hooks-builder

What problem does it solve?

This Skill provides deterministic control over Claude's behavior at various lifecycle events, eliminating manual interventions and ensuring consistent, automated responses. It saves time by automating validation, formatting, and decision-making processes.

Core Features & Use Cases

• Lifecycle Automation: Configure hooks for 10 agent lifecycle events (e.g., PreToolUse, PostToolUse, PermissionRequest, SessionStart) to automate actions.
• Conditional Execution: Use matchers to filter which tool invocations or session events trigger specific hooks.
• Agent Control: Implement command hooks for deterministic actions (validation, formatting) or prompt hooks for LLM-evaluated decisions.
• Secure Scripting: Write Python 3.14+ hook scripts following strict functional and security-first design principles, ensuring reliable and safe automation.
• Use Case: Implement a PreToolUse hook to automatically validate all Write tool calls against a security policy, blocking any attempts to modify sensitive files without explicit approval.

Quick Start

Use the hooks-builder skill to create a PreToolUse hook that validates tool inputs before execution, blocking any unsafe commands based on predefined patterns.