claude-code-hook-development

What problem does it solve?

Claude Code hook development provides a structured approach to creating, configuring, and governing guards and automations that run on specific events, ensuring consistent policy enforcement across tool usage.

Core Features & Use Cases

• Hook Types: Command hooks (bash/script execution) and Prompt hooks (LLM-driven decisions) to cover a wide range of automation and governance needs.
• Exit Codes & Behavior: Clear exit code conventions (0 = allow, 2 = block) for reliable enforcement and predictable Claude responses.
• Settings & File Layout: Standard locations (.claude/settings.json and .claude/hooks/) for configuration and hook scripts, enabling deterministic deployment.
• Hook Events & Matchers: Supports PreToolUse, PostToolUse, PermissionRequest, UserPromptSubmit, Stop, SessionStart, and other events with a flexible matcher system.
• Usage Scenarios: Enforce security policies, block dangerous commands, automate routine checks, and insert guardrails during development workflows.
• Activation & References: Activation relies on documented references and examples to implement common policies and patterns.

Quick Start

Create a basic hook by placing a script under .claude/hooks/ and registering it in .claude/settings.json, then consult the References for sample patterns and activation steps.