Hook Developer

This is the complete technical reference for Claude Code's hook system. If you're writing hooks, you need this. It documents all 11 hook types with exact input/output JSON schemas, explains which hooks can block execution versus just inject context, and covers registration patterns in settings.json. The critical details are here: PostToolUse uses tool_response not tool_result, Stop hooks require checking stop_hook_active to avoid infinite loops, and SessionStart can persist environment variables through CLAUDE_ENV_FILE. It's organized as a quick reference table plus detailed schemas for each hook type. Bookmark this if you're doing any serious hook development, it'll save you from guessing at field names.

Install to Claude Code

npx -y skills add parcadei/continuous-claude-v3 --skill hook-developer --agent claude-code