improve-tests

name	improve-tests
description	This skill should be used when improving test quality. It scans the test suite for weak, brittle, or poorly-written tests, generates a brief with improvement opportunities, and creates a plan with tasks to strengthen the tests.
allowed-tools	["Read","Bash","Glob","Grep"]

Improve Test Quality

Target: $ARGUMENTS

If no argument provided, scan the full test suite.

Step 1: Gather Requirements

1. Run test suite to establish baseline:

   bun run test 2>&1 | tail -20
   

2. Scan test files for quality issues:
   • Weak assertions (toBeTruthy, toBeDefined instead of specific values)
   • Missing edge cases (no boundary values, no error paths)
   • Implementation coupling (testing internals rather than behavior)
   • Missing error path coverage
   • Duplicated setup that could indicate missing abstractions
3. Identify 10-20 test files with highest improvement potential, noting:
   • File path
   • Issues found (weak assertions, missing edge cases, etc.)
   • Estimated impact of improvement

Step 2: Compile Brief and Delegate

Compile the gathered information into a structured brief:

Improve test quality across the test suite.

Test files needing improvement (ordered by impact):
1. [test file] - [issues found]
   - Weak assertions: [count]
   - Missing edge cases: [description]
   - Implementation coupling: [description]
2. ...

Verification: `bun run test` -> Expected: All tests pass, improved assertions and coverage

Invoke /implement with this brief to create the implementation plan.