Conciseness

Every rule is skill-specific editorial policy with no padding about concepts Claude already knows, but the ~360-line body states nearly every rule twice: once in its prose section (e.g. 'Em dashes and en dashes', "Ban this framing ... 'instead of X', 'we renamed'") and again in the Red flags table ('Reaching for an em dash', "'Unlike the old X, this now...' / 'we renamed X to Y'"). The duplication is systematic and the multi-part bad/good example blocks could be tightened, matching the 'mostly efficient but could be tightened' anchor.

Actionability

The guidance is fully concrete and executable for an instruction-only skill: exact search paths ('Check `docs/` first, then `documentation/`, `content/docs/`, `site/`, `website/docs/`'), copy-paste tab markup ('<!-- ::start:tabs variant="package-manager" mode="install" -->'), explicit prerequisite paths ('.claude/skills/simple-english/SKILL.md'), paired bad/good examples for each rule, and fallback instructions for every gap ('If there is no page like the one you are about to write, read the closest one you can find and match it').

Workflow Clarity

The two-phase workflow is clearly sequenced (flow diagram, then 'Find the docs first' steps, then Phase 1 reader planning, then Phase 2 writing) with explicit validation checkpoints and feedback loops: 'Before you call a page done, search your own added text for `—`, `–`, `×`, and `·`. If a hit survived, you rationalized it. Fix it.', followed by the `simple-english` self-check, plus stop conditions ('If either file is missing, stop and tell the user'). The Red flags table serves as a closing checklist, matching the top anchor; the destructive/batch validation cap does not apply to doc writing.

Progressive Disclosure

A single well-sectioned SKILL.md with clearly signaled one-level-deep references to companion skills ('.claude/skills/simple-english/SKILL.md', '.claude/skills/i-have-adhd/SKILL.md'), and no bundle files exist to organize. It is not a 5 because the skill exceeds the simple-skill line and the ~30-line package-manager tabs section (framework package lists, install-mode rules) is detailed reference material inlined in the main file that could live in a references file.

Specificity

Names several concrete actions ('writing, editing, or organizing documentation', 'planning what docs a feature needs', 'naming the readers', 'picking a tone') with only minor gaps in coverage. It is not a 5 because the 'what' is carried entirely by 'Use when' clauses rather than a distinct capability statement, and output types (guides, reference pages, README placement) are not named.

Completeness

Both 'what' ('writing, editing, or organizing documentation', 'planning what docs a feature needs') and 'when' are explicitly answered, with seven concrete trigger phrases plus a slash command. The 'when' is far more explicit than the level-4 anchor requires, matching the anchor for clear and explicit answers to both with concrete trigger phrases.

Trigger Term Quality

Good keyword coverage with very natural user phrases ('write docs for X', 'document this feature', 'add a guide', 'update the docs', 'reorganize the docs', 'plan feature X', 'implement X', '/docs') plus synonyms (documentation, docs, guide). A few natural terms are missing (readme, changelog, 'documentation site', '.md files'), which keeps it at the 'good coverage, a few natural terms missing' anchor rather than comprehensive.

Distinctiveness Conflict Risk

The documentation domain and most triggers are specific, but 'whenever planning or implementing a new feature or change in a repo' and the triggers 'plan feature X' / 'implement X' are broad enough to fire alongside general feature-planning, code-review, and implementation skills. It sits at 'somewhat specific but could still overlap with similar skills' rather than 'mostly distinct' because the intentional docs-ship-with-code scope collides with ordinary development requests.