Conciseness

The body is lean and assumes Claude's competence: it avoids explaining what abstractions or invariants are and lets templates carry the weight, with only minor prose that could be trimmed ('The move is simple: ...'). It is more efficient than score 3's 'includes some unnecessary explanation' but not the every-token-earns-its-place lean of score 5.

Actionability

It provides concrete fill-in templates (the Ritual, Mental Inlining Pass, Output Shape) and one illustrative .ts call site, but the guidance is design-thinking prompts rather than executable code or commands, and key decisions ('redesign above it', 'inline it') lack a concrete execution path. This matches the score-3 anchor of 'some concrete guidance but incomplete; missing key details', and is not the mostly-executable level of score 4.

Workflow Clarity

A clear sequence exists (Ritual -> Find Largest Unit -> Start From Ideal -> Mental Inlining -> Go Up One Level -> Asymmetric Check -> Decision Rules -> Output Shape), but redesigning a surface is a destructive/batch-style operation and there are no validation checkpoints or feedback loops (validate -> fix -> retry) before deleting the old constraint. Per the rubric's cap, a destructive skill without validation cannot score above 3.

Progressive Disclosure

With no bundle files present, structure rests on well-organized sections and one-level-deep cross-skill links ([greenfield-clean-breaks], [asymmetric-wins], etc.) that are clearly signaled and topical. It is good structure with minor organization gaps (the Related skills block sits before the workflow rather than at the end), placing it above score 3 but short of the cleanly-split overview-plus-references ideal of score 5.

Specificity

Names the domain ('current approach', 'cleaner design from first principles') and several concrete actions ('Compare', 'before editing'), but the actions stay at a design-strategy level rather than enumerating concrete operations. It sits clearly above score 3 (one-to-two concrete actions) yet short of the multi-action comprehensiveness of score 5.

Completeness

It explicitly answers both 'what' ('Compare a current approach with a cleaner design from first principles before editing') and 'when' with a concrete 'Use when' trigger clause listing three scenarios. This matches the score-5 anchor of clearly and explicitly answering what and when with concrete trigger phrases.

Trigger Term Quality

Natural phrases a developer would actually say ('an abstraction feels wrong', 'a fix becomes a band-aid', 'complexity spreads across layers') give good keyword coverage with clear synonyms, missing only a few common variations. It is stronger than score 3's 'some relevant keywords' but not the exhaustive synonym-and-extension coverage of score 5.

Distinctiveness Conflict Risk

The first-principles-redesign niche is mostly distinct and the triggers are specific, but it shares the 'redesign/refactor' surface with the related skills it cross-references (greenfield-clean-breaks, asymmetric-wins), giving minor overlap risk. It is clearer than score 3 but not the minimal-conflict niche of score 5.