SKILL

The 13th worker (ADR-150 Phase 2) — runs three MetaHarness static surfaces in one shot, computes a composite worst-severity signal, and persists the audit record to memory so drift over time is visible.

Algorithm

Implementation: scripts/oia-audit.mjs.

1. Run harness oia-manifest <path> — Open Infrastructure Architecture layer alignment (L1-L9).
2. Run harness threat-model <path> — categorized MCP-surface threat report with worst: clean|low|medium|high.
3. Run harness mcp-scan <path> — per-server/tool policy + permissions
   • dep findings.
4. Composite worst = max(threatModel.worst, max(mcpScan.findings.severity)).
5. Persist payload to memory namespace metaharness-audit with key audit-<iso-timestamp> (unless --dry-run).
6. --alert-on-worst <severity>: exit 1 if composite worst ≥ threshold.

Graceful degradation

When ALL three components report metaharness-not-available, the script emits the standard degraded payload and exits 0. When only some are degraded, each individual component carries its own degraded: true flag in the audit record — the audit still runs and persists what it could gather.

CI / cron integration

Designed for weekly cron in .github/workflows/:

on:
  schedule:
    - cron: '17 4 * * 0'  # Sundays at 04:17 UTC
jobs:
  oia-audit:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
      - run: node plugins/ruflo-metaharness/scripts/oia-audit.mjs --alert-on-worst high

--alert-on-worst high fails the job on any HIGH-severity finding; drift below HIGH is logged but doesn't block.

Memory namespace

Each audit run stores under metaharness-audit:audit-<iso-ts>. To list recent audits:

npx @claude-flow/cli@latest memory list --namespace metaharness-audit --limit 10

To diff two audits (drift detection):

A=$(npx ... memory retrieve --key audit-2026-06-01... --namespace metaharness-audit)
B=$(npx ... memory retrieve --key audit-2026-06-15... --namespace metaharness-audit)
# Compare composite.worst, components.threatModel.worst, etc.

A future ADR can wire this into a dedicated cost-diff-style diff viewer specifically for audit drift.

Pairs with

• harness-threat-model — the underlying threat-model component
• harness-mcp-scan — the underlying MCP-scan component
• harness-score + harness-genome — readiness metrics (orthogonal to audit)