Conciseness

The body is dense, directive prose with zero explanation of concepts Claude already knows ("Do not report a complete lookback when coverage is partial"). It misses anchor 5 by one minor redundancy — the policy-gated action list (reply, PR approval, merge, deployment, notification) is enumerated in both "Change and verify" and "Report" — but has no unnecessary explanation, so anchor 3 does not fit.

Actionability

Concrete anchors are present ("Read `.agent-factory/config.yaml`", "`skill_prompts.factory-lookback`", "`workflows.lookback.implement`") alongside specific step directives (record source filters, dates, counts; follow every page or cursor). It is not anchor 5 because some directives stay abstract ("Prefer one verified correction at that boundary over a pile of caller-specific patches"), and not anchor 3 because the guidance is specific and executable rather than pseudocode-like.

Workflow Clarity

A clear phase sequence (Build evidence set → Find the systemic cause → Change and verify → Report) with explicit validation checkpoints and feedback loops: the coverage guard, re-triage on new replies with "Keep the item open when the answer is still incomplete", post-fix regression checks, signal re-inspection ("A test, merge, or 'fixed' label alone does not prove that the live recurrence stopped"), and a per-pattern report checklist. This is a batch/external-action workflow and validation is explicitly present, matching anchor 5.

Progressive Disclosure

The skill is self-contained with no bundle files, and the body is organized into clear section headers matching the workflow phases. It falls short of anchor 5 because the "Find the systemic cause" section packs three distinct sub-workflows (trace prior dispositions, re-triage held reports, reproduce representative cases) into unstructured prose — a minor organization gap — but anchor 3 does not fit since structure and navigation are good.

Specificity

"auditing recurring feedback, telemetry, errors, and brittle delivery paths to find systemic fixes" lists several concrete actions and objects with only minor gaps. It falls short of anchor 5 because "brittle delivery paths" and "systemic fixes" remain somewhat abstract, but exceeds anchor 3 since more than 1-2 concrete actions are enumerated.

Completeness

The description explicitly answers both what ("auditing recurring feedback, telemetry, errors, and brittle delivery paths to find systemic fixes") and when ("Use for periodic or requested cross-source lookbacks, not routine single-item intake") with a concrete trigger phrase plus a negative boundary. This matches anchor 5 rather than 4 because the 'when' clause is already explicit and specific.

Trigger Term Quality

"recurring feedback", "telemetry", "errors", and "cross-source lookbacks" are natural phrases users would plausibly say, giving good keyword coverage. It is not anchor 5 because common synonyms like "retrospective", "post-mortem", or "incident review" are missing, and not anchor 3 because coverage is genuinely good rather than merely "some relevant keywords".

Distinctiveness Conflict Risk

The "not routine single-item intake" carve-out and the periodic cross-source framing establish a clear niche with mostly distinct triggers. It stops short of anchor 5 because auditing "feedback, errors, telemetry" could still overlap with routine debugging or triage skills.