Conciseness

The body is a dense, project-specific house-style manual: rendering rules ("The app splits a guide into sections in `TextUtils.getSections`"), a wording table, banned words, and reusable templates, with no padding or explanations of concepts Claude already knows. Every token carries a rule Claude could not derive on its own, matching the lean score-5 anchor rather than the minor-trimming score-4 anchor.

Actionability

Guidance is fully executable: copy-paste procedure and reusable-section templates, exact verification commands (grep/xxd checks that "complete when none of them print anything"), and a precise wording table ("`Tap the **+** button in the bottom-right corner.`"). This matches the score-5 anchor of copy-paste-ready commands covering common cases.

Workflow Clarity

The Workflow section gives a clear six-step sequence with an explicit validation checkpoint ("This step is complete when none of them print anything") plus a follow-up reading confirmation of lead-ins, numbering, and cross-references. The completion criterion defines a validate-fix-retry loop, matching the score-5 anchor; it exceeds score 4 because validation is explicit and specific rather than a vague "verify output".

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ are absent), so all content is inline in a clearly sectioned 149-line body with descriptive headings that make navigation easy. It sits at score 4 rather than 5 because there are no well-signaled one-level-deep references — the wording table and reusable-section templates are reference-style material that could be split into a separate file.

Specificity

Concrete actions ("Write or edit Trail Sense tool user guides") target an exact artifact ("guides/en-US/guide_tool_*.txt") and enumerate the specific style dimensions covered ("task-based headings, numbered procedures, warning callouts, and consistent UI wording"). Coverage is comprehensive rather than having the minor gaps that define the score-4 anchor.

Completeness

The description explicitly answers "what" (write or edit Trail Sense tool user guides in the established house style, with specifics) and "when" via an explicit "Use when adding a user guide, documenting a new or changed feature, or reviewing guide wording" clause with concrete triggers. This matches the score-5 anchor; it is above score 4 because the "when" is specific rather than generic.

Trigger Term Quality

Natural trigger phrases are present ("adding a user guide", "documenting a new or changed feature", "reviewing guide wording") and would be said by users needing this skill. However, common synonyms such as "documentation", "help text", or "docs" are missing, so it does not meet the comprehensive-synonyms bar of the score-5 anchor.

Distinctiveness Conflict Risk

It names a unique application ("Trail Sense"), an exact file path pattern, and a distinct task domain (tool user guides in house style), giving it a clear niche with minimal conflict risk. It would not plausibly trigger for any other skill.