Conciseness

The body is lean and assumes Claude's competence: a two-sentence rationale ("Writing code is cheap for you... Counter it by borrowing a human maintainer's fatigue") followed by five terse bullets and a closing prime directive, with no padding or explanations of concepts Claude already knows — matching 'every token earns its place'.

Actionability

Each bullet gives concrete, directive guidance with specifics — "more than 3 files or layers", "Put it behind one source of truth and pass the result as a simple flag", "Fewer lines beat 'elegant' boilerplate" — which is actionable for an instruction-only skill. It falls just short of fully executable-equivalent guidance because no worked example shows the heuristics applied, fitting 'Mostly executable guidance; concrete code or commands with minor gaps'.

Workflow Clarity

This is a simple, single-purpose skill under 50 lines whose single action is unambiguous — each bullet is a self-contained decision rule, so the simple-skill exception applies. There are no destructive or batch operations, so the validation cap does not apply.

Progressive Disclosure

The skill is under 50 lines with no need for external references, and the content is well-organized into a header, framing intro, bulleted principles, and a closing prime directive — matching the guideline that such skills can score 5 with just well-organized sections. No bundle files exist, so there are no buried or nested references to penalize.

Specificity

The description names its domain and 1-2 concrete actions — "Bias toward deletion and the smallest change that solves the problem" — matching the anchor 'Names domain and 1-2 concrete actions, but not comprehensive'. It does not list several specific actions, so the score-4 anchor's coverage is not met.

Completeness

It explicitly answers both: when ("Apply when refactoring, evaluating diff size, or tempted to add abstractions, layers, or signal threading") and what ("Bias toward deletion and the smallest change that solves the problem"), with concrete trigger phrases — matching the 5 anchor. The cap-3 guideline does not apply since an explicit 'Apply when' trigger clause is present.

Trigger Term Quality

Natural terms like "refactoring", "evaluating diff size", "abstractions", "layers", and "signal threading" give good keyword coverage a user would plausibly say, but common synonyms such as 'simplify', 'clean up code', or 'over-engineering' are missing — fitting between the 3 and 4 anchors, noticeably above the midpoint.

Distinctiveness Conflict Risk

The over-engineering-discipline niche is mostly distinct with concrete triggers (diff size, signal threading), but the broad term "refactoring" carries minor overlap risk with general refactoring or simplification skills — matching 'Mostly distinct; minor overlap risk with closely related skills'.