GitHub Actions Conclusion Volatility Audit

Use this skill to detect unstable workflows that frequently flip between success and failure-like outcomes.

What this skill does

• Reads one or more workflow run JSON exports
• Groups runs by repository + workflow + branch
• Calculates volatility using conclusion transitions across run history
• Flags groups by warn/critical instability thresholds
• Emits text or JSON output for CI reporting and quality gates

Inputs

Optional: - RUN_GLOB (default: artifacts/github-actions/*.json) - TOP_N (default: 20) - OUTPUT_FORMAT (text or json, default: text) - MIN_RUNS (default: 5) — minimum runs before severity is applied - WARN_INSTABILITY_PCT (default: 35) - CRITICAL_INSTABILITY_PCT (default: 60) - FAIL_ON_CRITICAL (0 or 1, default: 0) - WORKFLOW_MATCH, WORKFLOW_EXCLUDE (regex, optional) - BRANCH_MATCH, BRANCH_EXCLUDE (regex, optional) - REPO_MATCH, REPO_EXCLUDE (regex, optional)

Failure-like conclusions are: failure, cancelled, timed_out, action_required, startup_failure.

Collect run JSON

gh run view <run-id> --json databaseId,workflowName,headBranch,conclusion,createdAt,updatedAt,url,repository 
  > artifacts/github-actions/run-<run-id>.json

Run

Text report:

RUN_GLOB='artifacts/github-actions/*.json' 
WARN_INSTABILITY_PCT=35 
CRITICAL_INSTABILITY_PCT=60 
bash skills/github-actions-conclusion-volatility-audit/scripts/conclusion-volatility-audit.sh

JSON output + fail gate:

RUN_GLOB='artifacts/github-actions/*.json' 
OUTPUT_FORMAT=json 
FAIL_ON_CRITICAL=1 
bash skills/github-actions-conclusion-volatility-audit/scripts/conclusion-volatility-audit.sh

Output contract

• Exit 0 in reporting mode
• Exit 1 when FAIL_ON_CRITICAL=1 and one or more critical groups are found
• Text output includes summary and top unstable workflow groups
• JSON output includes summary, ranked groups, and critical_groups