Conciseness

The body is mostly operational and CloudBase-specific (result._id shape, rule-evaluator caching, CUSTOM rule syntax) rather than explaining known concepts, but it is noticeably duplicated: the CMS role-rule pattern and the result._id gotcha each appear in full in both "Common mistakes / gotchas" and "Working rules", and the generic try/catch "Error handling" example adds little Claude doesn't already know. This matches 'mostly efficient but includes some unnecessary explanation or could be tightened' rather than the lean 4–5 anchors.

Actionability

Guidance is largely executable: a canonical init block, working query/create/pagination/field-selection examples, exact security-rule expressions (``get(`database.user_roles.${auth.uid}`).role == 'admin' || doc.authorId == auth.uid``), and concrete verification steps (read result.code/result.message, get() round-trip on the written _id). It stops short of the 5 anchor because update/remove examples are absent and the companion files that would carry them (crud-operations.md etc.) are not in the bundle — minor gaps in covering the common cases.

Workflow Clarity

The "Minimal checklist" plus numbered "Working rules" give a clear starting sequence (confirm browser-side -> shared init -> verify auth -> read companion reference), and database-appropriate feedback loops are explicit: retry after the 2–5 minute permission-rule cache window, verify writes via result fields and a get() round-trip, and inspect the rule model on permission failures. It is not a 5 because the sequence is distributed across several sections rather than one coherent ordered workflow with checkpoints at each step.

Progressive Disclosure

The "Quick routing" section is well-signaled and one level deep (CRUD -> ./crud-operations.md, etc.), but none of the seven referenced companion files exist in this bundle — there is no references/ directory — and the sibling skill paths (../auth-web-cloudbase/SKILL.md, ../postgresql-development-cloudbase/references/pgdoc.md) are also absent. Additionally, material that belongs in security-rules.md (the full CMS pattern and propagation behavior) is inlined at length. The structure is good on paper but the disclosure chain cannot actually resolve in this environment, which fits 'some structure but could be better organized' better than the 4 anchor.

Specificity

The description lists several concrete actions — "Query, create, update, and delete document data" — anchored to a named domain ("CloudBase document database Web SDK"). It falls short of the 5 anchor because capabilities the skill actually covers (pagination, aggregation, realtime watch, geolocation) are absent, leaving minor gaps in coverage.

Completeness

Both 'what' ("Query, create, update, and delete document data" via the Web SDK) and 'when' ("only for confirmed NoSQL collection work", plus an explicit negative trigger: "if the task mentions PostgreSQL / CloudBase PG / app.rdb(), route to postgresql-development instead") are present. Not a 5 because the positive 'when' lacks concrete positive trigger phrases — it states the constraint but never says 'use when the user mentions app.database(), collections, .where(), watch()' or similar.

Trigger Term Quality

Good keyword coverage: "CloudBase", "document database", "NoSQL", "collection", "PostgreSQL / CloudBase PG / app.rdb()" are terms a user would plausibly say when needing this skill or when needing to be routed away from it. A few natural positive triggers are missing (e.g., "db.collection()", "app.database()", "@cloudbase/js-sdk"), keeping it below the comprehensive-synonyms bar of a 5.

Distinctiveness Conflict Risk

Clear niche (CloudBase NoSQL document work in the browser via the Web SDK) with explicit conflict resolution — the PostgreSQL/CloudBase PG/app.rdb() routing instruction actively prevents the most likely wrong-skill trigger. Conflict risk with adjacent skills is minimal; the scoping to "Web SDK" and "NoSQL collection work" separates it from the Mini Program and PG variants.