Conciseness

Mostly efficient bullet-driven routing guidance, but the "Use this first when" section largely mirrors the frontmatter description, and the "Minimal checklist" anonymous-login bullet is a dense run-on paragraph duplicating nearly verbatim the warning in references/extended-guide.md §2, plus version-sensitive "@cloudbase/js-sdk 3.x" detail outside any deprecated/old-patterns section. Not 4: these are more than minor trims; not 2: there is no concept over-explanation and the structure is still tight.

Actionability

Concrete, executable direction: named MCP tools ("queryAppAuth / manageAppAuth"), enumerated auth-tool actions ("status, start_auth, set_env, logout, get_temp_credentials"), and a numbered preferred execution order with explicit fallback rules ("Use callCloudApi only as a fallback"). Not 5: no example request payloads inline (those live in the extended guide) and the "Minimal checklist" step points to a checklist.md that is not in the bundle.

Workflow Clarity

The "Preferred execution order" (1-4) and Activation Contract give a clear decision sequence, but validation checkpoints are only pointers to files absent from the bundle: "Read [Authentication Activation Checklist](checklist.md)" (missing) and the Change Safety Protocol path ("cloudbase-platform/references/protocols/change-safety-protocol.md", also not present). Enabling/disabling providers is a configuration-change workflow whose verification steps resolve to dangling references — a validation gap capping this at 3. Not 2: the sequence itself is coherent and well-defined.

Progressive Disclosure

The one-level-deep reference to references/extended-guide.md (which exists, is well-structured, and contains no nested references) is good, and the "Then also read" cross-skill pointers are clear. But the body links a missing in-bundle file (checklist.md) while the "Reference index" claims to list "All packaged reference files" (only extended-guide.md), and the dense anonymous-login warning is inlined in the body though it already lives in the extended guide — content that should be separate is inline. Not 4: the dangling link plus the index/body contradiction are more than minor organization gaps; not 2: structure and navigation of what does exist is good.

Specificity

Quotes concrete actions — "inspect, enable, disable, or configure auth providers, publishable-key prerequisites, login methods, SMS/email sender setup" — giving several specific capabilities. Not 5: the trailing "or other provider-side readiness" is open-ended and generic, diluting the concrete action list; not 3: well beyond 1-2 actions.

Completeness

What ("CloudBase auth provider configuration and login-readiness guide") and an explicit when-clause ("This skill should be used when users need to...") with concrete trigger phrases are both present, matching the anchor-5 example pattern. Not 4: the when is fully explicit and specific, not merely adequate.

Trigger Term Quality

Natural trigger terms include "auth providers", "login methods", "SMS/email sender setup", "publishable-key prerequisites", "configure". Not 5: misses common user phrasings and synonyms like "third-party login", "sign-in methods", or named providers (WeChat, Google); not 3: keyword coverage is good and domain-specific.

Distinctiveness Conflict Risk

Scoped to provider-side readiness "before implementing a client or backend auth flow", carving a clear niche against implementation skills. Not 5: phrases like "login methods" and "SMS/email sender setup" could plausibly trigger sibling client-implementation skills (web/miniprogram/node auth) in a CloudBase skill family; not 3: the boundary language is explicit.