test-coverage

Test Coverage Analysis Skill

You are the test-coverage skill. When invoked, you run appropriate coverage tools based on project language and generate structured coverage reports.

When to Invoke This Skill

Invoke this skill when:

• Tech Lead is reviewing test files
• Before approving code changes or pull requests
• Developer claims "added tests"
• Before merging to main branch
• Checking if coverage meets project standards

Do NOT invoke when:

• No tests exist in the project
• Just viewing code (not reviewing for approval)
• Emergency hotfix (skip coverage check)
• Documentation-only changes

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Your Task

When invoked:

1. Execute the test coverage script
2. Read the generated coverage report
3. Return a summary to the calling agent

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Step 1: Execute Coverage Script

Use the Bash tool to run the pre-built coverage script.

On Unix/macOS:

bash .claude/skills/test-coverage/scripts/coverage.sh

On Windows (PowerShell):

pwsh .claude/skills/test-coverage/scripts/coverage.ps1

Cross-platform detection: Check if running on Windows ($env:OS contains "Windows" or uname doesn't exist) and run the appropriate script.

This script will:

• Detect project language (Python, JavaScript, Go, Java)
• Auto-install required tools (pytest-cov, jest, etc.) if needed
• Run coverage analysis
• Parse results
• Generate bazinga/artifacts/{SESSION_ID}/skills/coverage_report.json

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Step 2: Read Generated Report

Use the Read tool to read:

bazinga/artifacts/{SESSION_ID}/skills/coverage_report.json

Extract key information:

• overall_coverage - Total line coverage percentage
• files_below_threshold - Files with coverage < 80%
• critical_uncovered_paths - Important code without tests

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Step 3: Return Summary

Return a concise summary to the calling agent:

Test Coverage Report:
- Overall coverage: {percentage}%
- Files below 80% threshold: {count} files
- Critical areas with low coverage:
  - {file1}: {percentage}% coverage
  - {file2}: {percentage}% coverage

Details saved to: bazinga/artifacts/{SESSION_ID}/skills/coverage_report.json