plan-add-test-coverage

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.

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:
```
bun run test:cov 2>&1 | head -100
```
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 /plan-execute with this brief to create the implementation plan.