Conciseness

The body is lean and assumes Claude's competence — no explanation of what a CMS, hook, or API is; every sentence carries EmDash-specific contracts (e.g., "Patch does not imply read", "decoded request/response bodies limited to 8 MiB"). The capability table rows each state a distinct grant with no padding.

Actionability

The scaffold workflow is fully executable (copy-paste `pnpm dlx @emdash-cms/plugin-cli init my-plugin` plus a complete `src/plugin.ts` example), and the test section names concrete host functions. Minor gaps remain: routes, MCP tools, and admin UI sections give precise directive prose but no inline executable examples, deferring to references.

Workflow Clarity

Sections follow a coherent lifecycle (choose format → scaffold → declare access → routes/hooks/UI → runner parity → test) with explicit decision guidance ("Use a sandboxed plugin unless...") and a dedicated test-boundary section distinguishing two test hosts. However, there is no explicit validate-then-proceed loop or error-recovery checkpoint inline, keeping it below a 5.

Progressive Disclosure

A ~130-line overview with all 12 referenced files verified to exist, one level deep in references/ (only sibling cross-links, no nesting), each clearly signaled at the point of use ("Read [Hooks](./references/hooks.md)") plus a consolidated References index. Detail is appropriately offloaded — references total ~2300 lines while the body stays an overview.

Specificity

The description lists several specific capabilities ("sandboxed hooks, routes, storage, content and media APIs, MCP tools, and declarative admin UI, or native React and Astro extensions"), but omits notable parts of the skill's coverage such as testing and publishing, leaving minor gaps rather than the comprehensiveness of a 5.

Completeness

Both what ("Create EmDash CMS plugins with sandboxed hooks, routes, storage...") and when ("Use when scaffolding or implementing an EmDash plugin") are explicitly stated in third person, but the when-clause covers only creation triggers and could be more specific about secondary scenarios (extending an existing plugin, adding an MCP tool), matching anchor 4 rather than 5.

Trigger Term Quality

Good keyword coverage: users would naturally say "EmDash plugin", "scaffold", "implement", "MCP tools", "hooks", "admin UI". A few natural terms are missing (e.g., "Block Kit", "manifest", file extensions like .jsonc), so it does not reach the synonym/extension comprehensiveness of a 5.

Distinctiveness Conflict Risk

"EmDash CMS" names a clear niche with distinct trigger phrases ("scaffolding or implementing an EmDash plugin"), so overlap risk with other skills is minimal — no generic phrasing that would fire for unrelated tasks.