diff --git a/src/lib/lint-fixes.test.ts b/src/lib/lint-fixes.test.ts
index e1785dd03..66c81e2a5 100644
--- a/src/lib/lint-fixes.test.ts
+++ b/src/lib/lint-fixes.test.ts
@@ -12,6 +12,7 @@ import {
   appendWikilink,
   ensureBrokenLinkStub,
   rewriteWikilinkTarget,
+  stubPageType,
   stubRelativePathFromBrokenTarget,
 } from "./lint-fixes"
 
@@ -91,4 +92,62 @@ describe("ensureBrokenLinkStub", () => {
   it("keeps explicit wiki subdirectories when building stub paths", () => {
     expect(stubRelativePathFromBrokenTarget("concepts/Foo Bar")).toBe("concepts/foo-bar.md")
   })
+
+  it("writes the folder-derived type into a knowledge-folder stub", async () => {
+    fsMocks.fileExists.mockResolvedValue(false)
+
+    await ensureBrokenLinkStub("/project", "concepts/Foo Bar")
+
+    expect(fsMocks.writeFile).toHaveBeenCalledWith(
+      "/project/wiki/concepts/foo-bar.md",
+      expect.stringContaining("type: concept"),
+    )
+  })
+
+  it("writes the folder-derived type for entities stubs", async () => {
+    fsMocks.fileExists.mockResolvedValue(false)
+
+    await ensureBrokenLinkStub("/project", "entities/Foo Bar")
+
+    expect(fsMocks.writeFile).toHaveBeenCalledWith(
+      "/project/wiki/entities/foo-bar.md",
+      expect.stringContaining("type: entity"),
+    )
+  })
+
+  it("keeps type: query for single-segment stubs under queries/", async () => {
+    fsMocks.fileExists.mockResolvedValue(false)
+
+    await ensureBrokenLinkStub("/project", "Foo Bar")
+
+    expect(fsMocks.writeFile).toHaveBeenCalledWith(
+      "/project/wiki/queries/foo-bar.md",
+      expect.stringContaining("type: query"),
+    )
+  })
+
+  it("uses the folder name as type for unrecognized directories", async () => {
+    fsMocks.fileExists.mockResolvedValue(false)
+
+    await ensureBrokenLinkStub("/project", "standards/Foo Bar")
+
+    expect(fsMocks.writeFile).toHaveBeenCalledWith(
+      "/project/wiki/standards/foo-bar.md",
+      expect.stringContaining("type: standards"),
+    )
+  })
+})
+
+describe("stubPageType", () => {
+  it("derives the type from a known knowledge folder", () => {
+    expect(stubPageType("concepts/foo-bar.md")).toBe("concept")
+  })
+
+  it("keeps query for single-segment stubs under queries/", () => {
+    expect(stubPageType("queries/foo-bar.md")).toBe("query")
+  })
+
+  it("falls back to the folder name for unrecognized directories", () => {
+    expect(stubPageType("standards/foo-bar.md")).toBe("standards")
+  })
 })
diff --git a/src/lib/lint-fixes.ts b/src/lib/lint-fixes.ts
index f10228d61..8f6887169 100644
--- a/src/lib/lint-fixes.ts
+++ b/src/lib/lint-fixes.ts
@@ -1,6 +1,7 @@
 import { createDirectory, fileExists, writeFile } from "@/commands/fs"
 import { getFileName, normalizePath } from "@/lib/path-utils"
 import { makeQuerySlug } from "@/lib/wiki-filename"
+import { inferWikiTypeFromPath } from "@/lib/wiki-page-types"
 
 export function lintLinkTarget(target: string): string {
   return normalizePath(target)
@@ -65,6 +66,14 @@ function stubTitleFromBrokenTarget(brokenTarget: string): string {
     .trim() || "Missing Page"
 }
 
+/** Derive the stub's frontmatter type from its destination folder so pages
+ *  written into knowledge folders stay visible in the graph and pass schema
+ *  routing. Only single-segment targets land in `queries/`, where `query`
+ *  remains correct. */
+export function stubPageType(relativePath: string): string {
+  return inferWikiTypeFromPath(`wiki/${relativePath}`) ?? "query"
+}
+
 export async function ensureBrokenLinkStub(
   projectPath: string,
   brokenTarget: string,
@@ -81,7 +90,7 @@ export async function ensureBrokenLinkStub(
   const date = new Date().toISOString().slice(0, 10)
   const content = [
     "---",
-    "type: query",
+    `type: ${stubPageType(relativePath)}`,
     `title: "${title.replace(/"/g, '\\"')}"`,
     `created: ${date}`,
     `updated: ${date}`,
diff --git a/src/lib/sweep-reviews-build-wiki-index.test.ts b/src/lib/sweep-reviews-build-wiki-index.test.ts
index c6adcbe60..1c5c6dc85 100644
--- a/src/lib/sweep-reviews-build-wiki-index.test.ts
+++ b/src/lib/sweep-reviews-build-wiki-index.test.ts
@@ -26,6 +26,10 @@ async function loadBuildWikiIndex() {
   return mod.buildWikiIndex
 }
 
+async function loadSweepModule() {
+  return import("./sweep-reviews")
+}
+
 function mdFile(name: string): FileNode {
   return { name, path: `/project/wiki/${name}`, is_dir: false }
 }
@@ -41,6 +45,7 @@ describe("buildWikiIndex", () => {
     const index = await buildWikiIndex("/project")
 
     expect(index.byTitle.has("attention mechanism")).toBe(false)
+    expect(index.byTitleSlug.has("attention-mechanism")).toBe(false)
     expect(index.pages[0].title).toBeNull()
   })
 
@@ -53,4 +58,36 @@ describe("buildWikiIndex", () => {
 
     expect(index.byTitle.has("real title")).toBe(true)
   })
+
+  it("indexes the frontmatter title's slug for timestamped filenames", async () => {
+    const buildWikiIndex = await loadBuildWikiIndex()
+    mockListDirectory.mockResolvedValue([mdFile("clash-detection-2026-09-06-143052.md")])
+    mockReadFile.mockResolvedValue("---\ntitle: Clash Detection\n---\n# Clash Detection\n")
+
+    const index = await buildWikiIndex("/project")
+
+    expect(index.byTitleSlug.has("clash-detection")).toBe(true)
+  })
+})
+
+describe("pageExists", () => {
+  it("resolves a candidate name against a timestamped page via its title slug", async () => {
+    const { buildWikiIndex, pageExists } = await loadSweepModule()
+    mockListDirectory.mockResolvedValue([mdFile("clash-detection-2026-09-06-143052.md")])
+    mockReadFile.mockResolvedValue("---\ntitle: Clash Detection\n---\n# Clash Detection\n")
+
+    const index = await buildWikiIndex("/project")
+
+    expect(pageExists("clash-detection", index)).toBe(true)
+  })
+
+  it("does not match unrelated candidate names via the slug index", async () => {
+    const { buildWikiIndex, pageExists } = await loadSweepModule()
+    mockListDirectory.mockResolvedValue([mdFile("clash-detection-2026-09-06-143052.md")])
+    mockReadFile.mockResolvedValue("---\ntitle: Clash Detection\n---\n# Clash Detection\n")
+
+    const index = await buildWikiIndex("/project")
+
+    expect(pageExists("completely-unrelated", index)).toBe(false)
+  })
 })
diff --git a/src/lib/sweep-reviews.ts b/src/lib/sweep-reviews.ts
index 4279504e8..d5c4c12e4 100644
--- a/src/lib/sweep-reviews.ts
+++ b/src/lib/sweep-reviews.ts
@@ -18,6 +18,7 @@ import { streamChat } from "@/lib/llm-client"
 import type { FileNode } from "@/types/wiki"
 import { normalizePath } from "@/lib/path-utils"
 import { normalizeReviewTitle } from "@/lib/review-utils"
+import { makeQuerySlug } from "@/lib/wiki-filename"
 import { hasUsableLlm } from "@/lib/has-usable-llm"
 import { getTaskLlmConfig } from "@/lib/llm-task-routing"
 import { parseFrontmatter } from "@/lib/frontmatter"
@@ -32,6 +33,7 @@ interface WikiPageSummary {
 interface WikiIndex {
   byId: Set<string>
   byTitle: Set<string>
+  byTitleSlug: Set<string>
   pages: WikiPageSummary[]
 }
 
@@ -54,6 +56,7 @@ export async function buildWikiIndex(projectPath: string): Promise<WikiIndex> {
   const pp = normalizePath(projectPath)
   const byId = new Set<string>()
   const byTitle = new Set<string>()
+  const byTitleSlug = new Set<string>()
   const pages: WikiPageSummary[] = []
 
   try {
@@ -71,6 +74,14 @@ export async function buildWikiIndex(projectPath: string): Promise<WikiIndex> {
         if (typeof fmTitle === "string" && fmTitle.trim()) {
           title = fmTitle.trim()
           byTitle.add(title.toLowerCase())
+          // Timestamped filenames ("clash-detection-2026-09-06-143052") can
+          // never match a candidate's bare name, so also index the title's
+          // slug. Skip titles with no letters/digits: makeQuerySlug falls
+          // back to "query" for those, which would let unrelated garbage
+          // candidates collide with every such page.
+          if (/[\p{L}\p{N}]/u.test(title)) {
+            byTitleSlug.add(makeQuerySlug(title))
+          }
         }
       } catch {
         // skip unreadable files
@@ -82,7 +93,7 @@ export async function buildWikiIndex(projectPath: string): Promise<WikiIndex> {
     // no wiki directory yet
   }
 
-  return { byId, byTitle, pages }
+  return { byId, byTitle, byTitleSlug, pages }
 }
 
 /**
@@ -108,8 +119,12 @@ function extractCandidateNames(item: ReviewItem): string[] {
   return Array.from(names)
 }
 
-/** Check if a candidate name matches an existing wiki page */
-function pageExists(name: string, index: WikiIndex): boolean {
+/**
+ * Check if a candidate name matches an existing wiki page.
+ *
+ * @internal Exported for unit tests only.
+ */
+export function pageExists(name: string, index: WikiIndex): boolean {
   const normalized = name.trim().toLowerCase()
   if (!normalized) return false
 
@@ -120,6 +135,11 @@ function pageExists(name: string, index: WikiIndex): boolean {
   // Exact title match (from frontmatter)
   if (index.byTitle.has(normalized)) return true
 
+  // Slug of the frontmatter title — catches pages whose filename carries a
+  // timestamp suffix ("clash-detection-2026-09-06-143052") so a candidate
+  // named after the missing page still resolves.
+  if (index.byTitleSlug.has(makeQuerySlug(normalized))) return true
+
   return false
 }