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open-coder-ai/scan-secrets

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Blocks credentials: vendor tokens (AWS, GitHub, GitLab, Slack, OpenAI, HF, ...), JWTs, private-key and PGP blocks, named key/token/secret/password values (JSON, YAML, env, HCL, code), URI creds, Authorization literals, CLI password flags; files by path (.env*, keys). Misses: split or encoded values, quoted values with spaces, unlisted names, reference- or placeholder-like values. Runs: commit, agent write, turn end. Pragma same line; agent: only if in HEAD; MCP gateway: never. [Session-enforced at the turn's end by a Stop hook; needs git and a Python 3.11+. This client records no file-writing tool vocabulary, so the write itself is not judged: what the turn actually left on disk is re-read, and a construct a rule denies is refused then, however it was written. With no working Python the hook exits 2; without git, fail-open clients allow silently. A gate that cannot reach a decision refuses rather than allowing one it never judged. Enforcement at every commit and in CI still needs chock installed in the repo. Enforces only in a client that reads the com.github.copilot namespace and tells the hook where the package lives; a client that exports no plugin-root variable (VS Code's agent-plugin format exports none) runs the hook, which then exits 0 and checks nothing; a root that is set but lacks the bundled hook exits 2 and refuses the call.]