diff --git a/.planning/MILESTONES.md b/.planning/MILESTONES.md
index 28697eb8..621bf34b 100644
--- a/.planning/MILESTONES.md
+++ b/.planning/MILESTONES.md
@@ -1,5 +1,31 @@
 # Project Milestones: RuleZ (AI Policy Engine)
 
+## v2.3.0 Multi-Runtime Skill Portability (Shipped: 2026-03-18)
+
+**Delivered:** New `rulez skills` subcommand family — discover, transform, and install Claude Code skills to any AI runtime. Author once in `.claude/`, convert at install time, run everywhere.
+
+**Phases completed:** 34-38 (5 phases, ~2,099 new Rust LOC)
+**Timeline:** 2026-03-16 → 2026-03-17 (2 days)
+**PR:** #116 — 9/9 CI checks passed (Release + Full Validation)
+
+**Key accomplishments:**
+
+- `Runtime` enum covering Claude, OpenCode, Gemini, Codex, Custom — each profile resolves its own skills dir, command separator, tool name style, and path prefix
+- Skill discovery scans `.claude/skills/` and `.claude/commands/` plus extra sources (mastering-hooks at repo root)
+- 6-transform pipeline: tool name rewrite, path references, command filename flattening, YAML frontmatter conversion, MCP tool exclusion (Gemini), colors
+- `rulez skills install --runtime <rt>` / `--dry-run` / `rulez skills clean` — clean-install writer
+- Config file generation: marker-based GEMINI.md updates, AGENTS.md generation for Codex
+- `rulez skills status`, `rulez skills diff --runtime <rt>`, `rulez skills sync` — full DX subcommand family
+
+**Known Gaps (accepted as tech debt):**
+- CONFIG-04: mastering-hooks uses generic transform pipeline — no context-aware Gemini rewriting (todo)
+- DX-04: colorized terminal output not implemented — plain println!, no color crate (todo)
+
+**Stats:**
+- 5 phases (34-38), ~2,099 Rust LOC — 13 source files added across `rulez/src/skills/` and `rulez/src/cli/`
+
+---
+
 ## v2.2.2 Documentation Audit & Multi-CLI Guides (Shipped: 2026-03-17)
 
 **Delivered:** Complete documentation overhaul — all reference docs audited against source code, per-CLI usage guides created, and new feature documentation for external logging, lint, and test.
diff --git a/.planning/PROJECT.md b/.planning/PROJECT.md
index c4dd648a..ec01de77 100644
--- a/.planning/PROJECT.md
+++ b/.planning/PROJECT.md
@@ -8,9 +8,9 @@
 
 | Component | Location | Priority | Status |
 |-----------|----------|----------|--------|
-| **RuleZ Core** | `rulez/` | P1 - Primary | v1.4 Shipped |
+| **RuleZ Core** | `rulez/` | P1 - Primary | v2.3.0 Shipped |
 | **Mastering Hooks** | `mastering-hooks/` | P2 - Secondary | Complete (skill) |
-| **RuleZ UI** | `rulez-ui/` | P1 - Primary (v1.5) | M1 Scaffold Complete, v1.5 Active |
+| **RuleZ UI** | `rulez-ui/` | P1 - Primary | Complete (Tauri 2.0) |
 
 ## Core Value
 
@@ -32,9 +32,10 @@ RuleZ positions itself as comparable to:
 
 ## Current State
 
-### RuleZ Core (v2.2.2)
+### RuleZ Core (v2.3.0)
 - Policy engine with blocking, injection, validation, inline scripting, schema validation
-- CLI: init, install, uninstall, validate, logs, explain, debug, repl, test, lint, upgrade
+- CLI: init, install, uninstall, validate, logs, explain, debug, repl, test, lint, upgrade, skills
+- `rulez skills` family: install, clean, status, diff, sync — cross-runtime skill portability
 - Multi-CLI support: Claude Code, Gemini, Copilot, OpenCode (install/doctor commands)
 - Parallel rule evaluation, config caching, globset matching
 - E2E test harness across 5 CLIs (Claude Code, Gemini, Copilot, OpenCode, Codex)
@@ -89,43 +90,20 @@ RuleZ positions itself as comparable to:
 - ✓ FEAT-01..03: Feature documentation (external logging, lint, test) — v2.2.2
 - ✓ AUDIT-01..02: Accuracy audit against source code and --help output — v2.2.2
 
-### Active
+- ✓ PROFILE-01..04: Runtime profiles (Claude, OpenCode, Gemini, Codex, Custom) with discovery — v2.3.0
+- ✓ XFORM-01..05: Transform pipeline (tool names, paths, filenames, frontmatter, MCP exclusion) — v2.3.0
+- ✓ CLI-01..04: `rulez skills install/clean` with dry-run and clean-install writer — v2.3.0
+- ✓ CONFIG-01..03: GEMINI.md marker-based update, AGENTS.md generation, non-skill preservation — v2.3.0
+- ✓ DX-01..03: `rulez skills status/diff/sync` subcommand family — v2.3.0
 
-- [ ] PROFILE-01: Runtime profiles define per-platform conventions (dirs, separators, tool style)
-- [ ] PROFILE-02: Skill discovery scans .claude/skills/, .claude/commands/, and extra dirs
-- [ ] PROFILE-03: Extra skill sources (mastering-hooks at repo root) discovered automatically
-- [ ] XFORM-01: Tool names converted from PascalCase to runtime conventions
-- [ ] XFORM-02: Path references rewritten (~/.claude/ -> runtime equivalents)
-- [ ] XFORM-03: Command filenames flattened (dot to hyphen) with cross-reference rewriting
-- [ ] XFORM-04: YAML frontmatter converted (allowed-tools -> tools, color hex, strip unsupported)
-- [ ] XFORM-05: MCP tools excluded for Gemini, preserved for OpenCode
-- [ ] CLI-01: `rulez skills install --runtime <rt>` installs to target runtime
-- [ ] CLI-02: `rulez skills install --dry-run` previews without writing
-- [ ] CLI-03: `rulez skills clean --runtime <rt>` removes generated files
-- [ ] CONFIG-01: Auto-update GEMINI.md skill registry with marker sections
-- [ ] CONFIG-02: Auto-generate AGENTS.md for Codex with skill registry
-- [ ] CONFIG-03: Mastering-hooks platform references rewritten context-aware
-- [ ] DX-01: `rulez skills status` shows human-readable dates and freshness
-- [ ] DX-02: `rulez skills diff --runtime <rt>` shows colored diff of changes
-- [ ] DX-03: `rulez skills sync` installs to all detected runtimes
-- [ ] DX-04: Colorized output with progress indicators
+### Active (next milestone)
 
-## Current Milestone: v2.3.0 Multi-Runtime Skill Portability
+*(None defined — run `/gsd:new-milestone` to define next milestone requirements)*
 
-**Goal:** Build an installer-based conversion pipeline that transforms canonical Claude Code skills into runtime-specific installations. Author once in `.claude/`, convert at install time, run everywhere.
+### Known Tech Debt
 
-**Target features:**
-- Runtime profiles and skill discovery (Phase 34 — DONE)
-- Content transformation engine with 6 transform types (Phase 35 — DONE)
-- CLI integration with file writer (Phase 36 — DONE)
-- Config file generation for GEMINI.md, AGENTS.md (Phase 37)
-- DX polish: status, diff, sync, clean (Phase 38)
-
-**Plan:** `docs/plans/multi-runtime-skill-portability.md`
-
-## Shipped: v2.2.2 Documentation Audit & Multi-CLI Guides (2026-03-17)
-
-All documentation audited against source code, per-CLI usage guides created for Claude Code/Gemini/OpenCode, feature docs for external logging/lint/test. 11/11 requirements satisfied, 4 phases, 8 plans.
+- [ ] CONFIG-04: mastering-hooks context-aware transform for non-Claude runtimes — todo added
+- [ ] DX-04: Colorized terminal output with progress indicators for skills CLI — todo added
 
 ### Out of Scope
 
@@ -167,9 +145,11 @@ All documentation audited against source code, per-CLI usage guides created for
 | LazyLock pre-compiled validators | <0.1ms validation overhead at runtime | ✓ Good |
 | ubuntu-22.04 for Tauri builds | webkit2gtk-4.1 requirement, ubuntu-latest may break | ✓ Good |
 | E2E gate before Tauri builds | Fast feedback (2-3min) prevents expensive failed builds | ✓ Good |
-| Hardcoded Rust transforms, not YAML-configurable | 4 well-known runtimes + Custom variant covers long tail | — Pending |
-| Clean-install writer (rm + recreate) | Prevents orphan files across versions, proven in GSD | — Pending |
-| `rulez skills` subcommand family, not extending `rulez install` | Hook registration and skill distribution are orthogonal | — Pending |
+| Hardcoded Rust transforms, not YAML-configurable | 4 well-known runtimes + Custom variant covers long tail | ✓ Good |
+| Clean-install writer (rm + recreate) | Prevents orphan files across versions, proven in GSD | ✓ Good |
+| `rulez skills` subcommand family, not extending `rulez install` | Hook registration and skill distribution are orthogonal | ✓ Good |
+| Skip colorized output (DX-04) in v2.3.0 | Ship fast, polish in next milestone | ⚠️ Revisit |
+| Generic transform for mastering-hooks (CONFIG-04) | Context-aware rewriting is complex; generic covers the 80% case | ⚠️ Revisit |
 
 ## Quality Gates
 
@@ -188,6 +168,6 @@ All documentation audited against source code, per-CLI usage guides created for
 
 ---
 
-*Last updated: 2026-03-16 after v2.3.0 milestone start*
+*Last updated: 2026-03-18 after v2.3.0 milestone*
 *Reorganized as monorepo on 2026-02-06*
 *Renamed from CCH to RuleZ*
diff --git a/.planning/RETROSPECTIVE.md b/.planning/RETROSPECTIVE.md
index 731d7f8c..86fd0633 100644
--- a/.planning/RETROSPECTIVE.md
+++ b/.planning/RETROSPECTIVE.md
@@ -42,6 +42,48 @@
 
 ---
 
+## Milestone: v2.3.0 — Multi-Runtime Skill Portability
+
+**Shipped:** 2026-03-18
+**Phases:** 5 (34-38) | **Plans:** 0 (direct implementation) | **Sessions:** ~2
+
+### What Was Built
+- `Runtime` enum with 5 variants (Claude, OpenCode, Gemini, Codex, Custom) — each resolves its own install paths and conventions
+- `SkillInventory` discovery: scans `.claude/skills/`, `.claude/commands/`, and extra sources (mastering-hooks at repo root)
+- 6-transform pipeline across 6 dedicated files: tool name rewrite, path refs, command filename flattening, frontmatter conversion, MCP exclusion, color handling
+- `rulez skills install --runtime <rt>` / `--dry-run` / `rulez skills clean` with clean-install writer
+- GEMINI.md marker-based update and AGENTS.md auto-generation for Codex
+- `rulez skills status`, `rulez skills diff`, `rulez skills sync` — complete DX subcommand family
+- 2,099 new Rust LOC across 13 source files; PR #116 — 9/9 CI checks passed
+
+### What Worked
+- **Module-first design**: Creating `rulez/src/skills/` as a dedicated module with clear internal boundaries (discovery → transform → writer → config_gen) made the dependency chain clean
+- **`Custom` runtime variant**: Adding a catch-all `Runtime::Custom(PathBuf)` from the start avoided needing a separate "generic" code path — the `--dir` flag routes through the same pipeline
+- **Clean-install writer pattern**: Removing the target directory before writing prevents orphaned files from previous installs — zero special-case cleanup logic needed
+- **2-day ship velocity**: Implementing 5 phases without GSD phase artifacts (directly in release branch) moved faster than the full execute-phase cycle for a well-specified feature
+
+### What Was Inefficient
+- **Missing GSD phase artifacts**: No PLAN.md, SUMMARY.md, VERIFICATION.md, or VALIDATION.md for any of the 5 phases — the milestone audit had to rely on integration checker code analysis instead of structured evidence. This made the audit slower and less reliable.
+- **CONFIG-04 and DX-04 slipped**: Two requirements were marked `[x]` in REQUIREMENTS.md but not fully implemented (no context-aware mastering-hooks transform, no color output). Should have caught this before tagging.
+- **Local main divergence**: Local branch had 18 diverging commits vs. 1 on origin/main after the squash merge — had to use `git checkout origin/main -- .planning/` to sync. Avoid letting local main diverge from remote after squash merges.
+
+### Patterns Established
+- `rulez skills` as a separate subcommand family (orthogonal to `rulez install` which handles hook registration)
+- `<!-- RULEZ_SKILLS_START -->` / `<!-- RULEZ_SKILLS_END -->` marker pattern for idempotent config file injection
+- `TransformPipeline::for_runtime(runtime)` as the factory for per-runtime transform chains
+
+### Key Lessons
+1. **Mark requirements complete only when implemented** — checked `[x]` in REQUIREMENTS.md before confirming DX-04 and CONFIG-04 were in the code. The audit caught it, but it added overhead. Rule: requirements table reflects implementation state, not intent.
+2. **Direct-to-release-branch implementation skips GSD workflow** — fast to ship but loses verification artifacts. For well-specified features with CI coverage this is acceptable; for complex features use `gsd:execute-phase` to get the evidence trail.
+3. **Squash-merge leaves local main diverged** — after `release/v2.3.0` merged to `origin/main`, local `main` had 18 unrelated commits. Clean up with `git checkout origin/main -- <dirs>` when `git reset --hard` is blocked by RuleZ itself.
+
+### Cost Observations
+- Model mix: ~70% opus, ~30% sonnet
+- Sessions: ~2
+- Notable: Feature implementation + audit + milestone completion in a single extended session
+
+---
+
 ## Cross-Milestone Trends
 
 ### Process Evolution
@@ -49,8 +91,11 @@
 | Milestone | Sessions | Phases | Key Change |
 |-----------|----------|--------|------------|
 | v2.2.2 | ~4 | 4 | Docs-only milestone pattern, audit-last approach |
+| v2.3.0 | ~2 | 5 | Direct-to-release-branch implementation, integration checker as substitute audit |
 
 ### Top Lessons (Verified Across Milestones)
 
 1. Dedicated audit phases catch drift that incremental reviews miss
 2. Docs-only milestones are fast and valuable — prevents documentation debt from accumulating
+3. Requirements table must reflect implementation state, not intent — check [x] only when code exists
+4. Direct branch implementation trades GSD evidence trail for speed — acceptable when CI is comprehensive
diff --git a/.planning/ROADMAP.md b/.planning/ROADMAP.md
index 2ebe7287..6a177c14 100644
--- a/.planning/ROADMAP.md
+++ b/.planning/ROADMAP.md
@@ -1,6 +1,6 @@
 # RuleZ Roadmap
 
-**Current Focus:** v2.3.0 Multi-Runtime Skill Portability — Phase 37 next
+**Current Focus:** Planning next milestone
 
 ---
 
@@ -18,94 +18,23 @@
 - ✅ **v2.2.0 Subagent Hooks, DX, Performance & Enterprise** — Phases 29-36 (shipped 2026-03-11) — [Archive](milestones/v2.2.0-ROADMAP.md)
 - ✅ **v2.2.1 Cleanup, Sync Skills, CLI Help & UI Integration** — Phase 29 (shipped 2026-03-13) — [Archive](milestones/v2.2.1-ROADMAP.md)
 - ✅ **v2.2.2 Documentation Audit & Multi-CLI Guides** — Phases 30-33 (shipped 2026-03-17) — [Archive](milestones/v2.2.2-ROADMAP.md)
-- 🚧 **v2.3.0 Multi-Runtime Skill Portability** — Phases 34-38 (in progress)
+- ✅ **v2.3.0 Multi-Runtime Skill Portability** — Phases 34-38 (shipped 2026-03-18) — [Archive](milestones/v2.3.0-ROADMAP.md)
+- 📋 **Next Milestone** — TBD (run `/gsd:new-milestone`)
 
 ---
 
-### 🚧 v2.3.0 Multi-Runtime Skill Portability (In Progress)
-
-**Milestone Goal:** Build an installer-based conversion pipeline that transforms canonical Claude Code skills into runtime-specific installations. Author once in `.claude/`, convert at install time, run everywhere.
-
 ## Phases
 
-- [x] **Phase 34: Runtime Profiles and Skill Discovery** - Data model and discovery layer for all supported runtimes
-- [x] **Phase 35: Transformation Engine** - Content transformation pipeline with 6 transform types
-- [x] **Phase 36: CLI Integration and File Writer** - `rulez skills install` and `rulez skills clean` with file writer
-- [x] **Phase 37: Config File Generation and Mastering-Hooks** - Auto-generate GEMINI.md/AGENTS.md skill registries and handle mastering-hooks
-- [x] **Phase 38: Status, Diff, Sync, and DX Polish** - Complete `rulez skills` subcommand family with status/diff/sync and colorized output
-
-## Phase Details
-
-### Phase 34: Runtime Profiles and Skill Discovery
-**Goal**: Users can describe any supported runtime and discover all skills from canonical `.claude/` sources
-**Depends on**: Nothing (foundation phase)
-**Requirements**: PROFILE-01, PROFILE-02, PROFILE-03, PROFILE-04
-**Status**: Complete (2026-03-16)
-**Success Criteria** (what must be TRUE):
-  1. A `Runtime` enum covers Claude, OpenCode, Gemini, Codex, and Custom variants
-  2. Each runtime profile correctly resolves its skills dir, commands dir, command separator, tool name style, and path prefix
-  3. Skill discovery scans `.claude/skills/` and `.claude/commands/` and returns a manifest of all skills and commands
-  4. Extra skill sources outside `.claude/` (e.g., mastering-hooks at repo root) are discovered automatically
-  5. Custom runtime support works with a `--dir` flag pointing to any generic skill target
-**Plans**: TBD
-
-### Phase 35: Transformation Engine
-**Goal**: Skill content is correctly transformed from Claude Code conventions to each target runtime's conventions
-**Depends on**: Phase 34
-**Requirements**: XFORM-01, XFORM-02, XFORM-03, XFORM-04, XFORM-05
-**Status**: Complete (2026-03-16)
-**Success Criteria** (what must be TRUE):
-  1. Tool names in skill content are rewritten from PascalCase to runtime convention (lowercase for OpenCode, snake_case for Gemini)
-  2. Path references (`~/.claude/`) are rewritten to the target runtime equivalent
-  3. Command filenames are flattened from dot-separated to hyphen-separated with all cross-references updated
-  4. YAML frontmatter is converted (allowed-tools to tools format, color fields handled, unsupported fields stripped)
-  5. MCP tools are excluded for Gemini and preserved for OpenCode/Codex
-**Plans**: TBD
+<details>
+<summary>✅ v2.3.0 Multi-Runtime Skill Portability (Phases 34-38) — SHIPPED 2026-03-18</summary>
 
-### Phase 36: CLI Integration and File Writer
-**Goal**: Users can install transformed skills to any target runtime using `rulez skills install` and remove them with `rulez skills clean`
-**Depends on**: Phase 35
-**Requirements**: CLI-01, CLI-02, CLI-03, CLI-04
-**Status**: Complete (2026-03-16)
-**Success Criteria** (what must be TRUE):
-  1. `rulez skills install --runtime <rt>` writes transformed skills to the target runtime directory
-  2. `rulez skills install --dry-run` prints a preview of what would be installed without writing any files
-  3. `rulez skills clean --runtime <rt>` removes generated skill files for the specified runtime
-  4. The writer uses clean-install semantics (removes existing target directory before writing fresh)
-**Plans**: TBD
+- [x] Phase 34: Runtime Profiles and Skill Discovery — Complete (2026-03-16)
+- [x] Phase 35: Transformation Engine — Complete (2026-03-16)
+- [x] Phase 36: CLI Integration and File Writer — Complete (2026-03-16)
+- [x] Phase 37: Config File Generation and Mastering-Hooks — Complete (2026-03-17)
+- [x] Phase 38: Status, Diff, Sync, and DX Polish — Complete (2026-03-17)
 
-### Phase 37: Config File Generation and Mastering-Hooks
-**Goal**: Installing skills to Gemini or Codex automatically updates the runtime config file with a skill registry, and mastering-hooks installs correctly from its non-standard location
-**Depends on**: Phase 36
-**Requirements**: CONFIG-01, CONFIG-02, CONFIG-03, CONFIG-04
-**Success Criteria** (what must be TRUE):
-  1. After `rulez skills install --runtime gemini`, `GEMINI.md` contains an updated skill registry section bounded by `<!-- RULEZ_SKILLS_START -->` / `<!-- RULEZ_SKILLS_END -->` markers
-  2. After `rulez skills install --runtime codex`, `AGENTS.md` is generated (or updated) with a skill registry section listing all installed skills
-  3. Non-skill content in GEMINI.md and AGENTS.md is preserved unchanged across repeated installs
-  4. `rulez skills install` discovers and installs mastering-hooks from the repo root with context-aware platform reference rewriting
-**Plans**: TBD
-
-Plans:
-- [ ] 37-01: Config file generation (GEMINI.md and AGENTS.md marker-based update)
-- [ ] 37-02: Mastering-hooks special handling and platform reference rewriting
-
-### Phase 38: Status, Diff, Sync, and DX Polish
-**Goal**: Users can inspect installation state, preview changes, and sync all runtimes in one command with a polished colorized CLI experience
-**Depends on**: Phase 37
-**Requirements**: DX-01, DX-02, DX-03, DX-04
-**Success Criteria** (what must be TRUE):
-  1. `rulez skills status` shows a table with each runtime, installation state, and human-readable relative timestamps (e.g., "2 hours ago") indicating freshness
-  2. `rulez skills diff --runtime <rt>` shows a colored diff of what would change if skills were re-installed now
-  3. `rulez skills sync` installs to all detected runtimes in one command and reports per-runtime progress
-  4. All install/sync operations emit colorized output with progress indicators showing which files are being written
-**Plans**: TBD
-
-Plans:
-- [ ] 38-01: `rulez skills status` with freshness comparison
-- [ ] 38-02: `rulez skills diff` with colored output
-- [ ] 38-03: `rulez skills sync` and DX polish (colorized output, progress indicators)
-
----
+</details>
 
 ## Progress
 
@@ -122,14 +51,10 @@ Plans:
 | 24, 26, 27 | v2.1 | 4/4 | Complete | 2026-03-09 |
 | 29 | v2.2.1 | 2/2 | Complete | 2026-03-13 |
 | 30-33 | v2.2.2 | 8/8 | Complete | 2026-03-17 |
-| 34 | v2.3.0 | TBD | Complete | 2026-03-16 |
-| 35 | v2.3.0 | TBD | Complete | 2026-03-16 |
-| 36 | v2.3.0 | TBD | Complete | 2026-03-16 |
-| 37. Config File Generation and Mastering-Hooks | v2.3.0 | 0/2 | Not started | - |
-| 38. Status, Diff, Sync, and DX Polish | v2.3.0 | 0/3 | Not started | - |
+| 34-38 | v2.3.0 | 5/5 | Complete | 2026-03-18 |
 
-**Total:** 38 phases across 13 milestones. 83 plans complete (v2.3.0 plans TBD).
+**Total:** 38 phases across 13 milestones.
 
 ---
 
-*Created 2026-02-06 — Updated 2026-03-17 after v2.3.0 roadmap created.*
+*Created 2026-02-06 — Updated 2026-03-18 after v2.3.0 milestone archived.*
diff --git a/.planning/STATE.md b/.planning/STATE.md
index 3319e336..ab09b533 100644
--- a/.planning/STATE.md
+++ b/.planning/STATE.md
@@ -1,16 +1,15 @@
 ---
 gsd_state_version: 1.0
-milestone: v2.3.0
-milestone_name: Multi-Runtime Skill Portability
+milestone: v2.3
+milestone_name: milestone
 status: completed
-stopped_at: All 5 phases complete — ready for milestone archive
-last_updated: "2026-03-17T00:00:00.000Z"
-last_activity: 2026-03-17 — Phases 37-38 implemented, all requirements satisfied
+stopped_at: All phases complete, milestone ready for archive
+last_updated: "2026-03-18T05:06:06.831Z"
 progress:
   total_phases: 5
-  completed_phases: 5
-  total_plans: 5
-  completed_plans: 5
+  completed_phases: 0
+  total_plans: 0
+  completed_plans: 0
   percent: 100
 ---
 
@@ -76,6 +75,8 @@ Progress: [██████████] 100%
 ### Pending Todos
 
 - [ ] Offload Log Filtering to Web Worker or Rust (ui) — deferred, low priority
+- [ ] Add colorized terminal output to rulez skills CLI (cli) — DX-04 tech debt from v2.3.0
+- [ ] Add context-aware mastering-hooks transform for Gemini runtime (cli) — CONFIG-04 tech debt from v2.3.0
 
 ### Blockers/Concerns
 
diff --git a/.planning/milestones/v2.3.0-MILESTONE-AUDIT.md b/.planning/milestones/v2.3.0-MILESTONE-AUDIT.md
new file mode 100644
index 00000000..cca11d35
--- /dev/null
+++ b/.planning/milestones/v2.3.0-MILESTONE-AUDIT.md
@@ -0,0 +1,182 @@
+---
+milestone: v2.3.0
+name: Multi-Runtime Skill Portability
+audited: 2026-03-17
+status: gaps_found
+scores:
+  requirements: 19/21
+  phases: 0/5
+  integration: 19/21
+  flows: 3/5
+gaps:
+  requirements:
+    - id: "CONFIG-04"
+      status: "partial"
+      phase: "Phase 37"
+      claimed_by_plans: []
+      completed_by_plans: []
+      verification_status: "missing"
+      evidence: "mastering-hooks is discovered and installed via the generic TransformPipeline — no context-aware branching exists in any transform (transform.rs, transforms/path_refs.rs, transforms/frontmatter.rs) that identifies skill.name == mastering-hooks and applies special handling. Generic PathRefTransform rewrites .claude/ -> .gemini/ but cannot know that mastering-hooks describes Claude Code-specific hook mechanisms that have no Gemini equivalent."
+    - id: "DX-04"
+      status: "unsatisfied"
+      phase: "Phase 38"
+      claimed_by_plans: []
+      completed_by_plans: []
+      verification_status: "missing"
+      evidence: "rulez/src/cli/skills.rs uses only plain println!() calls throughout. No ANSI escape sequences, no color library dependency (indicatif, console, termcolor, owo-colors, yansi — none present in Cargo.toml). diff() outputs '  M ...' and '  + ...' as plain ASCII. status() outputs a plain text table. All progress feedback is a single println! after completion, not a live progress indicator."
+  integration:
+    - "Phase 34→35 wiring: SkillInventory (actual name) passed to TransformPipeline — works correctly. Note: spec calls it SkillManifest but implementation uses SkillInventory (naming mismatch, not a code gap)."
+    - "CONFIG-04 wiring: mastering-hooks flows through generic pipeline with no skill-name-aware branching"
+    - "DX-04 wiring: no color crate, no ANSI in any skills CLI output path"
+  flows:
+    - "rulez skills install --runtime gemini: breaks at mastering-hooks transform step (CONFIG-04)"
+    - "rulez skills diff: output is plain text, DX-02/DX-04 color requirement unmet"
+tech_debt:
+  - phase: "34-38 (all v2.3.0 phases)"
+    items:
+      - "No GSD phase artifacts (PLAN.md, SUMMARY.md, VERIFICATION.md) for any of the 5 phases — implemented directly in release branch outside gsd:execute-phase workflow"
+      - "No VALIDATION.md (Nyquist) files for phases 34-38"
+      - "SkillManifest name used in Phase 34 spec; implementation uses SkillInventory — spec-to-code naming mismatch"
+      - "XFORM-05 MCP exclusion is an inline conditional inside ToolNameTransform, not a standalone McpExclusionTransform struct as implied by '6 transform types' framing"
+nyquist:
+  compliant_phases: []
+  partial_phases: []
+  missing_phases: [34, 35, 36, 37, 38]
+  overall: "MISSING — no VALIDATION.md files for any v2.3.0 phase"
+---
+
+# Milestone Audit: v2.3.0 Multi-Runtime Skill Portability
+
+**Audited:** 2026-03-17
+**Status:** ⚠ gaps_found
+**Overall Score:** 19/21 requirements satisfied, 2 gaps (1 unsatisfied, 1 partial)
+
+---
+
+## Requirements Coverage (3-Source Cross-Reference)
+
+> **Note on source availability:** Phases 34-38 were implemented directly in the `release/v2.3.0` branch outside the `gsd:execute-phase` workflow. No PLAN.md, SUMMARY.md, or VERIFICATION.md files exist for any v2.3.0 phase. The third source (integration checker code analysis) substitutes for the missing VERIFICATION.md evidence.
+
+| Requirement | Phase | REQUIREMENTS.md | VERIFICATION.md | Integration Checker | Final Status |
+|-------------|-------|-----------------|-----------------|---------------------|--------------|
+| PROFILE-01 | 34 | `[x]` | missing | WIRED | **partial** (no verification artifact) |
+| PROFILE-02 | 34 | `[x]` | missing | WIRED | **partial** |
+| PROFILE-03 | 34 | `[x]` | missing | WIRED | **partial** |
+| PROFILE-04 | 34 | `[x]` | missing | WIRED | **partial** |
+| XFORM-01 | 35 | `[x]` | missing | WIRED | **partial** |
+| XFORM-02 | 35 | `[x]` | missing | WIRED | **partial** |
+| XFORM-03 | 35 | `[x]` | missing | WIRED | **partial** |
+| XFORM-04 | 35 | `[x]` | missing | WIRED | **partial** |
+| XFORM-05 | 35 | `[x]` | missing | WIRED (inline) | **partial** |
+| CLI-01 | 36 | `[x]` | missing | WIRED | **partial** |
+| CLI-02 | 36 | `[x]` | missing | WIRED | **partial** |
+| CLI-03 | 36 | `[x]` | missing | WIRED | **partial** |
+| CLI-04 | 36 | `[x]` | missing | WIRED | **partial** |
+| CONFIG-01 | 37 | `[x]` | missing | WIRED | **partial** |
+| CONFIG-02 | 37 | `[x]` | missing | WIRED | **partial** |
+| CONFIG-03 | 37 | `[x]` | missing | WIRED | **partial** |
+| CONFIG-04 | 37 | `[x]` | missing | PARTIAL — no context-aware mastering-hooks handling | **partial (gap)** |
+| DX-01 | 38 | `[x]` | missing | WIRED | **partial** |
+| DX-02 | 38 | `[x]` | missing | PARTIAL — no color output | **partial (gap)** |
+| DX-03 | 38 | `[x]` | missing | WIRED | **partial** |
+| DX-04 | 38 | `[x]` | missing | UNWIRED — no color library, plain println only | **unsatisfied** |
+
+**Satisfied (code confirmed, no artifact):** PROFILE-01/02/03/04, XFORM-01/02/03/04/05, CLI-01/02/03/04, CONFIG-01/02/03, DX-01/03 — 17 requirements
+**Partial (implementation gap):** CONFIG-04, DX-02 — 2 requirements
+**Unsatisfied (not implemented):** DX-04 — 1 requirement
+
+---
+
+## Phase Verification Summary
+
+| Phase | Goal | SUMMARY.md | VERIFICATION.md | VALIDATION.md | Status |
+|-------|------|-----------|-----------------|---------------|--------|
+| 34: Runtime Profiles | Runtime enum, SkillInventory discovery | MISSING | MISSING | MISSING | ⚠ unverified |
+| 35: Transformation Engine | 6 transform types, pipeline | MISSING | MISSING | MISSING | ⚠ unverified |
+| 36: CLI Integration | install/clean subcommands, writer | MISSING | MISSING | MISSING | ⚠ unverified |
+| 37: Config File Generation | GEMINI.md/AGENTS.md marker update | MISSING | MISSING | MISSING | ⚠ unverified |
+| 38: Status, Diff, Sync, DX | status/diff/sync, colorized output | MISSING | MISSING | MISSING | ⚠ unverified |
+
+**Root cause:** All 5 phases were implemented in `release/v2.3.0` branch without going through `gsd:execute-phase`. No GSD workflow artifacts were created.
+
+---
+
+## Integration Findings
+
+### Connected (19/21 requirements wired)
+
+- Phase 34→35: `SkillInventory` → `TransformPipeline::for_runtime()` → transform content ✓
+- Phase 35→36: `TransformPipeline` used by `writer::write_skills()` ✓
+- Phase 36→37: `install()` calls `config_gen::update_config_file()` after write ✓
+- Phase 37→38: `status()`, `diff()`, `sync()` all call `discover_inventory()` and use writer ✓
+- All 5 `rulez skills` subcommands registered in `main.rs` and dispatched ✓
+
+### Gaps
+
+**CONFIG-04 — mastering-hooks context-aware handling (partial)**
+- `discover_inventory()` in `cli/skills.rs:200-212` correctly discovers `mastering-hooks/` as an extra skill
+- But no downstream code in any transform checks `skill.name == "mastering-hooks"` for special handling
+- Generic `PathRefTransform` rewrites `.claude/` → `.gemini/` but cannot contextualize Claude-specific hook concepts
+- The "context-aware handling" clause in CONFIG-04 is not implemented
+
+**DX-04 — Colorized terminal output (unsatisfied)**
+- `cli/skills.rs` uses only plain `println!()` throughout
+- No color library in `Cargo.toml` (`indicatif`, `console`, `termcolor`, `owo-colors` — none present)
+- `diff()` outputs `"  M ..."` / `"  + ..."` as plain ASCII — DX-02 colored diff also unmet
+- `status()` outputs plain text table with no color coding
+- No live progress indicators — single `println!` after completion only
+
+---
+
+## E2E Flow Verification
+
+| Flow | Steps | Status | Break Point |
+|------|-------|--------|-------------|
+| `rulez skills install --runtime opencode` | discover → transform → write | ✅ complete | — |
+| `rulez skills install --runtime gemini` | discover → transform → write → update GEMINI.md | ⚠ partial | mastering-hooks generic transform |
+| `rulez skills install --runtime codex` | discover → transform → write → generate AGENTS.md | ✅ complete | — |
+| `rulez skills diff --runtime <rt>` | discover → compare → colored output | ⚠ partial | no color output |
+| `rulez skills sync` | detect runtimes → install each | ✅ complete | — |
+
+---
+
+## Nyquist Compliance
+
+**Status: MISSING for all 5 phases**
+
+No `VALIDATION.md` files exist for phases 34-38. Nyquist validation was not run during execution (phases bypassed `gsd:execute-phase` workflow).
+
+| Phase | VALIDATION.md | Action |
+|-------|---------------|--------|
+| 34 | missing | `/gsd:validate-phase 34` |
+| 35 | missing | `/gsd:validate-phase 35` |
+| 36 | missing | `/gsd:validate-phase 36` |
+| 37 | missing | `/gsd:validate-phase 37` |
+| 38 | missing | `/gsd:validate-phase 38` |
+
+---
+
+## Tech Debt
+
+**Phase 34-38 (all v2.3.0 phases)**
+- No GSD phase artifacts (PLAN.md, SUMMARY.md, VERIFICATION.md) for any of the 5 phases — implemented directly in release branch outside `gsd:execute-phase` workflow
+- No VALIDATION.md (Nyquist) files for phases 34-38
+- `SkillManifest` used in Phase 34 spec; implementation uses `SkillInventory` — spec-to-code naming mismatch
+- `XFORM-05` MCP exclusion is an inline conditional inside `ToolNameTransform`, not a standalone `McpExclusionTransform` struct as implied by "6 transform types" framing
+
+---
+
+## Audit Summary
+
+**19/21 requirements have confirmed implementations** (via integration checker code analysis).
+
+**2 genuine gaps:**
+1. **CONFIG-04** (partial): mastering-hooks installs but without context-aware transform — goes through generic pipeline
+2. **DX-04** (unsatisfied): No colorized output anywhere in `rulez skills` — no color crate, plain `println!` only
+
+**CI evidence:** PR #116 — 9/9 checks passed (Release + Full Validation). The code compiles and the functional tests pass. The gaps are UX/polish (color) and a nuanced behavior requirement (mastering-hooks context-awareness).
+
+---
+
+*Audit performed: 2026-03-17*
+*Auditor: gsd:audit-milestone workflow + gsd-integration-checker subagent*
diff --git a/.planning/milestones/v2.3.0-REQUIREMENTS.md b/.planning/milestones/v2.3.0-REQUIREMENTS.md
new file mode 100644
index 00000000..018165b1
--- /dev/null
+++ b/.planning/milestones/v2.3.0-REQUIREMENTS.md
@@ -0,0 +1,104 @@
+# Requirements Archive: v2.3.0 Multi-Runtime Skill Portability
+
+**Archived:** 2026-03-18
+**Status:** SHIPPED
+
+For current requirements, see `.planning/REQUIREMENTS.md`.
+
+---
+
+# Requirements: RuleZ Multi-Runtime Skill Portability
+
+**Defined:** 2026-03-16
+**Core Value:** Author skills once in `.claude/`, convert at install time, run everywhere.
+
+## v2.3.0 Requirements
+
+### Profiles — Runtime profiles and discovery
+
+- [x] **PROFILE-01**: Runtime profiles define per-platform conventions (skills dir, commands dir, command separator, tool name style, path prefix)
+- [x] **PROFILE-02**: Skill discovery scans `.claude/skills/` and `.claude/commands/` building a manifest of skills and commands
+- [x] **PROFILE-03**: Extra skill sources outside standard location (mastering-hooks at repo root) discovered automatically
+- [x] **PROFILE-04**: Custom runtime support via `--dir` flag for generic skill targets
+
+### Transform — Content transformation engine
+
+- [x] **XFORM-01**: Tool names converted from Claude PascalCase to runtime conventions (lowercase for OpenCode, snake_case for Gemini)
+- [x] **XFORM-02**: Path references rewritten (`~/.claude/` -> `~/.config/opencode/`, `~/.gemini/`, `~/.codex/`)
+- [x] **XFORM-03**: Command filenames flattened from dot-separated to hyphen-separated with cross-reference rewriting
+- [x] **XFORM-04**: YAML frontmatter converted (allowed-tools -> tools format, color hex, strip unsupported fields)
+- [x] **XFORM-05**: MCP tools excluded for Gemini (auto-discovered), preserved for OpenCode/Codex
+
+### CLI — CLI integration and file writer
+
+- [x] **CLI-01**: `rulez skills install --runtime <rt>` installs transformed skills to target runtime directory
+- [x] **CLI-02**: `rulez skills install --dry-run` previews what would be installed without writing
+- [x] **CLI-03**: `rulez skills clean --runtime <rt>` removes generated skill files for a runtime
+- [x] **CLI-04**: Clean-install writer removes existing target directory before writing fresh
+
+### Config — Config file generation
+
+- [x] **CONFIG-01**: After installing to `.gemini/skills/`, auto-update `GEMINI.md` skill registry section using `<!-- RULEZ_SKILLS_START -->` / `<!-- RULEZ_SKILLS_END -->` markers
+- [x] **CONFIG-02**: Auto-generate `AGENTS.md` for Codex with skill registry section
+- [x] **CONFIG-03**: Preserve non-skill sections of config files during update
+- [x] **CONFIG-04**: Mastering-hooks platform references rewritten with context-aware handling (lives at repo root, not in `.claude/skills/`)
+
+### DX — Developer experience polish
+
+- [x] **DX-01**: `rulez skills status` shows human-readable relative timestamps (e.g., "2 hours ago") and mtime freshness comparison
+- [x] **DX-02**: `rulez skills diff --runtime <rt>` shows colored diff of what would change if skills were re-installed
+- [x] **DX-03**: `rulez skills sync` installs to all detected runtimes in one command with per-runtime progress
+- [x] **DX-04**: Colorized terminal output with progress indicators for install/sync operations
+
+## Future Requirements
+
+### Extended Portability
+- **PORT-01**: Copilot VSCode extension skill generation (different model from file-based skills)
+- **PORT-02**: Watch mode that auto-reinstalls when `.claude/skills/` changes
+- **PORT-03**: YAML-configurable transformation rules for custom runtimes
+
+## Out of Scope
+
+| Feature | Reason |
+|---------|--------|
+| Copilot skill distribution | VSCode extension model is fundamentally different from file-based skills |
+| YAML-configurable transforms | 4 well-known runtimes have stable conventions; Custom variant handles long tail |
+| Global skill registry/marketplace | Not needed for single-project portability |
+| Bidirectional sync (other -> Claude) | One canonical source (Claude Code), convert outward only |
+
+## Traceability
+
+| Requirement | Phase | Status |
+|-------------|-------|--------|
+| PROFILE-01 | Phase 34 | Complete |
+| PROFILE-02 | Phase 34 | Complete |
+| PROFILE-03 | Phase 34 | Complete |
+| PROFILE-04 | Phase 34 | Complete |
+| XFORM-01 | Phase 35 | Complete |
+| XFORM-02 | Phase 35 | Complete |
+| XFORM-03 | Phase 35 | Complete |
+| XFORM-04 | Phase 35 | Complete |
+| XFORM-05 | Phase 35 | Complete |
+| CLI-01 | Phase 36 | Complete |
+| CLI-02 | Phase 36 | Complete |
+| CLI-03 | Phase 36 | Complete |
+| CLI-04 | Phase 36 | Complete |
+| CONFIG-01 | Phase 37 | Complete |
+| CONFIG-02 | Phase 37 | Complete |
+| CONFIG-03 | Phase 37 | Complete |
+| CONFIG-04 | Phase 37 | Complete |
+| DX-01 | Phase 38 | Complete |
+| DX-02 | Phase 38 | Complete |
+| DX-03 | Phase 38 | Complete |
+| DX-04 | Phase 38 | Complete |
+
+**Coverage:**
+- v2.3.0 requirements: 21 total
+- Mapped to phases: 21
+- Unmapped: 0 ✓
+- Complete: 21 (Phases 34-38)
+- Pending: 0 ✓
+
+---
+*Requirements defined: 2026-03-16*
+*Last updated: 2026-03-17 after roadmap creation*
diff --git a/.planning/milestones/v2.3.0-ROADMAP.md b/.planning/milestones/v2.3.0-ROADMAP.md
new file mode 100644
index 00000000..2ebe7287
--- /dev/null
+++ b/.planning/milestones/v2.3.0-ROADMAP.md
@@ -0,0 +1,135 @@
+# RuleZ Roadmap
+
+**Current Focus:** v2.3.0 Multi-Runtime Skill Portability — Phase 37 next
+
+---
+
+## Milestones
+
+- ✅ **v1.2 P2 Features** — Phases 1-3 (shipped 2026-02-07) — [Archive](milestones/v1.2-ROADMAP.md)
+- ✅ **v1.3 Advanced Matching & Validation** — Phases 4-6 (shipped 2026-02-10) — [Archive](milestones/v1.3-ROADMAP.md)
+- ✅ **v1.4 Stability & Polish** — Phases 7-10 (shipped 2026-02-10) — [Archive](milestones/v1.4-ROADMAP.md)
+- ✅ **v1.6 RuleZ UI** — Phases 11-17 (shipped 2026-02-12) — [Archive](milestones/v1.6-ROADMAP.md)
+- ✅ **v1.7 Multi-Platform Hook Support** — Phases 18-21 (shipped 2026-02-13) — [Archive](milestones/v1.7-ROADMAP.md)
+- ✅ **v1.8 Tool Name Canonicalization** — Phase 22 (shipped 2026-02-22) — [Archive](milestones/v1.8-ROADMAP.md)
+- ✅ **v1.9 Multi-CLI E2E Testing** — Phases 23, 25 (shipped 2026-03-05) — [Archive](milestones/v1.9-ROADMAP.md)
+- ✅ **v2.0 RuleZ Cleanup and Hardening** — Phase 28 (shipped 2026-03-05) — [Archive](milestones/v2.0-ROADMAP.md)
+- ✅ **v2.1 Multi-CLI E2E Testing (continued)** — Phases 24, 26, 27 (shipped 2026-03-09) — [Archive](milestones/v2.1-ROADMAP.md)
+- ✅ **v2.2.0 Subagent Hooks, DX, Performance & Enterprise** — Phases 29-36 (shipped 2026-03-11) — [Archive](milestones/v2.2.0-ROADMAP.md)
+- ✅ **v2.2.1 Cleanup, Sync Skills, CLI Help & UI Integration** — Phase 29 (shipped 2026-03-13) — [Archive](milestones/v2.2.1-ROADMAP.md)
+- ✅ **v2.2.2 Documentation Audit & Multi-CLI Guides** — Phases 30-33 (shipped 2026-03-17) — [Archive](milestones/v2.2.2-ROADMAP.md)
+- 🚧 **v2.3.0 Multi-Runtime Skill Portability** — Phases 34-38 (in progress)
+
+---
+
+### 🚧 v2.3.0 Multi-Runtime Skill Portability (In Progress)
+
+**Milestone Goal:** Build an installer-based conversion pipeline that transforms canonical Claude Code skills into runtime-specific installations. Author once in `.claude/`, convert at install time, run everywhere.
+
+## Phases
+
+- [x] **Phase 34: Runtime Profiles and Skill Discovery** - Data model and discovery layer for all supported runtimes
+- [x] **Phase 35: Transformation Engine** - Content transformation pipeline with 6 transform types
+- [x] **Phase 36: CLI Integration and File Writer** - `rulez skills install` and `rulez skills clean` with file writer
+- [x] **Phase 37: Config File Generation and Mastering-Hooks** - Auto-generate GEMINI.md/AGENTS.md skill registries and handle mastering-hooks
+- [x] **Phase 38: Status, Diff, Sync, and DX Polish** - Complete `rulez skills` subcommand family with status/diff/sync and colorized output
+
+## Phase Details
+
+### Phase 34: Runtime Profiles and Skill Discovery
+**Goal**: Users can describe any supported runtime and discover all skills from canonical `.claude/` sources
+**Depends on**: Nothing (foundation phase)
+**Requirements**: PROFILE-01, PROFILE-02, PROFILE-03, PROFILE-04
+**Status**: Complete (2026-03-16)
+**Success Criteria** (what must be TRUE):
+  1. A `Runtime` enum covers Claude, OpenCode, Gemini, Codex, and Custom variants
+  2. Each runtime profile correctly resolves its skills dir, commands dir, command separator, tool name style, and path prefix
+  3. Skill discovery scans `.claude/skills/` and `.claude/commands/` and returns a manifest of all skills and commands
+  4. Extra skill sources outside `.claude/` (e.g., mastering-hooks at repo root) are discovered automatically
+  5. Custom runtime support works with a `--dir` flag pointing to any generic skill target
+**Plans**: TBD
+
+### Phase 35: Transformation Engine
+**Goal**: Skill content is correctly transformed from Claude Code conventions to each target runtime's conventions
+**Depends on**: Phase 34
+**Requirements**: XFORM-01, XFORM-02, XFORM-03, XFORM-04, XFORM-05
+**Status**: Complete (2026-03-16)
+**Success Criteria** (what must be TRUE):
+  1. Tool names in skill content are rewritten from PascalCase to runtime convention (lowercase for OpenCode, snake_case for Gemini)
+  2. Path references (`~/.claude/`) are rewritten to the target runtime equivalent
+  3. Command filenames are flattened from dot-separated to hyphen-separated with all cross-references updated
+  4. YAML frontmatter is converted (allowed-tools to tools format, color fields handled, unsupported fields stripped)
+  5. MCP tools are excluded for Gemini and preserved for OpenCode/Codex
+**Plans**: TBD
+
+### Phase 36: CLI Integration and File Writer
+**Goal**: Users can install transformed skills to any target runtime using `rulez skills install` and remove them with `rulez skills clean`
+**Depends on**: Phase 35
+**Requirements**: CLI-01, CLI-02, CLI-03, CLI-04
+**Status**: Complete (2026-03-16)
+**Success Criteria** (what must be TRUE):
+  1. `rulez skills install --runtime <rt>` writes transformed skills to the target runtime directory
+  2. `rulez skills install --dry-run` prints a preview of what would be installed without writing any files
+  3. `rulez skills clean --runtime <rt>` removes generated skill files for the specified runtime
+  4. The writer uses clean-install semantics (removes existing target directory before writing fresh)
+**Plans**: TBD
+
+### Phase 37: Config File Generation and Mastering-Hooks
+**Goal**: Installing skills to Gemini or Codex automatically updates the runtime config file with a skill registry, and mastering-hooks installs correctly from its non-standard location
+**Depends on**: Phase 36
+**Requirements**: CONFIG-01, CONFIG-02, CONFIG-03, CONFIG-04
+**Success Criteria** (what must be TRUE):
+  1. After `rulez skills install --runtime gemini`, `GEMINI.md` contains an updated skill registry section bounded by `<!-- RULEZ_SKILLS_START -->` / `<!-- RULEZ_SKILLS_END -->` markers
+  2. After `rulez skills install --runtime codex`, `AGENTS.md` is generated (or updated) with a skill registry section listing all installed skills
+  3. Non-skill content in GEMINI.md and AGENTS.md is preserved unchanged across repeated installs
+  4. `rulez skills install` discovers and installs mastering-hooks from the repo root with context-aware platform reference rewriting
+**Plans**: TBD
+
+Plans:
+- [ ] 37-01: Config file generation (GEMINI.md and AGENTS.md marker-based update)
+- [ ] 37-02: Mastering-hooks special handling and platform reference rewriting
+
+### Phase 38: Status, Diff, Sync, and DX Polish
+**Goal**: Users can inspect installation state, preview changes, and sync all runtimes in one command with a polished colorized CLI experience
+**Depends on**: Phase 37
+**Requirements**: DX-01, DX-02, DX-03, DX-04
+**Success Criteria** (what must be TRUE):
+  1. `rulez skills status` shows a table with each runtime, installation state, and human-readable relative timestamps (e.g., "2 hours ago") indicating freshness
+  2. `rulez skills diff --runtime <rt>` shows a colored diff of what would change if skills were re-installed now
+  3. `rulez skills sync` installs to all detected runtimes in one command and reports per-runtime progress
+  4. All install/sync operations emit colorized output with progress indicators showing which files are being written
+**Plans**: TBD
+
+Plans:
+- [ ] 38-01: `rulez skills status` with freshness comparison
+- [ ] 38-02: `rulez skills diff` with colored output
+- [ ] 38-03: `rulez skills sync` and DX polish (colorized output, progress indicators)
+
+---
+
+## Progress
+
+| Phase | Milestone | Plans Complete | Status | Completed |
+|-------|-----------|----------------|--------|-----------|
+| 1-3 | v1.2 | 6/6 | Complete | 2026-02-07 |
+| 4-6 | v1.3 | 10/10 | Complete | 2026-02-10 |
+| 7-10 | v1.4 | 9/9 | Complete | 2026-02-10 |
+| 11-17 | v1.6 | 19/19 | Complete | 2026-02-12 |
+| 18-21 | v1.7 | 15/15 | Complete | 2026-02-13 |
+| 22 | v1.8 | 2/2 | Complete | 2026-02-22 |
+| 23, 25 | v1.9 | 5/5 | Complete | 2026-03-05 |
+| 28 | v2.0 | 8/8 | Complete | 2026-03-05 |
+| 24, 26, 27 | v2.1 | 4/4 | Complete | 2026-03-09 |
+| 29 | v2.2.1 | 2/2 | Complete | 2026-03-13 |
+| 30-33 | v2.2.2 | 8/8 | Complete | 2026-03-17 |
+| 34 | v2.3.0 | TBD | Complete | 2026-03-16 |
+| 35 | v2.3.0 | TBD | Complete | 2026-03-16 |
+| 36 | v2.3.0 | TBD | Complete | 2026-03-16 |
+| 37. Config File Generation and Mastering-Hooks | v2.3.0 | 0/2 | Not started | - |
+| 38. Status, Diff, Sync, and DX Polish | v2.3.0 | 0/3 | Not started | - |
+
+**Total:** 38 phases across 13 milestones. 83 plans complete (v2.3.0 plans TBD).
+
+---
+
+*Created 2026-02-06 — Updated 2026-03-17 after v2.3.0 roadmap created.*
diff --git a/.planning/todos/pending/2026-03-18-add-colorized-terminal-output-to-rulez-skills-cli.md b/.planning/todos/pending/2026-03-18-add-colorized-terminal-output-to-rulez-skills-cli.md
new file mode 100644
index 00000000..30cf79f2
--- /dev/null
+++ b/.planning/todos/pending/2026-03-18-add-colorized-terminal-output-to-rulez-skills-cli.md
@@ -0,0 +1,30 @@
+---
+created: 2026-03-18T05:01:11.076Z
+title: Add colorized terminal output to rulez skills CLI
+area: cli
+files:
+  - rulez/src/cli/skills.rs
+  - rulez/Cargo.toml
+---
+
+## Problem
+
+`rulez skills` CLI (install, clean, sync, status, diff) uses plain `println!()` throughout with no color or progress indicators. Requirement DX-04 from v2.3.0 (Multi-Runtime Skill Portability) was left unimplemented — shipped as tech debt.
+
+Specific gaps found during v2.3.0 milestone audit:
+- `diff()` outputs `"  M ..."` / `"  + ..."` as plain ASCII — DX-02 requires colored diff (M=yellow, +=green)
+- `status()` outputs a plain text table — installed rows should be green, missing/stale rows red
+- `install()` and `sync()` emit a single `println!` after completion — no live progress during multi-file writes
+- No color library in `Cargo.toml` (checked: `indicatif`, `console`, `termcolor`, `owo-colors`, `yansi` — none present)
+
+## Solution
+
+Add `owo-colors` (zero-cost, no_std compatible) or `console` to `rulez/Cargo.toml`.
+
+In `rulez/src/cli/skills.rs`:
+- `diff()`: color `M` prefix yellow, `+` prefix green, `-` prefix red
+- `status()`: color installed runtime rows green, not-installed rows dimmed/red, stale rows yellow
+- `install()`: print per-file progress as files are written (e.g., `  writing skill.md → ~/.config/opencode/skills/skill.md`)
+- `sync()`: show per-runtime header as each runtime is processed
+
+Keep changes self-contained to `skills.rs` and `Cargo.toml`. No architectural changes needed.
diff --git a/.planning/todos/pending/2026-03-18-add-context-aware-mastering-hooks-transform-for-gemini-runtime.md b/.planning/todos/pending/2026-03-18-add-context-aware-mastering-hooks-transform-for-gemini-runtime.md
new file mode 100644
index 00000000..ee6c337c
--- /dev/null
+++ b/.planning/todos/pending/2026-03-18-add-context-aware-mastering-hooks-transform-for-gemini-runtime.md
@@ -0,0 +1,32 @@
+---
+created: 2026-03-18T05:01:11.076Z
+title: Add context-aware mastering-hooks transform for Gemini runtime
+area: cli
+files:
+  - rulez/src/skills/transform.rs
+  - rulez/src/skills/transforms/
+  - rulez/src/cli/skills.rs:200-212
+---
+
+## Problem
+
+Requirement CONFIG-04 from v2.3.0 (Multi-Runtime Skill Portability) is only partially implemented. The mastering-hooks skill is discovered and installed but passes through the **same generic `TransformPipeline`** as all other skills — no special handling exists.
+
+`mastering-hooks` describes Claude Code-specific hook integration (hooks.yaml, rule evaluation, PreToolUse/PostToolUse events). When installed for Gemini, the generic `PathRefTransform` rewrites `.claude/` → `.gemini/` mechanically, but the conceptual content (hook mechanisms, rule matching) has no Gemini equivalent. The result is a misleading Gemini skill that references Claude Code concepts verbatim.
+
+Specific gap found during v2.3.0 milestone audit:
+- `discover_inventory()` in `cli/skills.rs:200-212` adds mastering-hooks as an extra skill ✓
+- No downstream code in `transform.rs` or any `transforms/` file checks `skill.name == "mastering-hooks"` ✗
+- CONFIG-04 requirement clause "context-aware handling" is unimplemented
+
+## Solution
+
+In `rulez/src/skills/transform.rs` (or a new `transforms/mastering_hooks.rs`), add a `MasteringHooksTransform` that fires only when `skill.source_path` contains `mastering-hooks`:
+
+- For `Runtime::Gemini`: either (a) skip install entirely with a clear warning ("mastering-hooks is Claude Code-specific, skipping for Gemini"), or (b) inject a preamble note explaining the skill describes Claude Code hooks and may not apply
+- For `Runtime::OpenCode` / `Runtime::Codex`: same consideration — hooks model differs
+- For `Runtime::Claude`: pass through unchanged (canonical source)
+
+Option (a) is simpler and more honest. Option (b) is better UX if users want a reference copy.
+
+Wire into `TransformPipeline::for_runtime()` so it runs before the generic path-ref transform.
diff --git a/.planning/v2.3.0-MILESTONE-AUDIT.md b/.planning/v2.3.0-MILESTONE-AUDIT.md
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@@ -0,0 +1,182 @@
+---
+milestone: v2.3.0
+name: Multi-Runtime Skill Portability
+audited: 2026-03-17
+status: gaps_found
+scores:
+  requirements: 19/21
+  phases: 0/5
+  integration: 19/21
+  flows: 3/5
+gaps:
+  requirements:
+    - id: "CONFIG-04"
+      status: "partial"
+      phase: "Phase 37"
+      claimed_by_plans: []
+      completed_by_plans: []
+      verification_status: "missing"
+      evidence: "mastering-hooks is discovered and installed via the generic TransformPipeline — no context-aware branching exists in any transform (transform.rs, transforms/path_refs.rs, transforms/frontmatter.rs) that identifies skill.name == mastering-hooks and applies special handling. Generic PathRefTransform rewrites .claude/ -> .gemini/ but cannot know that mastering-hooks describes Claude Code-specific hook mechanisms that have no Gemini equivalent."
+    - id: "DX-04"
+      status: "unsatisfied"
+      phase: "Phase 38"
+      claimed_by_plans: []
+      completed_by_plans: []
+      verification_status: "missing"
+      evidence: "rulez/src/cli/skills.rs uses only plain println!() calls throughout. No ANSI escape sequences, no color library dependency (indicatif, console, termcolor, owo-colors, yansi — none present in Cargo.toml). diff() outputs '  M ...' and '  + ...' as plain ASCII. status() outputs a plain text table. All progress feedback is a single println! after completion, not a live progress indicator."
+  integration:
+    - "Phase 34→35 wiring: SkillInventory (actual name) passed to TransformPipeline — works correctly. Note: spec calls it SkillManifest but implementation uses SkillInventory (naming mismatch, not a code gap)."
+    - "CONFIG-04 wiring: mastering-hooks flows through generic pipeline with no skill-name-aware branching"
+    - "DX-04 wiring: no color crate, no ANSI in any skills CLI output path"
+  flows:
+    - "rulez skills install --runtime gemini: breaks at mastering-hooks transform step (CONFIG-04)"
+    - "rulez skills diff: output is plain text, DX-02/DX-04 color requirement unmet"
+tech_debt:
+  - phase: "34-38 (all v2.3.0 phases)"
+    items:
+      - "No GSD phase artifacts (PLAN.md, SUMMARY.md, VERIFICATION.md) for any of the 5 phases — implemented directly in release branch outside gsd:execute-phase workflow"
+      - "No VALIDATION.md (Nyquist) files for phases 34-38"
+      - "SkillManifest name used in Phase 34 spec; implementation uses SkillInventory — spec-to-code naming mismatch"
+      - "XFORM-05 MCP exclusion is an inline conditional inside ToolNameTransform, not a standalone McpExclusionTransform struct as implied by '6 transform types' framing"
+nyquist:
+  compliant_phases: []
+  partial_phases: []
+  missing_phases: [34, 35, 36, 37, 38]
+  overall: "MISSING — no VALIDATION.md files for any v2.3.0 phase"
+---
+
+# Milestone Audit: v2.3.0 Multi-Runtime Skill Portability
+
+**Audited:** 2026-03-17
+**Status:** ⚠ gaps_found
+**Overall Score:** 19/21 requirements satisfied, 2 gaps (1 unsatisfied, 1 partial)
+
+---
+
+## Requirements Coverage (3-Source Cross-Reference)
+
+> **Note on source availability:** Phases 34-38 were implemented directly in the `release/v2.3.0` branch outside the `gsd:execute-phase` workflow. No PLAN.md, SUMMARY.md, or VERIFICATION.md files exist for any v2.3.0 phase. The third source (integration checker code analysis) substitutes for the missing VERIFICATION.md evidence.
+
+| Requirement | Phase | REQUIREMENTS.md | VERIFICATION.md | Integration Checker | Final Status |
+|-------------|-------|-----------------|-----------------|---------------------|--------------|
+| PROFILE-01 | 34 | `[x]` | missing | WIRED | **partial** (no verification artifact) |
+| PROFILE-02 | 34 | `[x]` | missing | WIRED | **partial** |
+| PROFILE-03 | 34 | `[x]` | missing | WIRED | **partial** |
+| PROFILE-04 | 34 | `[x]` | missing | WIRED | **partial** |
+| XFORM-01 | 35 | `[x]` | missing | WIRED | **partial** |
+| XFORM-02 | 35 | `[x]` | missing | WIRED | **partial** |
+| XFORM-03 | 35 | `[x]` | missing | WIRED | **partial** |
+| XFORM-04 | 35 | `[x]` | missing | WIRED | **partial** |
+| XFORM-05 | 35 | `[x]` | missing | WIRED (inline) | **partial** |
+| CLI-01 | 36 | `[x]` | missing | WIRED | **partial** |
+| CLI-02 | 36 | `[x]` | missing | WIRED | **partial** |
+| CLI-03 | 36 | `[x]` | missing | WIRED | **partial** |
+| CLI-04 | 36 | `[x]` | missing | WIRED | **partial** |
+| CONFIG-01 | 37 | `[x]` | missing | WIRED | **partial** |
+| CONFIG-02 | 37 | `[x]` | missing | WIRED | **partial** |
+| CONFIG-03 | 37 | `[x]` | missing | WIRED | **partial** |
+| CONFIG-04 | 37 | `[x]` | missing | PARTIAL — no context-aware mastering-hooks handling | **partial (gap)** |
+| DX-01 | 38 | `[x]` | missing | WIRED | **partial** |
+| DX-02 | 38 | `[x]` | missing | PARTIAL — no color output | **partial (gap)** |
+| DX-03 | 38 | `[x]` | missing | WIRED | **partial** |
+| DX-04 | 38 | `[x]` | missing | UNWIRED — no color library, plain println only | **unsatisfied** |
+
+**Satisfied (code confirmed, no artifact):** PROFILE-01/02/03/04, XFORM-01/02/03/04/05, CLI-01/02/03/04, CONFIG-01/02/03, DX-01/03 — 17 requirements
+**Partial (implementation gap):** CONFIG-04, DX-02 — 2 requirements
+**Unsatisfied (not implemented):** DX-04 — 1 requirement
+
+---
+
+## Phase Verification Summary
+
+| Phase | Goal | SUMMARY.md | VERIFICATION.md | VALIDATION.md | Status |
+|-------|------|-----------|-----------------|---------------|--------|
+| 34: Runtime Profiles | Runtime enum, SkillInventory discovery | MISSING | MISSING | MISSING | ⚠ unverified |
+| 35: Transformation Engine | 6 transform types, pipeline | MISSING | MISSING | MISSING | ⚠ unverified |
+| 36: CLI Integration | install/clean subcommands, writer | MISSING | MISSING | MISSING | ⚠ unverified |
+| 37: Config File Generation | GEMINI.md/AGENTS.md marker update | MISSING | MISSING | MISSING | ⚠ unverified |
+| 38: Status, Diff, Sync, DX | status/diff/sync, colorized output | MISSING | MISSING | MISSING | ⚠ unverified |
+
+**Root cause:** All 5 phases were implemented in `release/v2.3.0` branch without going through `gsd:execute-phase`. No GSD workflow artifacts were created.
+
+---
+
+## Integration Findings
+
+### Connected (19/21 requirements wired)
+
+- Phase 34→35: `SkillInventory` → `TransformPipeline::for_runtime()` → transform content ✓
+- Phase 35→36: `TransformPipeline` used by `writer::write_skills()` ✓
+- Phase 36→37: `install()` calls `config_gen::update_config_file()` after write ✓
+- Phase 37→38: `status()`, `diff()`, `sync()` all call `discover_inventory()` and use writer ✓
+- All 5 `rulez skills` subcommands registered in `main.rs` and dispatched ✓
+
+### Gaps
+
+**CONFIG-04 — mastering-hooks context-aware handling (partial)**
+- `discover_inventory()` in `cli/skills.rs:200-212` correctly discovers `mastering-hooks/` as an extra skill
+- But no downstream code in any transform checks `skill.name == "mastering-hooks"` for special handling
+- Generic `PathRefTransform` rewrites `.claude/` → `.gemini/` but cannot contextualize Claude-specific hook concepts
+- The "context-aware handling" clause in CONFIG-04 is not implemented
+
+**DX-04 — Colorized terminal output (unsatisfied)**
+- `cli/skills.rs` uses only plain `println!()` throughout
+- No color library in `Cargo.toml` (`indicatif`, `console`, `termcolor`, `owo-colors` — none present)
+- `diff()` outputs `"  M ..."` / `"  + ..."` as plain ASCII — DX-02 colored diff also unmet
+- `status()` outputs plain text table with no color coding
+- No live progress indicators — single `println!` after completion only
+
+---
+
+## E2E Flow Verification
+
+| Flow | Steps | Status | Break Point |
+|------|-------|--------|-------------|
+| `rulez skills install --runtime opencode` | discover → transform → write | ✅ complete | — |
+| `rulez skills install --runtime gemini` | discover → transform → write → update GEMINI.md | ⚠ partial | mastering-hooks generic transform |
+| `rulez skills install --runtime codex` | discover → transform → write → generate AGENTS.md | ✅ complete | — |
+| `rulez skills diff --runtime <rt>` | discover → compare → colored output | ⚠ partial | no color output |
+| `rulez skills sync` | detect runtimes → install each | ✅ complete | — |
+
+---
+
+## Nyquist Compliance
+
+**Status: MISSING for all 5 phases**
+
+No `VALIDATION.md` files exist for phases 34-38. Nyquist validation was not run during execution (phases bypassed `gsd:execute-phase` workflow).
+
+| Phase | VALIDATION.md | Action |
+|-------|---------------|--------|
+| 34 | missing | `/gsd:validate-phase 34` |
+| 35 | missing | `/gsd:validate-phase 35` |
+| 36 | missing | `/gsd:validate-phase 36` |
+| 37 | missing | `/gsd:validate-phase 37` |
+| 38 | missing | `/gsd:validate-phase 38` |
+
+---
+
+## Tech Debt
+
+**Phase 34-38 (all v2.3.0 phases)**
+- No GSD phase artifacts (PLAN.md, SUMMARY.md, VERIFICATION.md) for any of the 5 phases — implemented directly in release branch outside `gsd:execute-phase` workflow
+- No VALIDATION.md (Nyquist) files for phases 34-38
+- `SkillManifest` used in Phase 34 spec; implementation uses `SkillInventory` — spec-to-code naming mismatch
+- `XFORM-05` MCP exclusion is an inline conditional inside `ToolNameTransform`, not a standalone `McpExclusionTransform` struct as implied by "6 transform types" framing
+
+---
+
+## Audit Summary
+
+**19/21 requirements have confirmed implementations** (via integration checker code analysis).
+
+**2 genuine gaps:**
+1. **CONFIG-04** (partial): mastering-hooks installs but without context-aware transform — goes through generic pipeline
+2. **DX-04** (unsatisfied): No colorized output anywhere in `rulez skills` — no color crate, plain `println!` only
+
+**CI evidence:** PR #116 — 9/9 checks passed (Release + Full Validation). The code compiles and the functional tests pass. The gaps are UX/polish (color) and a nuanced behavior requirement (mastering-hooks context-awareness).
+
+---
+
+*Audit performed: 2026-03-17*
+*Auditor: gsd:audit-milestone workflow + gsd-integration-checker subagent*