docs(agents): refresh AGENTS.md hierarchy via /init-deep

Updated root + 14 core subdirectory AGENTS.md files to reflect current
state (commit 2892ca4a on dev). Added 4 new AGENTS.md files for gap
directories: hooks/comment-checker (AI slop blocker), features/claude-
code-plugin-loader (CC compat layer), features/claude-code-mcp-loader
(tier 2 MCP loader), cli/doctor (health diagnostics with 25 check files).

src/hooks/AGENTS.md

@@ -1,6 +1,6 @@
 # src/hooks/ — 52 Lifecycle Hooks
 
-**Generated:** 2026-04-11
+**Generated:** 2026-04-18
 
 ## OVERVIEW
 

src/hooks/atlas/AGENTS.md

@@ -1,6 +1,6 @@
 # src/hooks/atlas/ — Master Boulder Orchestrator
 
-**Generated:** 2026-04-11
+**Generated:** 2026-04-18
 
 ## OVERVIEW
 

src/hooks/claude-code-hooks/AGENTS.md

@@ -1,6 +1,6 @@
 # src/hooks/claude-code-hooks/ — Claude Code Compatibility
 
-**Generated:** 2026-04-11
+**Generated:** 2026-04-18
 
 ## OVERVIEW
 

src/hooks/comment-checker/AGENTS.md

@@ -0,0 +1,62 @@
+# src/hooks/comment-checker/ — AI Slop Comment Blocker
+
+**Generated:** 2026-04-18
+
+## OVERVIEW
+
+Tool Guard tier hook. Runs after `write`/`edit` tools to detect AI-generated comment patterns in code and block them before they land. Backed by `@code-yeongyu/comment-checker` binary (trusted dependency).
+
+## WHAT IT BLOCKS
+
+AI slop comment smells:
+- Restating what code literally does (`// increment counter`)
+- Filler phrases (`// obviously`, `// clearly`, `// simply`)
+- Decorative separators without purpose
+- JSDoc on trivially-named functions
+- `// TODO:` without context
+- Comments contradicting surrounding code
+
+See `@code-yeongyu/comment-checker` for the authoritative blocklist.
+
+## EXECUTION FLOW
+
+```
+tool.execute.after (write | edit | hashline edit)
+  → extract changed lines from tool output
+  → spawn comment-checker binary with changed file path
+  → parse findings (line ranges + violation category)
+  → if findings → inject tool-level error → agent must fix
+```
+
+## KEY FILES
+
+| File | Purpose |
+|------|---------|
+| `hook.ts` | `createCommentCheckerHook()` — main factory, tool.execute.after handler |
+| `comment-checker-runner.ts` | Spawn binary, parse JSON output |
+| `changed-line-extractor.ts` | Extract which lines changed from tool result |
+| `findings-formatter.ts` | Format violations as actionable error message |
+| `binary-resolver.ts` | Locate `comment-checker` binary (node_modules + PATH) |
+
+## CONFIG
+
+```jsonc
+// oh-my-opencode.jsonc
+{
+  "comment_checker": {
+    "enabled": true,      // default: true
+    "severity": "error"   // error blocks, warning notifies only
+  }
+}
+```
+
+Disable via `"disabled_hooks": ["comment-checker"]`.
+
+## BYPASS FOR LEGITIMATE COMMENTS
+
+Prefix with `// @allow` or mark file scope with `// comment-checker-disable-file` at top. Use sparingly — defeating the purpose.
+
+## RELATED
+
+- Doctor check: `src/cli/doctor/checks/tools.ts` verifies `comment-checker` binary availability
+- Postinstall: `postinstall.mjs` downloads binary if missing