Conciseness

The body is dense and operational — no sections explain concepts Claude already knows, and the troubleshooting table and constraints are pure signal. It falls short of the lean anchor-5 because runtime-quality-checklist is mandated twice (step 7 and 'Project invariants'), the playwright-expert deferral is stated twice in the E2E section with an inline migration date ('SSoT migrada 2026-05-04') that earns nothing, which is the anchor-4 pattern of minor instances that could be trimmed.

Actionability

Fully executable guidance throughout: a copy-paste scaffold command ('python .claude/skills/frontend-expert/scripts/scaffold_feature.py <nombre-en-kebab-case> --layer features --path frontend/src'), concrete test/run commands ('cd frontend && npm run test:e2e:smoke', 'docker compose up -d'), explicit import alias rules ('./ui/MiComponente' vs '@/features/other'), and worked placement examples ('features/sales/components/lead-profile.tsx'). Matches the anchor-5 'copy-paste ready commands; specific examples cover the common cases'.

Workflow Clarity

The 8-step SOP is clearly sequenced with explicit validation checkpoints and feedback loops: TDD RED gate ('El test debe fallar (RED)'), a stop-and-confirm human checkpoint ('Detente si el módulo no existe en INDEX — propón nombre y propósito, espera confirmación'), a mandatory pre-commit quality checklist, and a live-verification gate before marking a PR shipped, plus a troubleshooting table for error recovery. This is the anchor-5 pattern of 'explicit validation steps; feedback loops; checklists'.

Progressive Disclosure

All links are one level deep, every referenced file exists in the bundle (references/, scripts/scaffold_feature.py, assets/templates/component.tsx), and reference sections state when to read each file ('lee solo cuando necesites'). It stays at anchor 4 rather than 5 because the references are split across two sections ('Referencias' and 'Project invariants') with overlapping entries (runtime-quality-checklist appears in both), and link paths carry a 'frontend-expert/' prefix that does not match the bundle's actual layout — minor organization gaps per the anchor-4 wording.

Specificity

Names the exact stack ("Next.js 16 App Router + React 19 + Tailwind + Shadcn UI") and lists multiple concrete actions — "creating responsive layouts, building interactive forms/dashboards, implementing dynamic routes, integrating Shadcn UI components, refactoring UI architecture, configuring Tailwind theming, wiring React Query hooks to backend APIs, or solving Server/Client Component boundaries" — covering the frontend workflow comprehensively. Anchor 4 ('several specific actions; minor gaps') is exceeded because no significant capability area of the stated scope is missing.

Completeness

Explicitly answers both 'what' ("Frontend specialist for Next.js 16 App Router + React 19 + Tailwind + Shadcn UI using Feature-Sliced Design Lite") and 'when' with a literal "Use when:" clause listing concrete scenarios plus a separate Triggers list. This mirrors the anchor-5 example structure exactly; the missing-when caps (3) and weak-when (4) anchors are clearly inapplicable.

Trigger Term Quality

Comprehensive natural-language coverage with synonyms in both the capability list and explicit trigger phrases users would actually say: 'nueva funcionalidad', 'modifica el front', 'crea un componente', 'refactoriza la UI', 'implementa layout', 'configura rutas', 'integra con la API', 'arregla el estilo'. These match the anchor-5 pattern of full synonym coverage; anchor 4 ('a few natural terms missing') does not apply since common user phrasings for this bilingual workflow are represented.

Distinctiveness Conflict Risk

A clear niche is staked out (specific framework versions plus a stated architectural methodology, "domain-grouped features/, not traditional layers") with triggers distinct from adjacent skills like playwright-expert (E2E) or backend skills. Only trivial overlap risk with a hypothetical generic React skill; matches the 'clear niche with distinct triggers' anchor rather than the 4 anchor's 'minor overlap risk with closely related skills'.