Claude Code Secret Gate — AI skill for Claude Code

claude-code-secret-gate 🔒

**Your AI coding agent commits fast and often. This is the mechanical gate that stops it from committing secrets — before they become permanent history.**

Built for Claude Code and any AI-agent workflow; works in any plain git repo too. One shell script, zero dependencies. It scans what's *staged* (the exact content about to enter git) and blocks the commit if it finds:

• 🔑 Secret-shaped strings inside file content: JWTs, private key blocks, AWS keys, GitHub/Slack/OpenAI/Stripe-style tokens, GoHighLevel PITs
• 📄 Credential-looking filenames: .env, .pem, id_rsa, credentials*.json…

Why content scanning matters

`.gitignore` only blocks files you *expected* to be secret. The leaks that actually happen are tokens pasted into a config export, an API response saved as JSON, a workflow backup with an embedded key. Filename rules never catch those — **content scanning does**. This gate caught three real leaks in its first day of use (workflow exports with embedded live tokens that every filename rule missed).

Install (once per repo)

cp gate.sh .git/hooks/pre-commit
chmod +x .git/hooks/pre-commit

Done. Every `git commit` now runs the gate automatically:

✅ secret-gate: staged content clean.        ← commit proceeds
🚨 SECRET-GATE: secret-shaped strings...     ← commit BLOCKED, nothing recorded

Or run it manually

git add -A
./gate.sh          # ✅ or 🚨
git commit -m "..."

Working with AI coding agents?

Paste this into your agent's instructions:

Between `git add` and `git commit`, ALWAYS run `./gate.sh`. If it fails, ABORT the commit, unstage the flagged files, fix `.gitignore`, and rescan. Never use `--no-verify`.

An AI agent commits fast and often — exactly why it needs a mechanical gate, not a promise to be careful.

Extend it

Patterns live in one variable (`PATTERNS`) — add your platform's token shapes. Keep the rule: **when the gate and your convenience disagree,