QA Changelog Analyzer

QA Changelog Analyzer

Purpose

Analyze code changes (git diff, commit history, branch comparisons) to determine testing impact. Map changed files to modules/components, identify affected tests, and produce actionable recommendations: tests to run (regression scope), tests to update (if source changed), and tests to add (if new code uncovered).

Trigger Phrases

• "What tests should I run for this PR?"
• "Analyze git diff for test impact"
• "Changelog analysis" / "Change impact report"
• "Which tests are affected by [branch/commit]?"
• "Recommend regression scope for [changes]"
• "Tests to add/update for recent commits"

Workflow

1. Read git diff — Staged (git diff --cached), committed (git diff HEAD~1..HEAD), or between branches (git diff base..HEAD)
2. Map changed files to modules — Use directory structure, package/import conventions, or config (see references/git-analysis-patterns.md)
3. Identify affected test files — Coverage-based, path-based, or import-based mapping
4. Recommend:
   • Tests to run — Regression scope (must run, should run, optional)
   • Tests to update — If source changed and tests may be outdated
   • Tests to add — If new code has no coverage

Change Analysis

See references/impact-mapping.md for mapping strategies.

Output Deliverables

1. Change Impact Report — Summary of changed files, modules affected, and impact level
2. Recommended Regression Scope — Must run / Should run / Optional test lists
3. Task Suggestions for qa-task-creator — Add tests, update tests, remove obsolete tests

Change Impact Report Template

# Change Impact Report — [Branch/PR/Commit]

## Summary
| Change Type | Count | Modules Affected |
|-------------|-------|------------------|
| Added | N | [list] |
| Modified | N | [list] |
| Deleted | N | [list] |

## Regression Scope

### Must Run (High Impact)
- [test file paths]

### Should Run (Medium Impact)
- [test file paths]

### Optional (Low Impact)
- [test file paths]

## Task Suggestions
- **Add:** [new modules/files needing tests]
- **Update:** [tests that may need assertion/import updates]
- **Remove:** [obsolete tests for deleted code]

Integration with Other Skills

Scope

Can do (autonomous):

• Parse git diff (staged, committed, between branches)
• Map changed files to modules/components
• Identify affected test files (path, import, or coverage-based)
• Produce change impact report and regression scope
• Generate task suggestions for qa-task-creator

Cannot do (requires confirmation):

• Run tests or generate coverage (consume existing data)
• Modify source or test code
• Exclude files from analysis without justification

Will not do (out of scope):

• Execute tests or deployments
• Modify git history or branches
• Override project-specific mapping without config

Quality Checklist

• Git diff correctly parsed (staged/committed/branch)
• Changed files mapped to modules
• Affected tests identified (path, import, or coverage)
• Regression scope categorized (must/should/optional)
• Task suggestions actionable for qa-task-creator
• No hardcoded paths; respect project structure
• Config changes flagged for env validation

Troubleshooting

Reference Files