| name | c64-coverage |
| description | Raise Codecov-reported test coverage for C64 Commander to a defined target without duplicating tests or degrading signal quality. |
| argument-hint | target-percentage |
| user-invokable | true |
| disable-model-invocation | true |
Skill: C64 Coverage Hardening
Purpose
Increase repository coverage as reported by Codecov to the specified percentage.
Coverage must be meaningful, non-duplicative, and aligned with the project’s Android-first strategy.
Preconditions
- Working tree is clean.
- CI pipeline is functional.
- Coverage is reported to Codecov.
- Tests can be executed locally.
If any precondition fails, stop and report.
Execution Workflow
Step 1 - Establish Baseline
- Run full test suite.
- Determine current coverage locally.
- Confirm Codecov-reported coverage for the default branch.
- Identify gap to target.
Step 2 - Identify Weak Areas
- Locate files or modules below threshold.
- Prioritize:
- Core domain logic
- Error handling
- Edge cases
- Parsing logic
- State transitions
Do not prioritize trivial getters or framework glue.
Step 3 - Add High-Signal Tests
Rules:
- Do not duplicate behavior already covered.
- Avoid coverage inflation via trivial tests.
- Android route is primary.
- Add iOS or Web tests only when platform-specific behavior exists.
- Prefer unit tests.
- Use Playwright only for meaningful integration coverage.
Step 4 - Validate
- Run full test suite.
- Ensure no regressions.
- Confirm coverage meets or exceeds target.
- Confirm Codecov delta is positive.
Constraints
- Do not refactor unrelated code.
- Do not weaken tests.
- Do not suppress coverage warnings.
- Maintain deterministic test behavior.
Completion Criteria
- Coverage ≥ target.
- All tests pass.
- No duplicate or artificial coverage patterns introduced.
- Clean working tree.
