Conciseness

The body is dense with CloudBase-specific signal (no explanations of concepts Claude already knows), but the same instructions repeat: the 'MCP tools missing → readiness check → tcb CLI' fallback appears three times (Workflow diagram, Key constraints, and High-yield guardrails), and the PG routing rules appear three times (routing table, Working rule 4, and the Legacy API STOP card). That repetition fits 'mostly efficient but could be tightened' rather than the minor-trimming of 4.

Actionability

Guidance is copy-paste concrete throughout: exact endpoints (`https://tcb-api.tencentcloud.com/mcp/v1`), env vars (`TCB_SITE=intl`, `TCB_IS_INTL=true`), parameterized tool calls (`queryEnv(action=list, alias=..., aliasExact=true)`, `manageAppAuth(action="patchLoginStrategy", patch={usernamePassword: true})`), and exact SDK calls (`auth.signInWithPassword({ username, password })`, `app.rdb().from(...)`). Per the rubric's instruction-only note, the absence of full code blocks is not penalized since every routing decision and prerequisite call is executable as written.

Workflow Clarity

The three-stage workflow (explore → resource preparation via MCP → frontend → close-out) is explicitly sequenced, with validation and feedback loops at the risky points: Stage 3 mandates cloudbase-code-review before declaring done, the Change Safety Protocol and Deployment Gate add verify steps for non-trivial changes and deploys, and 'If the same path fails 2-3 times, stop retrying and reroute' plus 'validate the actual SDK result instead of assuming success' give explicit error recovery.

Progressive Disclosure

The hub design is clean: every reference is one level deep (`./<skill>/SKILL.md`) and each is signaled with the exact condition that routes to it, matching good structure. It falls short of 5 because no bundle files exist to verify the ~15 referenced sibling skills and the two protocol files resolve, and some sub-skill detail (the auth blocking prerequisite, the PG STOP card) is inlined in the hub where the referenced skills would carry it — minor organization gaps.

Specificity

Quotes like "Routes PostgreSQL / CloudBase PG / app.rdb() / queryPgDatabase / managePgDatabase work away from legacy NoSQL and old auth patterns" list several concrete technical surfaces and actions. It falls short of 5 because the description only covers the PG/auth routing slice of what the body shows is a full app-task router (auth, storage, deploy, mini programs are not mentioned), and above 3 because it goes beyond 1-2 generic actions.

Completeness

Both halves are explicit: the what ("Unified CloudBase execution guide for all-in-one skill installs... Routes PostgreSQL / CloudBase PG... work away from legacy NoSQL and old auth patterns") and the when ("Use this first for CloudBase app tasks, especially existing apps with TODOs, fixed pages, or active handlers") with concrete trigger conditions. It matches the 5 anchor and exceeds 4 because the when-clause names specific task shapes rather than a generic domain pointer.

Trigger Term Quality

"CloudBase app tasks", "PostgreSQL", "CloudBase PG", "app.rdb()", "queryPgDatabase", "existing apps with TODOs" give good natural-term coverage a user or Claude would plausibly say. Not 5 because common variations the audience actually uses — 云开发, 小程序/WeChat mini program, Tencent CloudBase — appear only in the body, not the description.

Distinctiveness Conflict Risk

"CloudBase" is a clear niche with distinct triggers ("Use this first for CloudBase app tasks"), and the 'use this first' positioning makes it the entry point rather than a competitor to sibling CloudBase skills. Minimal conflict risk with non-CloudBase skills.