Conciseness

The body is ~40 lines of terse, well-sectioned material (Workflow, Focus Areas, Commands) with zero concept explanation and no padding — it fully assumes Claude's competence. It matches anchor 5 ('lean and efficient; assumes Claude's competence; every token earns its place'), not anchor 4 which reserves room for over-explanation that could be trimmed.

Actionability

Concrete executable commands are given ("plugin-eval analyze <skill-path> --brief-out ./skill-brief.json", "plugin-eval compare before.json after.json"), and the Focus Areas list is specific. However, step 3's guidance depends on a hardcoded absolute path ("/Users/benlesh/.codex/skills/skill-creator/SKILL.md") that is not copy-paste portable, and 'Apply the skill-creator guidance' is high-level — matching anchor 4's 'concrete code or commands with minor gaps' rather than anchor 5's fully copy-paste-ready coverage.

Workflow Clarity

The numbered 4-step sequence is coherent and ends with a re-run-and-compare checkpoint ('Re-run the evaluation and compare before and after outputs'), which serves as validation. It does not reach anchor 5 because there is no explicit feedback loop for what to do when the after-score regresses or the brief is empty, and steps 2-3 lack the per-step checkpoints of the anchor 5 example.

Progressive Disclosure

The body is well organized into clearly signaled sections and, at ~40 lines with one external pointer, fits the simple-skill pattern that could score 5. It drops to anchor 4 ('references mostly clear; minor organization gaps') because the single reference "../../references/chat-first-workflows.md" points to a file that does not exist in the bundle (no references/ directory), and the skill-creator pointer targets a user-specific absolute path outside the skill — both are navigation defects.

Specificity

"Turn plugin-eval findings into a concrete rewrite brief for a Codex skill" names the domain and a single concrete action (producing a rewrite brief), but does not enumerate the several specific capabilities involved (e.g., grouping required vs. recommended fixes, re-running the evaluation, before/after comparison). This matches anchor 3 ('names domain and 1-2 concrete actions, but not comprehensive') and falls short of anchor 4's 'lists several specific actions'.

Completeness

Both parts are present: the 'what' ("Turn plugin-eval findings into a concrete rewrite brief") and an explicit 'Use when...' clause with a concrete trigger ("after asking what to fix first"). It sits between anchors 4 and 5: the 'when' is more explicit than anchor 4 allows, but the 'what' is a single action rather than the multiple concrete actions shown in anchor 5 examples, so the even score applies.

Trigger Term Quality

"Use when the user already evaluated a skill and now wants Codex to improve it, especially after asking what to fix first" supplies natural phrases users would actually say ("improve it", "what to fix first"). A few natural terms are missing (e.g., "rewrite", "refine", "score", "evaluation results"), and the tool name "plugin-eval" is jargon rather than a user-spoken term, so it does not reach anchor 5's comprehensive synonym coverage.

Distinctiveness Conflict Risk

"plugin-eval findings" and "rewrite brief" carve out a clear niche — post-evaluation skill improvement — with distinct triggers that few other skills would claim. It does not match anchor 4 ('minor overlap risk'), since generic skill-improvement skills are explicitly distinguished by the required plugin-eval precondition.