Conciseness

The body is efficient: code examples are lean with brief purposeful comments, and nothing explains concepts Claude already knows. Minor trimmable padding exists — the "Knowledge Reference" section re-lists 17 keywords already covered everywhere else, and the maintainer/documentation footer lines are non-operational. This is the 4 anchor ("minor instances that could be trimmed"), not 3, since the padding is small and nothing is over-explained.

Actionability

The branded-types, type-guard, utility-type, and tsconfig examples are complete and copy-paste ready, and the workflow names concrete commands (`tsc --noEmit`, `type-coverage`). It falls short of the 5 anchor because tRPC — a headline capability — has no example or concrete step anywhere in the body, and type-coverage invocation is vague ("a tool like `type-coverage`") rather than a runnable command. Not 3: the guidance present is fully executable, not pseudocode or high-level hints.

Workflow Clarity

The Core Workflow is a clear 5-step sequence with explicit validation checkpoints — "run `tsc --noEmit` to catch type errors before proceeding", "re-run `tsc --noEmit` to confirm zero errors after changes", and type-coverage confirmation — plus an explicit feedback loop: "iterate on steps 3–4 until all checks pass". This matches the 5 anchor; the work is not destructive or batch, so no cap applies.

Progressive Disclosure

The Reference Guide table lists each topic, its file path, and a "Load When" condition — clearly signaled navigation with all five referenced files verified to exist in `references/` and only one level deep. Inline code examples are appropriately sized quick references, matching the 5 anchor ("clear overview with well-signaled one-level-deep references; content appropriately split; easy navigation").

Specificity

The description lists multiple specific concrete actions — "Implements advanced TypeScript type systems, creates custom type guards, utility types, and branded types, and configures tRPC for end-to-end type safety" — covering the domain comprehensively. It matches the 5 anchor ("lists multiple specific concrete actions; comprehensive coverage") rather than 4, since no meaningful capability from the body is left out of the description.

Completeness

Both questions are explicitly answered: the "what" ("Implements advanced TypeScript type systems, creates custom type guards... configures tRPC...") and the "when" ("Use when building TypeScript applications requiring advanced generics, conditional or mapped types, discriminated unions, monorepo setup, or full-stack type safety with tRPC") with concrete trigger phrases. This matches the 5 anchor exactly.

Trigger Term Quality

Natural terms users would actually say are present: "advanced generics", "conditional or mapped types", "discriminated unions", "monorepo setup", "full-stack type safety with tRPC". It falls short of the 5 anchor because common variations such as "tsconfig", "strict mode", or "type narrowing" appear only in the metadata triggers, not the description itself.

Distinctiveness Conflict Risk

"Advanced TypeScript type systems" and "tRPC for end-to-end type safety" carve out a clear niche with distinct triggers, but the broad "building TypeScript applications" phrasing gives a general TypeScript-coding skill some overlap risk. This is the 4 anchor ("mostly distinct; minor overlap risk with closely related skills") rather than 5.