Conciseness

The body is ~150 words with zero padding: 'The product is the experience. Every technical decision either helps or hurts it.' No concepts Claude already knows are explained, and every line is a directive or a needed clarification — matching the 'lean and efficient; every token earns its place' anchor.

Actionability

The five bullets are concrete decision rules with specific parentheticals ('design decisions are cheaper in throwaway HTML than production code', 'transitions, alignment, spacing, feedback, error states'), and the core rule is explicit: 'When implementation convenience conflicts with user delight, choose delight.' It falls short of anchor 5 because no worked example shows the principle applied to a real tradeoff, leaving minor gaps in covering common cases.

Workflow Clarity

This is a single-purpose principle skill under 50 lines with one unambiguous action (choose delight over convenience, applying the five heuristics), so the simple-skill exception applies and workflow clarity scores 5. It involves no destructive or batch operations that would require validation checkpoints.

Progressive Disclosure

The skill is under 50 lines with no need for external references (none exist in the bundle), and it is well organized: a title, a one-line thesis, five scannable bullets, a definition of 'the user', and a boundary note distinguishing sequence vs. target. Per the rubric guideline this earns a 5 on organization alone.

Specificity

It names the domain ('product, UX, or feature-scope tradeoffs') and two directive actions ('Choose user delight over implementation convenience', 'ship fewer polished features over more rough ones'), matching the anchor for domain plus 1-2 concrete actions. It is not a 4 because the two clauses are variations of a single decision rule rather than several distinct actions.

Completeness

Both halves are explicit: what ('Choose user delight over implementation convenience; ship fewer polished features over more rough ones') and when ('Apply when product, UX, or feature-scope tradeoffs come up') with concrete trigger contexts. The 'when' clause is explicit and specific, so this is not the anchor-4 case of an adequate-but-vaguer trigger.

Trigger Term Quality

'product, UX, or feature-scope tradeoffs', 'user delight', and 'polished' are terms a user would naturally say when this skill applies — good coverage with only a few natural terms missing. It is not a 5 because common synonyms and variations like 'scope creep', 'MVP', or 'cutting features' are absent.

Distinctiveness Conflict Risk

The niche — experience-first product and feature-scope decisions — is clearly staked out and distinct from tooling or format skills, with only minor overlap risk against closely related product-strategy or design skills. It is not a 5 because the trigger domain ('product, UX... tradeoffs') is broad enough that a sibling product-thinking skill could plausibly compete.