Conciseness

The body is dense and mostly earns its tokens: rule tables, Before/After pairs, a modal ladder, and a self-check with literal search patterns ('\'ll\'', 'has been', ';'), none of which re-explains what Claude already knows. It is not a 5 because some material is editorial padding or could be trimmed — the 'tested — an agent without this file cited Rule 3.1' anecdote, the trademark/disclaimer paragraph, and the full worked Before/After example at the end add length beyond the operating minimum. It is clearly above the 'mostly efficient but includes some unnecessary explanation' (3) anchor.

Actionability

Guidance is fully executable throughout: numbered task sequence, a mode-selection table, a classification table with word limits, per-rule numbered instructions, a modal ladder mapping 'should/may/would' to exact rewrites, a slop-to-simple substitution table with concrete replacements, searchable self-check patterns, and Untouchables scoping what never gets edited. As an instruction-only skill with concrete, specific guidance throughout, it matches the top anchor.

Workflow Clarity

'Your Task' gives a clear six-step sequence (select mode → classify → fix vocabulary → apply rules → run self-check → never touch code) with an explicit validation gate ('Run the self-check before you deliver. This step is not optional') and a fix-what-you-find-then-deliver feedback loop. This matches the 'clear sequence with explicit validation steps; feedback loops; checklists' anchor, and the checklist reference provides the recovery detail.

Progressive Disclosure

Both references exist, are one level deep, and are clearly signaled twice with stated purposes ('references/checklist.md — full verification pass... for check mode and final audits'; 'references/use-cases.md — long-form adaptations: error messages, runbooks, incident reports, commits, UI copy, i18n'). However, the main body is ~330 lines and some inline material — the known part-of-speech rulings table and the ~30-row slop substitution table — is lookup material that belongs in a reference file, which keeps it below the 'content appropriately split; easy navigation' (5) anchor while clearly above 'some structure but... content that should be separate is inline' (3).

Specificity

Concrete actions are named precisely ('Write or rewrite technical text with the rules of ASD-STE100', 'Enforces the standard's 53 rules') and enumerate the mechanics ('20/25-word sentence limits, one word one meaning, simple tenses, active voice, condition before command') plus a full list of target document types. This matches the 'lists multiple specific concrete actions; comprehensive coverage' anchor, and stays in third person ('Enforces...') as required.

Completeness

It explicitly answers both questions: what ('Write or rewrite technical text with the rules of ASD-STE100... so it is clear, unambiguous, and free of AI slop') and when ('Use for documentation, READMEs...'; 'Also use when the user says "STE"...'). Both are concrete and explicit, matching the 'clearly and explicitly answers both what AND when with concrete trigger phrases' anchor.

Trigger Term Quality

Covers the formal names users would say ('STE', 'Simplified Technical English', 'ASD-STE100') plus natural colloquial phrases ('de-slop', 'make this readable', 'write for non-native readers', 'docs that translate well') and a dozen document-type keywords (READMEs, runbooks, incident reports, release notes). This is comprehensive natural-term coverage with synonyms, matching the top anchor; nothing common is missing.

Distinctiveness Conflict Risk

The controlled-language niche is clear and the STE/ASD-STE100/de-slop triggers are distinctive, but generic phrases like 'make this readable' could also fire for a general editing or prose-polish skill. This sits between 'clear niche with distinct triggers; minimal conflict risk' (5) and 'mostly distinct; minor overlap risk with closely related skills' (4) — the generic triggers tip it to 4.