helderberto/coverage
coverage/SKILL.md
Check test coverage for unstaged changes. Use when user asks to "check coverage", "/coverage", or wants to see which unstaged changes lack test coverage. Don't use for projects without lcov coverage output, running the full test suite without coverage, or checking coverage of already-committed changes.
$ install --global
skillsauthnpx skillsauth add helderberto/skills coverageInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
3 of 9 scanners reported clean
Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
3
Scanners Passed
9
Scanners in report
Clean
TrivyContainer and dependency vulnerability scanner
95%
Clean
SemgrepStatic code analysis for vulnerabilities
95%
Clean
mcp-scan (Snyk)Model Context Protocol security validation
95%
Skipped
Snyk (dep)Open source security scanning
50%
Skipped
Socket.devSupply chain security analysis
50%
Skipped
VirusTotalMulti-engine malware detection
50%
Skipped
CrowdStrikeAdvanced threat intelligence
50%
Skipped
OSV-ScannerOpen Source Vulnerability database check
50%
Skipped
OWASP Dep-Check
50%
Last scanned: Apr 30, 2026, 2:40 AM8.2s1 file scanned
SKILL.md
- name:
- coverage
- description:
- Check test coverage for unstaged changes. Use when user asks to "check coverage", "/coverage", or wants to see which unstaged changes lack test coverage. Don't use for projects without lcov coverage output, running the full test suite without coverage, or checking coverage of already-committed changes.
Coverage Check
Context
Run in parallel:
git diff --name-only- get unstaged filesgit diff -U0 --no-color- get changed line numbers
Commands
Sequential:
npm run test:ci- vitest with coveragenpm run coverage:report- generate lcov/text reports
Workflow
- Get unstaged files and line ranges (parallel):
git diff --name-onlygit diff -U0 --no-color
- Run coverage:
npm run test:cinpm run coverage:report
- Save diff to a temp file, then run:
git diff -U0 --no-color > /tmp/changes.diff python3 scripts/parse-lcov.py --lcov coverage/lcov.info --diff /tmp/changes.diff - Report uncovered lines from stdout:
file.ts:42 - Summary from stderr: X/Y changed lines covered
LCOV Format
Parse coverage/lcov.info:
SF:src/utils/helper.ts
DA:10,1 # line 10, covered (hit 1 time)
DA:11,0 # line 11, NOT covered
DA:12,5 # line 12, covered (hit 5 times)
end_of_record
Key fields:
SF:-- source file pathDA:line,hits--0= uncovered,>0= coveredend_of_record-- end of file section
Match SF: paths to git diff files. For each changed line, check DA: entry. If hits is 0, report as uncovered.
Anti-Rationalization
| Excuse | Rebuttal | |---|---| | "Coverage doesn't guarantee quality" | True, but uncovered code guarantees zero automated verification. | | "It's just a config change" | Config changes break production too. If there's logic, check coverage. | | "100% is overkill" | Nobody asked for 100%. Check that changed lines are covered. | | "The test suite is already green" | Green suite with uncovered changes = false confidence. |
Rules
- Only analyze unstaged changes (
git diff) - Use sequential commands:
test:cithencoverage:report - Use
scripts/parse-lcov.pyto parse lcov data and map to changed lines - Report uncovered lines:
file.ts:42 - Ignore files without coverage data (non-code files)
Error Handling
npm run test:cifails -- report test failures and stopcoverage/lcov.infonot found -- verifycoverage.reporterincludeslcovin test runner configgit diffreturns no changes -- report no unstaged changes to check
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