Conciseness

The body is lean (~33 lines), assumes Claude's knowledge of Go embed directives and testing, and avoids explaining what skills or PDFs are; every line earns its place. Not below 5 because there is no detectable padding or redundant explanation.

Actionability

Provides concrete file paths (internal/skills/builtin/<skill-name>/SKILL.md), exact build/test commands (go build . && go test ./internal/skills/...), and a precise embed directive (//go:embed builtin/*). Score capped below 5 because it is instruction-only with no executable code block, and the "add a test assertion" step is described but not shown concretely.

Workflow Clarity

The "Adding a New Builtin Skill" section is a clear 4-step numbered sequence culminating in a build-and-test verification command (step 4). Not a 5 because there is no explicit feedback loop describing what to do if the build/test fails, though the operation is non-destructive so the missing feedback loop is a minor gap rather than a hard cap.

Progressive Disclosure

Content is under 50 lines, single-purpose, with well-organized section headers (How It Works, Adding a New Builtin Skill, Existing Builtin Skills) and no need for external references; per the simple-skills note this qualifies for a 5. No bundle files exist, so no nested-reference risk.

Specificity

Names the domain (Crush builtin skills) and several concrete actions — "creating a new builtin skill", "editing an existing builtin skill", "understand how the embedded skill system works" — with only minor coverage gaps. Not a 5 because it lacks additional specific sub-tasks like discovery testing or embedding details explicitly as capabilities.

Completeness

Clearly answers "what" (creating/editing/understanding builtin skills) and explicitly answers "when" via the "Use when ... or when the user needs to understand" trigger clause with concrete scenarios. Not below 5 because both what and when are explicit and concrete.

Trigger Term Quality

Includes natural trigger phrases such as "Use when creating", "editing an existing builtin skill", and "understand how the embedded skill system works" that a user might say, but misses common synonyms or variations. Not a 5 because coverage of alternative phrasings is thin; not a 3 because the present terms are genuinely natural rather than generic.

Distinctiveness Conflict Risk

The niche is tightly scoped to Crush's embedded skill system at internal/skills/builtin/, with triggers unlikely to fire for unrelated skills. Minimal conflict risk because the path and "builtin skill" framing are specific to this single domain.