Conciseness

At ~1300 lines the body extensively explains concepts Claude already knows — ARIA attribute basics, focus trapping, controlled vs. uncontrolled state, cloneElement semantics, TypeScript generics — plus padded docs-site artifacts ('URL: /accessibility', stray 'title:'/'description:' metadata, an embedded <Video> tag and <AuthorNote> blocks). There is real signal mixed in (data-slot/data-state conventions, the artifact taxonomy, naming conventions), which keeps it above the purely padded level 1 anchor, but the verbosity is substantial.

Actionability

Most guidance is concrete and executable: complete TSX for the composable Accordion build-up, the Radix Slot implementation with cva variants, useControllableState usage, and ComponentProps typing patterns, all copy-paste quality. Minor gaps — the Composition Root snippet omits imports, and the Data Attributes and Design Tokens sections defer to a 'react.mdc' section that is not part of this bundle — keep it below fully covered.

Workflow Clarity

There is no overall workflow: the body is a concatenation of eleven independent topic pages (Accessibility, asChild, Composition, Definitions, Polymorphism, State, Types, ...) with no sequence connecting them and no instruction on how to apply the material when building a component. Fragments of sequence exist (the 5-step Accordion walkthrough, the Definitions classification decision flow), matching the 'rough sequence present but many gaps' anchor rather than the 'steps missing or incoherent' one.

Progressive Disclosure

The skill is a monolithic single file with no references/, scripts/, or assets/ directories; content that clearly belongs in separate files (the full Accessibility page, the Polymorphism deep-dive, the Definitions glossary) is inlined. References that do exist are buried and dangling — 'see the Data Attribute Styling Patterns section in react.mdc' points to a file not in the bundle — leaving navigation effectively impossible.

Specificity

The description names the domain ('React component architecture') and a couple of concrete facets ('composable, accessible components with data attributes'), but it is a single topic clause rather than a list of multiple concrete actions, so coverage is not comprehensive. It matches the 'names domain and 1-2 concrete actions' anchor, not the 'several specific actions' anchor above.

Completeness

Both parts are present: the 'what' ('React component architecture for creating composable, accessible components with data attributes') and an explicit 'Use when creating/updating composable components' clause that even adds a negative boundary ('not for higher-level feature/page components'). It falls short of a 5 because the trigger phrases are less concrete than anchor examples like 'or when the user mentions PDFs, forms, or document extraction'.

Trigger Term Quality

Natural trigger terms like 'composable components', 'accessible components', 'data attributes', and 'creating/updating' cover how a user would plausibly phrase the need. Common variations a user might say — 'composition', 'compound components', 'polymorphic', 'asChild', 'headless' — are absent, which keeps it below the comprehensive synonym coverage of a 5.

Distinctiveness Conflict Risk

The scope is a clear niche (composable React component construction) with an explicit exclusion of feature/page-level components, making it mostly distinct from general React or design-system skills. Minor overlap risk remains with sibling skills about general component building or accessibility, keeping it below the 'clear niche with minimal conflict risk' anchor.