Conciseness

The CLI/operational prose is tight and high-signal (no padding with concepts Claude already knows), but a roughly 610-line inlined windmill-client API reference with full JSDoc for every function is a substantial token cost that could be tightened or moved out, fitting 'mostly efficient but includes some unnecessary [bulk] or could be tightened' rather than the lean level above.

Actionability

Code examples (//native main, RT.Stripe, fetch, S3 load/write) and CLI commands (wmill script preview, generate-metadata with --dry-run) are executable and copy-paste ready with specific flags and signatures, but the deploy step is only described abstractly ("via git push or wmill sync push") and some SDK entries lack usage examples, leaving minor gaps that cap it at 'mostly executable guidance'.

Workflow Clarity

There is a clear sequence (write -> offer/preview -> generate-metadata -> deploy) with real validation checkpoints and a feedback loop (preview validates before deploy, generate-metadata --dry-run lists stale items, diff the .lock to catch unwanted version bumps), but it is delivered as prose decision rules rather than a crisp numbered checklist with explicit validate steps, so it does not reach the level-5 checklist anchor.

Progressive Disclosure

Section headers (## / ###) give real structure and external references (AGENTS.wmail.md, rt.d.ts, the preview skill) are signaled, but there are no bundle files at all and the entire ~610-line SDK API reference is inlined in SKILL.md — exactly 'content that should be separate is inline' — so it sits at 'some structure but could be better organized' rather than the well-split level above.

Specificity

The description names the domain ("writing Bun Native scripts") and one concrete requirement ("The script must start with //native"), but only states a single action/constraint rather than several, so it fits the '1-2 concrete actions, not comprehensive' anchor and not the 'several specific actions' level above.

Completeness

It explicitly answers both: 'when' via "MUST use when writing Bun Native scripts" and 'what' via "The script must start with //native to run on the native worker". Both are present and concrete, but the 'what' is narrow (only the //native constraint, not the full capability set), so it sits at 'has both what and when' rather than the comprehensive level 5.

Trigger Term Quality

"writing Bun Native scripts" is a relevant natural trigger phrase a user would say, but coverage lacks common synonyms and file extensions (TypeScript, .ts, native worker scripts), matching the 'some relevant keywords but missing common variations' anchor.

Distinctiveness Conflict Risk

"Bun Native scripts" with the //native marker is a clear, fairly distinct niche with minimal conflict risk, though there is minor overlap with a regular Bun script skill (the body itself notes the same script runs on the regular worker without //native), placing it at 'mostly distinct; minor overlap risk'.