Update AGENTS.md documentation hierarchy with auth and hooks details

- Update root AGENTS.md with timestamp 2026-01-01T21:15:00+09:00, commit 490c0b6
- Add auto-slash-command and ralph-loop hooks to structure documentation
- Add complexity hotspots, unique styles, and notes sections
- Create src/auth/AGENTS.md documenting Antigravity OAuth architecture (57 lines)
- Update src/hooks/AGENTS.md with new hooks documentation

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/auth/AGENTS.md

@@ -0,0 +1,57 @@
+# AUTH KNOWLEDGE BASE
+
+## OVERVIEW
+
+Google Antigravity OAuth implementation for Gemini models. Token management, fetch interception, thinking block extraction, and response transformation.
+
+## STRUCTURE
+
+```
+auth/
+└── antigravity/
+    ├── plugin.ts         # Main plugin export, hooks registration
+    ├── oauth.ts          # OAuth flow, token acquisition
+    ├── token.ts          # Token storage, refresh logic
+    ├── fetch.ts          # Fetch interceptor (622 lines) - URL rewriting, retry
+    ├── response.ts       # Response transformation, streaming
+    ├── thinking.ts       # Thinking block extraction/transformation
+    ├── thought-signature-store.ts  # Signature caching for thinking blocks
+    ├── message-converter.ts        # Message format conversion
+    ├── request.ts        # Request building, headers
+    ├── project.ts        # Project ID management
+    ├── tools.ts          # Tool registration for OAuth
+    ├── constants.ts      # API endpoints, model mappings
+    └── types.ts          # TypeScript interfaces
+```
+
+## KEY COMPONENTS
+
+| File | Purpose |
+|------|---------|
+| `fetch.ts` | Core interceptor - rewrites URLs, manages tokens, handles retries |
+| `thinking.ts` | Extracts `<antThinking>` blocks, transforms for OpenCode compatibility |
+| `response.ts` | Handles streaming responses, SSE parsing |
+| `oauth.ts` | Browser-based OAuth flow for Google accounts |
+| `token.ts` | Token persistence, expiry checking, refresh |
+
+## HOW IT WORKS
+
+1. **Intercept**: `fetch.ts` intercepts requests to Anthropic/Google endpoints
+2. **Rewrite**: URLs rewritten to Antigravity proxy endpoints
+3. **Auth**: Bearer token injected from stored OAuth credentials
+4. **Response**: Streaming responses parsed, thinking blocks extracted
+5. **Transform**: Response format normalized for OpenCode consumption
+
+## ANTI-PATTERNS (AUTH)
+
+- **Direct API calls**: Always go through fetch interceptor
+- **Storing tokens in code**: Use `token.ts` storage layer
+- **Ignoring refresh**: Check token expiry before requests
+- **Blocking on OAuth**: OAuth flow is async, never block main thread
+
+## NOTES
+
+- **Multi-account**: Supports up to 10 Google accounts for load balancing
+- **Fallback**: On rate limit, automatically switches to next available account
+- **Thinking blocks**: Preserved and transformed for extended thinking features
+- **Proxy**: Uses Antigravity proxy for Google AI Studio access

src/hooks/AGENTS.md

@@ -10,6 +10,7 @@ Lifecycle hooks that intercept/modify agent behavior. Inject context, enforce ru
 hooks/
 ├── agent-usage-reminder/       # Remind to use specialized agents
 ├── anthropic-context-window-limit-recovery/     # Auto-compact Claude at token limit
+├── auto-slash-command/         # Auto-detect and execute /command patterns
 ├── auto-update-checker/        # Version update notifications
 ├── background-notification/    # OS notify on background task complete
 ├── claude-code-hooks/          # Claude Code settings.json integration
@@ -24,6 +25,7 @@ hooks/
 ├── keyword-detector/           # Detect ultrawork/search keywords
 ├── non-interactive-env/        # CI/headless environment handling
 ├── preemptive-compaction/      # Pre-emptive session compaction
+├── ralph-loop/                 # Self-referential dev loop until completion
 ├── rules-injector/             # Conditional rules from .claude/rules/
 ├── session-recovery/           # Recover from session errors
 ├── think-mode/                 # Auto-detect thinking triggers