Three-Checkpoint CI Contract to Validate AI-Generated Code Patches

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As AI agents make code patch generation increasingly cheap, the bottleneck has shifted to human review time, which has not scaled down proportionally. A proposed three-checkpoint CI contract aims to make patch validation machine-checkable before any human reviews a diff. The three checkpoints cover property delta, fixture delta, and flake freeze, each designed to verify that existing invariants hold, output changes are intentional, and new failures are not intermittent. The gate runs as a shell script on every agent-proposed patch, returning specific exit codes that direct engineers to reject, freeze, or approve a merge candidate. The framework is model-agnostic and applies equally whether a patch originates from an AI agent, a local model, or a human teammate.

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