Claude Code Hooks: Safety, Automation & Notification Scripts
This open-source repository provides ready-to-drop-in JavaScript hooks for Claude Code that run before or after AI tool executions — blocking dangerous shell commands, protecting secret files, auto-staging git changes, and sending Slack alerts when Claude needs input. Each hook is tested (262 passing tests), MIT-licensed, and designed to be copied, pasted, and customized in minutes. It solves a real gap: giving developers guardrails and automation on top of Claude Code's agentic actions without building from scratch.
MISSION OBJECTIVES
- 01Clone the repo and copy block-dangerous-commands.js and protect-secrets.js into ~/.claude/hooks/ using the two-line bash commands from the Quick Start section.
- 02Add the PreToolUse configuration block to your .claude/settings.json, setting SAFETY_LEVEL to 'high' for the recommended balance of flexibility and protection.
- 03Run event-logger.py against your own project to inspect the exact payload Claude Code sends for each hook event, then use that data to write a custom hook tailored to your codebase within 30 minutes.
CODE INTELLIGENCE
// .claude/settings.json
{
"hooks": {
"PreToolUse": [
{
"matcher": "Bash",
"hooks": [
{
"type": "command",
"command": "node ~/.claude/hooks/block-dangerous-commands.js"
}
]
}
]
}
}
// In hook script:
const SAFETY_LEVEL = 'strict'; // or 'critical', 'high'FIELD OPERATIONS
Compliance Audit Hook for Regulated Industries
Build a PreToolUse hook that scans every file Claude attempts to read or edit against a list of PII patterns (SSNs, credit card numbers, HIPAA fields) and logs violations to a centralized audit trail — giving compliance teams a real-time record of what the AI touched.
Team Notification Dashboard for Multi-Developer Claude Sessions
Extend the notify-permission hook to post structured Slack messages (file name, operation type, requester) into a shared channel, then pipe those events into a lightweight dashboard so engineering managers can see what Claude Code is doing across the team in real time.
STRATEGIC APPLICATIONS
- →A software agency using Claude Code for client projects can activate the protect-secrets hook to prevent the AI from ever reading .env files or exfiltrating API keys — turning it into a mandatory safety layer before handing junior developers unsupervised AI access.
- →A DevOps team can combine block-dangerous-commands at 'strict' level with the auto-stage hook so Claude Code can never run force pushes or destructive git operations, while automatically staging every approved edit for human review before any commit lands.