Conciseness

The body is noticeably verbose through systematic repetition and padded sections, even though everything is accurate: "Models is a full replacement — resend everything" is stated in five places (preflight ②, the UpdateAIModel block, custom onboarding, Best Practices #1), "Never assume the model is already enabled" in four, the anonymous-auth denial in four, and "MUST start with `custom-`" in four; the 13-item "Best Practices" section largely recaps earlier sections verbatim, the "Error Handling Pattern" demonstrates a trivial try/catch Claude already knows, and the "Type Definitions" section duplicates types the SDK itself ships (per the body's own rule #12). This fits 'several unnecessary explanations or padded sections' rather than the mostly-efficient anchor 3.

Actionability

Guidance is fully executable: exact MCP invocations with parameters ("callCloudApi(service=\"tcb\", action=\"DescribeAIModels\", params={ EnvId })"), machine-checkable pass conditions ("postpayPackageId starts with pkg_tcb_tokencredits_", "status is NOT in [3, 4]"), a concrete purchase URL, correct/wrong code tables for createModel arguments, and copy-paste-ready initialization, generateText, and streamText examples with commented expected outputs. Common cases — including the fallback path ("If the call returns InvalidParameter, fall back to camelCase") — are covered.

Workflow Clarity

The "Mandatory Two-Step Preflight" is a clearly sequenced workflow with explicit validation checkpoints and feedback loops: Step 0 obtains the EnvId, preflight ① gives binary branch outcomes ("❌ Not satisfied → stop writing code and surface this to the user", "✅ Satisfied → proceed to preflight ②"), and preflight ② is a numbered decision procedure with explicit jump conditions ("If the target model ... is missing, jump to step 4") plus a terminal self-verification checklist ("Run tsc --noEmit + the project build + open the page with agent-browser and actually trigger the AI call"). Error recovery loops (InvalidParameter → camelCase fallback, re-validate after enable) are present.

Progressive Disclosure

There are no bundle files (no references/, scripts/, or assets/), and the 387-line body inlines material that belongs in separate reference files: the full "Type Definitions" API reference, the provider/model catalog, and the custom-onboarding guide. This matches anchor 3 ('content that should be separate is inline') rather than 2 because the body itself is well-sectioned with clear headers and its external references (sibling skills like `auth-web-cloudbase`, `../auth-tool-cloudbase/SKILL.md`, `web-development/browser-testing.md`) are one level deep and clearly signaled — and it is not 4 because the bulk of the API reference and catalog detail sits inline in SKILL.md instead of being split out.

Specificity

The description lists multiple concrete actions with comprehensive coverage: "Covers generateText and streamText; models via ai.createModel with groups cloudbase, hunyuan-exp, or custom-*, model id in the `model` field" plus the mandatory "two-step preflight before code". It is not a 4 because the skill's entire action surface (routing, methods, group values, model field, preflight) is explicitly named with no minor gaps, matching the 'multiple specific concrete actions; comprehensive coverage' anchor.

Completeness

Both 'what' and 'when' are explicit: what — "Covers generateText and streamText; models via ai.createModel with groups cloudbase, hunyuan-exp, or custom-*"; when — "Use this skill when a browser/Web app ... needs AI models via @cloudbase/js-sdk", reinforced by negative triggers ("NOT for Node.js backend ... Mini Program ... image generation"). Not a 4 because the when-clause is explicit and concrete rather than merely present.

Trigger Term Quality

Trigger terms are comprehensive with synonyms and even non-English variants users would naturally say: "browser/Web app (React, Vue, Next, Nuxt, static sites, SPAs, dashboards, AI chat UI, 页面, 前端, 网页)". It is not a 4 because essentially no common natural phrasing for this domain is missing — framework names, app types, and both English and Chinese layman terms are present.

Distinctiveness Conflict Risk

The niche is clearly anchored to "@cloudbase/js-sdk" browser calls and explicitly disambiguates every adjacent sibling skill: "NOT for Node.js backend (use ai-model-nodejs), Mini Program (use ai-model-wechat), or image generation (Node SDK only)". Conflict risk is minimal because the routing boundary (browser direct call, "do NOT propose a Node.js proxy") is stated explicitly. Voice is the standard third-person 'Use this skill' form, not first/second person, so no specificity penalty applies.