diff --git a/CHANGELOG.md b/CHANGELOG.md
index 290f5859..d5cbb553 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ All notable changes to PBrain will be documented in this file.
 
 ## [Unreleased]
 
+- **`pbrain doctor` is quiet when there's nothing to fix.** Three more false-positive classes eliminated: (1) the `skill_symlinks` check no longer dumps "shadowed by other plugins: claude:..., cursor:..., windsurf:..." for all 78 entries when your installed symlinks happen to point at a sibling PBrain checkout (e.g. `~/.pbrain-repo` while you're running doctor from a dev clone) — a new `ours-elsewhere` state detects any pbrain tree via `package.json.name === 'pbrain'` and the message now reads `installed — claude: 26, cursor: 26, windsurf: 26 (symlinks resolve to sibling checkout at <path>)`. (2) The `resolver_health` MECE overlap between `maintain` and `citation-fixer` on the trigger `"citation audit"` is gone — removed from `maintain` since `citation-fixer` is the specialized skill for that phrase. (3) Seven skills (`ingest`, `enrich`, `setup`, `signal-detector`, `idea-ingest`, `media-ingest`, `meeting-ingestion`) now reference `skills/conventions/quality.md` alongside their local citation / Iron-Law recap, silencing the DRY-violation warnings while keeping the inline guidance readable. Doctor's health score on a fresh install now reflects only real, user-actionable issues.
 - **`pbrain doctor` no longer cries wolf on PGLite or on project/repo pairs that share a name.** The `DUPLICATE_SLUG` check was firing every time you onboarded a project whose repo name matches its product name — `projects/pbrain` + `repos/joedanz/pbrain` always collide on the tail "pbrain," even when every wikilink in the brain is path-qualified and there's no real ambiguity. It now fires only when a bare-slug `[[tail]]` wikilink actually references the ambiguous tail, and the message points at the exact page referencing it so you can fix it in one edit. Separately, the `pgvector` and `rls` checks stop reporting "Could not check ..." for PGLite users — pgvector is bundled with the PGLite WASM runtime and RLS is meaningless for a local embedded DB, so both now report green with an explanatory message. Your doctor health score now reflects real problems, not check-runner noise.
 - **`project-onboard` accepts the product name and domain as positional arguments in any order, and infers the repo from your current directory.** Call it with `project-onboard <name> <domain>` from inside a repo and that's all you need — no repo URL, no keyword wrapping. Args are classified by shape, not position: anything with a slash is the repo, anything with a TLD is the domain, everything else is the display name. The project slug resolves in priority order — explicit display name wins, then domain root, then `package.json`, then the repo name with suffixes like `-web` / `-app` / `-monorepo` stripped — so a repo called `<name>-web` still gets filed under `projects/<name>`. Use `project=<value>` as a named escape hatch when a display name itself looks like a domain.
 - **Onboard a coding project once, and every future Claude Code session in that project already knows it.** The `project-onboard` skill now installs a short `## pbrain` declaration into the project's own `CLAUDE.md` at the end of its run — slug, brain-query guidance, and the `pbrain remember` recipe. Every subsequent session in that project auto-recognizes it and routes brain lookups to the right slug; the skill's new Phase 0 idempotency gate short-circuits in ~5ms so re-invocation is a free no-op. No machine-wide hook, no `~/.claude/settings.json` edit, no manually-written `.pbrain-project` marker — just one gesture per project, ever. Delete the `## pbrain` section to stop tracking. Per-project opt-in keeps client checkouts and scratch clones out of your brain by default.
diff --git a/skills/enrich/SKILL.md b/skills/enrich/SKILL.md
index 3850f3e5..182a6685 100644
--- a/skills/enrich/SKILL.md
+++ b/skills/enrich/SKILL.md
@@ -36,6 +36,7 @@ This skill guarantees:
 - No stubs: every new page has meaningful content from web search or existing brain context
 
 > **Filing rule:** Read `skills/_brain-filing-rules.md` before creating any new page.
+> **Quality rules:** See `skills/conventions/quality.md` for the canonical citation format, back-link (Iron Law), and notability-gate rules. The sections below are a local recap; the convention file is the source of truth.
 
 ## Iron Law: Back-Linking (MANDATORY)
 
diff --git a/skills/idea-ingest/SKILL.md b/skills/idea-ingest/SKILL.md
index 45c9e567..29b2359e 100644
--- a/skills/idea-ingest/SKILL.md
+++ b/skills/idea-ingest/SKILL.md
@@ -25,6 +25,7 @@ mutating: true
 # Idea Ingest Skill
 
 > **Filing rule:** Read `skills/_brain-filing-rules.md` before creating any new page.
+> **Quality rules:** See `skills/conventions/quality.md` for the canonical citation format, back-link (Iron Law), and notability-gate rules. The sections below are a local recap; the convention file is the source of truth.
 
 ## Contract
 
diff --git a/skills/ingest/SKILL.md b/skills/ingest/SKILL.md
index 5ea96bc4..e9b99f62 100644
--- a/skills/ingest/SKILL.md
+++ b/skills/ingest/SKILL.md
@@ -20,6 +20,7 @@ mutating: true
 Ingest meetings, articles, media, documents, and conversations into the brain.
 
 > **Filing rule:** Read `skills/_brain-filing-rules.md` before creating any new page.
+> **Quality rules:** See `skills/conventions/quality.md` for the canonical citation format, back-link (Iron Law), and notability-gate rules. The sections below are a local recap; the convention file is the source of truth.
 
 ## Contract
 
diff --git a/skills/maintain/SKILL.md b/skills/maintain/SKILL.md
index 0913900c..340d1328 100644
--- a/skills/maintain/SKILL.md
+++ b/skills/maintain/SKILL.md
@@ -8,7 +8,6 @@ description: |
 triggers:
   - "brain health"
   - "check backlinks"
-  - "citation audit"
   - "maintenance"
   - "orphan pages"
   - "stale pages"
diff --git a/skills/media-ingest/SKILL.md b/skills/media-ingest/SKILL.md
index e79822ba..60aead51 100644
--- a/skills/media-ingest/SKILL.md
+++ b/skills/media-ingest/SKILL.md
@@ -29,6 +29,7 @@ mutating: true
 Ingest video, audio, PDF, book, screenshot, and GitHub repo content into the brain.
 
 > **Filing rule:** Read `skills/_brain-filing-rules.md` before creating any new page.
+> **Quality rules:** See `skills/conventions/quality.md` for the canonical citation format, back-link (Iron Law), and notability-gate rules. The sections below are a local recap; the convention file is the source of truth.
 
 ## Contract
 
diff --git a/skills/meeting-ingestion/SKILL.md b/skills/meeting-ingestion/SKILL.md
index a0d98784..ce8d9109 100644
--- a/skills/meeting-ingestion/SKILL.md
+++ b/skills/meeting-ingestion/SKILL.md
@@ -23,6 +23,7 @@ mutating: true
 # Meeting Ingestion Skill
 
 > **Filing rule:** Read `skills/_brain-filing-rules.md` before creating any new page.
+> **Quality rules:** See `skills/conventions/quality.md` for the canonical citation format, back-link (Iron Law), and notability-gate rules. The sections below are a local recap; the convention file is the source of truth.
 
 ## Contract
 
diff --git a/skills/setup/SKILL.md b/skills/setup/SKILL.md
index 0cc7a157..c8dcc3c1 100644
--- a/skills/setup/SKILL.md
+++ b/skills/setup/SKILL.md
@@ -223,8 +223,8 @@ Inject the key patterns into the agent's system context or AGENTS.md:
 
 1. **Brain-agent loop** (Section 2): read before responding, write after learning
 2. **Entity detection** (Section 3): spawn on every message, capture people/companies/ideas
-3. **Source attribution** (Section 7): every fact needs `[Source: ...]`
-4. **Iron law back-linking** (Section 15.4): every mention links back to the entity page
+3. **Source attribution** (Section 7): every fact needs `[Source: ...]` — see `skills/conventions/quality.md` for the canonical format
+4. **Iron law back-linking** (Section 15.4): every mention links back to the entity page — see `skills/conventions/quality.md`
 
 Tell the user: "The production agent guide is at docs/PBRAIN_SKILLPACK.md. It covers
 the brain-agent loop, entity detection, enrichment, meeting ingestion, and cron
diff --git a/skills/signal-detector/SKILL.md b/skills/signal-detector/SKILL.md
index 56c36a30..ef2ea90e 100644
--- a/skills/signal-detector/SKILL.md
+++ b/skills/signal-detector/SKILL.md
@@ -41,6 +41,8 @@ This skill guarantees:
 
 ## Iron Law: Back-Linking (MANDATORY)
 
+> **Quality rules:** See `skills/conventions/quality.md` for the canonical citation format and back-link rules. The steps below are the local procedure; the convention file is the source of truth.
+
 Every time this skill creates or updates a brain page that mentions a person or company:
 1. Check if that person/company has a brain page
 2. If yes → add a back-link FROM their page TO the page you just created/updated
diff --git a/src/commands/doctor.ts b/src/commands/doctor.ts
index de00ec32..4bd8a7f0 100644
--- a/src/commands/doctor.ts
+++ b/src/commands/doctor.ts
@@ -225,6 +225,29 @@ export async function runDoctor(engine: BrainEngine | null, args: string[]) {
 // Helpers
 // ---------------------------------------------------------------------------
 
+/**
+ * Walk up from a resolved symlink target looking for the repo root
+ * (directory with package.json name=pbrain). Used to collapse per-skill
+ * `resolvedTo` paths to the single checkout directory for the status message.
+ */
+function resolveCheckoutRoot(resolvedPath: string): string {
+  if (!resolvedPath) return '';
+  let dir = resolvedPath;
+  for (let i = 0; i < 12; i++) {
+    const pkgPath = join(dir, 'package.json');
+    if (existsSync(pkgPath)) {
+      try {
+        const pkg = JSON.parse(readFileSync(pkgPath, 'utf-8'));
+        if (pkg && pkg.name === 'pbrain') return dir;
+      } catch { /* keep walking */ }
+    }
+    const parent = join(dir, '..');
+    if (parent === dir) break;
+    dir = parent;
+  }
+  return '';
+}
+
 /** Find the PBrain repo root by walking up from cwd looking for skills/RESOLVER.md */
 function findRepoRoot(): string | null {
   let dir = process.cwd();
@@ -300,12 +323,25 @@ function checkSkillSymlinks(repoRoot: string): Check {
     const shadowed: string[] = [];
     const partial: string[] = [];
 
+    // `ours-elsewhere` (symlink to another pbrain checkout, e.g. ~/.pbrain-repo
+    // when doctor runs from a dev clone) counts as installed — the skills fire
+    // correctly, the symlinks just don't point at this particular tree.
+    const elsewhereByTarget = new Map<string, string[]>();
     for (const t of targets) {
-      const present = new Set(entries.filter(e => e.target.dir === t.dir && e.state === 'ours-ok').map(e => e.name));
+      const present = new Set(entries.filter(e => e.target.dir === t.dir && (e.state === 'ours-ok' || e.state === 'ours-elsewhere')).map(e => e.name));
       const targetBroken = entries.filter(e => e.target.dir === t.dir && e.state === 'ours-broken');
       const targetShadowed = entries.filter(e => e.target.dir === t.dir && (e.state === 'foreign-symlink' || e.state === 'foreign-file' || e.state === 'foreign-dir') && skillNames.has(e.name));
+      const targetElsewhere = entries.filter(e => e.target.dir === t.dir && e.state === 'ours-elsewhere');
       for (const e of targetBroken) broken.push(`${t.client}:${e.name}`);
       for (const e of targetShadowed) shadowed.push(`${t.client}:${e.name}`);
+      if (targetElsewhere.length > 0) {
+        const checkouts = [...new Set(targetElsewhere.map(e => resolveCheckoutRoot(e.resolvedTo || '')).filter(Boolean))];
+        for (const root of checkouts) {
+          const list = elsewhereByTarget.get(root) || [];
+          list.push(`${t.client} ${targetElsewhere.length}`);
+          elsewhereByTarget.set(root, list);
+        }
+      }
       if (present.size > 0 && present.size < skills.length) {
         partial.push(`${t.client} ${present.size}/${skills.length}`);
       }
@@ -316,7 +352,7 @@ function checkSkillSymlinks(repoRoot: string): Check {
       const installedByClient = targets
         .map(t => ({
           client: t.client,
-          count: entries.filter(e => e.target.dir === t.dir && e.state === 'ours-ok').length,
+          count: entries.filter(e => e.target.dir === t.dir && (e.state === 'ours-ok' || e.state === 'ours-elsewhere')).length,
         }))
         .filter(x => x.count > 0);
       if (installedByClient.length === 0) {
@@ -327,10 +363,13 @@ function checkSkillSymlinks(repoRoot: string): Check {
         };
       }
       const summary = installedByClient.map(x => `${x.client}: ${x.count}`).join(', ');
+      const elsewhereNote = elsewhereByTarget.size > 0
+        ? ` (symlinks resolve to sibling checkout at ${[...elsewhereByTarget.keys()].join(', ')})`
+        : '';
       return {
         name: 'skill_symlinks',
         status: 'ok',
-        message: `installed — ${summary}`,
+        message: `installed — ${summary}${elsewhereNote}`,
       };
     }
 
diff --git a/src/core/skill-installer.ts b/src/core/skill-installer.ts
index e2716933..32d1c791 100644
--- a/src/core/skill-installer.ts
+++ b/src/core/skill-installer.ts
@@ -268,11 +268,42 @@ export interface StatusEntry {
   /** Skill name at that dir. */
   name: string;
   dst: string;
-  state: 'ours-ok' | 'ours-broken' | 'foreign-symlink' | 'foreign-file' | 'foreign-dir';
+  /**
+   * - `ours-ok`: symlink resolves into the current repo root.
+   * - `ours-broken`: symlink was clearly ours but now dangles.
+   * - `ours-elsewhere`: symlink resolves into a *different* PBrain checkout
+   *   (e.g., `~/.pbrain-repo` when doctor is run from a dev clone). Still a
+   *   valid install — just not pointing at this tree.
+   * - `foreign-*`: a real other-plugin file / symlink / directory.
+   */
+  state: 'ours-ok' | 'ours-broken' | 'ours-elsewhere' | 'foreign-symlink' | 'foreign-file' | 'foreign-dir';
   /** Where the symlink points (resolved). */
   resolvedTo?: string;
 }
 
+/**
+ * Walk up from `pathInside` looking for a `package.json` whose `name` field
+ * is `pbrain`. Used to classify symlinks that land in a different PBrain
+ * checkout (e.g. the global `~/.pbrain-repo` install) as `ours-elsewhere`
+ * rather than `foreign-symlink` — they're valid installs, just not this tree.
+ */
+function isPbrainCheckout(pathInside: string): boolean {
+  let dir = pathInside;
+  for (let i = 0; i < 12; i++) {
+    const pkgPath = join(dir, 'package.json');
+    if (existsSync(pkgPath)) {
+      try {
+        const pkg = JSON.parse(readFileSync(pkgPath, 'utf-8'));
+        if (pkg && pkg.name === 'pbrain') return true;
+      } catch { /* malformed — keep walking */ }
+    }
+    const parent = dirname(dir);
+    if (parent === dir) break;
+    dir = parent;
+  }
+  return false;
+}
+
 /**
  * Inspect every entry under each target dir and classify it. Used by
  * `install-skills status` and by the doctor check.
@@ -321,6 +352,8 @@ export function scanTargets(targets: Target[], repoRoot: string): StatusEntry[]
       }
       if (rootList.some(r => pathInsideRoot(resolved!, r))) {
         entries.push({ target, name, dst, state: 'ours-ok', resolvedTo: resolved });
+      } else if (isPbrainCheckout(resolved!)) {
+        entries.push({ target, name, dst, state: 'ours-elsewhere', resolvedTo: resolved });
       } else {
         entries.push({ target, name, dst, state: 'foreign-symlink', resolvedTo: resolved });
       }
diff --git a/test/install-skills.test.ts b/test/install-skills.test.ts
index 7ca52f94..87b4e3e1 100644
--- a/test/install-skills.test.ts
+++ b/test/install-skills.test.ts
@@ -239,6 +239,46 @@ describe('scanTargets', () => {
     const entries = scanTargets([{ client: 'claude', dir: targetDir }], repoRoot);
     expect(entries[0].state).toBe('ours-broken');
   });
+
+  test('symlink into a sibling pbrain checkout is classified as ours-elsewhere', () => {
+    // Two pbrain checkouts: repoRoot (where doctor is running) and siblingRoot
+    // (where the installed symlinks actually point — e.g. ~/.pbrain-repo).
+    const repoRoot = join(scratchDir, 'dev-clone');
+    const siblingRoot = join(scratchDir, 'sibling-pbrain');
+    mkdirSync(join(repoRoot, 'skills', 'foo'), { recursive: true });
+    writeFileSync(join(repoRoot, 'skills', 'foo', 'SKILL.md'), '---\nname: foo\n---');
+    writeFileSync(join(repoRoot, 'package.json'), JSON.stringify({ name: 'pbrain' }));
+    mkdirSync(join(siblingRoot, 'skills', 'foo'), { recursive: true });
+    const siblingSkill = join(siblingRoot, 'skills', 'foo', 'SKILL.md');
+    writeFileSync(siblingSkill, '---\nname: foo\n---');
+    writeFileSync(join(siblingRoot, 'package.json'), JSON.stringify({ name: 'pbrain' }));
+
+    const targetDir = join(scratchDir, 'client2', 'skills');
+    mkdirSync(targetDir, { recursive: true });
+    symlinkSync(siblingSkill, join(targetDir, 'foo'));
+
+    const entries = scanTargets([{ client: 'claude', dir: targetDir }], repoRoot);
+    expect(entries[0].state).toBe('ours-elsewhere');
+    expect(entries[0].resolvedTo).toContain('sibling-pbrain');
+  });
+
+  test('symlink into a non-pbrain foreign project stays foreign-symlink', () => {
+    const repoRoot = join(scratchDir, 'r1');
+    mkdirSync(repoRoot, { recursive: true });
+    writeFileSync(join(repoRoot, 'package.json'), JSON.stringify({ name: 'pbrain' }));
+    const foreignRoot = join(scratchDir, 'not-pbrain');
+    mkdirSync(join(foreignRoot, 'skills', 'foo'), { recursive: true });
+    const foreignSkill = join(foreignRoot, 'skills', 'foo', 'SKILL.md');
+    writeFileSync(foreignSkill, 'x');
+    writeFileSync(join(foreignRoot, 'package.json'), JSON.stringify({ name: 'something-else' }));
+
+    const targetDir = join(scratchDir, 'client3', 'skills');
+    mkdirSync(targetDir, { recursive: true });
+    symlinkSync(foreignSkill, join(targetDir, 'foo'));
+
+    const entries = scanTargets([{ client: 'claude', dir: targetDir }], repoRoot);
+    expect(entries[0].state).toBe('foreign-symlink');
+  });
 });
 
 describe('detectClients', () => {