The body is dense and repo-specific, assuming TypeScript competence without explaining basic concepts; every section (one rule, two bases, module strategy, tier table, never-redeclare table) earns its tokens. It avoids the padding seen in the score-1/2 anchors and has at most minor editorial flair.

It provides copy-paste-ready jsonc library shapes, an eight-tier table with exact 'extends' strings and per-tier leaf adds, and concrete commands ('bun install', 'bun typecheck'). This matches 'fully executable code/commands; copy-paste ready' rather than the pseudocode/incomplete guidance at score 2.

The 'Adding a new package' section is a clearly sequenced 1-4 workflow ending in an explicit validation checkpoint ('bun install at the repo root, then bun typecheck'). Since this is config editing rather than a destructive/batch operation, the missing-feedback-loop cap does not apply, so it reaches score 3.

Content is well organized into clear sections, and the bulky rationale/migration history is offloaded to a single one-level-deep, clearly signaled reference ('specs/20260522T190000-modernize-monorepo-tsconfig.md'). No bundle files exist to verify, but the in-file structure and signaling already meet the score-3 anchor.

It lists multiple concrete actions - 'adding a package, editing any tsconfig.json, picking a tier for a new app, or debugging module resolution' - rather than vague language, matching the score-3 anchor. It is not merely naming a domain with partial actions (score 2).

It answers both halves: the 'what' ('TypeScript config conventions... the two-base layering, the eight leaf tiers, and the never-redeclare list') and an explicit 'Use when...' trigger clause. This matches the score-3 anchor for clearly answering what AND when with explicit triggers.

Natural user-facing terms are well covered, including the concrete file name 'tsconfig.json' and the common pain point 'debugging module resolution'. It goes beyond 'some relevant keywords' (score 2) to good coverage of terms a user would actually say.

The monorepo-specific tsconfig niche (two-base layering, eight leaf tiers, never-redeclare list) is highly distinctive and unlikely to trigger for unrelated skills. It is far more specific than the overlapping-skill cases at score 2.