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Shadow-Compare the Agent Patch. Merge Only Classified Divergences.

A green test run is not a behavior spec. An agent patch can keep every existing assertion passing and still change encodings, error types, empty-input handling, or the bytes written to stdout. Shadow-compare the candidate against a frozen baseline on the same corpus.

  • Shadow-comparison validates agent patch against static baseline on same dataset.
  • Only merge after classifying every divergence into accepted-delta ledger.
  • Ledger records purposeful and rejected differences for minimized manual review.

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