Conciseness

The body is lean and assumes competence — no explanation of what Storybook is, and each step is a single directive. However, the time-sensitive version threshold ('If it is below 11.0... to get the 11.0 alpha') is embedded in the main instruction rather than a deprecated/old-patterns section, which the guidelines say should penalize conciseness; this fits 'Efficient; minor instances... that could be trimmed' rather than the flawless top anchor.

Actionability

Every step is a copy-paste-ready command: 'npm view create-storybook version', 'npm create storybook@next' / 'npm create storybook@latest', and the pnpm equivalent, plus a concrete version-check rule deciding which to run. This matches 'Fully executable; copy-paste ready code or commands; specific examples cover the common cases'.

Workflow Clarity

The sequence is clear and gated by explicit checkpoints: an already-installed guard ('storybook dependency in package.json, or a .storybook/ directory') that redirects to /storybook-setup, a version check that branches between @next and @latest, and a final handoff to project-specific configuration. This is a simple, non-destructive skill where the actions are unambiguous, matching the top anchor under the simple-skill allowance.

Progressive Disclosure

The skill is under 50 lines with no content that warrants external reference files (none exist in the bundle), and the body is well organized as a guard clause plus two numbered steps that delegate detail to the /storybook-setup skill. Per the simple-skill guideline, this earns the top anchor on well-organized sections alone.

Specificity

The description names the domain and a single concrete action — 'adding Storybook to a project' — but lists no further capabilities (e.g., scaffolding config, choosing a version). This matches the anchor 'Names domain and 1-2 concrete actions, but not comprehensive'; it is above 'Names the domain but actions are minimal or generic' because 'adding Storybook' is a concrete act, but below 'Lists several specific actions' since only one action appears.

Completeness

The 'when' is explicit and well-scoped ('Use when adding Storybook to a project that does not have Storybook configured yet'), and a 'what' is present but thin — 'adding Storybook' implies installing it without stating concrete outcomes. This matches 'Has both what and when; when could be more explicit or specific' inverted (the what is the weaker half), and falls short of 5 because there is no concrete capability statement alongside the trigger.

Trigger Term Quality

'adding Storybook' is a natural phrase a user would say, and the tool name itself is a strong trigger, but common variations like 'set up Storybook', 'install Storybook', 'configure Storybook', or 'stories'/'UI components' are absent. This fits 'Some relevant keywords but missing common variations or synonyms' rather than 'Good keyword coverage', which expects several natural terms.

Distinctiveness Conflict Risk

The description targets a clearly named tool and adds an explicit scope condition ('does not have Storybook configured yet') that distinguishes it from a configuration/setup skill. This is a clear niche with distinct triggers and minimal conflict risk, matching the top anchor; it is not score 4 because the distinguishing condition is stated explicitly rather than merely implied.