| name | branch-coverage-hotspot-hunter |
| description | Find and prioritize branch-coverage weak spots from Vitest reports, then propose targeted tests that improve confidence without broad churn. |
| risk | safe |
| source | self |
| date_added | 2026-05-06 |
Branch Coverage Hotspot Hunter
Use this skill to improve confidence in high-risk branches before they slip below coverage gates.
Use this skill when
- Global coverage passes but branch coverage is weak in key modules.
- A PR changes conditional UI logic.
- You need a focused test plan from coverage artifacts.
Do not use this skill when
- The change is non-executable content (docs/config only).
- Coverage reports are unavailable.
Context
This repo enforces strong coverage thresholds. Branch deficits in complex patterns/components should be addressed with targeted tests, not blanket test growth.
Instructions
- Run coverage and inspect branch hotspots:
npm run coverage- review text + HTML report
- Rank hotspots by risk:
- user-facing behavior
- conditional complexity
- regression history/surface area
- Add focused tests for untested branches:
- success/failure paths
- optional prop branches
- keyboard/focus and interaction forks
- Re-run tests and coverage, then report deltas.
Output format
- Top hotspot list with rationale.
- Test additions mapped to covered branches.
- Before/after branch coverage summary.
Limitations
- Avoid chasing 100% by testing trivial implementation details.
- Prefer stable, behavior-level assertions over brittle internals.
