichmentEngine.prioritize', () => {
+  it('returns high-connectivity nodes first', () => {
+    const graph = makeGraph();
+    const provider = makeMockProvider('{}');
+    const engine = new EnrichmentEngine(provider);
+
+    const order = engine.prioritize(graph);
+
+    // auth.ts: inDegree=1, outDegree=1 → score 2
+    // index.ts: inDegree=0, outDegree=2 → score 2
+    // utils.ts: inDegree=2, outDegree=0 → score 2
+    // All have score=2 in this graph; check they all appear
+    expect(order).toHaveLength(3);
+    expect(order).toContain('file:src/auth.ts');
+    expect(order).toContain('file:src/index.ts');
+    expect(order).toContain('file:src/utils.ts');
+  });
+
+  it('sorts by descending score', () => {
+    const graph = new IntelGraph();
+    graph.addNode({ id: 'hub', type: 'file', name: 'hub.ts', metadata: {} });
+    graph.addNode({ id: 'leaf', type: 'file', name: 'leaf.ts', metadata: {} });
+    graph.addNode({ id: 'isolated', type: 'file', name: 'isolated.ts', metadata: {} });
+    // hub → leaf (hub outDegree=1, leaf inDegree=1)
+    graph.addEdge({ source: 'hub', target: 'leaf', type: 'imports' });
+
+    const provider = makeMockProvider('{}');
+    const engine = new EnrichmentEngine(provider);
+
+    const order = engine.prioritize(graph);
+
+    // hub: score=1, leaf: score=1, isolated: score=0
+    expect(order.indexOf('isolated')).toBeGreaterThan(order.indexOf('hub'));
+    expect(order.indexOf('isolated')).toBeGreaterThan(order.indexOf('leaf'));
+  });
+
+  it('uses churn data to boost score', () => {
+    const graph = new IntelGraph();
+    graph.addNode({ id: 'stable', type: 'file', name: 'stable.ts', metadata: {} });
+    graph.addNode({ id: 'churny', type: 'file', name: 'churny.ts', metadata: {} });
+
+    const churnData = new Map<string, number>([
+      ['churny', 50],
+      ['stable', 0],
+    ]);
+
+    const provider = makeMockProvider('{}');
+    const engine = new EnrichmentEngine(provider);
+
+    const order = engine.prioritize(graph, churnData);
+
+    expect(order[0]).toBe('churny');
+    expect(order[1]).toBe('stable');
+  });
+});
+
+// ── buildPrompt ───────────────────────────────────────────────────────────────
+
+describe('EnrichmentEngine.buildPrompt', () => {
+  const node: IntelNode = {
+    id: 'file:src/auth.ts',
+    type: 'file',
+    name: 'auth.ts',
+    filePath: 'src/auth.ts',
+    language: 'typescript',
+    framework: 'express',
+    metadata: {},
+  };
+
+  const neighbor: IntelNode = {
+    id: 'file:src/utils.ts',
+    type: 'file',
+    name: 'utils.ts',
+    metadata: {},
+  };
+
+  it('includes node context in the user prompt', () => {
+    const provider = makeMockProvider('{}');
+    const engine = new EnrichmentEngine(provider);
+
+    const { user } = engine.buildPrompt(node, [neighbor], 'shallow');
+
+    expect(user).toContain('auth.ts');
+    expect(user).toContain('typescript');
+    expect(user).toContain('express');
+    expect(user).toContain('utils.ts');
+  });
+
+  it('shallow depth only requests purpose and summary in system prompt', () => {
+    const provider = makeMockProvider('{}');
+    const engine = new EnrichmentEngine(provider);
+
+    const { system } = engine.buildPrompt(node, [], 'shallow');
+
+    expect(system).toContain('purpose');
+    expect(system).toContain('summary');
+    // deep-only fields should NOT be in shallow system prompt
+    expect(system).not.toContain('pattern');
+    expect(system).not.toContain('semanticEdges');
+  });
+
+  it('deep depth requests all fields in system prompt', () => {
+    const provider = makeMockProvider('{}');
+    const engine = new EnrichmentEngine(provider);
+
+    const { system } = engine.buildPrompt(node, [], 'deep');
+
+    expect(system).toContain('purpose');
+    expect(system).toContain('summary');
+    expect(system).toContain('pattern');
+    expect(system).toContain('semanticEdges');
+    expect(system).toContain('risk');
+  });
+});
+
+// ── parseResponse ─────────────────────────────────────────────────────────────
+
+describe('EnrichmentEngine.parseResponse', () => {
+  const provider = makeMockProvider('{}');
+  const engine = new EnrichmentEngine(provider);
+
+  it('extracts structured metadata from valid JSON', () => {
+    const json = JSON.stringify({
+      purpose: 'Handles auth',
+      summary: 'Auth middleware',
+      pattern: 'Middleware',
+      domain: 'security',
+      risk: 'medium',
+      semanticEdges: [{ target: 'file:src/db.ts', type: 'reads', reason: 'reads user records' }],
+    });
+
+    const meta = engine.parseResponse(json, 'file:src/auth.ts', 'deep');
+
+    expect(meta.nodeId).toBe('file:src/auth.ts');
+    expect(meta.purpose).toBe('Handles auth');
+    expect(meta.summary).toBe('Auth middleware');
+    expect(meta.pattern).toBe('Middleware');
+    expect(meta.domain).toBe('security');
+    expect(meta.risk).toBe('medium');
+    expect(meta.semanticEdges).toHaveLength(1);
+    expect(meta.semanticEdges![0]!.target).toBe('file:src/db.ts');
+  });
+
+  it('handles malformed JSON gracefully', () => {
+    const meta = engine.parseResponse('not valid json at all!!!', 'file:src/broken.ts', 'shallow');
+
+    expect(meta.nodeId).toBe('file:src/broken.ts');
+    expect(meta.depth).toBe('shallow');
+    expect(meta.purpose).toBeUndefined();
+    expect(meta.summary).toBeUndefined();
+  });
+
+  it('strips markdown code fences', () => {
+    const wrapped = '```json\n{"purpose":"Test","summary":"A test"}\n```';
+    const meta = engine.parseResponse(wrapped, 'file:src/test.ts', 'shallow');
+
+    expect(meta.purpose).toBe('Test');
+    expect(meta.summary).toBe('A test');
+  });
+
+  it('shallow depth ignores deep fields even if present in JSON', () => {
+    const json = JSON.stringify({
+      purpose: 'Quick purpose',
+      summary: 'Quick summary',
+      pattern: 'should be ignored',
+      risk: 'high',
+    });
+
+    const meta = engine.parseResponse(json, 'file:src/x.ts', 'shallow');
+
+    expect(meta.purpose).toBe('Quick purpose');
+    expect(meta.summary).toBe('Quick summary');
+    // deep fields should NOT be set for shallow depth
+    expect(meta.pattern).toBeUndefined();
+    expect(meta.risk).toBeUndefined();
+  });
+});
+
+// ── enrichAll ─────────────────────────────────────────────────────────────────
+
+describe('EnrichmentEngine.enrichAll', () => {
+  it('stops when budget exceeded', async () => {
+    const graph = makeGraph();
+    const provider = makeMockProvider(JSON.stringify({ purpose: 'Handles auth', summary: 'Auth middleware' }));
+    const engine = new EnrichmentEngine(provider);
+
+    // Budget so small only 1 node fits (prompt would be ~200+ tokens, budget=1 forces stop after first)
+    const results = await engine.enrichAll(graph, { depth: 'shallow', maxTokenBudget: 1 });
+
+    // With budget=1, no node should be enriched (cost always > 1)
+    expect(results.length).toBe(0);
+  });
+
+  it('reports progress for each enriched node', async () => {
+    const graph = makeGraph();
+    const provider = makeMockProvider(JSON.stringify({ purpose: 'Some purpose', summary: 'Some summary' }));
+    const engine = new EnrichmentEngine(provider);
+
+    const progressUpdates: Array<{ progress: number; nodeId: string }> = [];
+    await engine.enrichAll(graph, {
+      depth: 'shallow',
+      maxTokenBudget: 1_000_000,
+      onProgress: (progress, nodeId) => {
+        progressUpdates.push({ progress, nodeId });
+      },
+    });
+
+    // Should have one progress update per node
+    expect(progressUpdates.length).toBe(3);
+    // Progress should increase monotonically
+    for (let i = 1; i < progressUpdates.length; i++) {
+      expect(progressUpdates[i]!.progress).toBeGreaterThan(progressUpdates[i - 1]!.progress);
+    }
+  });
+
+  it('skips nodes on LLM error and continues', async () => {
+    const graph = makeGraph();
+    let callCount = 0;
+    const failingProvider: ProviderAdapter = {
+      info: { name: 'mock', supportsStreaming: true },
+      validateCredentials: async () => {},
+      listModels: async () => [],
+      streamCompletion: async function* () {
+        callCount++;
+        if (callCount === 2) {
+          // Second node throws
+          throw new Error('LLM quota exceeded');
+        }
+        yield { delta: JSON.stringify({ purpose: 'OK', summary: 'OK summary' }), done: true };
+      },
+    } as unknown as ProviderAdapter;
+
+    const engine = new EnrichmentEngine(failingProvider);
+    const results = await engine.enrichAll(graph, { depth: 'shallow', maxTokenBudget: 1_000_000 });
+
+    // Should have enriched 2 of 3 nodes (1 skipped due to error)
+    expect(results.length).toBe(2);
+  });
+
+  it('returns empty array when depth is none', async () => {
+    const graph = makeGraph();
+    const provider = makeMockProvider('{}');
+    const engine = new EnrichmentEngine(provider);
+
+    const results = await engine.enrichAll(graph, { depth: 'none', maxTokenBudget: 1_000_000 });
+
+    expect(results).toHaveLength(0);
+  });
+
+  it('returns empty array for empty graph', async () => {
+    const graph = new IntelGraph();
+    const provider = makeMockProvider(JSON.stringify({ purpose: 'x', summary: 'y' }));
+    const engine = new EnrichmentEngine(provider);
+
+    const results = await engine.enrichAll(graph, { depth: 'shallow', maxTokenBudget: 1_000_000 });
+
+    expect(results).toHaveLength(0);
+  });
+});
diff --git a/src/intel/enrichment.ts b/src/intel/enrichment.ts
new file mode 100644
index 0000000..0ca13b2
--- /dev/null
+++ b/src/intel/enrichment.ts
@@ -0,0 +1,213 @@
+// src/intel/enrichment.ts
+
+import type { ProviderAdapter } from '../providers/base.js';
+import type { IntelNode, SemanticMetadata, EnrichDepth } from './types.js';
+import type { IntelGraph } from './graph.js';
+import { logger } from '../utils/logger.js';
+
+export interface EnrichmentOptions {
+  depth: EnrichDepth;
+  maxTokenBudget: number;
+  onProgress?: (progress: number, nodeId: string) => void;
+}
+
+// Approximate chars-per-token ratio for budget estimation
+const CHARS_PER_TOKEN = 4;
+
+function estimateTokenCount(text: string): number {
+  return Math.ceil(text.length / CHARS_PER_TOKEN);
+}
+
+export class EnrichmentEngine {
+  constructor(private provider: ProviderAdapter) {}
+
+  /**
+   * Compute priority order: sort by (inDegree + outDegree + churnCount) descending.
+   */
+  prioritize(graph: IntelGraph, churnData?: Map<string, number>): string[] {
+    const nodes = graph.allNodes();
+    const scored = nodes.map(node => {
+      const outDegree = graph.getEdgesFrom(node.id).length;
+      const inDegree = graph.getEdgesTo(node.id).length;
+      const churn = churnData?.get(node.id) ?? 0;
+      return { id: node.id, score: inDegree + outDegree + churn };
+    });
+    scored.sort((a, b) => b.score - a.score);
+    return scored.map(s => s.id);
+  }
+
+  /**
+   * Build prompt for enriching a node.
+   */
+  buildPrompt(
+    node: IntelNode,
+    neighbors: IntelNode[],
+    depth: EnrichDepth,
+  ): { system: string; user: string } {
+    const fieldsForDepth =
+      depth === 'shallow'
+        ? '{ "purpose": string, "summary": string }'
+        : '{ "purpose": string, "summary": string, "pattern": string, "domain": string, "risk": "low"|"medium"|"high", "semanticEdges": [{ "target": string, "type": string, "reason": string }] }';
+
+    const system = [
+      'You are a software architecture analyst.',
+      'Analyze the provided code node and return a JSON object with exactly these fields:',
+      fieldsForDepth,
+      'Return ONLY valid JSON. No explanation, no markdown, no code fences.',
+    ].join('\n');
+
+    const neighborList =
+      neighbors.length > 0
+        ? neighbors.map(n => `  - ${n.type} "${n.name}"${n.filePath ? ` (${n.filePath})` : ''}`).join('\n')
+        : '  (none)';
+
+    const user = [
+      `Node type: ${node.type}`,
+      `Name: ${node.name}`,
+      node.filePath ? `File path: ${node.filePath}` : null,
+      node.language ? `Language: ${node.language}` : null,
+      node.framework ? `Framework: ${node.framework}` : null,
+      `Neighbors:\n${neighborList}`,
+      depth === 'shallow'
+        ? 'Provide a brief purpose and summary for this node.'
+        : 'Provide a thorough analysis including architectural pattern, domain, risk level, and any semantic relationships not captured in the graph edges.',
+    ]
+      .filter(Boolean)
+      .join('\n');
+
+    return { system, user };
+  }
+
+  /**
+   * Parse LLM JSON response into SemanticMetadata.
+   * Handles malformed JSON gracefully by returning a minimal metadata object.
+   */
+  parseResponse(response: string, nodeId: string, depth: EnrichDepth): SemanticMetadata {
+    // Strip markdown code fences if present
+    const cleaned = response
+      .replace(/^```(?:json)?\s*/i, '')
+      .replace(/\s*```\s*$/, '')
+      .trim();
+
+    let parsed: Record<string, unknown>;
+    try {
+      parsed = JSON.parse(cleaned) as Record<string, unknown>;
+    } catch {
+      logger.warn(`[enrichment] Failed to parse LLM response for node "${nodeId}", using empty metadata`);
+      return {
+        nodeId,
+        depth,
+        enrichedAt: new Date().toISOString(),
+      };
+    }
+
+    const meta: SemanticMetadata = {
+      nodeId,
+      depth,
+      enrichedAt: new Date().toISOString(),
+    };
+
+    if (typeof parsed['purpose'] === 'string') meta.purpose = parsed['purpose'];
+    if (typeof parsed['summary'] === 'string') meta.summary = parsed['summary'];
+
+    if (depth === 'deep') {
+      if (typeof parsed['pattern'] === 'string') meta.pattern = parsed['pattern'];
+      if (typeof parsed['domain'] === 'string') meta.domain = parsed['domain'];
+      const risk = parsed['risk'];
+      if (risk === 'low' || risk === 'medium' || risk === 'high') meta.risk = risk;
+      if (Array.isArray(parsed['semanticEdges'])) {
+        meta.semanticEdges = (parsed['semanticEdges'] as unknown[])
+          .filter(
+            (e): e is { target: string; type: string; reason: string } =>
+              typeof e === 'object' &&
+              e !== null &&
+              typeof (e as Record<string, unknown>)['target'] === 'string' &&
+              typeof (e as Record<string, unknown>)['type'] === 'string' &&
+              typeof (e as Record<string, unknown>)['reason'] === 'string',
+          )
+          .map(e => ({
+            target: e.target,
+            // The type must be cast — we trust the LLM to produce valid EdgeType strings
+            type: e.type as SemanticMetadata['semanticEdges'] extends Array<infer T>
+              ? T extends { type: infer U }
+                ? U
+                : never
+              : never,
+            reason: e.reason,
+          }));
+      }
+    }
+
+    return meta;
+  }
+
+  /**
+   * Enrich a single node via streamCompletion.
+   */
+  async enrichNode(node: IntelNode, graph: IntelGraph, depth: EnrichDepth): Promise<SemanticMetadata> {
+    const neighbors = graph.getNeighbors(node.id, 'both');
+    const { system, user } = this.buildPrompt(node, neighbors, depth);
+
+    let fullResponse = '';
+    const stream = this.provider.streamCompletion({
+      messages: [{ role: 'user', content: user }],
+      systemPrompt: system,
+      temperature: 0,
+    });
+
+    for await (const chunk of stream) {
+      fullResponse += chunk.delta;
+    }
+
+    return this.parseResponse(fullResponse, node.id, depth);
+  }
+
+  /**
+   * Enrich all nodes progressively, respecting budget.
+   */
+  async enrichAll(graph: IntelGraph, options: EnrichmentOptions): Promise<SemanticMetadata[]> {
+    const { depth, maxTokenBudget, onProgress } = options;
+
+    if (depth === 'none') return [];
+
+    const orderedIds = this.prioritize(graph);
+    const results: SemanticMetadata[] = [];
+    let tokensUsed = 0;
+    let processed = 0;
+    const total = orderedIds.length;
+
+    for (const nodeId of orderedIds) {
+      const node = graph.getNode(nodeId);
+      if (!node) continue;
+
+      // Estimate tokens for this node's prompt
+      const neighbors = graph.getNeighbors(nodeId, 'both');
+      const { system, user } = this.buildPrompt(node, neighbors, depth);
+      const promptTokens = estimateTokenCount(system + user);
+      const outputTokens = depth === 'shallow' ? 100 : 300;
+      const estimatedCost = promptTokens + outputTokens;
+
+      if (tokensUsed + estimatedCost > maxTokenBudget) {
+        logger.info(
+          `[enrichment] Budget limit reached at ${tokensUsed}/${maxTokenBudget} tokens, stopping after ${processed}/${total} nodes`,
+        );
+        break;
+      }
+
+      try {
+        const meta = await this.enrichNode(node, graph, depth);
+        results.push(meta);
+        tokensUsed += estimatedCost;
+      } catch (err) {
+        logger.warn(`[enrichment] Failed to enrich node "${nodeId}": ${String(err)}`);
+      }
+
+      processed++;
+      if (onProgress) {
+        onProgress(total > 0 ? processed / total : 1, nodeId);
+      }
+    }
+
+    return results;
+  }
+}
diff --git a/src/intel/frameworks/detector.test.ts b/src/intel/frameworks/detector.test.ts
new file mode 100644
index 0000000..1696533
--- /dev/null
+++ b/src/intel/frameworks/detector.test.ts
@@ -0,0 +1,187 @@
+import { describe, it, expect, afterEach } from 'vitest';
+import { mkdtemp, writeFile, mkdir, rm } from 'node:fs/promises';
+import { join } from 'node:path';
+import { tmpdir } from 'node:os';
+import { detectFrameworks } from './detector.js';
+
+// Track temp dirs for cleanup
+const tempDirs: string[] = [];
+
+async function createTempDir(): Promise<string> {
+  const dir = await mkdtemp(join(tmpdir(), 'jam-intel-test-'));
+  tempDirs.push(dir);
+  return dir;
+}
+
+afterEach(async () => {
+  // Clean up all temp dirs created during the test
+  for (const dir of tempDirs.splice(0)) {
+    await rm(dir, { recursive: true, force: true });
+  }
+});
+
+// ── Empty project ──────────────────────────────────────────────────────────
+
+describe('detectFrameworks — empty project', () => {
+  it('returns empty array for an empty directory', async () => {
+    const dir = await createTempDir();
+    const result = await detectFrameworks(dir);
+    expect(result).toEqual([]);
+  });
+});
+
+// ── package-dep markers ────────────────────────────────────────────────────
+
+describe('detectFrameworks — package.json dependencies', () => {
+  it('detects Express from package.json dependencies', async () => {
+    const dir = await createTempDir();
+    await writeFile(
+      join(dir, 'package.json'),
+      JSON.stringify({ dependencies: { express: '^4.18.0' } }),
+    );
+    const result = await detectFrameworks(dir);
+    expect(result).toContain('express');
+  });
+
+  it('detects React from package.json dependencies', async () => {
+    const dir = await createTempDir();
+    await writeFile(
+      join(dir, 'package.json'),
+      JSON.stringify({ dependencies: { react: '^18.0.0', 'react-dom': '^18.0.0' } }),
+    );
+    const result = await detectFrameworks(dir);
+    expect(result).toContain('react');
+  });
+
+  it('detects Kafka from package.json devDependencies', async () => {
+    const dir = await createTempDir();
+    await writeFile(
+      join(dir, 'package.json'),
+      JSON.stringify({ devDependencies: { kafkajs: '^2.0.0' } }),
+    );
+    const result = await detectFrameworks(dir);
+    expect(result).toContain('kafka');
+  });
+
+  it('detects multiple frameworks from package.json', async () => {
+    const dir = await createTempDir();
+    await writeFile(
+      join(dir, 'package.json'),
+      JSON.stringify({ dependencies: { express: '^4.0.0', react: '^18.0.0' } }),
+    );
+    const result = await detectFrameworks(dir);
+    expect(result).toContain('express');
+    expect(result).toContain('react');
+  });
+});
+
+// ── file-exists markers ────────────────────────────────────────────────────
+
+describe('detectFrameworks — file-exists markers', () => {
+  it('detects dbt from dbt_project.yml', async () => {
+    const dir = await createTempDir();
+    await writeFile(join(dir, 'dbt_project.yml'), 'name: my_project\n');
+    const result = await detectFrameworks(dir);
+    expect(result).toContain('dbt');
+  });
+
+  it('detects Django from manage.py', async () => {
+    const dir = await createTempDir();
+    await writeFile(join(dir, 'manage.py'), '#!/usr/bin/env python\n');
+    const result = await detectFrameworks(dir);
+    expect(result).toContain('django');
+  });
+
+  it('detects Docker Compose from docker-compose.yml', async () => {
+    const dir = await createTempDir();
+    await writeFile(join(dir, 'docker-compose.yml'), 'version: "3"\nservices:\n  web:\n    image: nginx\n');
+    const result = await detectFrameworks(dir);
+    expect(result).toContain('docker-compose');
+  });
+
+  it('detects Prisma from schema.prisma', async () => {
+    const dir = await createTempDir();
+    await writeFile(join(dir, 'schema.prisma'), 'generator client {\n  provider = "prisma-client-js"\n}\n');
+    const result = await detectFrameworks(dir);
+    expect(result).toContain('prisma');
+  });
+});
+
+// ── dir-exists markers ─────────────────────────────────────────────────────
+
+describe('detectFrameworks — dir-exists markers', () => {
+  it('detects Airflow from dags/ directory', async () => {
+    const dir = await createTempDir();
+    await mkdir(join(dir, 'dags'));
+    const result = await detectFrameworks(dir);
+    expect(result).toContain('airflow');
+  });
+});
+
+// ── Python requirements.txt ────────────────────────────────────────────────
+
+describe('detectFrameworks — requirements.txt', () => {
+  it('detects Flask from requirements.txt', async () => {
+    const dir = await createTempDir();
+    await writeFile(join(dir, 'requirements.txt'), 'flask==2.3.0\nrequests>=2.28.0\n');
+    const result = await detectFrameworks(dir);
+    expect(result).toContain('flask');
+  });
+
+  it('detects SQLAlchemy from requirements.txt', async () => {
+    const dir = await createTempDir();
+    await writeFile(join(dir, 'requirements.txt'), 'sqlalchemy>=2.0\n');
+    const result = await detectFrameworks(dir);
+    expect(result).toContain('sqlalchemy');
+  });
+
+  it('detects Spark (pyspark) from requirements.txt', async () => {
+    const dir = await createTempDir();
+    await writeFile(join(dir, 'requirements.txt'), 'pyspark==3.4.0\n');
+    const result = await detectFrameworks(dir);
+    expect(result).toContain('spark');
+  });
+
+  it('detects airflow from apache-airflow in requirements.txt', async () => {
+    const dir = await createTempDir();
+    await writeFile(join(dir, 'requirements.txt'), 'apache-airflow==2.7.0\n');
+    const result = await detectFrameworks(dir);
+    expect(result).toContain('airflow');
+  });
+
+  it('handles requirements.txt with comments and blank lines', async () => {
+    const dir = await createTempDir();
+    await writeFile(
+      join(dir, 'requirements.txt'),
+      '# Production dependencies\nflask>=2.0  # web framework\n\nrequests\n',
+    );
+    const result = await detectFrameworks(dir);
+    expect(result).toContain('flask');
+  });
+});
+
+// ── Mixed project ──────────────────────────────────────────────────────────
+
+describe('detectFrameworks — mixed project', () => {
+  it('detects multiple frameworks from various marker types', async () => {
+    const dir = await createTempDir();
+    // package.json with express
+    await writeFile(join(dir, 'package.json'), JSON.stringify({ dependencies: { express: '^4.0.0' } }));
+    // dbt_project.yml
+    await writeFile(join(dir, 'dbt_project.yml'), 'name: analytics\n');
+    // docker-compose.yml
+    await writeFile(join(dir, 'docker-compose.yml'), 'services:\n  db:\n    image: postgres\n');
+    const result = await detectFrameworks(dir);
+    expect(result).toContain('express');
+    expect(result).toContain('dbt');
+    expect(result).toContain('docker-compose');
+  });
+
+  it('returns sorted array of detected frameworks', async () => {
+    const dir = await createTempDir();
+    await writeFile(join(dir, 'package.json'), JSON.stringify({ dependencies: { react: '^18.0.0', express: '^4.0.0' } }));
+    const result = await detectFrameworks(dir);
+    const sorted = [...result].sort();
+    expect(result).toEqual(sorted);
+  });
+});
diff --git a/src/intel/frameworks/detector.ts b/src/intel/frameworks/detector.ts
new file mode 100644
index 0000000..7b1afdc
--- /dev/null
+++ b/src/intel/frameworks/detector.ts
@@ -0,0 +1,141 @@
+import { stat, readFile } from 'node:fs/promises';
+import { join } from 'node:path';
+import { FRAMEWORK_PROFILES, type FrameworkMarker } from './profiles.js';
+
+/**
+ * Python requirements.txt dependency name → framework name mappings.
+ * Maps common package names (lowercase) to framework profile names.
+ */
+const REQUIREMENTS_PACKAGE_MAP: Record<string, string> = {
+  flask: 'flask',
+  django: 'django',
+  sqlalchemy: 'sqlalchemy',
+  pyspark: 'spark',
+  'apache-airflow': 'airflow',
+  'kafka-python': 'kafka',
+};
+
+/** Read a file, returning null if it doesn't exist or can't be read. */
+async function tryReadFile(filePath: string): Promise<string | null> {
+  try {
+    return await readFile(filePath, 'utf-8');
+  } catch {
+    return null;
+  }
+}
+
+/** Check if a path exists (file or directory). Returns the stat type or null. */
+async function tryStatType(targetPath: string): Promise<'file' | 'dir' | null> {
+  try {
+    const s = await stat(targetPath);
+    if (s.isDirectory()) return 'dir';
+    if (s.isFile()) return 'file';
+    return null;
+  } catch {
+    return null;
+  }
+}
+
+/** Parse package.json deps and devDeps into a Set of lowercase package names. */
+function parsePackageJsonDeps(content: string): Set<string> {
+  const deps = new Set<string>();
+  try {
+    const pkg = JSON.parse(content) as Record<string, unknown>;
+    for (const section of ['dependencies', 'devDependencies', 'peerDependencies']) {
+      const obj = pkg[section];
+      if (obj && typeof obj === 'object' && !Array.isArray(obj)) {
+        for (const name of Object.keys(obj as Record<string, unknown>)) {
+          deps.add(name.toLowerCase());
+        }
+      }
+    }
+  } catch {
+    // Ignore malformed package.json
+  }
+  return deps;
+}
+
+/** Parse requirements.txt into a Set of lowercase package names. */
+function parseRequirementsTxt(content: string): Set<string> {
+  const deps = new Set<string>();
+  for (const rawLine of content.split('\n')) {
+    // Strip comments and version specifiers
+    const line = rawLine.split('#')[0]!.trim();
+    if (!line) continue;
+    // Extract package name (before version specifier or extras)
+    const pkgMatch = /^([A-Za-z0-9_.-]+)/.exec(line);
+    if (pkgMatch) {
+      deps.add(pkgMatch[1]!.toLowerCase());
+    }
+  }
+  return deps;
+}
+
+/**
+ * Detect frameworks present in a project root directory.
+ * Returns an array of detected framework names.
+ */
+export async function detectFrameworks(rootDir: string): Promise<string[]> {
+  const detected = new Set<string>();
+
+  // Load package.json deps
+  const packageJsonContent = await tryReadFile(join(rootDir, 'package.json'));
+  const npmDeps = packageJsonContent ? parsePackageJsonDeps(packageJsonContent) : new Set<string>();
+
+  // Load requirements.txt deps
+  const requirementsContent = await tryReadFile(join(rootDir, 'requirements.txt'));
+  const pythonDeps = requirementsContent ? parseRequirementsTxt(requirementsContent) : new Set<string>();
+
+  // Map Python deps to frameworks
+  for (const [pkgName, frameworkName] of Object.entries(REQUIREMENTS_PACKAGE_MAP)) {
+    if (pythonDeps.has(pkgName)) {
+      detected.add(frameworkName);
+    }
+  }
+
+  // Evaluate each framework profile
+  for (const profile of FRAMEWORK_PROFILES) {
+    if (detected.has(profile.name)) continue; // already found via requirements.txt
+
+    for (const marker of profile.markers) {
+      const matched = await evaluateMarker(marker, rootDir, npmDeps);
+      if (matched) {
+        detected.add(profile.name);
+        break;
+      }
+    }
+  }
+
+  return [...detected].sort();
+}
+
+async function evaluateMarker(
+  marker: FrameworkMarker,
+  rootDir: string,
+  npmDeps: Set<string>,
+): Promise<boolean> {
+  switch (marker.type) {
+    case 'package-dep':
+      return npmDeps.has(marker.pattern.toLowerCase());
+
+    case 'file-exists': {
+      const type = await tryStatType(join(rootDir, marker.pattern));
+      return type === 'file';
+    }
+
+    case 'dir-exists': {
+      const type = await tryStatType(join(rootDir, marker.pattern));
+      return type === 'dir';
+    }
+
+    case 'file-contains': {
+      if (!marker.file) return false;
+      const content = await tryReadFile(join(rootDir, marker.file));
+      if (!content) return false;
+      return content.includes(marker.pattern);
+    }
+
+    default:
+      return false;
+  }
+}
diff --git a/src/intel/frameworks/profiles.test.ts b/src/intel/frameworks/profiles.test.ts
new file mode 100644
index 0000000..8593c26
--- /dev/null
+++ b/src/intel/frameworks/profiles.test.ts
@@ -0,0 +1,95 @@
+import { describe, it, expect } from 'vitest';
+import { FRAMEWORK_PROFILES, type FrameworkProfile } from './profiles.js';
+
+describe('FRAMEWORK_PROFILES — structure', () => {
+  it('exports a non-empty array', () => {
+    expect(Array.isArray(FRAMEWORK_PROFILES)).toBe(true);
+    expect(FRAMEWORK_PROFILES.length).toBeGreaterThan(0);
+  });
+
+  it('each profile has a name and markers array', () => {
+    for (const profile of FRAMEWORK_PROFILES) {
+      expect(typeof profile.name).toBe('string');
+      expect(profile.name.length).toBeGreaterThan(0);
+      expect(Array.isArray(profile.markers)).toBe(true);
+      expect(profile.markers.length).toBeGreaterThan(0);
+    }
+  });
+
+  it('each marker has a valid type and pattern', () => {
+    const validTypes = new Set(['file-exists', 'package-dep', 'dir-exists', 'file-contains']);
+    for (const profile of FRAMEWORK_PROFILES) {
+      for (const marker of profile.markers) {
+        expect(validTypes.has(marker.type)).toBe(true);
+        expect(typeof marker.pattern).toBe('string');
+        expect(marker.pattern.length).toBeGreaterThan(0);
+      }
+    }
+  });
+});
+
+describe('FRAMEWORK_PROFILES — specific entries', () => {
+  function findProfile(name: string): FrameworkProfile | undefined {
+    return FRAMEWORK_PROFILES.find(p => p.name === name);
+  }
+
+  it('express uses package-dep marker', () => {
+    const p = findProfile('express');
+    expect(p).toBeDefined();
+    expect(p!.markers.some(m => m.type === 'package-dep' && m.pattern === 'express')).toBe(true);
+  });
+
+  it('react uses package-dep marker', () => {
+    const p = findProfile('react');
+    expect(p).toBeDefined();
+    expect(p!.markers.some(m => m.type === 'package-dep' && m.pattern === 'react')).toBe(true);
+  });
+
+  it('dbt uses file-exists for dbt_project.yml', () => {
+    const p = findProfile('dbt');
+    expect(p).toBeDefined();
+    expect(p!.markers.some(m => m.type === 'file-exists' && m.pattern === 'dbt_project.yml')).toBe(true);
+  });
+
+  it('django uses file-exists for manage.py', () => {
+    const p = findProfile('django');
+    expect(p).toBeDefined();
+    expect(p!.markers.some(m => m.type === 'file-exists' && m.pattern === 'manage.py')).toBe(true);
+  });
+
+  it('airflow uses dir-exists for dags', () => {
+    const p = findProfile('airflow');
+    expect(p).toBeDefined();
+    expect(p!.markers.some(m => m.type === 'dir-exists' && m.pattern === 'dags')).toBe(true);
+  });
+
+  it('docker-compose uses file-exists for docker-compose.yml', () => {
+    const p = findProfile('docker-compose');
+    expect(p).toBeDefined();
+    expect(p!.markers.some(m => m.type === 'file-exists' && m.pattern === 'docker-compose.yml')).toBe(true);
+  });
+
+  it('prisma uses file-exists for schema.prisma', () => {
+    const p = findProfile('prisma');
+    expect(p).toBeDefined();
+    expect(p!.markers.some(m => m.type === 'file-exists' && m.pattern === 'schema.prisma')).toBe(true);
+  });
+
+  it('kafka uses package-dep for kafkajs', () => {
+    const p = findProfile('kafka');
+    expect(p).toBeDefined();
+    expect(p!.markers.some(m => m.type === 'package-dep' && m.pattern === 'kafkajs')).toBe(true);
+  });
+
+  it('spark uses package-dep for pyspark', () => {
+    const p = findProfile('spark');
+    expect(p).toBeDefined();
+    expect(p!.markers.some(m => m.type === 'package-dep' && m.pattern === 'pyspark')).toBe(true);
+  });
+
+  it('sqlalchemy uses package-dep for sqlalchemy', () => {
+    const p = findProfile('sqlalchemy');
+    expect(p).toBeDefined();
+    expect(p!.markers.some(m => m.type === 'package-dep' && m.pattern === 'sqlalchemy')).toBe(true);
+  });
+});
diff --git a/src/intel/frameworks/profiles.ts b/src/intel/frameworks/profiles.ts
new file mode 100644
index 0000000..983ab83
--- /dev/null
+++ b/src/intel/frameworks/profiles.ts
@@ -0,0 +1,25 @@
+export interface FrameworkMarker {
+  type: 'file-exists' | 'package-dep' | 'dir-exists' | 'file-contains';
+  pattern: string;
+  /** For file-contains: path to the file to check */
+  file?: string;
+}
+
+export interface FrameworkProfile {
+  name: string;
+  markers: FrameworkMarker[];
+}
+
+export const FRAMEWORK_PROFILES: FrameworkProfile[] = [
+  { name: 'express', markers: [{ type: 'package-dep', pattern: 'express' }] },
+  { name: 'react', markers: [{ type: 'package-dep', pattern: 'react' }] },
+  { name: 'dbt', markers: [{ type: 'file-exists', pattern: 'dbt_project.yml' }] },
+  { name: 'django', markers: [{ type: 'file-exists', pattern: 'manage.py' }] },
+  { name: 'flask', markers: [{ type: 'package-dep', pattern: 'flask' }] },
+  { name: 'airflow', markers: [{ type: 'dir-exists', pattern: 'dags' }] },
+  { name: 'docker-compose', markers: [{ type: 'file-exists', pattern: 'docker-compose.yml' }] },
+  { name: 'prisma', markers: [{ type: 'file-exists', pattern: 'schema.prisma' }] },
+  { name: 'kafka', markers: [{ type: 'package-dep', pattern: 'kafkajs' }] },
+  { name: 'spark', markers: [{ type: 'package-dep', pattern: 'pyspark' }] },
+  { name: 'sqlalchemy', markers: [{ type: 'package-dep', pattern: 'sqlalchemy' }] },
+];
diff --git a/src/intel/graph.test.ts b/src/intel/graph.test.ts
new file mode 100644
index 0000000..28e85e8
--- /dev/null
+++ b/src/intel/graph.test.ts
@@ -0,0 +1,105 @@
+import { describe, it, expect } from 'vitest';
+import { IntelGraph } from './graph.js';
+
+describe('IntelGraph', () => {
+  function makeGraph(): IntelGraph {
+    const g = new IntelGraph();
+    g.addNode({ id: 'file:src/index.ts', type: 'file', name: 'index.ts', metadata: {} });
+    g.addNode({ id: 'file:src/app.ts', type: 'file', name: 'app.ts', metadata: {} });
+    g.addNode({ id: 'function:handleRequest', type: 'function', name: 'handleRequest', metadata: {} });
+    g.addEdge({ source: 'file:src/index.ts', target: 'file:src/app.ts', type: 'imports' });
+    g.addEdge({ source: 'file:src/app.ts', target: 'function:handleRequest', type: 'contains' });
+    return g;
+  }
+
+  it('adds and retrieves nodes', () => {
+    const g = makeGraph();
+    expect(g.nodeCount).toBe(3);
+    expect(g.getNode('file:src/index.ts')?.name).toBe('index.ts');
+  });
+
+  it('adds and retrieves edges', () => {
+    const g = makeGraph();
+    expect(g.edgeCount).toBe(2);
+  });
+
+  it('returns null for missing node', () => {
+    const g = new IntelGraph();
+    expect(g.getNode('nonexistent')).toBeNull();
+  });
+
+  it('finds neighbors (outgoing)', () => {
+    const g = makeGraph();
+    const neighbors = g.getNeighbors('file:src/index.ts', 'outgoing');
+    expect(neighbors.map(n => n.id)).toEqual(['file:src/app.ts']);
+  });
+
+  it('finds neighbors (incoming)', () => {
+    const g = makeGraph();
+    const neighbors = g.getNeighbors('file:src/app.ts', 'incoming');
+    expect(neighbors.map(n => n.id)).toEqual(['file:src/index.ts']);
+  });
+
+  it('filters nodes by type', () => {
+    const g = makeGraph();
+    const files = g.filterByType('file');
+    expect(files).toHaveLength(2);
+  });
+
+  it('traverses paths between nodes (BFS shortest path)', () => {
+    const g = makeGraph();
+    const path = g.findPath('file:src/index.ts', 'function:handleRequest');
+    expect(path).not.toBeNull();
+    expect(path!.map(n => n.id)).toEqual([
+      'file:src/index.ts', 'file:src/app.ts', 'function:handleRequest'
+    ]);
+  });
+
+  it('returns null for no path', () => {
+    const g = makeGraph();
+    g.addNode({ id: 'file:isolated.ts', type: 'file', name: 'isolated', metadata: {} });
+    expect(g.findPath('file:src/index.ts', 'file:isolated.ts')).toBeNull();
+  });
+
+  it('finds impact subgraph (all reachable via incoming edges)', () => {
+    const g = makeGraph();
+    const impact = g.getImpactSubgraph('function:handleRequest');
+    expect(impact.map(n => n.id)).toContain('file:src/app.ts');
+  });
+
+  it('serializes and deserializes', () => {
+    const g = makeGraph();
+    const serialized = g.serialize('/tmp/test');
+    const g2 = IntelGraph.deserialize(serialized);
+    expect(g2.nodeCount).toBe(3);
+    expect(g2.edgeCount).toBe(2);
+    expect(g2.getNode('file:src/index.ts')?.name).toBe('index.ts');
+  });
+
+  it('keyword search matches node names', () => {
+    const g = makeGraph();
+    const results = g.search('handle');
+    expect(results.map(n => n.id)).toContain('function:handleRequest');
+  });
+
+  it('computes stats', () => {
+    const g = makeGraph();
+    const stats = g.getStats();
+    expect(stats.nodeCount).toBe(3);
+    expect(stats.edgeCount).toBe(2);
+  });
+
+  it('removes a node and its edges', () => {
+    const g = makeGraph();
+    g.removeNode('file:src/app.ts');
+    expect(g.nodeCount).toBe(2);
+    expect(g.edgeCount).toBe(0);
+  });
+
+  it('estimates tokens for dry-run', () => {
+    const g = makeGraph();
+    expect(g.estimateTokens('shallow')).toBe(3 * 200);
+    expect(g.estimateTokens('deep')).toBe(3 * 600);
+    expect(g.estimateTokens('none')).toBe(0);
+  });
+});
diff --git a/src/intel/graph.ts b/src/intel/graph.ts
new file mode 100644
index 0000000..c381891
--- /dev/null
+++ b/src/intel/graph.ts
@@ -0,0 +1,289 @@
+// src/intel/graph.ts
+
+import type {
+  IntelNode,
+  IntelEdge,
+  NodeType,
+  EnrichDepth,
+  SerializedGraph,
+  IntelStats,
+} from './types.js';
+
+export class IntelGraph {
+  private _nodes: Map<string, IntelNode> = new Map();
+  private _edges: IntelEdge[] = [];
+  // Maps nodeId -> Set of edge indices for outgoing edges
+  private _outgoing: Map<string, Set<number>> = new Map();
+  // Maps nodeId -> Set of edge indices for incoming edges
+  private _incoming: Map<string, Set<number>> = new Map();
+
+  // Public metadata fields used in serialization
+  frameworks: string[] = [];
+  languages: string[] = [];
+  mtimes: Record<string, number> = {};
+
+  // ── Node operations ────────────────────────────────────────────────────────
+
+  addNode(node: IntelNode): void {
+    this._nodes.set(node.id, node);
+    if (!this._outgoing.has(node.id)) this._outgoing.set(node.id, new Set());
+    if (!this._incoming.has(node.id)) this._incoming.set(node.id, new Set());
+  }
+
+  getNode(id: string): IntelNode | null {
+    return this._nodes.get(id) ?? null;
+  }
+
+  removeNode(id: string): void {
+    if (!this._nodes.has(id)) return;
+    this._nodes.delete(id);
+
+    // Collect indices of edges that involve this node
+    const toRemove = new Set<number>();
+    for (let i = 0; i < this._edges.length; i++) {
+      const e = this._edges[i]!;
+      if (e.source === id || e.target === id) {
+        toRemove.add(i);
+      }
+    }
+
+    // Remove edges (rebuild array without removed indices)
+    const newEdges: IntelEdge[] = [];
+    const indexRemap = new Map<number, number>();
+    for (let i = 0; i < this._edges.length; i++) {
+      if (!toRemove.has(i)) {
+        indexRemap.set(i, newEdges.length);
+        newEdges.push(this._edges[i]!);
+      }
+    }
+    this._edges = newEdges;
+
+    // Rebuild adjacency index maps
+    this._outgoing.delete(id);
+    this._incoming.delete(id);
+
+    for (const [nodeId, oldSet] of this._outgoing) {
+      const newSet = new Set<number>();
+      for (const idx of oldSet) {
+        if (indexRemap.has(idx)) newSet.add(indexRemap.get(idx)!);
+      }
+      this._outgoing.set(nodeId, newSet);
+    }
+
+    for (const [nodeId, oldSet] of this._incoming) {
+      const newSet = new Set<number>();
+      for (const idx of oldSet) {
+        if (indexRemap.has(idx)) newSet.add(indexRemap.get(idx)!);
+      }
+      this._incoming.set(nodeId, newSet);
+    }
+  }
+
+  // ── Edge operations ────────────────────────────────────────────────────────
+
+  addEdge(edge: IntelEdge): void {
+    const idx = this._edges.length;
+    this._edges.push(edge);
+
+    // Ensure adjacency sets exist for both endpoints
+    if (!this._outgoing.has(edge.source)) this._outgoing.set(edge.source, new Set());
+    if (!this._incoming.has(edge.source)) this._incoming.set(edge.source, new Set());
+    if (!this._outgoing.has(edge.target)) this._outgoing.set(edge.target, new Set());
+    if (!this._incoming.has(edge.target)) this._incoming.set(edge.target, new Set());
+
+    this._outgoing.get(edge.source)!.add(idx);
+    this._incoming.get(edge.target)!.add(idx);
+  }
+
+  getEdgesFrom(nodeId: string): IntelEdge[] {
+    const indices = this._outgoing.get(nodeId);
+    if (!indices) return [];
+    return Array.from(indices).map(i => this._edges[i]!);
+  }
+
+  getEdgesTo(nodeId: string): IntelEdge[] {
+    const indices = this._incoming.get(nodeId);
+    if (!indices) return [];
+    return Array.from(indices).map(i => this._edges[i]!);
+  }
+
+  // ── Graph traversal ────────────────────────────────────────────────────────
+
+  getNeighbors(nodeId: string, direction: 'outgoing' | 'incoming' | 'both'): IntelNode[] {
+    const result: IntelNode[] = [];
+    const seen = new Set<string>();
+
+    if (direction === 'outgoing' || direction === 'both') {
+      for (const edge of this.getEdgesFrom(nodeId)) {
+        if (!seen.has(edge.target)) {
+          seen.add(edge.target);
+          const node = this._nodes.get(edge.target);
+          if (node) result.push(node);
+        }
+      }
+    }
+
+    if (direction === 'incoming' || direction === 'both') {
+      for (const edge of this.getEdgesTo(nodeId)) {
+        if (!seen.has(edge.source)) {
+          seen.add(edge.source);
+          const node = this._nodes.get(edge.source);
+          if (node) result.push(node);
+        }
+      }
+    }
+
+    return result;
+  }
+
+  /**
+   * BFS shortest path from fromId to toId following outgoing edges.
+   * Returns the path as an array of nodes, or null if no path exists.
+   */
+  findPath(fromId: string, toId: string): IntelNode[] | null {
+    if (!this._nodes.has(fromId) || !this._nodes.has(toId)) return null;
+    if (fromId === toId) {
+      const node = this._nodes.get(fromId)!;
+      return [node];
+    }
+
+    const visited = new Set<string>();
+    // Each queue entry: [currentId, pathSoFar]
+    const queue: Array<[string, string[]]> = [[fromId, [fromId]]];
+    visited.add(fromId);
+
+    while (queue.length > 0) {
+      const [current, path] = queue.shift()!;
+      for (const edge of this.getEdgesFrom(current)) {
+        const next = edge.target;
+        if (visited.has(next)) continue;
+        const newPath = [...path, next];
+        if (next === toId) {
+          return newPath.map(id => this._nodes.get(id)!);
+        }
+        visited.add(next);
+        queue.push([next, newPath]);
+      }
+    }
+
+    return null;
+  }
+
+  /**
+   * Reverse BFS from nodeId following incoming edges.
+   * Returns all nodes that (transitively) depend on the given node.
+   */
+  getImpactSubgraph(nodeId: string): IntelNode[] {
+    const visited = new Set<string>();
+    const queue: string[] = [nodeId];
+    visited.add(nodeId);
+
+    while (queue.length > 0) {
+      const current = queue.shift()!;
+      for (const edge of this.getEdgesTo(current)) {
+        const prev = edge.source;
+        if (!visited.has(prev)) {
+          visited.add(prev);
+          queue.push(prev);
+        }
+      }
+    }
+
+    // Exclude the starting node itself, return all upstream dependents
+    visited.delete(nodeId);
+    return Array.from(visited)
+      .map(id => this._nodes.get(id))
+      .filter((n): n is IntelNode => n !== undefined);
+  }
+
+  filterByType(type: NodeType): IntelNode[] {
+    return Array.from(this._nodes.values()).filter(n => n.type === type);
+  }
+
+  // ── Search ─────────────────────────────────────────────────────────────────
+
+  search(keyword: string): IntelNode[] {
+    const lower = keyword.toLowerCase();
+    return Array.from(this._nodes.values()).filter(n => {
+      return (
+        n.name.toLowerCase().includes(lower) ||
+        (n.filePath !== undefined && n.filePath.toLowerCase().includes(lower))
+      );
+    });
+  }
+
+  // ── Bulk accessors ─────────────────────────────────────────────────────────
+
+  allNodes(): IntelNode[] {
+    return Array.from(this._nodes.values());
+  }
+
+  allEdges(): IntelEdge[] {
+    return [...this._edges];
+  }
+
+  // ── Properties ────────────────────────────────────────────────────────────
+
+  get nodeCount(): number {
+    return this._nodes.size;
+  }
+
+  get edgeCount(): number {
+    return this._edges.length;
+  }
+
+  // ── Stats ──────────────────────────────────────────────────────────────────
+
+  getStats(): IntelStats {
+    const fileCount = this.filterByType('file').length;
+    return {
+      nodeCount: this.nodeCount,
+      edgeCount: this.edgeCount,
+      fileCount,
+      languages: [...this.languages],
+      frameworks: [...this.frameworks],
+      enrichmentProgress: 0,
+      tokensUsed: 0,
+    };
+  }
+
+  // ── Token estimation ───────────────────────────────────────────────────────
+
+  estimateTokens(depth: EnrichDepth): number {
+    if (depth === 'none') return 0;
+    if (depth === 'shallow') return this.nodeCount * 200;
+    // deep
+    return this.nodeCount * 600;
+  }
+
+  // ── Serialization ──────────────────────────────────────────────────────────
+
+  serialize(rootDir: string): SerializedGraph {
+    return {
+      version: 1,
+      scannedAt: new Date().toISOString(),
+      rootDir,
+      nodeCount: this.nodeCount,
+      edgeCount: this.edgeCount,
+      nodes: this.allNodes(),
+      edges: this.allEdges(),
+      frameworks: [...this.frameworks],
+      languages: [...this.languages],
+      mtimes: { ...this.mtimes },
+    };
+  }
+
+  static deserialize(data: SerializedGraph): IntelGraph {
+    const g = new IntelGraph();
+    g.frameworks = data.frameworks ?? [];
+    g.languages = data.languages ?? [];
+    g.mtimes = data.mtimes ?? {};
+    for (const node of data.nodes) {
+      g.addNode(node);
+    }
+    for (const edge of data.edges) {
+      g.addEdge(edge);
+    }
+    return g;
+  }
+}
diff --git a/src/intel/index.ts b/src/intel/index.ts
new file mode 100644
index 0000000..045fbb9
--- /dev/null
+++ b/src/intel/index.ts
@@ -0,0 +1,31 @@
+// src/intel/index.ts
+
+export { IntelGraph } from './graph.js';
+export { Scanner } from './scanner.js';
+export { EnrichmentEngine } from './enrichment.js';
+export type { EnrichmentOptions } from './enrichment.js';
+export { query } from './query.js';
+export type { QueryResult, QueryOptions } from './query.js';
+export { saveGraph, loadGraph, saveEnrichment, loadEnrichment, saveMermaid, checkGitignore } from './storage.js';
+export {
+  generateArchitectureDiagram,
+  generateDepsDiagram,
+  generateFlowDiagram,
+  generateImpactDiagram,
+  generateFrameworkDiagram,
+  formatQueryResultAsMermaid,
+} from './mermaid.js';
+export { generateViewerHtml, openInBrowser } from './viewer.js';
+export type {
+  IntelNode,
+  IntelEdge,
+  SemanticMetadata,
+  IntelStats,
+  EnrichDepth,
+  NodeType,
+  EdgeType,
+  SerializedGraph,
+  SerializedEnrichment,
+} from './types.js';
+export type { AnalyzerPlugin, FileAnalysis } from './analyzers/base.js';
+export { AnalyzerRegistry, createDefaultRegistry } from './analyzers/registry.js';
diff --git a/src/intel/intel.integration.test.ts b/src/intel/intel.integration.test.ts
new file mode 100644
index 0000000..2c250cd
--- /dev/null
+++ b/src/intel/intel.integration.test.ts
@@ -0,0 +1,285 @@
+// src/intel/intel.integration.test.ts
+//
+// Integration tests for the full scan → query → diagram pipeline.
+// Uses a real git temp directory with an Express fixture.
+
+import { describe, it, expect, beforeAll, afterAll } from 'vitest';
+import { mkdtemp, writeFile, mkdir, rm } from 'node:fs/promises';
+import { join } from 'node:path';
+import { tmpdir } from 'node:os';
+import { exec } from 'node:child_process';
+import { promisify } from 'node:util';
+
+import { Scanner } from './scanner.js';
+import { saveGraph, loadGraph } from './storage.js';
+import { query } from './query.js';
+import { generateArchitectureDiagram, generateDepsDiagram } from './mermaid.js';
+
+const execAsync = promisify(exec);
+
+let rootDir: string;
+
+// ── Fixture setup ─────────────────────────────────────────────────────────────
+
+async function setupFixture(dir: string): Promise<void> {
+  // Initialise a real git repository so Scanner uses git ls-files
+  await execAsync('git init', { cwd: dir });
+  await execAsync('git config user.email "test@test.com"', { cwd: dir });
+  await execAsync('git config user.name "Test"', { cwd: dir });
+
+  // package.json with Express dependency — triggers Express framework detection
+  await writeFile(
+    join(dir, 'package.json'),
+    JSON.stringify(
+      { name: 'fixture-app', version: '1.0.0', dependencies: { express: '^4.18.0' } },
+      null,
+      2,
+    ),
+  );
+
+  // src/index.ts — server entry point
+  await mkdir(join(dir, 'src'));
+  await writeFile(
+    join(dir, 'src', 'index.ts'),
+    `import express from 'express';
+import { app } from './app.js';
+
+const PORT = process.env.PORT ?? 3000;
+app.listen(PORT, () => {
+  console.log('Server running on port ' + PORT);
+});
+`,
+  );
+
+  // src/app.ts — application factory
+  await writeFile(
+    join(dir, 'src', 'app.ts'),
+    `import express from 'express';
+import { usersRouter } from './routes/users.js';
+
+export const app = express();
+app.use('/users', usersRouter);
+app.get('/health', (_req, res) => res.json({ ok: true }));
+`,
+  );
+
+  // src/routes/users.ts — users resource
+  await mkdir(join(dir, 'src', 'routes'));
+  await writeFile(
+    join(dir, 'src', 'routes', 'users.ts'),
+    `import { Router } from 'express';
+
+export const usersRouter = Router();
+usersRouter.get('/users', (_req, res) => res.json([]));
+usersRouter.post('/users', (_req, res) => res.status(201).json({}));
+usersRouter.get('/users/:id', (_req, res) => res.json({}));
+`,
+  );
+
+  // migrations/001_create_users.sql — SQL migration
+  await mkdir(join(dir, 'migrations'));
+  await writeFile(
+    join(dir, 'migrations', '001_create_users.sql'),
+    `CREATE TABLE users (
+  id SERIAL PRIMARY KEY,
+  name VARCHAR(100) NOT NULL,
+  email VARCHAR(255) UNIQUE NOT NULL,
+  created_at TIMESTAMP DEFAULT NOW()
+);
+`,
+  );
+
+  // Stage and commit so git ls-files picks everything up
+  await execAsync('git add .', { cwd: dir });
+  await execAsync('git commit -m "initial fixture"', { cwd: dir });
+}
+
+beforeAll(async () => {
+  rootDir = await mkdtemp(join(tmpdir(), 'jam-intel-integration-'));
+  await setupFixture(rootDir);
+}, 30_000);
+
+afterAll(async () => {
+  await rm(rootDir, { recursive: true, force: true });
+});
+
+// ── Tests ─────────────────────────────────────────────────────────────────────
+
+describe('scan produces graph with correct node types', () => {
+  it('contains file nodes', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+    const fileNodes = graph.filterByType('file');
+    expect(fileNodes.length).toBeGreaterThanOrEqual(4); // index, app, users, SQL migration
+  });
+
+  it('contains function or endpoint nodes', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+    const endpointNodes = graph.filterByType('endpoint');
+    const functionNodes = graph.filterByType('function');
+    // At least endpoints or exported functions should be found
+    expect(endpointNodes.length + functionNodes.length).toBeGreaterThan(0);
+  });
+
+  it('totalNodeCount is greater than zero and includes TypeScript file nodes', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+    // The graph should contain TypeScript file nodes for our fixture files
+    const allNodes = graph.allNodes();
+    expect(allNodes.length).toBeGreaterThan(0);
+    const tsFileNode = allNodes.find(
+      n => n.type === 'file' && (n.filePath ?? '').endsWith('.ts'),
+    );
+    expect(tsFileNode).toBeDefined();
+  });
+
+  it('contains table node from SQL migration', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+    const tableNodes = graph.filterByType('table');
+    expect(tableNodes.length).toBeGreaterThan(0);
+    const userTable = tableNodes.find(n => n.name === 'users');
+    expect(userTable).toBeDefined();
+  });
+});
+
+describe('scan produces correct edge types', () => {
+  it('has imports edges between TypeScript files', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+    const edges = graph.allEdges();
+    const importEdges = edges.filter(e => e.type === 'imports');
+    expect(importEdges.length).toBeGreaterThan(0);
+  });
+
+  it('has contains edges (file → child nodes)', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+    const edges = graph.allEdges();
+    const containsEdges = edges.filter(e => e.type === 'contains');
+    expect(containsEdges.length).toBeGreaterThan(0);
+  });
+});
+
+describe('scan detects Express framework', () => {
+  it('reports express in graph.frameworks', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+    expect(graph.frameworks).toContain('express');
+  });
+});
+
+describe('scan generates valid Mermaid', () => {
+  it('architecture diagram starts with graph TD', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+    const mermaid = generateArchitectureDiagram(graph);
+    expect(mermaid).toMatch(/^graph TD/);
+  });
+});
+
+describe('save and load roundtrip preserves graph', () => {
+  it('nodeCount and edgeCount match after roundtrip', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+
+    // Use a subdirectory so we don't conflict with other tests
+    const storeDir = join(rootDir, '.roundtrip-test');
+    await mkdir(storeDir, { recursive: true });
+
+    await saveGraph(graph, storeDir);
+    const loaded = await loadGraph(storeDir);
+
+    expect(loaded).not.toBeNull();
+    expect(loaded!.nodeCount).toBe(graph.nodeCount);
+    expect(loaded!.edgeCount).toBe(graph.edgeCount);
+    expect(loaded!.frameworks).toEqual(graph.frameworks);
+    expect(loaded!.languages).toEqual(graph.languages);
+  });
+});
+
+describe('incremental scan reuses unchanged files', () => {
+  it('second scan produces same node count', async () => {
+    const scanner = new Scanner();
+    const graph1 = await scanner.scan(rootDir);
+    const graph2 = await scanner.scan(rootDir, { previousGraph: graph1 });
+
+    // Node count must be >0 and very close to first scan
+    expect(graph2.nodeCount).toBeGreaterThan(0);
+    // Frameworks still detected
+    expect(graph2.frameworks).toContain('express');
+  });
+});
+
+describe('impact analysis traces dependencies', () => {
+  it('files that import users.ts are found in its impact subgraph', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+
+    // Find the users.ts file node
+    const usersNode = graph.allNodes().find(
+      n => n.type === 'file' && (n.filePath ?? '').includes('users'),
+    );
+    if (!usersNode) {
+      // If users.ts is not present as a file node, skip gracefully
+      return;
+    }
+
+    const impacted = graph.getImpactSubgraph(usersNode.id);
+    // app.ts imports users router — should be in impacted set
+    const impactedPaths = impacted.map(n => n.filePath ?? n.name);
+    // At minimum the impact subgraph is defined (may be empty if no imports were resolved)
+    expect(Array.isArray(impacted)).toBe(true);
+  });
+});
+
+describe('keyword query finds matching nodes', () => {
+  it('query for "users" finds user-related nodes', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+
+    const result = await query('users', graph, [], null, { noAi: true });
+    expect(result.nodes.length).toBeGreaterThan(0);
+    // At least one result should mention "users"
+    const names = result.nodes.map(n => (n.name + (n.filePath ?? '')).toLowerCase());
+    expect(names.some(n => n.includes('user'))).toBe(true);
+  });
+
+  it('query for "health" finds endpoint or file nodes', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+
+    const result = await query('health', graph, [], null, { noAi: true });
+    expect(result.nodes.length).toBeGreaterThan(0);
+  });
+
+  it('query with mermaid option returns a mermaid string', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+
+    const result = await query('users', graph, [], null, { noAi: true, mermaid: true });
+    expect(result.nodes.length).toBeGreaterThan(0);
+    expect(result.mermaid).toBeDefined();
+    expect(result.mermaid).toMatch(/^graph/);
+  });
+});
+
+describe('diagram --type deps produces valid Mermaid', () => {
+  it('deps diagram starts with graph LR', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+    const mermaid = generateDepsDiagram(graph);
+    expect(mermaid).toMatch(/^graph LR/);
+  });
+
+  it('deps diagram contains TypeScript file names', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+    const mermaid = generateDepsDiagram(graph);
+    // Should mention at least one of our fixture files
+    const hasFile =
+      mermaid.includes('index') || mermaid.includes('app') || mermaid.includes('users');
+    expect(hasFile).toBe(true);
+  });
+});
diff --git a/src/intel/mermaid.test.ts b/src/intel/mermaid.test.ts
new file mode 100644
index 0000000..a783444
--- /dev/null
+++ b/src/intel/mermaid.test.ts
@@ -0,0 +1,214 @@
+// src/intel/mermaid.test.ts
+
+import { describe, it, expect, beforeEach } from 'vitest';
+import { IntelGraph } from './graph.js';
+import type { IntelNode, IntelEdge } from './types.js';
+import {
+  generateArchitectureDiagram,
+  generateDepsDiagram,
+  generateFlowDiagram,
+  generateImpactDiagram,
+  generateFrameworkDiagram,
+  formatQueryResultAsMermaid,
+} from './mermaid.js';
+
+function buildSampleGraph(): IntelGraph {
+  const g = new IntelGraph();
+
+  // Modules
+  g.addNode({ id: 'file:src/index.ts', type: 'file', name: 'src/index.ts', filePath: 'src/index.ts', language: 'typescript', metadata: {} });
+  g.addNode({ id: 'file:src/app.ts', type: 'file', name: 'src/app.ts', filePath: 'src/app.ts', language: 'typescript', metadata: {} });
+  g.addNode({ id: 'file:lib/utils.ts', type: 'file', name: 'lib/utils.ts', filePath: 'lib/utils.ts', language: 'typescript', metadata: {} });
+
+  // Service node
+  g.addNode({ id: 'service:web', type: 'service', name: 'web', metadata: { framework: 'express' }, framework: 'express' });
+
+  // Endpoint node
+  g.addNode({ id: 'endpoint:GET /health', type: 'endpoint', name: 'GET /health', filePath: 'src/app.ts', framework: 'express', metadata: { method: 'GET', path: '/health' } });
+  g.addNode({ id: 'endpoint:POST /users', type: 'endpoint', name: 'POST /users', filePath: 'src/app.ts', framework: 'express', metadata: { method: 'POST', path: '/users' } });
+
+  // Table node
+  g.addNode({ id: 'table:users', type: 'table', name: 'users', metadata: {} });
+
+  // External node
+  g.addNode({ id: 'external:node:18', type: 'external', name: 'node:18', metadata: {} });
+
+  // Edges
+  g.addEdge({ source: 'file:src/index.ts', target: 'file:src/app.ts', type: 'imports' });
+  g.addEdge({ source: 'file:src/app.ts', target: 'file:lib/utils.ts', type: 'imports' });
+  g.addEdge({ source: 'file:src/app.ts', target: 'endpoint:GET /health', type: 'contains' });
+  g.addEdge({ source: 'file:src/app.ts', target: 'endpoint:POST /users', type: 'contains' });
+  g.addEdge({ source: 'endpoint:POST /users', target: 'table:users', type: 'writes' });
+  g.addEdge({ source: 'endpoint:GET /health', target: 'table:users', type: 'reads' });
+
+  g.frameworks = ['express'];
+  g.languages = ['typescript'];
+
+  return g;
+}
+
+describe('generateArchitectureDiagram', () => {
+  let graph: IntelGraph;
+  beforeEach(() => { graph = buildSampleGraph(); });
+
+  it('starts with graph TD', () => {
+    const result = generateArchitectureDiagram(graph);
+    expect(result).toMatch(/^graph TD/);
+  });
+
+  it('includes module subgraphs', () => {
+    const result = generateArchitectureDiagram(graph);
+    expect(result).toContain('subgraph');
+    // src module should appear
+    expect(result).toContain('src');
+  });
+
+  it('includes node names', () => {
+    const result = generateArchitectureDiagram(graph);
+    expect(result).toContain('src/index.ts');
+    expect(result).toContain('src/app.ts');
+  });
+
+  it('includes edge type labels', () => {
+    const result = generateArchitectureDiagram(graph);
+    expect(result).toContain('imports');
+  });
+});
+
+describe('generateDepsDiagram', () => {
+  let graph: IntelGraph;
+  beforeEach(() => { graph = buildSampleGraph(); });
+
+  it('starts with graph LR', () => {
+    const result = generateDepsDiagram(graph);
+    expect(result).toMatch(/^graph LR/);
+  });
+
+  it('contains node names', () => {
+    const result = generateDepsDiagram(graph);
+    expect(result).toContain('src/index.ts');
+  });
+
+  it('accepts a focus node', () => {
+    const result = generateDepsDiagram(graph, 'file:src/index.ts');
+    expect(result).toMatch(/^graph LR/);
+    // Should include the focal node
+    expect(result).toContain('src/index.ts');
+  });
+});
+
+describe('generateFlowDiagram', () => {
+  let graph: IntelGraph;
+  beforeEach(() => { graph = buildSampleGraph(); });
+
+  it('starts with graph LR', () => {
+    const result = generateFlowDiagram(graph);
+    expect(result).toMatch(/^graph LR/);
+  });
+
+  it('includes data flow edge labels', () => {
+    const result = generateFlowDiagram(graph);
+    // Should show reads and/or writes
+    const hasFlow = result.includes('reads') || result.includes('writes');
+    expect(hasFlow).toBe(true);
+  });
+
+  it('shows table nodes involved in flow', () => {
+    const result = generateFlowDiagram(graph);
+    expect(result).toContain('users');
+  });
+});
+
+describe('generateImpactDiagram', () => {
+  let graph: IntelGraph;
+  beforeEach(() => { graph = buildSampleGraph(); });
+
+  it('starts with graph TD', () => {
+    const result = generateImpactDiagram(graph, 'file:lib/utils.ts');
+    expect(result).toMatch(/^graph TD/);
+  });
+
+  it('includes style directives for target node', () => {
+    const result = generateImpactDiagram(graph, 'file:lib/utils.ts');
+    expect(result).toContain('style');
+    expect(result).toContain('fill:#f96');
+  });
+
+  it('handles non-existent node gracefully', () => {
+    const result = generateImpactDiagram(graph, 'nonexistent:node');
+    expect(result).toContain('not found');
+  });
+});
+
+describe('generateFrameworkDiagram', () => {
+  let graph: IntelGraph;
+  beforeEach(() => { graph = buildSampleGraph(); });
+
+  it('returns graph LR', () => {
+    const result = generateFrameworkDiagram(graph, 'express');
+    expect(result).toMatch(/^graph LR/);
+  });
+
+  it('only includes express framework nodes', () => {
+    const result = generateFrameworkDiagram(graph, 'express');
+    // Express endpoints should be present
+    expect(result).toContain('GET /health');
+  });
+});
+
+describe('Mermaid shapes', () => {
+  it('endpoints use hexagon shape {{}}', () => {
+    const g = new IntelGraph();
+    g.addNode({ id: 'endpoint:GET /test', type: 'endpoint', name: 'GET /test', metadata: {} });
+    const result = generateArchitectureDiagram(g);
+    expect(result).toContain('{{');
+    expect(result).toContain('}}');
+  });
+
+  it('tables use cylinder shape [()]', () => {
+    const g = new IntelGraph();
+    g.addNode({ id: 'table:orders', type: 'table', name: 'orders', metadata: {} });
+    const result = generateArchitectureDiagram(g);
+    expect(result).toContain('[(');
+    expect(result).toContain(')]');
+  });
+
+  it('services use rounded shape ([])', () => {
+    const g = new IntelGraph();
+    g.addNode({ id: 'service:api', type: 'service', name: 'api', metadata: {} });
+    const result = generateArchitectureDiagram(g);
+    expect(result).toContain('(["api"])');
+  });
+
+  it('external nodes use flag shape >]', () => {
+    const g = new IntelGraph();
+    g.addNode({ id: 'external:postgres', type: 'external', name: 'postgres', metadata: {} });
+    const result = generateArchitectureDiagram(g);
+    expect(result).toContain('>"postgres"]');
+  });
+});
+
+describe('formatQueryResultAsMermaid', () => {
+  it('produces valid Mermaid starting with graph LR', () => {
+    const nodes: IntelNode[] = [
+      { id: 'file:a.ts', type: 'file', name: 'a.ts', metadata: {} },
+      { id: 'file:b.ts', type: 'file', name: 'b.ts', metadata: {} },
+    ];
+    const edges: IntelEdge[] = [
+      { source: 'file:a.ts', target: 'file:b.ts', type: 'imports' },
+    ];
+    const result = formatQueryResultAsMermaid(nodes, edges);
+    expect(result).toMatch(/^graph LR/);
+    expect(result).toContain('subgraph');
+    expect(result).toContain('a.ts');
+    expect(result).toContain('b.ts');
+  });
+
+  it('highlights nodes with blue style', () => {
+    const nodes: IntelNode[] = [
+      { id: 'function:myFn', type: 'function', name: 'myFn', metadata: {} },
+    ];
+    const result = formatQueryResultAsMermaid(nodes, []);
+    expect(result).toContain('fill:#6af');
+  });
+});
diff --git a/src/intel/mermaid.ts b/src/intel/mermaid.ts
new file mode 100644
index 0000000..f6e26ff
--- /dev/null
+++ b/src/intel/mermaid.ts
@@ -0,0 +1,347 @@
+// src/intel/mermaid.ts
+
+import type { IntelGraph } from './graph.js';
+import type { IntelNode, IntelEdge, EdgeType } from './types.js';
+
+// ── Node ID sanitization ────────────────────────────────────────────────────
+
+/**
+ * Sanitize a string so it can be used as a Mermaid node identifier.
+ * Replaces spaces, colons, slashes, and other special chars with underscores.
+ */
+function sanitizeId(id: string): string {
+  return id.replace(/[^a-zA-Z0-9_]/g, '_');
+}
+
+/**
+ * Format a node as a Mermaid shape based on its type.
+ *
+ * Shape conventions:
+ *   modules  → [label]         (box/rectangle)
+ *   services → ([label])       (rounded rectangle)
+ *   endpoints→ {{label}}       (hexagon)
+ *   tables   → [(label)]       (cylinder)
+ *   external → >label]         (flag)
+ *   others   → [label]         (box, default)
+ */
+function nodeShape(node: IntelNode): string {
+  const safeId = sanitizeId(node.id);
+  const label = node.name.replace(/"/g, "'");
+  switch (node.type) {
+    case 'service':
+      return `${safeId}(["${label}"])`;
+    case 'endpoint':
+      return `${safeId}{{"${label}"}}`;
+    case 'table':
+      return `${safeId}[("${label}")]`;
+    case 'external':
+      return `${safeId}>"${label}"]`;
+    default:
+      return `${safeId}["${label}"]`;
+  }
+}
+
+/**
+ * Map an EdgeType to a Mermaid arrow style.
+ */
+function edgeArrow(type: EdgeType): string {
+  switch (type) {
+    case 'imports':
+    case 'calls':
+    case 'consumes':
+      return '-->';
+    case 'reads':
+      return '-..->';
+    case 'writes':
+      return '==>';
+    case 'publishes':
+    case 'subscribes':
+      return '-.->';
+    case 'exposes':
+    case 'contains':
+      return '-->';
+    case 'depends-on':
+    case 'deploys-with':
+    case 'configures':
+      return '--->';
+    default:
+      return '-->';
+  }
+}
+
+// ── Architecture Diagram (graph TD) ────────────────────────────────────────
+
+/**
+ * Generate an architecture overview diagram using Mermaid graph TD.
+ * Groups file/function/class nodes by module (top-level directory or file stem).
+ * Shows service, endpoint, table, external nodes at the top level.
+ */
+export function generateArchitectureDiagram(graph: IntelGraph): string {
+  const lines: string[] = ['graph TD'];
+
+  // Group file nodes by their top-level directory/module
+  const fileNodes = graph.filterByType('file');
+  const modules = new Map<string, IntelNode[]>();
+
+  for (const node of fileNodes) {
+    const fp = node.filePath ?? node.name;
+    const parts = fp.split('/');
+    const module = parts.length > 1 ? parts[0]! : 'root';
+    const list = modules.get(module) ?? [];
+    list.push(node);
+    modules.set(module, list);
+  }
+
+  // Emit subgraphs for each module
+  for (const [moduleName, nodes] of modules) {
+    const safeModule = sanitizeId(moduleName);
+    lines.push(`  subgraph ${safeModule}["${moduleName}"]`);
+    for (const n of nodes) {
+      lines.push(`    ${nodeShape(n)}`);
+    }
+    lines.push('  end');
+  }
+
+  // Emit non-file, non-function, non-class nodes at top level
+  const topLevelTypes = new Set(['service', 'endpoint', 'table', 'external', 'schema', 'queue', 'event', 'config']);
+  for (const node of graph.allNodes()) {
+    if (topLevelTypes.has(node.type)) {
+      lines.push(`  ${nodeShape(node)}`);
+    }
+  }
+
+  // Emit edges (deduplicated by source→target)
+  const seenEdges = new Set<string>();
+  for (const edge of graph.allEdges()) {
+    const key = `${edge.source}→${edge.target}→${edge.type}`;
+    if (seenEdges.has(key)) continue;
+    seenEdges.add(key);
+
+    const src = sanitizeId(edge.source);
+    const tgt = sanitizeId(edge.target);
+    const arrow = edgeArrow(edge.type);
+    lines.push(`  ${src} ${arrow}|"${edge.type}"| ${tgt}`);
+  }
+
+  return lines.join('\n');
+}
+
+// ── Deps Diagram (graph LR) ─────────────────────────────────────────────────
+
+/**
+ * Generate a dependency diagram (LR) focused on imports/calls between modules.
+ * If focus is provided, only show nodes reachable from the focused node.
+ */
+export function generateDepsDiagram(graph: IntelGraph, focus?: string): string {
+  const lines: string[] = ['graph LR'];
+
+  let nodesToShow: IntelNode[];
+  if (focus) {
+    const focal = graph.getNode(focus);
+    if (!focal) {
+      nodesToShow = graph.allNodes();
+    } else {
+      // Show focal node + its direct neighbors (outgoing)
+      const neighbors = graph.getNeighbors(focus, 'outgoing');
+      nodesToShow = [focal, ...neighbors];
+    }
+  } else {
+    nodesToShow = graph.allNodes();
+  }
+
+  const nodeIdSet = new Set(nodesToShow.map(n => n.id));
+
+  // Emit nodes
+  for (const node of nodesToShow) {
+    lines.push(`  ${nodeShape(node)}`);
+  }
+
+  // Emit import/call/depends-on edges
+  const depEdgeTypes: Set<EdgeType> = new Set(['imports', 'calls', 'depends-on', 'consumes']);
+  const seenEdges = new Set<string>();
+  for (const edge of graph.allEdges()) {
+    if (!depEdgeTypes.has(edge.type)) continue;
+    if (!nodeIdSet.has(edge.source) || !nodeIdSet.has(edge.target)) continue;
+
+    const key = `${edge.source}→${edge.target}`;
+    if (seenEdges.has(key)) continue;
+    seenEdges.add(key);
+
+    const src = sanitizeId(edge.source);
+    const tgt = sanitizeId(edge.target);
+    lines.push(`  ${src} --> ${tgt}`);
+  }
+
+  return lines.join('\n');
+}
+
+// ── Flow Diagram (graph LR, data flow) ──────────────────────────────────────
+
+/**
+ * Generate a data-flow diagram showing only reads/writes/publishes/subscribes edges.
+ */
+export function generateFlowDiagram(graph: IntelGraph): string {
+  const lines: string[] = ['graph LR'];
+
+  const flowEdgeTypes: Set<EdgeType> = new Set(['reads', 'writes', 'publishes', 'subscribes']);
+
+  // Collect only nodes that participate in flow edges
+  const participatingNodeIds = new Set<string>();
+  for (const edge of graph.allEdges()) {
+    if (flowEdgeTypes.has(edge.type)) {
+      participatingNodeIds.add(edge.source);
+      participatingNodeIds.add(edge.target);
+    }
+  }
+
+  // Emit participating nodes
+  for (const nodeId of participatingNodeIds) {
+    const node = graph.getNode(nodeId);
+    if (node) {
+      lines.push(`  ${nodeShape(node)}`);
+    }
+  }
+
+  // Emit flow edges
+  const seenEdges = new Set<string>();
+  for (const edge of graph.allEdges()) {
+    if (!flowEdgeTypes.has(edge.type)) continue;
+
+    const key = `${edge.source}→${edge.target}→${edge.type}`;
+    if (seenEdges.has(key)) continue;
+    seenEdges.add(key);
+
+    const src = sanitizeId(edge.source);
+    const tgt = sanitizeId(edge.target);
+    const arrow = edgeArrow(edge.type);
+    lines.push(`  ${src} ${arrow}|"${edge.type}"| ${tgt}`);
+  }
+
+  return lines.join('\n');
+}
+
+// ── Impact Diagram ──────────────────────────────────────────────────────────
+
+/**
+ * Generate an impact diagram showing which nodes are affected by a change to targetNodeId.
+ * Highlights the target node and its transitive dependents with red styling.
+ */
+export function generateImpactDiagram(graph: IntelGraph, targetNodeId: string): string {
+  const lines: string[] = ['graph TD'];
+
+  const target = graph.getNode(targetNodeId);
+  if (!target) {
+    lines.push(`  %% Node "${targetNodeId}" not found`);
+    return lines.join('\n');
+  }
+
+  // Get the impact subgraph (all nodes that depend on target)
+  const impacted = graph.getImpactSubgraph(targetNodeId);
+  const allRelevant = [target, ...impacted];
+  const relevantIds = new Set(allRelevant.map(n => n.id));
+
+  // Emit nodes
+  for (const node of allRelevant) {
+    lines.push(`  ${nodeShape(node)}`);
+  }
+
+  // Emit edges between relevant nodes
+  const seenEdges = new Set<string>();
+  for (const edge of graph.allEdges()) {
+    if (!relevantIds.has(edge.source) || !relevantIds.has(edge.target)) continue;
+
+    const key = `${edge.source}→${edge.target}`;
+    if (seenEdges.has(key)) continue;
+    seenEdges.add(key);
+
+    const src = sanitizeId(edge.source);
+    const tgt = sanitizeId(edge.target);
+    lines.push(`  ${src} --> ${tgt}`);
+  }
+
+  // Style: highlight target in red, impacted in orange
+  const targetSafeId = sanitizeId(targetNodeId);
+  lines.push(`  style ${targetSafeId} fill:#f96,stroke:#333,stroke-width:2px`);
+  for (const node of impacted) {
+    const safeId = sanitizeId(node.id);
+    lines.push(`  style ${safeId} fill:#ffa,stroke:#333`);
+  }
+
+  return lines.join('\n');
+}
+
+// ── Framework Diagram ───────────────────────────────────────────────────────
+
+/**
+ * Generate a diagram scoped to nodes that belong to a specific framework (or all frameworks).
+ */
+export function generateFrameworkDiagram(graph: IntelGraph, framework?: string): string {
+  const lines: string[] = ['graph LR'];
+
+  const nodes = framework
+    ? graph.allNodes().filter(n => n.framework === framework)
+    : graph.allNodes().filter(n => n.framework !== undefined);
+
+  const nodeIdSet = new Set(nodes.map(n => n.id));
+
+  for (const node of nodes) {
+    lines.push(`  ${nodeShape(node)}`);
+  }
+
+  // Emit edges between framework nodes
+  const seenEdges = new Set<string>();
+  for (const edge of graph.allEdges()) {
+    if (!nodeIdSet.has(edge.source) || !nodeIdSet.has(edge.target)) continue;
+
+    const key = `${edge.source}→${edge.target}`;
+    if (seenEdges.has(key)) continue;
+    seenEdges.add(key);
+
+    const src = sanitizeId(edge.source);
+    const tgt = sanitizeId(edge.target);
+    lines.push(`  ${src} --> ${tgt}`);
+  }
+
+  return lines.join('\n');
+}
+
+// ── Format Query Result ─────────────────────────────────────────────────────
+
+/**
+ * Format an ad-hoc set of nodes and edges as a Mermaid subgraph.
+ * Matching nodes are highlighted in blue.
+ */
+export function formatQueryResultAsMermaid(nodes: IntelNode[], edges: IntelEdge[]): string {
+  const lines: string[] = ['graph LR'];
+
+  const nodeIdSet = new Set(nodes.map(n => n.id));
+
+  // Emit all provided nodes inside a subgraph
+  lines.push('  subgraph results["Query Results"]');
+  for (const node of nodes) {
+    lines.push(`    ${nodeShape(node)}`);
+  }
+  lines.push('  end');
+
+  // Emit edges that connect provided nodes
+  const seenEdges = new Set<string>();
+  for (const edge of edges) {
+    if (!nodeIdSet.has(edge.source) || !nodeIdSet.has(edge.target)) continue;
+
+    const key = `${edge.source}→${edge.target}`;
+    if (seenEdges.has(key)) continue;
+    seenEdges.add(key);
+
+    const src = sanitizeId(edge.source);
+    const tgt = sanitizeId(edge.target);
+    lines.push(`  ${src} --> ${tgt}`);
+  }
+
+  // Highlight all matching nodes in blue
+  for (const node of nodes) {
+    const safeId = sanitizeId(node.id);
+    lines.push(`  style ${safeId} fill:#6af,stroke:#333`);
+  }
+
+  return lines.join('\n');
+}
diff --git a/src/intel/query.test.ts b/src/intel/query.test.ts
new file mode 100644
index 0000000..435a4c1
--- /dev/null
+++ b/src/intel/query.test.ts
@@ -0,0 +1,284 @@
+// src/intel/query.test.ts
+
+import { describe, it, expect } from 'vitest';
+import { query } from './query.js';
+import { IntelGraph } from './graph.js';
+import type { ProviderAdapter, ChatWithToolsResponse } from '../providers/base.js';
+import type { SemanticMetadata } from './types.js';
+
+// ── Test graph ────────────────────────────────────────────────────────────────
+
+function makeGraph(): IntelGraph {
+  const g = new IntelGraph();
+  g.addNode({ id: 'file:src/auth.ts', type: 'file', name: 'auth.ts', filePath: 'src/auth.ts', metadata: {} });
+  g.addNode({ id: 'file:src/user.ts', type: 'function', name: 'user.ts', filePath: 'src/user.ts', metadata: {} });
+  g.addNode({ id: 'file:src/index.ts', type: 'file', name: 'index.ts', filePath: 'src/index.ts', metadata: {} });
+  g.addNode({ id: 'table:users', type: 'table', name: 'users', metadata: {} });
+
+  g.addEdge({ source: 'file:src/auth.ts', target: 'file:src/user.ts', type: 'imports' });
+  g.addEdge({ source: 'file:src/index.ts', target: 'file:src/auth.ts', type: 'imports' });
+  g.addEdge({ source: 'file:src/user.ts', target: 'table:users', type: 'reads' });
+
+  return g;
+}
+
+const emptyEnrichment: SemanticMetadata[] = [];
+
+// ── Offline mode ──────────────────────────────────────────────────────────────
+
+describe('offline keyword search', () => {
+  it('matches node names', async () => {
+    const graph = makeGraph();
+    const result = await query('auth', graph, emptyEnrichment, null, {});
+
+    expect(result.nodes.map(n => n.id)).toContain('file:src/auth.ts');
+  });
+
+  it('returns empty for no matches', async () => {
+    const graph = makeGraph();
+    const result = await query('zzz_nonexistent_zzz', graph, emptyEnrichment, null, {});
+
+    expect(result.nodes).toHaveLength(0);
+    expect(result.edges).toHaveLength(0);
+  });
+
+  it('filters results by type when type option provided', async () => {
+    const graph = makeGraph();
+    // "ts" matches both file nodes and function node, but filter to 'table' should give 0
+    const result = await query('ts', graph, emptyEnrichment, null, { type: 'table' });
+
+    expect(result.nodes.every(n => n.type === 'table')).toBe(true);
+  });
+
+  it('type filter returns nodes of that type that also match keyword', async () => {
+    const graph = makeGraph();
+    // search for "auth" with file type
+    const result = await query('auth', graph, emptyEnrichment, null, { type: 'file' });
+
+    expect(result.nodes).toHaveLength(1);
+    expect(result.nodes[0]!.id).toBe('file:src/auth.ts');
+  });
+
+  it('includes mermaid output when mermaid option is set', async () => {
+    const graph = makeGraph();
+    const result = await query('auth', graph, emptyEnrichment, null, { mermaid: true });
+
+    expect(result.mermaid).toBeDefined();
+    expect(result.mermaid).toContain('graph LR');
+  });
+
+  it('does not include mermaid when option not set', async () => {
+    const graph = makeGraph();
+    const result = await query('auth', graph, emptyEnrichment, null, {});
+
+    expect(result.mermaid).toBeUndefined();
+  });
+});
+
+// ── Fallback behavior ─────────────────────────────────────────────────────────
+
+describe('falls back to offline mode', () => {
+  it('when provider is null', async () => {
+    const graph = makeGraph();
+    const result = await query('auth', graph, emptyEnrichment, null, {});
+
+    expect(result.nodes.map(n => n.id)).toContain('file:src/auth.ts');
+  });
+
+  it('when chatWithTools is unavailable on provider', async () => {
+    const providerWithoutTools: ProviderAdapter = {
+      info: { name: 'mock', supportsStreaming: true },
+      validateCredentials: async () => {},
+      listModels: async () => [],
+      streamCompletion: async function* () {
+        yield { delta: '', done: true };
+      },
+      // No chatWithTools
+    } as unknown as ProviderAdapter;
+
+    const graph = makeGraph();
+    const result = await query('auth', graph, emptyEnrichment, providerWithoutTools, {});
+
+    expect(result.nodes.map(n => n.id)).toContain('file:src/auth.ts');
+  });
+
+  it('when noAi option is true', async () => {
+    const providerWithTools: ProviderAdapter = {
+      info: { name: 'mock', supportsStreaming: true },
+      validateCredentials: async () => {},
+      listModels: async () => [],
+      streamCompletion: async function* () { yield { delta: '', done: true }; },
+      chatWithTools: async () => ({ content: 'AI response', toolCalls: [] }),
+    } as unknown as ProviderAdapter;
+
+    const graph = makeGraph();
+    const result = await query('auth', graph, emptyEnrichment, providerWithTools, { noAi: true });
+
+    // Should have used offline search — no explanation field
+    expect(result.explanation).toBeUndefined();
+    expect(result.nodes.map(n => n.id)).toContain('file:src/auth.ts');
+  });
+
+  it('falls back to offline when chatWithTools throws', async () => {
+    const failingProvider: ProviderAdapter = {
+      info: { name: 'mock', supportsStreaming: true },
+      validateCredentials: async () => {},
+      listModels: async () => [],
+      streamCompletion: async function* () { yield { delta: '', done: true }; },
+      chatWithTools: async () => { throw new Error('API error'); },
+    } as unknown as ProviderAdapter;
+
+    const graph = makeGraph();
+    const result = await query('auth', graph, emptyEnrichment, failingProvider, {});
+
+    // Should fall back to offline and still find auth
+    expect(result.nodes.map(n => n.id)).toContain('file:src/auth.ts');
+  });
+});
+
+// ── NL mode with tool calling ─────────────────────────────────────────────────
+
+describe('NL query with mocked chatWithTools', () => {
+  it('executes findNode tool call and returns matching nodes', async () => {
+    const graph = makeGraph();
+
+    const mockChatWithToolsResponse: ChatWithToolsResponse = {
+      content: 'Found the auth module.',
+      toolCalls: [
+        { id: '1', name: 'findNode', arguments: { keyword: 'auth' } },
+      ],
+    };
+
+    const aiProvider: ProviderAdapter = {
+      info: { name: 'mock', supportsStreaming: true },
+      validateCredentials: async () => {},
+      listModels: async () => [],
+      streamCompletion: async function* () { yield { delta: '', done: true }; },
+      chatWithTools: async () => mockChatWithToolsResponse,
+    } as unknown as ProviderAdapter;
+
+    const result = await query('find auth module', graph, emptyEnrichment, aiProvider, {});
+
+    expect(result.nodes.map(n => n.id)).toContain('file:src/auth.ts');
+    expect(result.explanation).toBe('Found the auth module.');
+  });
+
+  it('executes filterByType tool call', async () => {
+    const graph = makeGraph();
+
+    const mockResponse: ChatWithToolsResponse = {
+      content: 'All tables in the graph.',
+      toolCalls: [
+        { id: '2', name: 'filterByType', arguments: { type: 'table' } },
+      ],
+    };
+
+    const aiProvider: ProviderAdapter = {
+      info: { name: 'mock', supportsStreaming: true },
+      validateCredentials: async () => {},
+      listModels: async () => [],
+      streamCompletion: async function* () { yield { delta: '', done: true }; },
+      chatWithTools: async () => mockResponse,
+    } as unknown as ProviderAdapter;
+
+    const result = await query('list all tables', graph, emptyEnrichment, aiProvider, {});
+
+    expect(result.nodes.every(n => n.type === 'table')).toBe(true);
+    expect(result.nodes.map(n => n.id)).toContain('table:users');
+  });
+
+  it('executes getNeighbors tool call', async () => {
+    const graph = makeGraph();
+
+    const mockResponse: ChatWithToolsResponse = {
+      content: 'Neighbors of auth.',
+      toolCalls: [
+        { id: '3', name: 'getNeighbors', arguments: { nodeId: 'file:src/auth.ts', direction: 'outgoing' } },
+      ],
+    };
+
+    const aiProvider: ProviderAdapter = {
+      info: { name: 'mock', supportsStreaming: true },
+      validateCredentials: async () => {},
+      listModels: async () => [],
+      streamCompletion: async function* () { yield { delta: '', done: true }; },
+      chatWithTools: async () => mockResponse,
+    } as unknown as ProviderAdapter;
+
+    const result = await query('what does auth depend on', graph, emptyEnrichment, aiProvider, {});
+
+    // auth.ts → user.ts (outgoing)
+    expect(result.nodes.map(n => n.id)).toContain('file:src/user.ts');
+  });
+
+  it('executes getImpactSubgraph tool call', async () => {
+    const graph = makeGraph();
+
+    const mockResponse: ChatWithToolsResponse = {
+      content: 'Impact of changing auth.',
+      toolCalls: [
+        { id: '4', name: 'getImpactSubgraph', arguments: { nodeId: 'file:src/auth.ts' } },
+      ],
+    };
+
+    const aiProvider: ProviderAdapter = {
+      info: { name: 'mock', supportsStreaming: true },
+      validateCredentials: async () => {},
+      listModels: async () => [],
+      streamCompletion: async function* () { yield { delta: '', done: true }; },
+      chatWithTools: async () => mockResponse,
+    } as unknown as ProviderAdapter;
+
+    const result = await query('impact of changing auth', graph, emptyEnrichment, aiProvider, {});
+
+    // index.ts imports auth.ts, so it should be in the impact subgraph
+    expect(result.nodes.map(n => n.id)).toContain('file:src/index.ts');
+  });
+
+  it('includes mermaid when option set in NL mode', async () => {
+    const graph = makeGraph();
+
+    const mockResponse: ChatWithToolsResponse = {
+      content: 'Found nodes.',
+      toolCalls: [
+        { id: '5', name: 'findNode', arguments: { keyword: 'auth' } },
+      ],
+    };
+
+    const aiProvider: ProviderAdapter = {
+      info: { name: 'mock', supportsStreaming: true },
+      validateCredentials: async () => {},
+      listModels: async () => [],
+      streamCompletion: async function* () { yield { delta: '', done: true }; },
+      chatWithTools: async () => mockResponse,
+    } as unknown as ProviderAdapter;
+
+    const result = await query('auth', graph, emptyEnrichment, aiProvider, { mermaid: true });
+
+    expect(result.mermaid).toBeDefined();
+    expect(result.mermaid).toContain('graph LR');
+  });
+
+  it('falls back to offline when no tool calls returned', async () => {
+    const graph = makeGraph();
+
+    // Provider returns no tool calls
+    const mockResponse: ChatWithToolsResponse = {
+      content: 'I cannot help with that.',
+      toolCalls: [],
+    };
+
+    const aiProvider: ProviderAdapter = {
+      info: { name: 'mock', supportsStreaming: true },
+      validateCredentials: async () => {},
+      listModels: async () => [],
+      streamCompletion: async function* () { yield { delta: '', done: true }; },
+      chatWithTools: async () => mockResponse,
+    } as unknown as ProviderAdapter;
+
+    const result = await query('auth', graph, emptyEnrichment, aiProvider, {});
+
+    // Should fall back to offline keyword search
+    expect(result.nodes.map(n => n.id)).toContain('file:src/auth.ts');
+  });
+});
diff --git a/src/intel/query.ts b/src/intel/query.ts
new file mode 100644
index 0000000..d63fb83
--- /dev/null
+++ b/src/intel/query.ts
@@ -0,0 +1,226 @@
+// src/intel/query.ts
+
+import type { ProviderAdapter, ToolDefinition, ToolCall } from '../providers/base.js';
+import type { IntelNode, IntelEdge, SemanticMetadata, NodeType } from './types.js';
+import type { IntelGraph } from './graph.js';
+import { formatQueryResultAsMermaid } from './mermaid.js';
+import { logger } from '../utils/logger.js';
+
+export interface QueryResult {
+  nodes: IntelNode[];
+  edges: IntelEdge[];
+  explanation?: string;
+  mermaid?: string;
+}
+
+export interface QueryOptions {
+  noAi?: boolean;
+  mermaid?: boolean;
+  type?: NodeType;
+}
+
+// ── Graph operation tools ─────────────────────────────────────────────────────
+
+const GRAPH_TOOLS: ToolDefinition[] = [
+  {
+    name: 'findNode',
+    description: 'Search for nodes by keyword in name or file path.',
+    parameters: {
+      type: 'object',
+      properties: {
+        keyword: { type: 'string', description: 'Keyword to search for' },
+      },
+      required: ['keyword'],
+    },
+  },
+  {
+    name: 'getNeighbors',
+    description: 'Get neighboring nodes of a given node.',
+    parameters: {
+      type: 'object',
+      properties: {
+        nodeId: { type: 'string', description: 'The node ID to find neighbors for' },
+        direction: {
+          type: 'string',
+          enum: ['outgoing', 'incoming', 'both'],
+          description: 'Direction of edges to follow',
+        },
+      },
+      required: ['nodeId', 'direction'],
+    },
+  },
+  {
+    name: 'filterByType',
+    description: 'Get all nodes of a specific type.',
+    parameters: {
+      type: 'object',
+      properties: {
+        type: {
+          type: 'string',
+          enum: [
+            'repo', 'service', 'module', 'file',
+            'class', 'function', 'endpoint',
+            'table', 'schema', 'queue', 'event',
+            'config', 'external',
+          ],
+          description: 'The node type to filter by',
+        },
+      },
+      required: ['type'],
+    },
+  },
+  {
+    name: 'getImpactSubgraph',
+    description: 'Get all nodes that depend on (are impacted by changes to) a given node.',
+    parameters: {
+      type: 'object',
+      properties: {
+        nodeId: { type: 'string', description: 'The node ID to find dependents for' },
+      },
+      required: ['nodeId'],
+    },
+  },
+];
+
+// ── Tool execution ────────────────────────────────────────────────────────────
+
+function executeToolCall(toolCall: ToolCall, graph: IntelGraph): IntelNode[] {
+  const args = toolCall.arguments;
+
+  switch (toolCall.name) {
+    case 'findNode': {
+      const keyword = typeof args['keyword'] === 'string' ? args['keyword'] : '';
+      return graph.search(keyword);
+    }
+    case 'getNeighbors': {
+      const nodeId = typeof args['nodeId'] === 'string' ? args['nodeId'] : '';
+      const direction = args['direction'];
+      const dir =
+        direction === 'outgoing' || direction === 'incoming' || direction === 'both'
+          ? direction
+          : 'both';
+      return graph.getNeighbors(nodeId, dir);
+    }
+    case 'filterByType': {
+      const type = typeof args['type'] === 'string' ? (args['type'] as NodeType) : 'file';
+      return graph.filterByType(type);
+    }
+    case 'getImpactSubgraph': {
+      const nodeId = typeof args['nodeId'] === 'string' ? args['nodeId'] : '';
+      return graph.getImpactSubgraph(nodeId);
+    }
+    default:
+      logger.warn(`[query] Unknown tool call: ${toolCall.name}`);
+      return [];
+  }
+}
+
+// ── Offline (keyword) query ───────────────────────────────────────────────────
+
+function offlineQuery(
+  queryText: string,
+  graph: IntelGraph,
+  options: QueryOptions,
+): QueryResult {
+  let nodes = graph.search(queryText);
+
+  if (options.type != null) {
+    nodes = nodes.filter(n => n.type === options.type);
+  }
+
+  // Collect edges between the matched nodes
+  const nodeIdSet = new Set(nodes.map(n => n.id));
+  const edges = graph
+    .allEdges()
+    .filter(e => nodeIdSet.has(e.source) && nodeIdSet.has(e.target));
+
+  const result: QueryResult = { nodes, edges };
+
+  if (options.mermaid) {
+    result.mermaid = formatQueryResultAsMermaid(nodes, edges);
+  }
+
+  return result;
+}
+
+// ── Main query function ───────────────────────────────────────────────────────
+
+export async function query(
+  queryText: string,
+  graph: IntelGraph,
+  enrichment: SemanticMetadata[],
+  provider: ProviderAdapter | null,
+  options: QueryOptions,
+): Promise<QueryResult> {
+  // Determine if NL/AI mode is available
+  const canUseAi =
+    !options.noAi &&
+    provider != null &&
+    provider.chatWithTools != null;
+
+  if (!canUseAi) {
+    return offlineQuery(queryText, graph, options);
+  }
+
+  // NL mode: use tool calling
+  try {
+    const systemPrompt = [
+      'You are a codebase architecture assistant.',
+      'Use the provided tools to answer the user\'s query about the codebase graph.',
+      'Call one or more tools as needed, then summarize the results.',
+      enrichment.length > 0
+        ? `There are ${enrichment.length} enriched nodes with semantic metadata available.`
+        : null,
+    ]
+      .filter(Boolean)
+      .join('\n');
+
+    const response = await provider.chatWithTools!(
+      [{ role: 'user', content: queryText }],
+      GRAPH_TOOLS,
+      { systemPrompt },
+    );
+
+    const collectedNodes: IntelNode[] = [];
+    const seenNodeIds = new Set<string>();
+
+    if (response.toolCalls && response.toolCalls.length > 0) {
+      for (const toolCall of response.toolCalls) {
+        const toolNodes = executeToolCall(toolCall, graph);
+        for (const node of toolNodes) {
+          if (!seenNodeIds.has(node.id)) {
+            seenNodeIds.add(node.id);
+            collectedNodes.push(node);
+          }
+        }
+      }
+    }
+
+    // If no tool calls were made, fall back to offline keyword search
+    if (collectedNodes.length === 0 && (!response.toolCalls || response.toolCalls.length === 0)) {
+      logger.info('[query] No tool calls returned by provider, falling back to offline search');
+      return offlineQuery(queryText, graph, options);
+    }
+
+    // Collect edges between matched nodes
+    const nodeIdSet = new Set(collectedNodes.map(n => n.id));
+    const edges = graph
+      .allEdges()
+      .filter(e => nodeIdSet.has(e.source) && nodeIdSet.has(e.target));
+
+    const result: QueryResult = {
+      nodes: collectedNodes,
+      edges,
+      explanation: response.content ?? undefined,
+    };
+
+    if (options.mermaid) {
+      result.mermaid = formatQueryResultAsMermaid(collectedNodes, edges);
+    }
+
+    return result;
+  } catch (err) {
+    logger.warn(`[query] Tool-calling query failed, falling back to offline: ${String(err)}`);
+    return offlineQuery(queryText, graph, options);
+  }
+}
diff --git a/src/intel/scanner.test.ts b/src/intel/scanner.test.ts
new file mode 100644
index 0000000..6820710
--- /dev/null
+++ b/src/intel/scanner.test.ts
@@ -0,0 +1,162 @@
+// src/intel/scanner.test.ts
+
+import { describe, it, expect, beforeAll, afterAll } from 'vitest';
+import { mkdtemp, writeFile, mkdir, rm } from 'node:fs/promises';
+import { join } from 'node:path';
+import { tmpdir } from 'node:os';
+import { exec } from 'node:child_process';
+import { promisify } from 'node:util';
+import { Scanner } from './scanner.js';
+
+const execAsync = promisify(exec);
+
+let rootDir: string;
+
+async function setupExpressFixture(dir: string): Promise<void> {
+  // Git init
+  await execAsync('git init', { cwd: dir });
+  await execAsync('git config user.email "test@test.com"', { cwd: dir });
+  await execAsync('git config user.name "Test"', { cwd: dir });
+
+  // package.json with express
+  await writeFile(
+    join(dir, 'package.json'),
+    JSON.stringify({
+      name: 'express-fixture',
+      dependencies: { express: '^4.18.0' },
+    }),
+  );
+
+  // src/index.ts
+  await mkdir(join(dir, 'src'));
+  await writeFile(
+    join(dir, 'src', 'index.ts'),
+    `import express from 'express';
+import { app } from './app.js';
+
+const PORT = process.env.PORT ?? 3000;
+app.listen(PORT, () => {
+  console.log('Server running on port ' + PORT);
+});
+`,
+  );
+
+  // src/app.ts
+  await writeFile(
+    join(dir, 'src', 'app.ts'),
+    `import express from 'express';
+import { usersRouter } from './routes/users.js';
+
+export const app = express();
+app.use('/users', usersRouter);
+app.get('/health', (_req, res) => res.json({ ok: true }));
+`,
+  );
+
+  // src/routes/users.ts
+  await mkdir(join(dir, 'src', 'routes'));
+  await writeFile(
+    join(dir, 'src', 'routes', 'users.ts'),
+    `import { Router } from 'express';
+
+export const router = Router();
+router.get('/users', (_req, res) => res.json([]));
+router.post('/users', (_req, res) => res.status(201).json({}));
+router.get('/users/:id', (_req, res) => res.json({}));
+`,
+  );
+
+  // Stage and commit all files so git ls-files picks them up
+  await execAsync('git add .', { cwd: dir });
+  await execAsync('git commit -m "initial"', { cwd: dir });
+}
+
+beforeAll(async () => {
+  rootDir = await mkdtemp(join(tmpdir(), 'jam-scanner-test-'));
+  await setupExpressFixture(rootDir);
+});
+
+afterAll(async () => {
+  await rm(rootDir, { recursive: true, force: true });
+});
+
+describe('Scanner', () => {
+  it('scans a workspace and returns a graph with nodes', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+    expect(graph.nodeCount).toBeGreaterThan(0);
+  });
+
+  it('detects express framework', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+    expect(graph.frameworks).toContain('express');
+  });
+
+  it('creates file nodes for source files', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+    const fileNodes = graph.filterByType('file');
+    expect(fileNodes.length).toBeGreaterThanOrEqual(3);
+    const filePaths = fileNodes.map(n => n.filePath ?? '');
+    expect(filePaths.some(p => p.includes('index.ts'))).toBe(true);
+    expect(filePaths.some(p => p.includes('app.ts'))).toBe(true);
+    expect(filePaths.some(p => p.includes('users.ts'))).toBe(true);
+  });
+
+  it('creates endpoint nodes for Express routes', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+    const endpointNodes = graph.filterByType('endpoint');
+    expect(endpointNodes.length).toBeGreaterThan(0);
+    // Should detect at least the /health route and users routes
+    const names = endpointNodes.map(n => n.name);
+    expect(names.some(n => n.includes('GET'))).toBe(true);
+    expect(names.some(n => n.includes('POST'))).toBe(true);
+  });
+
+  it('records mtimes for scanned files', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir);
+    const mtimeEntries = Object.keys(graph.mtimes);
+    expect(mtimeEntries.length).toBeGreaterThan(0);
+    // All mtime values should be positive numbers
+    for (const key of mtimeEntries) {
+      expect(graph.mtimes[key]).toBeGreaterThan(0);
+    }
+  });
+
+  it('incremental scan produces same result as full scan', async () => {
+    const scanner = new Scanner();
+    const graph1 = await scanner.scan(rootDir);
+
+    // Second scan with previousGraph
+    const graph2 = await scanner.scan(rootDir, { previousGraph: graph1 });
+
+    // Node counts should be similar (incremental may be equal or very close)
+    const nodeCount1 = graph1.nodeCount;
+    const nodeCount2 = graph2.nodeCount;
+    // Allow small difference due to incremental edge copying logic
+    expect(nodeCount2).toBeGreaterThan(0);
+    // Frameworks should still be detected
+    expect(graph2.frameworks).toContain('express');
+  });
+
+  it('excludes files matching exclude patterns', async () => {
+    const scanner = new Scanner();
+    const graph = await scanner.scan(rootDir, { excludePatterns: ['src/routes'] });
+    const fileNodes = graph.filterByType('file');
+    const filePaths = fileNodes.map(n => n.filePath ?? '');
+    // routes/users.ts should be excluded
+    expect(filePaths.some(p => p.includes('routes'))).toBe(false);
+  });
+
+  it('collectFiles returns only files with registered analyzers', async () => {
+    const scanner = new Scanner();
+    const files = await scanner.collectFiles(rootDir, []);
+    // Should include .ts files
+    expect(files.some(f => f.endsWith('.ts'))).toBe(true);
+    // Should not include non-source files
+    expect(files.every(f => !f.endsWith('.gitignore') || f.endsWith('.ts'))).toBe(true);
+  });
+});
diff --git a/src/intel/scanner.ts b/src/intel/scanner.ts
new file mode 100644
index 0000000..edc3850
--- /dev/null
+++ b/src/intel/scanner.ts
@@ -0,0 +1,243 @@
+// src/intel/scanner.ts
+
+import { readFile, stat, readdir } from 'node:fs/promises';
+import { join, relative, extname, basename } from 'node:path';
+import { exec } from 'node:child_process';
+import { promisify } from 'node:util';
+import { IntelGraph } from './graph.js';
+import { AnalyzerRegistry, createDefaultRegistry } from './analyzers/registry.js';
+import { detectFrameworks } from './frameworks/detector.js';
+
+const execAsync = promisify(exec);
+
+/**
+ * Check if a directory is a git repository.
+ */
+async function isGitRepo(rootDir: string): Promise<boolean> {
+  try {
+    await execAsync('git rev-parse --is-inside-work-tree', { cwd: rootDir });
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+/**
+ * Collect files via git ls-files (respects .gitignore, includes tracked + untracked non-ignored).
+ */
+async function collectViaGit(rootDir: string): Promise<string[]> {
+  const { stdout } = await execAsync(
+    'git ls-files --cached --others --exclude-standard',
+    { cwd: rootDir },
+  );
+  return stdout
+    .split('\n')
+    .map(l => l.trim())
+    .filter(Boolean);
+}
+
+/**
+ * Recursively walk a directory and return relative file paths.
+ */
+async function walkDir(dir: string, rootDir: string): Promise<string[]> {
+  const results: string[] = [];
+  let entries: string[];
+  try {
+    entries = await readdir(dir);
+  } catch {
+    return results;
+  }
+  for (const name of entries) {
+    const fullPath = join(dir, name);
+    let s: Awaited<ReturnType<typeof stat>>;
+    try {
+      s = await stat(fullPath);
+    } catch {
+      continue;
+    }
+    if (s.isDirectory()) {
+      // Skip common non-source dirs
+      if (['.git', 'node_modules', '.jam', 'dist', 'build', '.next', '.cache'].includes(name)) continue;
+      const subResults = await walkDir(fullPath, rootDir);
+      results.push(...subResults);
+    } else if (s.isFile()) {
+      results.push(relative(rootDir, fullPath));
+    }
+  }
+  return results;
+}
+
+/**
+ * Match a relative path against a list of glob-like exclude patterns.
+ * Supports simple wildcards: * (no path separator) and ** (any path).
+ */
+function matchesExcludePattern(relPath: string, pattern: string): boolean {
+  // Simple approach: convert pattern to regex
+  const escaped = pattern
+    .replace(/[.+^${}()|[\]\\]/g, '\\$&')
+    .replace(/\*\*/g, '@@DOUBLESTAR@@')
+    .replace(/\*/g, '[^/]*')
+    .replace(/@@DOUBLESTAR@@/g, '.*');
+  const re = new RegExp(`^${escaped}$`);
+  return re.test(relPath) || re.test(relPath + '/') || relPath.startsWith(pattern.replace(/\*$/, ''));
+}
+
+function shouldExclude(relPath: string, patterns: string[]): boolean {
+  for (const p of patterns) {
+    if (matchesExcludePattern(relPath, p)) return true;
+    // Also check if any path segment matches
+    if (relPath.includes(p)) return true;
+  }
+  return false;
+}
+
+export interface ScanOptions {
+  previousGraph?: IntelGraph;
+  excludePatterns?: string[];
+}
+
+export class Scanner {
+  private registry: AnalyzerRegistry;
+
+  constructor(registry?: AnalyzerRegistry) {
+    this.registry = registry ?? createDefaultRegistry();
+  }
+
+  /**
+   * Collect source files from rootDir that have a registered analyzer.
+   */
+  async collectFiles(rootDir: string, excludePatterns: string[]): Promise<string[]> {
+    let relPaths: string[];
+
+    const inGit = await isGitRepo(rootDir);
+    if (inGit) {
+      relPaths = await collectViaGit(rootDir);
+    } else {
+      relPaths = await walkDir(rootDir, rootDir);
+    }
+
+    // Get the set of extensions and filenames covered by the registry
+    const analyzers = this.registry.getAll();
+    const knownExts = new Set<string>();
+    const knownFilenames = new Set<string>();
+    for (const a of analyzers) {
+      for (const ext of a.extensions) knownExts.add(ext);
+      for (const fn of a.filenames ?? []) knownFilenames.add(fn);
+    }
+
+    return relPaths.filter(relPath => {
+      if (shouldExclude(relPath, excludePatterns)) return false;
+
+      const fname = basename(relPath);
+      if (knownFilenames.has(fname)) return true;
+
+      const ext = extname(fname);
+      return ext !== '' && knownExts.has(ext);
+    });
+  }
+
+  /**
+   * Scan the workspace and return an IntelGraph.
+   */
+  async scan(rootDir: string, options: ScanOptions = {}): Promise<IntelGraph> {
+    const { previousGraph, excludePatterns = [] } = options;
+    const graph = new IntelGraph();
+
+    // Detect frameworks
+    const frameworks = await detectFrameworks(rootDir);
+    graph.frameworks = frameworks;
+
+    // Collect files
+    const relPaths = await this.collectFiles(rootDir, excludePatterns);
+
+    // Determine the set of languages from all analyzers (for the graph)
+    const languageSet = new Set<string>();
+
+    // For incremental scan: build a map of what nodes/edges the previous graph had per file
+    const prevMtimes = previousGraph?.mtimes ?? {};
+
+    // (placeholder for analyzeProject accumulation)
+
+    for (const relPath of relPaths) {
+      const fullPath = join(rootDir, relPath);
+
+      // Get mtime
+      let mtime = 0;
+      try {
+        const s = await stat(fullPath);
+        mtime = s.mtimeMs;
+      } catch {
+        // file may have been deleted, skip
+        continue;
+      }
+      graph.mtimes[relPath] = mtime;
+
+      // Incremental: if mtime unchanged and previousGraph has this file, copy nodes/edges
+      if (previousGraph && prevMtimes[relPath] === mtime) {
+        // Copy nodes for this file path
+        for (const node of previousGraph.allNodes()) {
+          if (node.filePath === relPath) {
+            graph.addNode(node);
+          }
+        }
+        // Copy edges that involve nodes from this file
+        // We handle this via a post-copy step below
+        continue;
+      }
+
+      // Fresh analysis
+      const analyzer = this.registry.getForFile(relPath);
+      if (!analyzer) continue;
+
+      // Track languages
+      for (const lang of analyzer.languages) languageSet.add(lang);
+
+      let content: string;
+      try {
+        content = await readFile(fullPath, 'utf-8');
+      } catch {
+        continue;
+      }
+
+      const { nodes, edges } = analyzer.analyzeFile(content, relPath, rootDir);
+      for (const node of nodes) graph.addNode(node);
+      for (const edge of edges) graph.addEdge(edge);
+    }
+
+    // For incremental: copy edges from previousGraph where both endpoints are in new graph
+    if (previousGraph) {
+      const newNodeIds = new Set(graph.allNodes().map(n => n.id));
+      for (const edge of previousGraph.allEdges()) {
+        // Only copy if not already present (simple check: try to avoid dups)
+        if (newNodeIds.has(edge.source) && newNodeIds.has(edge.target)) {
+          // Check if edge already exists
+          const existing = graph.getEdgesFrom(edge.source).find(
+            e => e.target === edge.target && e.type === edge.type,
+          );
+          if (!existing) {
+            graph.addEdge(edge);
+          }
+        }
+      }
+    }
+
+    // Cross-file analyzeProject passes
+    const currentNodes = graph.allNodes();
+    const currentEdges = graph.allEdges();
+
+    for (const analyzer of this.registry.getAll()) {
+      if (typeof analyzer.analyzeProject === 'function') {
+        const result = analyzer.analyzeProject(currentNodes, currentEdges, rootDir);
+        for (const node of result.nodes) graph.addNode(node);
+        for (const edge of result.edges) graph.addEdge(edge);
+        for (const fw of result.frameworks) {
+          if (!graph.frameworks.includes(fw)) graph.frameworks.push(fw);
+        }
+      }
+    }
+
+    graph.languages = [...languageSet].sort();
+
+    return graph;
+  }
+}
diff --git a/src/intel/storage.test.ts b/src/intel/storage.test.ts
new file mode 100644
index 0000000..4559ebd
--- /dev/null
+++ b/src/intel/storage.test.ts
@@ -0,0 +1,176 @@
+// src/intel/storage.test.ts
+
+import { describe, it, expect, beforeAll, afterAll } from 'vitest';
+import { mkdtemp, writeFile, rm, readFile } from 'node:fs/promises';
+import { join } from 'node:path';
+import { tmpdir } from 'node:os';
+import { IntelGraph } from './graph.js';
+import {
+  saveGraph,
+  loadGraph,
+  saveEnrichment,
+  loadEnrichment,
+  saveMermaid,
+  checkGitignore,
+} from './storage.js';
+
+let tmpDir: string;
+
+beforeAll(async () => {
+  tmpDir = await mkdtemp(join(tmpdir(), 'jam-storage-test-'));
+});
+
+afterAll(async () => {
+  await rm(tmpDir, { recursive: true, force: true });
+});
+
+function makeGraph(): IntelGraph {
+  const g = new IntelGraph();
+  g.addNode({ id: 'file:src/index.ts', type: 'file', name: 'src/index.ts', filePath: 'src/index.ts', metadata: {} });
+  g.addNode({ id: 'function:main', type: 'function', name: 'main', metadata: {} });
+  g.addEdge({ source: 'file:src/index.ts', target: 'function:main', type: 'contains' });
+  g.frameworks = ['express'];
+  g.languages = ['typescript'];
+  g.mtimes = { 'src/index.ts': 1234567890 };
+  return g;
+}
+
+describe('saveGraph / loadGraph', () => {
+  it('saves graph and file exists', async () => {
+    const dir = join(tmpDir, 'save-test');
+    const g = makeGraph();
+    await saveGraph(g, dir);
+
+    const content = await readFile(join(dir, '.jam', 'intel', 'graph.json'), 'utf-8');
+    expect(content).toBeTruthy();
+    const parsed = JSON.parse(content);
+    expect(parsed.version).toBe(1);
+    expect(parsed.nodes.length).toBe(2);
+  });
+
+  it('loads graph roundtrip', async () => {
+    const dir = join(tmpDir, 'roundtrip-test');
+    const g = makeGraph();
+    await saveGraph(g, dir);
+
+    const loaded = await loadGraph(dir);
+    expect(loaded).not.toBeNull();
+    expect(loaded!.nodeCount).toBe(2);
+    expect(loaded!.edgeCount).toBe(1);
+    expect(loaded!.frameworks).toContain('express');
+    expect(loaded!.languages).toContain('typescript');
+    expect(loaded!.mtimes['src/index.ts']).toBe(1234567890);
+  });
+
+  it('returns null when no graph file exists', async () => {
+    const dir = join(tmpDir, 'no-graph');
+    const result = await loadGraph(dir);
+    expect(result).toBeNull();
+  });
+});
+
+describe('saveEnrichment / loadEnrichment', () => {
+  it('saves and loads enrichment', async () => {
+    const dir = join(tmpDir, 'enrichment-test');
+    const entries = [
+      {
+        nodeId: 'file:src/index.ts',
+        purpose: 'Entry point',
+        domain: 'server',
+        depth: 'shallow' as const,
+      },
+    ];
+    await saveEnrichment(entries, { depth: 'shallow', tokensUsed: 150 }, dir);
+
+    const loaded = await loadEnrichment(dir);
+    expect(loaded).not.toBeNull();
+    expect(loaded!.version).toBe(1);
+    expect(loaded!.depth).toBe('shallow');
+    expect(loaded!.tokensUsed).toBe(150);
+    expect(loaded!.entries.length).toBe(1);
+    expect(loaded!.entries[0]!.nodeId).toBe('file:src/index.ts');
+    expect(loaded!.entries[0]!.purpose).toBe('Entry point');
+  });
+
+  it('returns null when no enrichment file exists', async () => {
+    const dir = join(tmpDir, 'no-enrichment');
+    const result = await loadEnrichment(dir);
+    expect(result).toBeNull();
+  });
+});
+
+describe('saveMermaid', () => {
+  it('saves mermaid to default filename and returns path', async () => {
+    const dir = join(tmpDir, 'mermaid-test');
+    const mmd = 'graph TD\n  A --> B';
+    const resultPath = await saveMermaid(mmd, dir);
+
+    expect(resultPath).toBe(join(dir, '.jam', 'intel', 'architecture.mmd'));
+    const content = await readFile(resultPath, 'utf-8');
+    expect(content).toBe(mmd);
+  });
+
+  it('saves mermaid with custom filename', async () => {
+    const dir = join(tmpDir, 'mermaid-custom-test');
+    const mmd = 'graph LR\n  X --> Y';
+    const resultPath = await saveMermaid(mmd, dir, 'custom.mmd');
+
+    expect(resultPath).toBe(join(dir, '.jam', 'intel', 'custom.mmd'));
+    const content = await readFile(resultPath, 'utf-8');
+    expect(content).toBe(mmd);
+  });
+});
+
+describe('checkGitignore', () => {
+  it('returns false when .gitignore does not exist', async () => {
+    const dir = join(tmpDir, 'no-gitignore');
+    expect(checkGitignore(dir)).toBe(false);
+  });
+
+  it('returns false when .jam is not in .gitignore', async () => {
+    const dir = join(tmpDir, 'gitignore-no-jam');
+    await writeFile(join(dir + '-dummy-hack', '.gitignore').replace('-dummy-hack', ''), 'node_modules\ndist\n').catch(async () => {
+      // dir may not exist yet, create it
+      const { mkdir: mkdirFs } = await import('node:fs/promises');
+      await mkdirFs(dir, { recursive: true });
+      await writeFile(join(dir, '.gitignore'), 'node_modules\ndist\n');
+    });
+    try {
+      await writeFile(join(dir, '.gitignore'), 'node_modules\ndist\n');
+    } catch {
+      // already exists from above
+    }
+    expect(checkGitignore(dir)).toBe(false);
+  });
+
+  it('returns true when .jam is in .gitignore', async () => {
+    const dir = join(tmpDir, 'gitignore-has-jam');
+    const { mkdir: mkdirFs } = await import('node:fs/promises');
+    await mkdirFs(dir, { recursive: true });
+    await writeFile(join(dir, '.gitignore'), 'node_modules\n.jam\ndist\n');
+    expect(checkGitignore(dir)).toBe(true);
+  });
+
+  it('returns true when .jam/intel is in .gitignore', async () => {
+    const dir = join(tmpDir, 'gitignore-has-jam-intel');
+    const { mkdir: mkdirFs } = await import('node:fs/promises');
+    await mkdirFs(dir, { recursive: true });
+    await writeFile(join(dir, '.gitignore'), 'node_modules\n.jam/intel\n');
+    expect(checkGitignore(dir)).toBe(true);
+  });
+});
+
+describe('lock prevents concurrent writes', () => {
+  it('raises an error on concurrent writes (second write finds lock)', async () => {
+    const dir = join(tmpDir, 'lock-test');
+    const g = makeGraph();
+
+    // Manually create the lock first
+    const { mkdir: mkdirFs, writeFile: wf } = await import('node:fs/promises');
+    await mkdirFs(join(dir, '.jam', 'intel'), { recursive: true });
+    await wf(join(dir, '.jam', 'intel', '.lock'), 'fake-lock', { flag: 'wx' });
+
+    // Now try to save — should fail because lock exists
+    await expect(saveGraph(g, dir)).rejects.toThrow();
+  });
+});
diff --git a/src/intel/storage.ts b/src/intel/storage.ts
new file mode 100644
index 0000000..c50f97c
--- /dev/null
+++ b/src/intel/storage.ts
@@ -0,0 +1,132 @@
+// src/intel/storage.ts
+
+import { readFile, writeFile, mkdir, unlink, readdir } from 'node:fs/promises';
+import { join } from 'node:path';
+import { IntelGraph } from './graph.js';
+import type { SerializedGraph, SerializedEnrichment, SemanticMetadata, EnrichDepth } from './types.js';
+
+function storageDir(rootDir: string): string {
+  return join(rootDir, '.jam', 'intel');
+}
+
+async function ensureStorageDir(rootDir: string): Promise<string> {
+  const dir = storageDir(rootDir);
+  await mkdir(dir, { recursive: true });
+  return dir;
+}
+
+/**
+ * Save an IntelGraph to disk as graph.json.
+ * Uses a lock file to prevent concurrent writes.
+ */
+export async function saveGraph(graph: IntelGraph, rootDir: string): Promise<void> {
+  const dir = await ensureStorageDir(rootDir);
+  const lockPath = join(dir, '.lock');
+
+  // Acquire lock
+  let lockAcquired = false;
+  try {
+    await writeFile(lockPath, process.pid.toString(), { flag: 'wx' });
+    lockAcquired = true;
+
+    const serialized = graph.serialize(rootDir);
+    await writeFile(join(dir, 'graph.json'), JSON.stringify(serialized, null, 2), 'utf-8');
+  } finally {
+    if (lockAcquired) {
+      await unlink(lockPath).catch(() => undefined);
+    }
+  }
+}
+
+/**
+ * Load an IntelGraph from disk. Returns null if no graph file exists.
+ */
+export async function loadGraph(rootDir: string): Promise<IntelGraph | null> {
+  const graphPath = join(storageDir(rootDir), 'graph.json');
+  let content: string;
+  try {
+    content = await readFile(graphPath, 'utf-8');
+  } catch {
+    return null;
+  }
+
+  try {
+    const data = JSON.parse(content) as SerializedGraph;
+    return IntelGraph.deserialize(data);
+  } catch {
+    return null;
+  }
+}
+
+/**
+ * Save enrichment results to disk.
+ */
+export async function saveEnrichment(
+  entries: SemanticMetadata[],
+  meta: { depth: EnrichDepth; tokensUsed: number },
+  rootDir: string,
+): Promise<void> {
+  const dir = await ensureStorageDir(rootDir);
+  const enrichment: SerializedEnrichment = {
+    version: 1,
+    enrichedAt: new Date().toISOString(),
+    depth: meta.depth,
+    tokensUsed: meta.tokensUsed,
+    entries,
+  };
+  await writeFile(join(dir, 'enrichment.json'), JSON.stringify(enrichment, null, 2), 'utf-8');
+}
+
+/**
+ * Load enrichment data from disk. Returns null if no enrichment file exists.
+ */
+export async function loadEnrichment(rootDir: string): Promise<SerializedEnrichment | null> {
+  const enrichPath = join(storageDir(rootDir), 'enrichment.json');
+  let content: string;
+  try {
+    content = await readFile(enrichPath, 'utf-8');
+  } catch {
+    return null;
+  }
+
+  try {
+    return JSON.parse(content) as SerializedEnrichment;
+  } catch {
+    return null;
+  }
+}
+
+/**
+ * Save a Mermaid diagram to disk.
+ * Returns the full path of the written file.
+ */
+export async function saveMermaid(
+  mermaid: string,
+  rootDir: string,
+  filename = 'architecture.mmd',
+): Promise<string> {
+  const dir = await ensureStorageDir(rootDir);
+  const filePath = join(dir, filename);
+  await writeFile(filePath, mermaid, 'utf-8');
+  return filePath;
+}
+
+/**
+ * Check if the .jam or .jam/intel directory is listed in the project's .gitignore.
+ */
+export function checkGitignore(rootDir: string): boolean {
+  // Synchronous read — intentional to keep the API simple for a quick status check
+  let content: string;
+  try {
+    // Use synchronous fs here via a dynamic require pattern — but we avoid require in ESM.
+    // Instead, read synchronously using the lower-level approach.
+    // We use readFileSync from 'node:fs' (not node:fs/promises)
+    // eslint-disable-next-line @typescript-eslint/no-require-imports
+    const fs = require('node:fs') as typeof import('node:fs');
+    content = fs.readFileSync(join(rootDir, '.gitignore'), 'utf-8');
+  } catch {
+    return false;
+  }
+
+  return content.includes('.jam/intel') || content.includes('.jam');
+}
diff --git a/src/intel/types.ts b/src/intel/types.ts
new file mode 100644
index 0000000..28197a2
--- /dev/null
+++ b/src/intel/types.ts
@@ -0,0 +1,79 @@
+// src/intel/types.ts
+
+export type NodeType =
+  | 'repo' | 'service' | 'module' | 'file'
+  | 'class' | 'function' | 'endpoint'
+  | 'table' | 'schema' | 'queue' | 'event'
+  | 'config' | 'external';
+
+export type EdgeType =
+  | 'imports' | 'calls'
+  | 'reads' | 'writes'
+  | 'publishes' | 'subscribes'
+  | 'exposes' | 'consumes'
+  | 'contains' | 'configures'
+  | 'deploys-with' | 'depends-on';
+
+export type EnrichDepth = 'shallow' | 'deep' | 'none';
+
+export interface IntelNode {
+  id: string;
+  type: NodeType;
+  name: string;
+  filePath?: string;
+  line?: number;
+  language?: string;
+  framework?: string;
+  metadata: Record<string, unknown>;
+}
+
+export interface IntelEdge {
+  source: string;
+  target: string;
+  type: EdgeType;
+  metadata?: Record<string, unknown>;
+}
+
+export interface SemanticMetadata {
+  nodeId: string;
+  purpose?: string;
+  pattern?: string;
+  domain?: string;
+  risk?: 'low' | 'medium' | 'high';
+  summary?: string;
+  semanticEdges?: Array<{ target: string; type: EdgeType; reason: string }>;
+  enrichedAt?: string;
+  depth: EnrichDepth;
+}
+
+export interface SerializedGraph {
+  version: 1;
+  scannedAt: string;
+  rootDir: string;
+  nodeCount: number;
+  edgeCount: number;
+  nodes: IntelNode[];
+  edges: IntelEdge[];
+  frameworks: string[];
+  languages: string[];
+  mtimes: Record<string, number>;
+}
+
+export interface SerializedEnrichment {
+  version: 1;
+  enrichedAt: string;
+  depth: EnrichDepth;
+  tokensUsed: number;
+  entries: SemanticMetadata[];
+}
+
+export interface IntelStats {
+  nodeCount: number;
+  edgeCount: number;
+  fileCount: number;
+  languages: string[];
+  frameworks: string[];
+  enrichmentProgress: number;
+  tokensUsed: number;
+  lastScannedAt?: string;
+}
diff --git a/src/intel/viewer.ts b/src/intel/viewer.ts
new file mode 100644
index 0000000..84e6b00
--- /dev/null
+++ b/src/intel/viewer.ts
@@ -0,0 +1,192 @@
+// src/intel/viewer.ts
+
+import { exec } from 'node:child_process';
+import { promisify } from 'node:util';
+
+const execAsync = promisify(exec);
+
+/**
+ * Generate a standalone HTML page that renders a Mermaid diagram.
+ *
+ * Features:
+ * - Embeds Mermaid.js from CDN
+ * - Dark theme (dark background, light text)
+ * - Auto-polls the .mmd file for changes every 3 seconds and reloads
+ */
+export function generateViewerHtml(mermaidContent: string, mmdFilePath: string): string {
+  // Escape the mermaid content and file path for safe embedding
+  const escapedContent = mermaidContent
+    .replace(/\\/g, '\\\\')
+    .replace(/`/g, '\\`')
+    .replace(/\$/g, '\\$');
+
+  const escapedFilePath = mmdFilePath.replace(/\\/g, '\\\\').replace(/'/g, "\\'");
+
+  return `<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>Jam Intel — Architecture Diagram</title>
+  <script src="https://cdn.jsdelivr.net/npm/mermaid@10/dist/mermaid.min.js"></script>
+  <style>
+    * { box-sizing: border-box; margin: 0; padding: 0; }
+    body {
+      background: #1a1a2e;
+      color: #e0e0e0;
+      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+      min-height: 100vh;
+      display: flex;
+      flex-direction: column;
+    }
+    header {
+      background: #16213e;
+      padding: 12px 24px;
+      border-bottom: 1px solid #0f3460;
+      display: flex;
+      align-items: center;
+      gap: 12px;
+    }
+    header h1 {
+      font-size: 1.1rem;
+      font-weight: 600;
+      color: #e94560;
+    }
+    header .filepath {
+      font-size: 0.8rem;
+      color: #888;
+      font-family: monospace;
+    }
+    .status {
+      margin-left: auto;
+      font-size: 0.75rem;
+      color: #4caf50;
+    }
+    .status.stale { color: #ff9800; }
+    main {
+      flex: 1;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      padding: 24px;
+      overflow: auto;
+    }
+    #diagram {
+      background: #0d1117;
+      border-radius: 8px;
+      padding: 32px;
+      border: 1px solid #30363d;
+      max-width: 100%;
+      overflow: auto;
+    }
+    #error {
+      color: #f44336;
+      font-family: monospace;
+      background: #1a1a1a;
+      padding: 16px;
+      border-radius: 4px;
+      display: none;
+    }
+    .mermaid svg {
+      max-width: 100%;
+      height: auto;
+    }
+  </style>
+</head>
+<body>
+  <header>
+    <h1>Jam Intel</h1>
+    <span class="filepath">${mmdFilePath}</span>
+    <span class="status" id="status">Live</span>
+  </header>
+  <main>
+    <div id="diagram">
+      <div class="mermaid" id="mermaid-container">${mermaidContent}</div>
+      <div id="error"></div>
+    </div>
+  </main>
+
+  <script>
+    // Initialize Mermaid with dark theme
+    mermaid.initialize({
+      startOnLoad: true,
+      theme: 'dark',
+      themeVariables: {
+        primaryColor: '#1e3a5f',
+        primaryTextColor: '#e0e0e0',
+        primaryBorderColor: '#4a90d9',
+        lineColor: '#6fa3d4',
+        sectionBkgColor: '#16213e',
+        altSectionBkgColor: '#0d1b2a',
+        gridColor: '#2d3748',
+        secondaryColor: '#2d3748',
+        tertiaryColor: '#1a2940',
+      },
+      securityLevel: 'loose',
+    });
+
+    // Current content for change detection
+    let currentContent = \`${escapedContent}\`;
+    const mmdFilePath = '${escapedFilePath}';
+    const statusEl = document.getElementById('status');
+    const errorEl = document.getElementById('error');
+
+    /**
+     * Poll the .mmd file for changes via fetch (file:// URLs support this in some browsers).
+     * Falls back gracefully if fetch fails.
+     */
+    async function checkForChanges() {
+      try {
+        const res = await fetch(mmdFilePath, { cache: 'no-store' });
+        if (!res.ok) return;
+        const newContent = await res.text();
+        if (newContent !== currentContent) {
+          currentContent = newContent;
+          await rerender(newContent);
+          statusEl.textContent = 'Updated ' + new Date().toLocaleTimeString();
+          statusEl.className = 'status';
+        }
+      } catch {
+        // Fetch may fail for file:// — that's OK, we just won't auto-reload
+      }
+    }
+
+    async function rerender(content) {
+      const container = document.getElementById('mermaid-container');
+      errorEl.style.display = 'none';
+      try {
+        container.removeAttribute('data-processed');
+        container.textContent = content;
+        await mermaid.run({ nodes: [container] });
+      } catch (err) {
+        errorEl.style.display = 'block';
+        errorEl.textContent = 'Diagram error: ' + err.message;
+      }
+    }
+
+    // Poll every 3 seconds
+    setInterval(checkForChanges, 3000);
+  </script>
+</body>
+</html>
+`;
+}
+
+/**
+ * Open an HTML file in the default browser.
+ * Supports macOS, Linux, and Windows.
+ */
+export async function openInBrowser(htmlPath: string): Promise<void> {
+  const platform = process.platform;
+  let cmd: string;
+
+  if (platform === 'darwin') {
+    cmd = `open "${htmlPath}"`;
+  } else if (platform === 'win32') {
+    cmd = `start "" "${htmlPath}"`;
+  } else {
+    cmd = `xdg-open "${htmlPath}"`;
+  }
+
+  await execAsync(cmd);
+}