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Tutorial: Shell Script Gate to Screen AI-Generated Code Before Merging

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A developer tutorial published on DEV Community proposes enforcing a deterministic review gate for AI-generated code before it can be merged into a repository. The gate is implemented as a small POSIX shell script that checks whether a patch exceeds configurable file and line-count limits, touches sensitive paths such as infrastructure or migration files, or contains structural errors flagged by Git. The script answers three specific questions about patch size, path ownership, and diff integrity, but does not replace tests, security scans, or human review. It can be integrated into GitHub Actions workflows by fetching full repository history and calling the same script against the pull request's base branch. The author validated the approach on macOS with Git 2.50.1, confirming that safe patches pass and sensitive-path patches are correctly rejected with a non-zero exit status.

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