What broke
Unrelated failures looked like one large incident.
Eleven checks failed across different parts of the stack, obscuring which change belonged to which contract.
DentSignal repair · CI recovery
Eleven red checks were not one bug.
The recovery separated formatting, handler wiring, browser rules, security scans, dependencies, and frontend test doubles by cause.
What changed
Each gate received one cause and one narrow correction.
Failures were classified, repaired in the lane that caught them, and rerun before the whole pipeline was treated as one result.
What it fixed
The pipeline returned to green without a blanket patch.
Review could connect each edit to a failed contract without weakening security or silently changing unrelated behavior.
Before / after
Repair each failed contract separately.
Broken
patch_all(failed_gates)
run_integrated_pipeline()Fixed
for gate in failed_gates:
cause = classify(gate.output)
repair(cause.contract)
rerun(gate)Evidence
Each red gate got its own cause and repair.
The historical record separates backend, frontend, security, and supply-chain failures instead of hiding them behind one blanket change. The case study preserves that mapping; it does not claim the repository is permanently green.
Stack and capabilities
Mixed-stack failure classification and recovery.
- Python
- TypeScript
- Browser tests
- Static analysis
- Secret scans
- Dependency checks
- CI/CD
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