GitHub Actions Merge Queue Health Audit

Use this skill to catch unhealthy merge_group (or pull-request gate) workflows before queue times and failures block merges.

What this skill does

• Reads GitHub Actions run JSON exports
• Focuses on merge queue style events (merge_group by default)
• Aggregates health by repo/workflow (or repo/workflow/branch)
• Scores risk using failure rate, queue latency, and stale-success age
• Emits ok / warn / critical with optional CI fail gate

Inputs

Optional:

• RUN_GLOB (default: artifacts/github-actions/*.json)
• TOP_N (default: 20)
• OUTPUT_FORMAT (text or json, default: text)
• GROUP_BY (repo-workflow or repo-workflow-branch, default: repo-workflow)
• NOW_ISO (optional ISO timestamp override for deterministic replay)
• EVENTS (comma list, default: merge_group)
• WARN_FAILURE_RATE (0..1, default: 0.2)
• CRITICAL_FAILURE_RATE (0..1, default: 0.4)
• WARN_P95_QUEUE_MINUTES (default: 8)
• CRITICAL_P95_QUEUE_MINUTES (default: 20)
• WARN_STALE_SUCCESS_HOURS (default: 18)
• CRITICAL_STALE_SUCCESS_HOURS (default: 48)
• MIN_RUNS (default: 3)
• WORKFLOW_MATCH / WORKFLOW_EXCLUDE (regex, optional)
• BRANCH_MATCH / BRANCH_EXCLUDE (regex, optional)
• REPO_MATCH / REPO_EXCLUDE (regex, optional)
• EVENT_MATCH / EVENT_EXCLUDE (regex, optional)
• FAIL_ON_CRITICAL (0 or 1, default: 0)

Collect run JSON

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

Run

Text report:

RUN_GLOB='artifacts/github-actions/*.json' \
bash skills/github-actions-merge-queue-health-audit/scripts/merge-queue-health-audit.sh

JSON output + fail gate:

RUN_GLOB='artifacts/github-actions/*.json' \
OUTPUT_FORMAT=json \
FAIL_ON_CRITICAL=1 \
bash skills/github-actions-merge-queue-health-audit/scripts/merge-queue-health-audit.sh

Run against bundled fixtures:

NOW_ISO='2026-03-08T00:00:00Z' \
RUN_GLOB='skills/github-actions-merge-queue-health-audit/fixtures/*.json' \
bash skills/github-actions-merge-queue-health-audit/scripts/merge-queue-health-audit.sh

Output contract

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