Conciseness

The body is dense operational content (paths, gates, mode tables) with essentially no explanation of concepts Claude already knows, fitting 'efficient; minor instances of over-explanation that could be trimmed'. The recommendation to defer mechanical CRUDs to `nicolify-ux-designer` appears three times (role section, Mode Detection table, Common Mistakes), and the persona_summary/problem_statement blocks are slightly padded. Not score 5 because of these minor redundancies; not score 3 since nothing is unnecessary explanation, just light duplication.

Actionability

Every phase carries concrete, executable guidance: literal glob patterns ('frontend/src/features/{domain}/components/**/*.tsx', 'frontend/src/components/ui/*.tsx'), copy-paste Spanish question scripts, an exact HTML preview recipe ('/tmp/ux-preview-{timestamp}.html', 'https://cdn.tailwindcss.com', 'xdg-open'), and specified output formats deferred to real reference files. This is an instruction-only skill and the guidance is fully actionable with common cases covered, matching the score-5 anchor.

Workflow Clarity

The 7 phases are explicitly sequenced with a Quick Reference table, mode detection before entry, hard gates ('Do NOT proceed to Phase 2 without answers to at least questions 1 and 2'), a Phase 7 verification step (globbing real component names before writing the spec), back-navigation feedback loops ('volvamos a las propuestas'), and a Common Mistakes checklist — matching the score-5 anchor of clear sequence, explicit validation, feedback loops, and checklists.

Progressive Disclosure

The body is a workflow overview that loads five real, one-level-deep reference files on demand at specific phases ('Load `references/proposal-format.md` and `references/ascii-mockup-guide.md` with `Read`'), all of which exist in the bundle; cross-references inside the reference files point only to sibling files, so there is no 2+ level nesting. Bulk formats (proposal format, ASCII conventions, UI-SPEC template, tokens) are appropriately split out, matching the score-5 anchor.

Specificity

The description lists multiple concrete actions covering the full workflow: 'defines user personas, frames problems, audits existing components (Shadcn UI + Tailwind CSS v4 + FSD architecture), researches SaaS UI patterns, proposes multiple distinct layout paradigms with ASCII wireframes and HTML mockups, iterates through dialogue, and delivers a complete UI-SPEC.md with component trees, data flow, responsive behavior, and interaction patterns'. Coverage is comprehensive with no vague padding, matching the score-5 anchor rather than the minor-gaps anchor at 4.

Completeness

Both questions are explicitly answered: 'Use when designing new screens, redesigning existing UI, creating visual concepts, or improving interfaces in Nicolify' gives the when, and the 7-phase enumeration with the UI-SPEC.md deliverable gives the what. This matches the score-5 anchor exactly; it is above the score-4 anchor because the when-clause is explicit and specific, not merely present.

Trigger Term Quality

An explicit 'Triggers:' list covers natural phrases a user would actually say in both languages: 'diseña', 'rediseña', 'nueva pantalla', 'concepto visual', 'propuesta de diseño', 'UX', 'layout', 'prototipo', 'mejora la interfaz', 'wireframe', 'mockup', 'esquema de color', 'componentes de pantalla'. Synonyms and variations are comprehensively covered; not the score-4 anchor since no obviously missing natural terms remain.

Distinctiveness Conflict Risk

Scoping to 'in Nicolify' and to creative screen design gives a clear niche, but the body itself acknowledges a closely related sibling ('nicolify-ux-designer' agent for mechanical CRUDs) that the description does not distinguish from, and terms like 'UX', 'layout', 'mockup' are somewhat broad. This fits 'mostly distinct; minor overlap risk with closely related skills' (4) rather than minimal conflict risk (5).