Conciseness

The body is dense and operational — tables, numbered rules, and copy-paste templates with almost no explanation of concepts Claude already knows. Minor redundancy keeps it below 5: the skills-to-load list appears in both the frontmatter and the body ('Skills cargados (HARD GATE)'), and the 'Live verification' python http.server snippet repeats the one already shown in Step 2.

Actionability

Fully executable guidance throughout: exact input paths ('frontend/src/components/ui/'), a runnable preview command ('python3 -m http.server 8888'), a ready-to-send delta-spec.md template, per-iteration output message templates, and a feedback→action table mapping each Chris response to a concrete action. Covers the common cases copy-paste ready.

Workflow Clarity

Steps 1–6 are clearly sequenced with explicit validation checkpoints: Step 1 validates scope and escalates to /po if ambiguous, Step 3 defines a feedback loop ('NUNCA rebuilds from scratch', escalate on out-of-scope changes) that loops 'hasta Chris dice está bien', Step 5 routes edge cases to /po ratification, and 'Live verification' gates declaring done. This matches the anchor with explicit validation steps and error-recovery feedback loops.

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ are absent), and the ~165-line skill is organized into clear one-level sections with the single external pointer ('docs/specs/templates/02-design-ui-template.md') clearly signaled. At this length, some inline material (e.g., the full mockup rules or the 02-design-ui.md field checklist) could be split into reference files, placing it at 'good structure, minor organization gaps' rather than fully appropriate splitting.

Specificity

Lists multiple concrete actions with named artifacts — 'Toma 01-spec.md ... y produce 02-design-ui.md + mockups HTML', 'propone delta-spec.md, /po ratifica' — giving comprehensive coverage of the workflow. However the guideline penalizes non-third-person voice by 1 point on this dimension: 'Cargá skills ...' is second-person imperative (voseo), pulling it down from a clear 5.

Completeness

Explicitly answers both: 'what' ('Toma 01-spec.md ... y produce 02-design-ui.md + mockups HTML', iterative dialogue until approval, delta-spec escalation) and 'when' ('Activa cuando user dice: ...' with concrete trigger phrases). This matches the 5 anchor — clear what AND when with concrete triggers; not 4 because the 'when' clause is fully explicit rather than merely present.

Trigger Term Quality

Includes natural trigger phrases users would say: '/ux-ui', 'diseñemos la pantalla', 'mockup', 'wireframe', 'rediseña', 'la UI de X' — good coverage. A few natural synonyms are missing (e.g., 'diseño', 'pantalla', 'interfaz', English 'UI design'), so it sits just below the comprehensive 5 anchor.

Distinctiveness Conflict Risk

The Nicolify-specific pipeline (01-spec.md → 02-design-ui.md, Chris iteration, /po ratification) carves a clear niche with minimal conflict risk. Generic design terms like 'mockup' and 'wireframe' could overlap with other design-related skills, keeping it at 'mostly distinct' rather than the 5 anchor.