hook-developer
Complete Claude Code hooks reference - input/output schemas, registration, testing patterns
npx skills add parcadei/Continuous-Claude-v3 --skill hook-developer --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Hook Developer Complete reference for developing Claude Code hooks. Use this to write hooks with correct input/output schemas. ## When to Use - Creating a new hook - Debugging hook input/output format - Understanding what fields are available - Setting up hook registration in settings.json - Learning what hooks can block vs inject context ## Quick Reference | Hook | Fires When | Can Block? | Primary Use | |------|-----------|------------|-------------| | **PreToolUse** | Before tool executes | YES | Block/modify tool calls | | **PostToolUse** | After tool completes | Partial | React to tool results | | **UserPromptSubmit** | User sends prompt | YES | Validate/inject context | | **PermissionRequest** | Permission dialog shows | YES | Auto-approve/deny | | **SessionStart** | Session begins | NO | Load context, set env vars | | **SessionEnd** | Session ends | NO | Cleanup/save state | | **Stop** | Agent finishes | YES | Force continuation | | **SubagentStart** | Subagent spawns | NO | Pattern coordination | | **SubagentStop** | Subagent finishes | YES | Force continuation | | **PreCompact** | Before compaction | NO | Save state | | **Notification** | Notification sent | NO | Custom
- When to Use
- Quick Reference
- Hook Input/Output Schemas
- PreToolUse
- PostToolUse
- UserPromptSubmit
- PermissionRequest
- SessionStart
- SessionEnd
- Stop
- SubagentStart
- SubagentStop
- PreCompact
- Notification
set -e
cd "$CLAUDE_PROJECT_DIR/.claude/hooks"
cat | npx tsx src/my-hook.ts
cd "$HOME/.claude/hooks"
cat | node dist/my-hook.mjs
PostToolUse (Write)
echo '{"tool_name":"Write","tool_input":{"file_path":"test.md"},"tool_response":{"success":true},"session_id":"test"}' | \
PreToolUse (Bash)
echo '{"tool_name":"Bash","tool_input":{"command":"ls"},"session_id":"test"}' | \
SessionStartWhat does the hook-developer skill do?
Complete Claude Code hooks reference - input/output schemas, registration, testing patterns
How do I install it?
Run `npx skills add parcadei/Continuous-Claude-v3 --skill hook-developer --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From parcadei/Continuous-Claude-v3, a repository with 3,879 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.