Conciseness

The ~45-line body is lean and assumes Claude's competence: no explanation of what TypeScript is, no padding, and every sentence carries policy or navigation ('Use the repository's existing tools for enforceable rules. Do not reimplement deterministic TypeScript, ESLint, or formatting checks.').

Actionability

The workflow is directive and concrete (inspect repository configuration, load rules per decision, adapt examples, verify with 'focused type checks, lint, formatting, and behavioral tests') with explicit termination criteria ('Finish when each relevant decision has a rule source'), but all executable detail is delegated to the references and the repository's own tools, leaving minor gaps in the body itself.

Workflow Clarity

A clear four-step sequence (Establish policy → Load rules → Apply → Verify) with an explicit validation step ('Use the shortest feedback loop that exercises the affected behaviour... run repository-mandated gates at their defined stages') and an exception rule; however, error-recovery feedback loops are only implied ('Expand by impact') rather than explicit, so it sits at 4 rather than 5.

Progressive Disclosure

The body is a pure overview with well-signaled, one-level-deep references each carrying 'read for...' descriptions and ownership notes, and all 8 local reference files exist in references/. However, 3 of the 13 links ('../typescript-contracts/references/boundary-examples.md', '../typescript-contracts/references/inference-examples.md', '../node/references/concurrency-examples.md') point to sibling skill directories that do not resolve in the actual bundle, leaving minor navigation gaps.

Specificity

The description enumerates many concrete topic areas ('types, discriminated unions, function APIs, variables and state, naming, source organization, React components and hooks, data flow, or tests') but the actions themselves are only three generic verbs ('writing, reviewing, or explaining'), so it lists several specific capabilities with minor coverage gaps rather than the multiple distinct concrete actions of a 5.

Completeness

Clearly answers both: the what ('Apply TypeScript conventions') and an explicit, specific when ('when writing, reviewing, or explaining types, discriminated unions, function APIs...') with concrete trigger phrases, plus a negative boundary ('Do not use for styling or layout alone'). The 'when' is explicit and enumerated, not merely present or weakly implied, matching the anchor-5 example structure.

Trigger Term Quality

Includes natural terms users would say such as 'TypeScript', 'types', 'discriminated unions', 'React components and hooks', 'data flow', and 'tests', but misses common synonyms and variations like 'TS', 'interfaces', 'generics', or '.ts', so a few natural terms are missing.

Distinctiveness Conflict Risk

The TypeScript policy niche is distinct with TS-specific triggers, but somewhat generic trigger words like 'naming', 'tests', and 'data flow' could overlap with testing, React, or general style-guide skills; the negative boundary mitigates but does not fully eliminate that minor overlap risk.