Individual skill
module-regression
Govern cross-module regression in large repositories with a REGRESSION.md ledger that records each module's downstream consumers and executable acceptance command. After a change, run the changed module and every affected downstream command, and use observed exit codes as regression evidence under the project's delivery policy. Use for module regression, regression ledgers, impact audits, downstream verification, and changes where modifying A may break B.
skills/module-regression/SKILL.md
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- Last checked
- Nov 3, 2026
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- License
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# Module Regression Ledger
## When to Activate
- The repository has at least three interdependent modules, or a previous change to A has broken B.
- A change modifies a module's externally observable behavior and must prove both that module and downstream consumers still work.
- The project already has executable tests or reconciliation commands that should be organized by dependency.
## Anti-Patterns
- Creating a regression ledger for a small repository with no cross-module dependencies.
- Guessing dependencies manually or treating one scan as permanent truth.
- Replacing executable acceptance-command exit codes with model review.
