Conciseness

The body is lean and assumes competence — the Quick start is a single tool call with expected output, and the two-sentence 'Why' explains skill-specific mechanics (confidence strengthening/decay) Claude would not know. Not a 5 because the Checklist section largely restates the Workflow steps, so those tokens are redundant trimmable material.

Actionability

Guidance is mostly executable: a concrete Quick start call with all parameters (content, context, confidence, project), expected output, explicit confidence heuristics (0.7 for user correction, 0.5 for self-observed), and WRONG/RIGHT content examples. Minor gaps keep it from 5: the recall and delete calls are described but never shown, and the save example uses an informal unquoted-key format rather than a precise invocation.

Workflow Clarity

Six clearly sequenced steps with an explicit validation checkpoint — step 6 'Confirm with the rule as saved, so the user can veto a bad distillation' — plus a reinforcing checklist and a WRONG/RIGHT contrast, matching the 5 anchor's sequence-with-explicit-validation-and-checklist pattern. The recall side is also sequenced (query by task type, ranked by confidence and recency).

Progressive Disclosure

Good structure for a short skill: well-organized sections with the rare failure path pushed to a clearly signaled one-level reference ('See [TROUBLESHOOTING.md](TROUBLESHOOTING.md) if memory_lesson_save is not available'). Not a 5 because that referenced file does not exist in the bundle (no references/, scripts/, or assets/ directories and no TROUBLESHOOTING.md anywhere), leaving a dangling navigation point rather than well-signaled, resolvable references.

Specificity

The description names the domain and two concrete actions — "Save a correction or hard-won rule as a confidence-weighted lesson" and "resurfaces before similar work" — but the mechanism stays abstract (no mention of how it resurfaces or the save/recall operations). This matches the anchor 'Names domain and 1-2 concrete actions, but not comprehensive' rather than 4, which expects several specific actions with only minor coverage gaps.

Completeness

It explicitly answers both questions: what ("Save a correction or hard-won rule as a confidence-weighted lesson that resurfaces before similar work") and when ("Use when the user corrects your approach, says 'learn this', 'always' or 'never do X', or you notice yourself repeating a past mistake"). This mirrors the 5-anchor example's what-plus-concrete-trigger-phrase structure; a 4 would require the 'when' to be less explicit, which it is not.

Trigger Term Quality

It quotes natural phrases users actually say — "says 'learn this', 'always' or 'never do X'", "the user corrects your approach", "repeating a past mistake" — giving good keyword coverage. Not a 5 because common variants like "remember this", "don't do that again", or "next time" are missing.

Distinctiveness Conflict Risk

The "confidence-weighted lesson" framing and correction-focused triggers carve a fairly distinct niche, but phrases like "learn this" could plausibly also invoke a general memory/remember skill, so minor overlap risk with closely related skills remains — a 4, not the clear-distinct-triggers 5.