Conciseness

The body is lean — tables, a CLI cheat sheet, and a config snippet — with only two trimmable instances: the time-sensitive stamp "Based on Vite v8.3.1 (Rolldown-powered), generated at 2026-09-25" (not in a deprecated section) and an intro sentence explaining what Vite is. Not 5 because the version/date line triggers the time-sensitivity penalty; not 3 because only ~2 of ~60 lines are unnecessary.

Actionability

Provides executable CLI commands ("vite build --ssr") and a copy-paste-ready defineConfig snippet covering the common case, plus a concrete plugin list. Not 5 because inline guidance has minor gaps — no plugin-authoring or environment API example, with the bulk deferred to references; not 3 because what is present is fully executable, not pseudocode.

Workflow Clarity

This is a reference/lookup skill with no multi-step process; the single action — find the topic in the tables and read the one linked reference — is unambiguous, satisfying the simple-skill exception. No destructive or batch operations exist, so no validation cap applies. Not 4 because navigation leaves no ambiguity about where any topic lives.

Progressive Disclosure

Clear overview with well-signaled one-level-deep references: all six bundle files (core-config, core-features, core-plugin-api, build-and-ssr, environment-api, rolldown-migration) exist and are linked from descriptive tables, and the only cross-link (rolldown-migration → core-config) is lateral, not nested. Not 4 because the split is appropriate and navigation is trivial.

Specificity

Lists several specific capability areas — "Vite build tool configuration, plugin API, SSR, and Vite 8 Rolldown migration" — with minor gaps (no dev-server/HMR topics) and noun phrases rather than concrete action verbs. Not 5 because coverage is not comprehensive and no explicit actions are stated; not 3 because it goes well beyond naming the domain with 1-2 items.

Completeness

Explicitly answers both what ("Vite build tool configuration, plugin API, SSR, and Vite 8 Rolldown migration") and when ("Use when working with Vite projects, vite.config.ts, Vite plugins, or building libraries/SSR apps with Vite") with concrete trigger phrases. Not 4 because the 'when' clause is already explicit and specific, matching the top anchor.

Trigger Term Quality

Good natural keyword coverage: "Vite projects, vite.config.ts, Vite plugins, or building libraries/SSR apps with Vite" are phrases users would naturally say. Not 5 because common variations like "frontend build", "dev server", "HMR", or file extensions beyond vite.config.ts are missing.

Distinctiveness Conflict Risk

Clear niche with distinct triggers — "vite.config.ts" and "Vite plugins" are unambiguously Vite-specific, so overlap with generic build-tool or bundler skills is minimal. Not 4 because no closely related skill would plausibly capture these triggers.