Conciseness

The body is dense and project-specific (action-file rules, pendingAction lifecycle, set/merge batching race) with no padding of concepts Claude already knows, but the "Common Tasks Quick Reference" repeats code already shown (useOnyx with selector appears at both the Performance section and the quick reference), and the selector section uses three code blocks where two would carry the same contrast. This fits anchor 4 (efficient, minor trimmable instances) rather than anchor 5 (every token earns its place).

Actionability

Guidance is fully executable: copy-paste-ready TypeScript for merging state, subscribing with selectors, collection-member updates, mergeCollection, and API.write with the three data sets, plus explicit BAD/GOOD contrasts ("re-renders on any report change" vs. "re-renders only when this report changes") and hard rules ("Never call Onyx.merge, Onyx.set, Onyx.clear, or API.write directly from a component"). This matches anchor 5.

Workflow Clarity

The optimistic-update flow is clearly sequenced (optimisticData applied immediately → pendingAction cleared by successData/failureData → failureData reverts and adds errors) and pattern selection is delegated to a decision-flowchart reference, but the skill is a patterns reference rather than a procedure and includes no explicit validation/checkpoint steps (e.g., verifying state after a merge or handling a failed API write). That places it at anchor 4 (clear sequence, most checkpoints present, minor validation gaps) rather than anchor 5's explicit validate-fix-retry loops.

Progressive Disclosure

The structure is good and references are clearly signaled, but the body twice points to [offline-patterns.md](offline-patterns.md) ("For code examples of each pattern (A/B, loading state, finallyData), see offline-patterns.md") and that file does not exist anywhere in the skill bundle — no references/, scripts/, or assets/ directories are present. A dangling reference to a promised bundle file breaks navigation and means the pattern examples it advertises are unavailable, which is a larger defect than anchor 4's "minor organization gaps".

Specificity

The description lists several specific concrete items — "useOnyx hook, action files, optimistic updates, collections, and offline-first architecture" — but these are topic nouns rather than the concrete actions of the anchor-5 examples ("Extract text and tables... fill forms, merge documents"), and "offline-first architecture" is an abstract concept. It exceeds anchor 3 (only 1-2 concrete actions) and sits noticeably above the midpoint, so 4.

Completeness

It explicitly answers both parts: what ("Onyx state management patterns — useOnyx hook, action files, optimistic updates, collections, and offline-first architecture") and when ("Use when working with Onyx connections, writing action files, debugging state, or implementing API calls with optimistic data"), with concrete trigger phrases — a direct match to the anchor-5 example pattern.

Trigger Term Quality

Natural user phrasings are comprehensively covered: "Onyx connections", "writing action files", "debugging state", "optimistic data", plus "state management", "useOnyx", and "offline-first" — the vocabulary a developer on this codebase would actually say. No natural synonyms are obviously missing for this domain, matching anchor 5.

Distinctiveness Conflict Risk

"Onyx" is a highly distinctive niche trigger (the react-native-onyx library), and the skill is anchored on it, giving a clear niche with distinct triggers and minimal conflict risk, matching anchor 5 rather than the "minor overlap risk with closely related skills" of anchor 4.