fix(marketplace): correct stale hook references and migration guide errors

- claude-config-audit-settings.md: update hook inventory to post-Decision #29 state
- maintainer.md: remove PostToolUse references, update to current hook types
- settings-optimization.md: update review layer table and hooks.json format
- claude-config-optimize-settings.md: fix stale doc-guardian PostToolUse reference
- project-hygiene/claude-md-integration.md: rewrite for manual /hygiene check
- doc-guardian: update doc-sync.md and sync-workflow.md hook references
- MIGRATION-v9.md: mark deleted commands as Removed, not renamed
- projman/task-sizing.md: PostToolUse → PreToolUse in example
- scripts/setup.sh: /labels-sync → /labels sync
- docs/CONFIGURATION.md: doc-guardian "Commands and hooks" → "Commands only"
- docs/prompts/INDEX.md: add prompt execution index

Version: 9.0.1

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/claude-config-maintainer/agents/maintainer.md

@@ -96,7 +96,7 @@ Use this mapping to identify active plugins:
 | `gitea` | projman |
 | `netbox` | cmdb-assistant |
 
-Also check for hook-based plugins (project-hygiene uses `PostToolUse` hooks).
+Also check for hook-based plugins (code-sentinel, git-flow, cmdb-assistant use `PreToolUse` safety hooks; clarity-assist uses `UserPromptSubmit` quality hook).
 
 **Step 2: Check CLAUDE.md for Plugin References**
 
@@ -151,7 +151,7 @@ Evaluate using `skills/settings-optimization.md`:
 Before recommending auto-allow patterns, verify active review layers:
 
 1. Read `plugins/*/hooks/hooks.json` for each installed plugin
-2. Map hook types (PreToolUse, PostToolUse) to tool matchers (Write, Edit, Bash)
+2. Map hook types (PreToolUse, UserPromptSubmit) to tool matchers (Write, Edit, MultiEdit, Bash, MCP patterns)
 3. Confirm plugins are listed in `.claude-plugin/marketplace.json`
 4. Only recommend auto-allow for scopes covered by ≥2 verified review layers