Conciseness

The body systematically restates the same policies: autonomous-mode rules ('skip questions, mark ambiguous as stale, always report') appear in ~8 places (mode table, rules section, Core Rule 4, Phase 1, Subagent Strategy, Phase 3, Phase 5, output section); memory-drift-is-supplementary in 5 places; problem-domain-vs-implementation three times inside 'Before archiving' alone; Replace-evidence sufficiency in 4 sections; and the Common Mistakes table restates earlier rules verbatim. This is noticeably verbose with several padded sections — roughly 150 lines could be cut without information loss — rather than 'mostly efficient with some tightening' (anchor 3), and it never explains concepts Claude already knows, keeping it above anchor 1's severity.

Actionability

For an instruction-only skill the guidance is fully executable: copy-paste ready templates (report format, question format, no-candidates message, subagent prompt block), exact frontmatter keys ('status: stale', 'stale_reason', 'stale_date: YYYY-MM-DD', 'superseded_by', 'archived_date'), exact paths ('docs/solutions/_archived/'), ordered scope-matching strategies, numeric routing thresholds, and concrete branch-naming examples. This matches anchor 5's 'copy-paste ready, specific examples cover the common cases'.

Workflow Clarity

Phases 0–5 are clearly sequenced with explicit validation gates for a destructive/batch operation: evidence-sufficiency assessment before any Replace, auto-archive criteria requiring both implementation AND problem domain to be gone, write-failure fallback to 'recommended' status, conservative stale-marking when uncertain, and git-context detection before commit. Error-recovery feedback loops and a mistakes checklist are both present, matching anchor 5 and satisfying the destructive/batch validation cap.

Progressive Disclosure

The single 550-line file has substantial internal structure (clear ## sections, tables, templates), so it is above anchor 2's 'minimal structure', but content that clearly belongs in separate reference files — the full report format spec, the subagent prompt templates, and the Phase 5 commit policy — is inlined with no bundle files at all. Anchor 3's 'content that should be separate is inline' fits; anchor 4 would require an appropriate split.

Specificity

The description names the domain ('docs/solutions/ learnings') and one concrete action ('reviewing docs/solutions/ for accuracy'), but never states what the skill actually does — update, replace, archive, refresh pattern docs, commit — leaving action coverage non-comprehensive. It sits between anchor 2 (domain with minimal action) and anchor 4 (several specific actions), and the single explicit review action keeps it at 3 rather than 2.

Completeness

The 'when' is explicit and rich ('Use when...' with four concrete trigger scenarios), and a 'what' is present ('reviewing docs/solutions/ for accuracy'), so both halves exist. The 'what' side is thin — no mention of the maintenance actions or the summary report deliverable — matching anchor 4's pattern of both present with one side needing more specificity rather than anchor 3's missing 'when'.

Trigger Term Quality

Triggers like 'after refactors, migrations, or dependency upgrades', 'a retrieved learning feels outdated', 'contradicts a recently solved problem', and 'pattern docs no longer reflect current code' are natural phrases a maintainer would say. A few natural variations are missing (e.g., 'knowledge base', 'out of date', 'documentation drift'), so it falls short of the comprehensive synonym coverage of anchor 5.

Distinctiveness Conflict Risk

Triggers reference ecosystem-specific artifacts ('docs/solutions/', 'learnings', 'pattern docs') and stake out a clear maintenance niche (stale learnings after refactors) clearly distinct from the companion capture skill. Conflict risk with generic skills is minimal, matching anchor 5.