| name | lisa-improve-test-coverage |
| description | This skill should be used when increasing test coverage to a specified threshold percentage. It runs the coverage report, identifies files with the lowest coverage, generates a brief with coverage gaps, and creates a plan with tasks to add the missing tests. |
| allowed-tools | ["Read","Bash","Glob","Grep"] |
Increase Test Coverage
Target threshold: $ARGUMENTS%
If no argument provided, prompt the user for a target.
Step 1: Gather Requirements
- Find coverage config (jest.config.js, vitest.config.ts, .nycrc, etc.)
- Run coverage report to get current state:
status=0
bun run test:cov >coverage.log 2>&1 || status=$?
head -n 100 coverage.log; echo "exit=$status"
The status is captured before the pipe, because a pipeline reports its LAST stage's exit code — head always succeeds, so a failing run reads as exit=0 (falsifiable-checks, pager-shadowed status). || status=$? rather than ; status=$?: under set -e the ; form exits before the assignment, so the failure is never reported at all.
- Identify the 20 files with lowest coverage, noting:
- File path
- Current coverage % (lines, branches, functions)
- Which lines/branches are uncovered
Step 2: Compile Brief and Delegate
Compile the gathered information into a structured brief:
Increase test coverage from [current]% to $ARGUMENTS%.
Files needing coverage (ordered by coverage gap):
1. [file] - [current]% coverage (target: $ARGUMENTS%)
- Uncovered: [lines]
- Missing branch coverage: [lines]
2. ...
Configuration: [config file path], update thresholds to $ARGUMENTS%
Verification: `bun run test:cov` → Expected: All thresholds pass at $ARGUMENTS%
Invoke /lisa:implement with this brief to create the implementation plan.
