lisa-improve-test-coverage

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

1. Find coverage config (jest.config.js, vitest.config.ts, .nycrc, etc.)
2. Run coverage report to get current state:

   bun run test:cov 2>&1 | head -100
   

3. 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.