The body is lean and command-centric — 'Get a ConfigHub worker in place so Targets can function. In the common case there is nothing to run.' followed by copy-paste commands and a decision table — with no padding of concepts Claude already knows. Domain-specific facts (server workers hosted in the ConfigHub server) are genuinely non-obvious and earn their tokens. Not below 3 because there is no excess verbosity.

Fully executable commands throughout — 'cub worker create --space <space> --allow-exists --is-server-worker server-worker', the install pipe 'cub worker install ... --include-secret | kubectl apply -f -', and concrete verify commands — making it copy-paste ready. Not below 3 because there is no pseudocode; flags are specified, not gestured at.

Clear sequenced workflow with explicit checkpoints: Preflight gates (auth/cluster), a branching Server-vs-External decision table, then create → run/install → verify, plus a Verify chain and Stop conditions ('External worker pod keeps crashing (CrashLoopBackOff) — collect kubectl describe pod + cub worker logs, surface the error, stop'). The feedback loop for the crashing pod satisfies the destructive/batch validation requirement. Not below 3 because validation checkpoints are explicit, not implicit.

The body is well-organized into clearly signaled sections and points one level deep to 'references/cub-cli.md' and 'references/yaml-patterns.md', but those referenced files do not exist in the bundle (no references/ directory is present), so the navigation is broken. Not 3 because the disclosure structure depends on files that are missing; not below 2 because the in-body structure and signaling are sound.

Names multiple concrete actions — 'Set up a ConfigHub worker', 'create a server worker (cub worker create --is-server-worker)', and 'Run an external worker (cub worker run / install) only to host custom worker functions' — matching the anchor that lists several specific actions rather than vague language.

It answers both 'what' (set up a worker, server vs external) and 'when' (explicit 'Phrases' triggers plus a 'Not for creating Targets' exclusion), satisfying the anchor for clearly answering both what and when with explicit triggers. It is above 2 because the 'when' is explicit, not merely implied.

An explicit 'Phrases:' clause gives natural terms a user would actually say ('set up a worker, do I need to run a worker, add custom functions'), giving good coverage of common phrasings. Not scored below 3 because the trigger set covers the realistic ways the need surfaces.

The ConfigHub-worker niche is narrow and the explicit 'Not for creating Targets (use target-bind)' exclusion steers overlapping cases away, making conflict with sibling skills unlikely. Voice is third person ('Set up...'), so no specificity penalty applies.