proffesor-for-testing/agentic-qe/coverage-guard

Claude Code and agent skill by proffesor-for-testing/agentic-qe

Trust tier 3
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Checking that the SKILL.md file is still in the repository.

Use when you want to prevent coverage regressions during development. Activate with /coverage-guard to warn when coverage drops below threshold after code changes.

Install

npx vskill@latest install proffesor-for-testing/agentic-qe/coverage-guard

SKILL.md

Coverage Guard Mode

When activated, checks coverage after test runs and warns if it drops below the configured threshold.

What It Does

After any test execution (via Bash tool), compares coverage to the threshold in config.json. Warns (doesn't block) if coverage decreased.

Activation

/coverage-guard

Configuration

Edit config.json in this skill directory to set thresholds:

json
{
  "thresholds": {
    "statements": 80,
    "branches": 70,
    "functions": 75,
    "lines": 80
  },
  "coverageCommand": "npx jest --coverage --coverageReporters=json-summary",
  "coverageFile": "coverage/coverage-summary.json"
}

Hook Configuration

json
{
  "hooks": {
    "PostToolUse": [
      {
        "matcher": "Bash",
        "hook": ".claude/skills/coverage-guard/scripts/check-coverage.sh",
        "condition": "command contains 'jest' OR command contains 'vitest' OR command contains 'npm test'"
      }
    ]
  }
}

Enforcement Logic

bash
#!/bin/bash
# check-coverage.sh
COVERAGE_FILE="coverage/coverage-summary.json"
THRESHOLD=80
 
if [ -f "$COVERAGE_FILE" ]; then
  STATEMENTS=$(jq '.total.statements.pct' "$COVERAGE_FILE")
  BRANCHES=$(jq '.total.branches.pct' "$COVERAGE_FILE")
 
  if (( $(echo "$STATEMENTS < $THRESHOLD" | bc -l) )); then
    echo "WARNING: Statement coverage ($STATEMENTS%) below threshold ($THRESHOLD%)"
    echo "Coverage dropped — check which files lost coverage."
  fi
 
  if (( $(echo "$BRANCHES < 70" | bc -l) )); then
    echo "WARNING: Branch coverage ($BRANCHES%) below 70%"
  fi
fi

Gotchas

  • Coverage check runs AFTER the test command — if tests crash, no coverage report is generated
  • Coverage-summary.json must be configured as a reporter — default Jest config may not include it
  • Threshold comparisons use floating point — 79.999% will trigger below 80% threshold
  • Branch coverage is typically 10-15% lower than line coverage — set thresholds accordingly

Security

  • Security scanPassed, 90 of 100Pattern checks on the skill's files.
  • Model reviewPassed

See the full security report

Quality evaluation

  • Task evaluationNot runNo evaluation yet. Run one in Skill Studio.

See evaluation results

Source

Popularity

Repository stars
436
Repository forks
78
Repository npm downloads, 7 days
9,963
7-day trend score
51

Stars and forks are for the whole GitHub repository, not this skill alone. Downloads are for the repository's npm package. Refreshed 10 Aug 2026, 2 months ago.

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