Conciseness

Every sentence carries non-obvious operational knowledge Claude could not infer: why every other module must be reachable under GOPROXY=off, why the input spec must sit inside the SDK copy ('Docker mounts $PWD'), why a private GOCACHE is needed (Go caches module directories as immutable), and that a DEV field is not in the SDK. There is no padding, no explanation of concepts Claude already knows, and the ~20 lines fully cover a genuinely complex procedure. This matches the 'lean and efficient; every token earns its place' anchor.

Actionability

The guidance is concrete and mostly executable: exact script paths ('go/scripts/sanitize_openapi_for_go_codegen.py'), env vars (OPENAPI_VISIBILITY_FILTER=DEPRECATED), flags ('--provider-name coralogix'), and the final commands ('GOMODCACHE=<private> go run ./cmd/tfgen generate ...' and the go build). It falls short of 5 because several steps defer to elsewhere or trail off — 'with the flags of go/scripts/generate_openapi.sh' requires consulting another script, step 6 ends in an ellipsis, and placeholders like '<pinned version>' and '<tag>' are left unresolved — matching the anchor for mostly executable guidance with minor gaps.

Workflow Clarity

A clear, correctly ordered six-step sequence with a Trigger section that states the precondition ('tfgen check passes... but generate needs SDK symbols that no released SDK has yet') and a Why section explaining the mechanism; the closing 'go build ./...' acts as a natural verification checkpoint and 'Never commit a replace or a pin to the candidate' is an explicit safety guard. It is not a 5 because there is no explicit validation/feedback framing (no 'if the build fails with missing symbols, re-check the spec rewrite' loop), which matters for this batch code-generation workflow.

Progressive Disclosure

The skill is under 50 lines, has no bundle files (no references/, scripts/, or assets/ exist), and needs none — everything required is in well-organized sections (Trigger, Fix, Docs from a worktree, Why) with the peripheral docs procedure clearly separated from the main fix. Per the rubric's simple-skill guideline this earns the top anchor: a well-organized single file with no buried or nested references.

Specificity

The description states one concrete action — 'Builds a candidate SDK in a private GOMODCACHE' — within a clearly named domain (tfgen/management SDK generation), which matches the anchor for naming the domain and 1-2 concrete actions without comprehensive coverage. It is not a 4 because it omits the other actions the skill actually performs (spec rewriting, openapi-generator runs, SDK build), and not a 2 because the action given is specific rather than generic.

Completeness

Both 'what' and 'when' are explicitly and concretely answered: 'Builds a candidate SDK in a private GOMODCACHE' states the what, and the 'Use when tfgen generate must run before the management SDK is synced from a cx-management-apis PR (SDK_SYMBOL_MISSING for new contract fields)' clause gives a highly concrete trigger with an error code. This matches the 5 anchor; the 4 anchor's weakness (a less explicit 'when') does not apply here.

Trigger Term Quality

Strong natural keyword coverage for this niche: 'tfgen generate', 'SDK is synced', 'cx-management-apis PR', 'SDK_SYMBOL_MISSING for new contract fields', 'candidate SDK' — a user hitting this situation would plausibly say these. It falls short of 5 because related phrasings a user might naturally use ('terraform provider', 'openapi/swagger spec', 'module cache') are absent, and it is well above 3 because it includes the exact error code and tool names users would paste.

Distinctiveness Conflict Risk

The description occupies a clear niche with distinct triggers — the SDK_SYMBOL_MISSING error code, the cx-management-apis PR context, and tfgen/GOMODCACHE jargon make it very unlikely to fire for any other skill. It matches the 'clear niche with distinct triggers; minimal conflict risk' anchor exactly.