GitHub Actions SHA Rerun Debt Audit

Use this skill to detect commits that trigger repeated GitHub Actions reruns and failed outcomes across multiple workflows.

What this skill does

• Reads GitHub Actions run JSON exports
• Correlates attempt history by run id and latest outcome per run
• Aggregates rerun debt by repository + commit SHA
• Scores risk using rerun rate, failed-run count, workflow spread, and wasted rerun minutes
• Emits severity (ok, warn, critical) for CI gates

Inputs

Optional:

• RUN_GLOB (default: artifacts/github-actions/*.json)
• TOP_N (default: 20)
• OUTPUT_FORMAT (text or json, default: text)
• MIN_RUNS (minimum runs per SHA, default: 3)
• WARN_RERUN_RATE (0..1, default: 0.25)
• CRITICAL_RERUN_RATE (0..1, default: 0.45)
• WARN_FAILED_RUNS (default: 2)
• CRITICAL_FAILED_RUNS (default: 4)
• WARN_WASTED_MINUTES (default: 25)
• CRITICAL_WASTED_MINUTES (default: 75)
• WARN_WORKFLOWS (distinct workflows affected, default: 2)
• CRITICAL_WORKFLOWS (default: 4)
• WORKFLOW_MATCH / WORKFLOW_EXCLUDE (regex, optional)
• BRANCH_MATCH / BRANCH_EXCLUDE (regex, optional)
• EVENT_MATCH / EVENT_EXCLUDE (regex, optional)
• REPO_MATCH / REPO_EXCLUDE (regex, optional)
• HEAD_SHA_MATCH / HEAD_SHA_EXCLUDE (regex, optional)
• FAILURE_CONCLUSIONS (comma-separated, default: failure,cancelled,timed_out,startup_failure,action_required)
• FAIL_ON_CRITICAL (0 or 1, default: 0)

Collect run JSON

gh run view <run-id> --attempt <attempt> \
  --json databaseId,runAttempt,workflowName,event,headBranch,headSha,conclusion,createdAt,updatedAt,runStartedAt,url,repository \
  > artifacts/github-actions/run-<run-id>-attempt-<attempt>.json

Run

Text report:

RUN_GLOB='artifacts/github-actions/*.json' \
bash skills/github-actions-sha-rerun-debt-audit/scripts/sha-rerun-debt-audit.sh

JSON output + fail gate:

RUN_GLOB='artifacts/github-actions/*.json' \
OUTPUT_FORMAT=json \
FAIL_ON_CRITICAL=1 \
bash skills/github-actions-sha-rerun-debt-audit/scripts/sha-rerun-debt-audit.sh

Run against bundled fixtures:

RUN_GLOB='skills/github-actions-sha-rerun-debt-audit/fixtures/*.json' \
bash skills/github-actions-sha-rerun-debt-audit/scripts/sha-rerun-debt-audit.sh

Output contract

• Exit 0 in report mode (default)
• Exit 1 when FAIL_ON_CRITICAL=1 and one or more SHA groups are critical
• Text mode prints summary + ranked SHA risk groups
• JSON mode prints summary + ranked groups + critical groups