Conciseness

The body is dense, rule-first prose with no padding about concepts Claude already knows, but the approval boundary is stated three times ("Skill changes are proposals until the user explicitly approves the scoped changes", "use the approval boundary above", "each originating skill still enforces the approval boundary") and the multi-skill boundary statements repeat across sections. That places it at anchor 4 ("efficient; minor instances... that could be trimmed") rather than anchor 5's "every token earns its place".

Actionability

Concrete decision tables (decay type → revalidation method; outcome → use-when/result), a complete copy-paste-ready YAML contract example, install commands, and a ready-made Copilot prompt. However, the core steps rely on judgment phrasing ("choose the primary decay type", "use the consequence of staleness to choose urgency") and all worked examples are offloaded to references/examples.md rather than any inline end-to-end case, leaving minor gaps versus anchor 5's "specific examples cover the common cases".

Workflow Clarity

A clearly numbered 1–5 sequence (identify → classify → check/outcome → contract → apply/report) with explicit validation checkpoints ("Perform the smallest check that can answer the claim. Record the evidence, scope/version checked, and actual check date"; "leave validation pending and name the missing evidence"), an error-recovery feedback loop ("After editing, reread the affected claims and check their source links and consistency"), and a report checklist ("Report each reviewed claim's type/rate, evidence or gap, disposition... plus next check trigger"). Destructive operations (retire, skill edits) are gated behind explicit approval and unresolved-state handling, matching anchor 5.

Progressive Disclosure

Two references (skill-review.md, examples.md) are real files, one level deep, clearly signaled with purpose ("Read references/skill-review.md for the review and approval workflow"; "For worked examples and review cases, read references/examples.md"), and the split is sensible. But the ~240-line body carries substantial niche rule content (self-improvement handoff details, the skill-findings/healing sections) that could itself live in a reference, leaving it at anchor 4's "minor organization gaps" rather than a lean overview at anchor 5.

Specificity

Names multiple concrete actions — "Revalidate persistent agent knowledge by classifying why it can become stale and how quickly it changes, then retain, revise, externalize, or retire it" — covering the full outcome space (classify, revalidate, retain, revise, externalize, retire). This matches the anchor "Lists multiple specific concrete actions; comprehensive coverage"; anchor 4 would require a coverage gap, and none is evident in the core workflow.

Completeness

Both questions are explicitly answered: what ("Revalidate... by classifying why... then retain, revise, externalize, or retire") and when ("Use when reviewing skills... when an owner, decision, or dependency changes; or when self-improvement captures, reviews, or promotes a learning"). Concrete trigger phrases are present, matching the anchor-5 example structure exactly; anchor 4 would require the 'when' to be less explicit, which it is not.

Trigger Term Quality

Natural trigger phrases span six context types ("skills, stored instructions, facts, preferences, assumptions, or workflows"), three change events ("an owner, decision, or dependency changes"), and the self-improvement lifecycle, plus explicit exclusions ("Not for runtime context-window degradation, unsaved task observations, or age-based deletion"). Coverage including synonyms is comprehensive, matching anchor 5 rather than the "a few natural terms missing" of anchor 4.

Distinctiveness Conflict Risk

A clear niche (staleness of persistent knowledge) with explicit boundary statements against neighboring skills: "Works independently of self-improvement. Not for runtime context-window degradation, unsaved task observations, or age-based deletion." This is more distinct than anchor 4's "minor overlap risk with closely related skills" — the main conflicts (self-improvement, context-surfing, self-healing) are pre-empted.