Coveralls Coverage Management Skill

Manage and analyze Coveralls coverage reports, thresholds, and coverage history.

MANDATORY: Discovery-First Pattern

Always check current Coveralls configuration before modifying coverage settings.

Phase 1: Discovery

#!/bin/bash

echo "=== Coveralls Configuration ==="
cat .coveralls.yml 2>/dev/null || echo "No .coveralls.yml found"

echo ""
echo "=== CI Coverage Upload ==="
grep -r 'coveralls\|COVERALLS' .github/workflows/ .circleci/ .travis.yml 2>/dev/null | head -10

echo ""
echo "=== Coverage Tool Config ==="
cat .nycrc 2>/dev/null || cat jest.config.* 2>/dev/null | grep -A5 'coverage' | head -10
cat .coveragerc 2>/dev/null | head -10

Phase 2: Analysis

#!/bin/bash
REPO="${1:-${COVERALLS_REPO}}"

echo "=== Repository Coverage ==="
curl -s "https://coveralls.io/github/${REPO}.json" 2>/dev/null | jq '{
  coverage: .covered_percent,
  badge_url: .badge_url,
  created_at: .created_at,
  commit_sha: .commit_sha
}' 2>/dev/null

echo ""
echo "=== Recent Builds ==="
curl -s "https://coveralls.io/github/${REPO}.json?page=1" 2>/dev/null | jq '{
  coverage: .covered_percent,
  change: .coverage_change,
  relevant_lines: .relevant_lines,
  covered_lines: .covered_lines
}' 2>/dev/null

Output Rules

• TOKEN EFFICIENCY: Target <=50 lines per output
• Report coverage percentage with change from previous
• Show relevant vs covered line counts
• Never expose repo tokens in output

Common Operations

Build Coverage History

#!/bin/bash
REPO="${1:?Repo required (owner/name)}"
echo "=== Coverage History ==="
curl -s "https://coveralls.io/github/${REPO}.json?page=1" 2>/dev/null | jq '{
  current: .covered_percent,
  change: .coverage_change,
  repo_token_set: (.repo_token != null)
}' 2>/dev/null

Upload Verification

#!/bin/bash
echo "=== Recent Upload Status ==="
grep -r 'coveralls' .github/workflows/ 2>/dev/null | head -5
echo ""
echo "=== Coverage File ==="
find . -name "lcov.info" -o -name "coverage.xml" 2>/dev/null | head -5

Safety Rules

• Never commit .coveralls.yml with repo tokens -- use CI environment variables
• Verify coverage uploads after CI pipeline changes
• Review coverage decreases on PRs before merging
• Configure minimum coverage thresholds to prevent regressions

Output Format

Present results as a structured report:

Managing Coveralls Report
═════════════════════════
Resources discovered: [count]

Resource       Status    Key Metric    Issues
──────────────────────────────────────────────
[name]         [ok/warn] [value]       [findings]

Summary: [total] resources | [ok] healthy | [warn] warnings | [crit] critical
Action Items: [list of prioritized findings]

Target ≤50 lines of output. Use tables for multi-resource comparisons.

Anti-Hallucination Rules

1. NEVER assume resource names — always discover via CLI/API in Phase 1 before referencing in Phase 2.
2. NEVER fabricate metric names or dimensions — verify against the service documentation or --help output.
3. NEVER mix CLI commands between service versions — confirm which version/API you are targeting.
4. ALWAYS use the discovery → verify → analyze chain — every resource referenced must have been discovered first.
5. ALWAYS handle empty results gracefully — an empty response is valid data, not an error to retry.

Counter-Rationalizations

Shortcut	Counter	Why
"I'll skip discovery and check known resources"	Always run Phase 1 discovery first	Resource names change, new resources appear — assumed names cause errors
"The user only asked for a quick check"	Follow the full discovery → analysis flow	Quick checks miss critical issues; structured analysis catches silent failures
"Default configuration is probably fine"	Audit configuration explicitly	Defaults often leave logging, security, and optimization features disabled
"Metrics aren't needed for this"	Always check relevant metrics when available	API/CLI responses show current state; metrics reveal trends and intermittent issues
"I don't have access to that"	Try the command and report the actual error	Assumed permission failures prevent useful investigation; actual errors are informative