YeonGyu-Kim
96 lines
5.9 KiB
Markdown
96 lines
5.9 KiB
Markdown
# HOOKS KNOWLEDGE BASE
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## OVERVIEW
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41 lifecycle hooks intercepting/modifying agent behavior across 7 event types. Three-tier registration: Core (32) → Continuation (7) → Skill (2).
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## STRUCTURE
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```
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hooks/
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├── agent-usage-reminder/ # Specialized agent hints (109 lines)
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├── anthropic-context-window-limit-recovery/ # Auto-summarize on limit (2232 lines, 29 files)
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├── anthropic-effort/ # Effort=max for Opus max variant (56 lines)
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├── atlas/ # Main orchestration hook (1976 lines, 17 files)
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├── auto-slash-command/ # Detects /command patterns (1134 lines)
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├── auto-update-checker/ # Plugin update check (1140 lines, 20 files)
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├── background-notification/ # OS notifications (33 lines)
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├── category-skill-reminder/ # Category+skill delegation reminders (597 lines)
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├── claude-code-hooks/ # settings.json compat (2110 lines) — see AGENTS.md
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├── comment-checker/ # Prevents AI slop comments (710 lines)
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├── compaction-context-injector/ # Injects context on compaction (128 lines)
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├── compaction-todo-preserver/ # Preserves todos during compaction (203 lines)
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├── context-window-monitor.ts # Reminds of headroom at 70% (100 lines)
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├── delegate-task-retry/ # Retries failed delegations (266 lines)
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├── directory-agents-injector/ # Auto-injects AGENTS.md (195 lines)
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├── directory-readme-injector/ # Auto-injects README.md (190 lines)
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├── edit-error-recovery/ # Recovers from edit failures (188 lines)
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├── empty-task-response-detector.ts # Detects empty responses (27 lines)
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├── interactive-bash-session/ # Tmux session management (695 lines)
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├── keyword-detector/ # ultrawork/search/analyze modes (1665 lines)
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├── non-interactive-env/ # Non-TTY handling (483 lines)
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├── preemptive-compaction.ts # Auto-compact at 78% usage (108 lines)
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├── prometheus-md-only/ # Planner read-only mode (955 lines)
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├── question-label-truncator/ # Truncates labels to 30 chars (199 lines)
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├── ralph-loop/ # Self-referential dev loop (1687 lines)
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├── rules-injector/ # Conditional .sisyphus/rules injection (1604 lines)
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├── session-notification.ts # OS idle notifications (108 lines)
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├── session-recovery/ # Auto-recovers from crashes (1279 lines, 14 files)
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├── sisyphus-junior-notepad/ # Junior notepad directive (76 lines)
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├── start-work/ # Sisyphus work session starter (648 lines)
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├── stop-continuation-guard/ # Guards stop continuation (214 lines)
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├── subagent-question-blocker/ # Blocks subagent questions (112 lines)
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├── task-reminder/ # Task progress reminders (210 lines)
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├── task-resume-info/ # Resume info for cancelled tasks (39 lines)
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├── tasks-todowrite-disabler/ # Disables TodoWrite when tasks active (202 lines)
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├── think-mode/ # Dynamic thinking budget (1365 lines)
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├── thinking-block-validator/ # Validates thinking blocks (169 lines)
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├── todo-continuation-enforcer/ # Force TODO completion — boulder mechanism (2061 lines)
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├── tool-output-truncator.ts # Prevents context bloat (62 lines)
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├── unstable-agent-babysitter/ # Monitors unstable behavior (451 lines)
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└── write-existing-file-guard/ # Guards against file overwrite (356 lines)
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```
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## EVENT TYPES
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| Event | Hook Method | Can Block | Count |
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|-------|-------------|-----------|-------|
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| UserPromptSubmit | `chat.message` | Yes | 4 |
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| ChatParams | `chat.params` | No | 2 |
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| PreToolUse | `tool.execute.before` | Yes | 13 |
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| PostToolUse | `tool.execute.after` | No | 15 |
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| SessionEvent | `event` | No | 17 |
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| MessagesTransform | `experimental.chat.messages.transform` | No | 1 |
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| Compaction | `onSummarize` | No | 2 |
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## BLOCKING HOOKS (8)
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| Hook | Event | Blocks When |
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|------|-------|-------------|
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| auto-slash-command | chat.message | Command execution fails |
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| keyword-detector | chat.message | Keyword injection fails |
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| non-interactive-env | tool.execute.before | Interactive command in non-TTY |
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| prometheus-md-only | tool.execute.before | Write outside .sisyphus/*.md |
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| subagent-question-blocker | tool.execute.before | Question tool in subagent |
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| tasks-todowrite-disabler | tool.execute.before | TodoWrite with task system |
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| write-existing-file-guard | tool.execute.before | Write to existing file |
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| claude-code-hooks | tool.execute.before | Exit code 2 from settings.json hook |
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## EXECUTION ORDER
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**UserPromptSubmit**: keywordDetector → claudeCodeHooks → autoSlashCommand → startWork
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**PreToolUse**: subagentQuestionBlocker → questionLabelTruncator → claudeCodeHooks → nonInteractiveEnv → commentChecker → directoryAgentsInjector → directoryReadmeInjector → rulesInjector → prometheusMdOnly → sisyphusJuniorNotepad → writeExistingFileGuard → tasksToDoWriteDisabler → atlasHook
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**PostToolUse**: claudeCodeHooks → toolOutputTruncator → contextWindowMonitor → commentChecker → directoryAgentsInjector → directoryReadmeInjector → rulesInjector → emptyTaskResponseDetector → agentUsageReminder → interactiveBashSession → editErrorRecovery → delegateTaskRetry → atlasHook → taskResumeInfo → taskReminder
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## HOW TO ADD
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1. Create `src/hooks/name/` with `index.ts` exporting `createMyHook(ctx)`
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2. Add hook name to `HookNameSchema` in `src/config/schema/hooks.ts`
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3. Register in appropriate `src/plugin/hooks/create-*-hooks.ts`
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## ANTI-PATTERNS
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- **Heavy PreToolUse**: Runs before EVERY tool — keep light
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- **Blocking non-critical**: Use PostToolUse warnings instead
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- **Redundant injection**: Track injected files to avoid context bloat
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- **Direct state mutation**: Use `output.output +=` instead of replacing
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