Improve Unit Tests (UT)

Use this skill to improve test coverage after code changes.

Usage

$improve-ut

Source of Truth

Read and follow these specs first:

1. .trellis/spec/unit-test/index.md
2. .trellis/spec/unit-test/conventions.md
3. .trellis/spec/unit-test/integration-patterns.md
4. .trellis/spec/unit-test/mock-strategies.md

If this skill conflicts with the unit-test specs, the specs win.

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Execution Flow

1. Inspect changed files:
   • git diff --name-only
2. Decide test scope using unit-test specs:
   • unit vs integration vs regression
   • mock vs real filesystem flow
3. Add/update tests using existing project test patterns
4. Run validation:

npm run lint
npm run typecheck
npm run test

5. Summarize decisions, updates, and remaining test gaps.

---

Output Format

## UT Coverage Plan
- Changed areas: ...
- Test scope (unit/integration/regression): ...

## Test Updates
- Added: ...
- Updated: ...

## Validation
- npm run lint: pass/fail
- npm run typecheck: pass/fail
- npm run test: pass/fail

## Gaps / Follow-ups
- <none or explicit rationale>