blueprint-derive-tests

# /blueprint:derive-tests Analyze git history to identify fix and feature commits lacking corresponding test changes, then generate a structured Test Regression Plan (TRP) document as a prioritized test backlog. **Use case**: Systematically close test coverage gaps by mining commit history for bug fixes and features that shipped without regression tests. ## When to Use This Skill | Use this skill when... | Use alternative when... | |------------------------|-------------------------| | Bug fixes ship without regression tests | You need to run existing tests (`/test:run`) | | Want a prioritized test backlog from history | Writing tests for a specific feature (manual TDD) | | Onboarding a project and assessing test health | Checking current test coverage metrics | | Need to find which fixes lack test coverage | Designing a test strategy from scratch (`/test:architecture`) | ## Context - Git repository: !`git rev-parse --git-dir` - Blueprint initialized: !`find . -path '*/docs/blueprint/*' -maxdepth 3 -name 'manifest.json' -type f` - Total commits: !`git rev-list --count HEAD` - Test framework: !`find . -maxdepth 3 \( -name 'vitest.config.*' -o -name 'jest.config.*' -o -name 'pytest.ini' -o -name 'pyproject.toml' -o -name 'Cargo.toml' -o -name 'go.mod' \) -type f -print -quit` - Test files: !`find . -maxdepth 4 -type f \( -name '*.test.*' -o -name '*.spec.*' -o -name 'test_*' -o -name '*_test.*' \) -print` - Conventional commits sample: !`git log --format="%s" --max-count=...