Conciseness

Every section earns its place: the workflow is four terse steps, the format is given as copy-paste blocks, categories live in a compact table, and the only environment-specific detail ("The capture hook auto-detects `Wiki: <slug>` and links the learning to that wiki via `learnings_wiki`") is genuinely non-obvious. There is no explanation of concepts Claude already knows, matching the lean anchor.

Actionability

The `[LEARN]` format blocks and the worked example are concrete and reusable, and the categories table makes rule classification actionable. However, the persistence step ("persist to LEARNED section or project memory") never specifies where that section or memory lives, leaving a minor execution gap that keeps it out of the fully copy-paste-ready 5 anchor.

Workflow Clarity

The four-step sequence (identify → format → propose and wait for approval → persist) is clear, and the approval gate acts as an explicit checkpoint before the state-changing write. It falls short of 5 because there is no post-persist verification or error-recovery loop (e.g., confirming the rule was stored or what to do on a failed write).

Progressive Disclosure

The skill is self-contained with no bundle files and well-organized sections (Trigger, Workflow, Format, Categories, Example, Guardrails, Output), so nothing needs external references. At ~69 body lines it exceeds the under-50-line simple-skill exception, and the categories table plus two example blocks could arguably live in a reference file, matching the "good structure; minor organization gaps" 4 anchor rather than 5.

Specificity

"Capture a correction or lesson as a persistent learning rule with category, mistake, and correction. Stores, categorises, and retrieves rules" lists multiple concrete actions covering the skill's full lifecycle, matching the comprehensive-coverage anchor. It is a clear fit for 5; score 4 would require minor coverage gaps, but capture, store, categorise, and retrieve leave none.

Completeness

It explicitly answers what ("Capture a correction or lesson as a persistent learning rule... Stores, categorises, and retrieves rules") and when ("Use after mistakes or when the user says 'remember this'...") with concrete trigger phrases, matching the 5 anchor exactly. A missing or weak 'when' clause would cap it at 3, which is not the case.

Trigger Term Quality

The description includes natural user phrasings — "remember this", "don't forget", "note this", "learn from this" — plus "after mistakes", giving comprehensive synonym coverage of how users would naturally request this. Score 4 would mean missing common variations, and none are absent.

Distinctiveness Conflict Risk

The learning-rule niche is clear, but triggers like "remember this" carry minor overlap risk with general memory/persistence skills, matching the "mostly distinct; minor overlap risk" anchor. It is not a 5 because those phrases are not uniquely bound to this skill, and not a 3 since the category/mistake/correction framing is distinctive.