/harness-drift-from-history
One-command drift detection. Composes audit-list + oia-audit + audit-trend into a single primitive — finds the most recent audit in `metaharness-audit` namespace, runs a fresh audit against the current repo, diffs them via ADR-152 §3.1 similarity, and alerts when structural
$ npx -y skills add ruvnet/ruflo --skill harness-drift-from-history --agent claude-codeHow it fires
How this skill gets triggered: by you, by Claude, or both.
- Fires itselfAuto-invocation. Claude auto-loads it when your prompt matches the work.Auto-invocation is when the right skill fires by itself at the right moment, driven by a FLOW.md router and a hook, instead of you invoking it by name. It is the difference between a skill being installed and a skill actually getting used.Read the full definition →
- You can call itInvoke it directly when you want it.
- Slash command
/harness-drift-from-history
Context preview
The summary Claude sees to decide when to auto-load this skill.
One-command drift detection. Composes audit-list + oia-audit + audit-trend into a single primitive — finds the most recent audit in `metaharness-audit` namespace, runs a fresh audit against the current repo, diffs them via ADR-152 §3.1 similarity, and alerts when structural
SKILL.md
harness-drift-from-history.SKILL.mdname: harness-drift-from-history
description: One-command drift detection. Composes audit-list + oia-audit + audit-trend into a single primitive — finds the most recent audit in `metaharness-audit` namespace, runs a fresh audit against the current repo, diffs them via ADR-152 §3.1 similarity, and alerts when structural distance crosses `--threshold`. Iter 53 of ADR-150 deep integration.
argument-hint: "[--path .] [--baseline-since 7d] [--threshold 0.95] [--dry-run] [--format json|table]"
allowed-tools: Bash
The natural ops question after running `oia-audit` weekly is "did anything drift?" Before this skill, the answer required a three-step sequence:
npx ruflo metaharness audit-list --format json # → pick a key by hand
npx ruflo metaharness oia-audit --format json > /tmp/curr.json
npx ruflo metaharness audit-trend \
--baseline-key <picked-key> --current /tmp/curr.json \
--alert-on-distance-below 0.95
This skill collapses it into one command:
npx ruflo metaharness drift-from-history --threshold 0.95
What it does
1. Lists records from `metaharness-audit` namespace via audit-list.mjs 2. Picks the most recent record by `startedAt` (or `--baseline-since 7d` skips anything newer than 7 days) 3. Runs a fresh `oia-audit` against the current path 4. Diffs the two via audit-trend, applying `--alert-on-distance-below ${threshold}` 5. Returns the structured drift report
Architectural constraint inheritance (ADR-150)
| Constraint | How drift-from-history satisfies it | |---|---| | Removable | Pure subprocess composition over existing scripts — no new `@metaharness/*` import | | Optional | If oia-audit reports `degraded:true`, this skill exits 3 with a degraded payload | | Graceful | Empty audit history → exit 2 with hint to seed it; never crashes | | CI-gate | Smoke step 17z16 anchors the dispatcher entry + subcommand listing |
Exit codes
- 0 — similarity ≥ threshold (or threshold not crossed)
- 1 — drift detected: similarity < threshold (alert fired)
- 2 — config error (no history, audit-list failed)
- 3 — upstream metaharness absent (degraded payload returned)
Example
$ npx ruflo metaharness drift-from-history --threshold 0.95
# drift-from-history
Baseline: audit-2026-06-16T22-58-47-840Z
Current: 2026-06-16T23:05:02.231Z
Structural similarity: 1 (near-identical)
Distance: 0
✓ similarity ≥ 0.95 — OK
Implementation
[`scripts/drift-from-history.mjs`](../../scripts/drift-from-history.mjs)
Read more
name: harness-drift-from-history description: One-command drift detection. Composes audit-list + oia-audit + audit-trend into a single primitive — finds the most recent audit in `metaharness-audit` namespace, runs a fresh audit against the current repo, diffs them via ADR-152 §3.1 similarity, and alerts when structural distance crosses `--threshold`. Iter 53 of ADR-150 deep integration. argument-hint: "[--path .] [--baseline-since 7d] [--threshold 0.95] [--dry-run] [--format json|table]" allowed-tools: Bash
The natural ops question after running `oia-audit` weekly is "did anything drift?" Before this skill, the answer required a three-step sequence:
npx ruflo metaharness audit-list --format json # → pick a key by hand npx ruflo metaharness oia-audit --format json > /tmp/curr.json npx ruflo metaharness audit-trend \ --baseline-key <picked-key> --current /tmp/curr.json \ --alert-on-distance-below 0.95
This skill collapses it into one command:
npx ruflo metaharness drift-from-history --threshold 0.95
What it does
1. Lists records from `metaharness-audit` namespace via audit-list.mjs 2. Picks the most recent record by `startedAt` (or `--baseline-since 7d` skips anything newer than 7 days) 3. Runs a fresh `oia-audit` against the current path 4. Diffs the two via audit-trend, applying `--alert-on-distance-below ${threshold}` 5. Returns the structured drift report
Architectural constraint inheritance (ADR-150)
| Constraint | How drift-from-history satisfies it | |---|---| | Removable | Pure subprocess composition over existing scripts — no new `@metaharness/*` import | | Optional | If oia-audit reports `degraded:true`, this skill exits 3 with a degraded payload | | Graceful | Empty audit history → exit 2 with hint to seed it; never crashes | | CI-gate | Smoke step 17z16 anchors the dispatcher entry + subcommand listing |
Exit codes
- 0 — similarity ≥ threshold (or threshold not crossed)
- 1 — drift detected: similarity < threshold (alert fired)
- 2 — config error (no history, audit-list failed)
- 3 — upstream metaharness absent (degraded payload returned)
Example
$ npx ruflo metaharness drift-from-history --threshold 0.95 # drift-from-history Baseline: audit-2026-06-16T22-58-47-840Z Current: 2026-06-16T23:05:02.231Z Structural similarity: 1 (near-identical) Distance: 0 ✓ similarity ≥ 0.95 — OK
Implementation
[`scripts/drift-from-history.mjs`](../../scripts/drift-from-history.mjs)
An agent meta-harness for Claude Code and Codex. Agent = Model + Harness. The model writes; the harness gives it tools, memory, loops, sandboxes, and controls so it can actually work.
Repo: ruvnet/ruflo
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