Conciseness

Nearly every token is project-specific knowledge Claude cannot know (pipeline stages, domain-map IR, side-effect membrane rules, env vars, .js import convention), and it explicitly refuses to enumerate methods ('It does not enumerate every method'). The ASCII pipeline diagram and a few JSON examples could be tightened, which keeps it at the 'minor instances of over-explanation' anchor rather than the lean 5.

Actionability

Fully executable throughout: exact commands ('bun scripts/capture-tools.ts', 'npx vitest run test/unit/sdk.test.ts', 'bun scripts/e2e-test.ts', 'npx tsc'), copy-paste TypeScript/JSON examples for every pattern, and numbered procedures (Supporting a New Tool, Adding a New Side-Effect Method) that cover the common cases. This matches the anchor-5 example.

Workflow Clarity

Multi-step processes are explicitly sequenced with validation checkpoints and feedback loops: 'Run validate-generated.ts to confirm consistency', Stage 3 validation rules for side-effect declarations, and the Red-Green-Yellow pattern that mandates failing tests first, then passing tests, then refactor with 'validate-generated.ts to verify pipeline integrity'. This matches the anchor-5 validate-fix-retry shape.

Progressive Disclosure

The body is ~345 lines with no references/, scripts/, or assets/ files in the bundle — everything is inlined under decent section headers. Content that plausibly belongs in separate reference files (the domain-map IR schema with multi-part JSON examples, the AI SDK adapter / tools-subpath usage docs, the side-effect extension pattern) is inline, matching the 'some structure but could be better organized; content that should be separate is inline' anchor rather than the well-split anchor at 4. The under-50-line simple-skill exception does not apply, and headers alone do not constitute progressive disclosure at this length.

Specificity

Names the domain ('Develop the Stitch SDK') and lists several concrete coverage areas — 'generation pipeline, dual modality (agent vs SDK), error handling, and Traffic Light (Red-Green-Yellow) implementation workflow' — which is several specific capabilities. Not quite a 5 because 'Covers...' names topics rather than concrete actions, leaving minor gaps in what the skill actually does.

Completeness

Explicitly answers both what ('Develop the Stitch SDK. Covers the generation pipeline, dual modality, error handling, and Traffic Light implementation workflow') and when ('Use when adding features, fixing bugs, or understanding the architecture') with concrete trigger phrases — the exact shape of the anchor-5 example. The 'when' clause is explicit, not weakly implied, so it is not a 4.

Trigger Term Quality

'Use when adding features, fixing bugs, or understanding the architecture' uses natural phrases a developer would say. Good keyword coverage, but missing common synonyms and artifact terms users might mention (e.g. 'MCP', 'codegen', 'domain-map', 'generated SDK'), so it falls just short of the comprehensive-with-synonyms anchor at 5 and clearly above the missing-variations anchor at 3.

Distinctiveness Conflict Risk

Clear niche — a named package ('Stitch SDK') with its own vocabulary (Traffic Light, dual modality) — so it is mostly distinct. However, the trigger phrases 'adding features, fixing bugs, or understanding the architecture' are generic dev-work phrases that could overlap with other code-development skills, matching the minor-overlap anchor at 4 rather than the distinct-triggers anchor at 5.