Conciseness

The body is dense and almost entirely project-specific (Drizzle idioms, D1 driver limits, `bun:sqlite` yielding, file:line citations) with no explanation of concepts Claude already knows, so it is well above the mostly-efficient anchor. It falls short of lean-and-efficient because the report-shape rules are stated twice (Step 0 and "Report shape") and some prose is ornamental ("The defect it exists for lives between two writers of one column"), which could be trimmed.

Actionability

Fully executable throughout: copy-paste bash pipelines (the `git diff | perl` state-grep, `git grep -n -w`, the `cat > STATE-REVIEW.md` heredoc skeleton, the `grep -c` shape checks), exact table and finding-format templates with placeholders, and concrete file:line examples for test arrangements (`beforeStatement`, `Effect.all` with `concurrency: "unbounded"`). This matches the anchor for copy-paste ready commands covering the common cases, not the anchor below it with minor gaps.

Workflow Clarity

The sequence is explicit (Step 0 skeleton before any reading, then find states, then list writers, then work nine checks), with a nine-item checklist, mid-run validation (the heading-count grep as soon as the first finding lands, with a recovery instruction when it prints the wrong number), incremental recording so a usage-limited run resumes from the file, and final `grep -c` gates plus a completion line. This matches the anchor for a clear sequence with explicit validation, error-recovery feedback loops and a checklist; the operation is read-only, so the destructive-operation cap does not apply.

Progressive Disclosure

There are no bundle files (no references/, scripts/ or assets/), and the one external pointer — `wiki/shared/state-transitions.md` for the Drizzle idiom examples — is clearly signaled, one level deep, and explicitly marked optional ("The checks below are complete without it"). Structure is strong throughout, but the ~260-line body inlines the full check catalog and report conventions that could partly live in a reference file, which keeps it at good-structure rather than the top anchor.

Specificity

The description enumerates a comprehensive taxonomy of concrete defect classes ("a status, phase, flag or lifecycle timestamp written without the prior state in its WHERE", "an insert racing a unique index", "a refusal in the wrong order") plus the concrete method ("listing every writer of each state across the repository, and reporting findings with G-C/H/M/L IDs in the four-field format"). This matches the anchor for multiple specific concrete actions with comprehensive coverage, not the anchor below it, which requires minor gaps in coverage.

Completeness

It explicitly answers both questions: the opening "Use when reviewing a branch diff for implicit state-machine defects" gives concrete trigger phrases for when, and the closing "by listing every writer of each state across the repository, and reporting findings with G-C/H/M/L IDs in the four-field format" gives a concrete what. This matches the anchor that clearly and explicitly answers both what and when with concrete trigger phrases, not the anchor below it where the when could be more specific.

Trigger Term Quality

Natural terms are well covered — "reviewing a branch diff", "status", "phase", "flag", "lifecycle timestamp", "racing" — but common variations a user would actually say, such as "race condition", "concurrency" or "state transition", are absent. This fits the anchor for good keyword coverage with a few natural terms missing, falling short of the comprehensive synonym coverage of the top anchor.

Distinctiveness Conflict Risk

The niche is clear and the defect classes are highly distinctive, but the leading trigger "reviewing a branch diff" is shared with sibling review lenses (the body references a `review-security` skill and an automated scope classifier), creating minor overlap risk with closely related skills. This fits the anchor for mostly distinct with minor overlap risk rather than the top anchor's minimal conflict risk.