Conciseness

The body is dense with project-specific, non-inferable conventions (import order, type-loader paths, category table, Storybook helpers) with almost no explanation of concepts Claude already knows — matching anchor 4 ('Efficient; minor instances of over-explanation that could be trimmed'). It is not anchor 5: the ~80-line Complete Example largely restates patterns already shown in Steps 2–4, and the repeated fenced-code-block scaffolding around each demo pattern adds trimmable tokens.

Actionability

Guidance is fully executable: exact file paths ('static/app/components/core/<category>/<component>/index.tsx'), a literal import-order block, concrete frontmatter YAML, copy-paste demo/SideBySide/See Also templates, and a checklist of verifiable conditions. This matches anchor 5 ('Fully executable; copy-paste ready code or commands; specific examples cover the common cases') — the Complete Example is nearly a working Alert stories.mdx; anchor 4 would require missing key details, and none are evident.

Workflow Clarity

Steps are clearly sequenced (Gather editorial content → Locate component → Frontmatter → Imports → Content → Props table) with an explicit verification Checklist ('Every <Storybook.Demo> is immediately followed by a matching code block', etc.) and recovery guidance ('If the file already exists, read it first and update rather than overwrite'). This matches anchor 5 ('Clear sequence with explicit validation steps; ... checklists for complex processes'); the operation is not destructive/batch, so the workflow-clarity cap of 3 does not apply, and anchor 4 would require missing checkpoints that are in fact present.

Progressive Disclosure

The skill is a single well-organized file with clear step-level headers and easy navigation, matching anchor 4 ('Good structure; most content is appropriately placed; minor organization gaps'). It is not anchor 5: there are no one-level-deep reference files, and ~350 lines inline material that could be split out (the Complete Example, the demo-layout/helper reference tables, and the category table are natural references/ candidates). It is above anchor 3, whose 'content that should be separate is inline' describes bulk misplacement rather than the minor gaps present here.

Specificity

The description lists multiple concrete actions — "Create or update component documentation in Sentry's MDX stories format", "Generates structured MDX with live demos, accessibility guidance, and auto-generated API docs from TypeScript types" — comprehensively covering what the skill does. It matches the anchor 'Lists multiple specific concrete actions; comprehensive coverage' and exceeds anchor 4, which is for actions with minor coverage gaps; no capability of the skill is left unmentioned.

Completeness

It explicitly answers both questions: what ("Create or update component documentation in Sentry's MDX stories format... Generates structured MDX with live demos, accessibility guidance, and auto-generated API docs") and when ("Use when asked to 'document a component'..."), with concrete trigger phrases. This mirrors the anchor-5 example structure exactly; a missing or weak 'Use when' clause would have capped it at 3, but the when-clause is explicit and multi-trigger.

Trigger Term Quality

Trigger phrases are natural user phrasings with synonyms and file extensions: "document a component", "add stories", "write component docs", "create an mdx file", "add a stories.mdx", "document a design system component". This matches the anchor-5 pattern ('PDF files, PDFs, forms, document extraction, .pdf') — including the .mdx/stories.mdx extension variants — and is well above anchor 4's 'a few natural terms missing'.

Distinctiveness Conflict Risk

The description carves a clear niche — Sentry's MDX stories format for design system components — with triggers ('stories.mdx', 'add stories', 'component docs') unlikely to fire for unrelated documentation skills. It matches anchor 5 ('Clear niche with distinct triggers; minimal conflict risk'); anchor 4 would require noticeable overlap with closely related skills, which is not the case here.