Conciseness

Every line carries project-specific information — paths, APIs, commands, constraints — with zero conceptual padding, and it delegates the pattern rather than re-explaining it ("Read `src/games/water-cannon/game.ts` first: it is the pattern to copy"). Nothing to trim, so the score-4 anchor ("minor instances of over-explanation") does not apply.

Actionability

Fully concrete guidance: exact paths (`src/games/<game-id>/`, `src/games/index.ts`), specific APIs (`recordScore(ringToss.id, score)` from `src/carnival`, `theme.colors.*`, `canvasFont(...)`), commands (`npm run format`, `npm run check`, `npm run dev`), and a copy-paste-ready `CarnivalGame` export scaffold. The placeholder comments inside `start()` are explicitly justified flexibility — each game's loop is inherently different, and the water-cannon file is the complete worked example.

Workflow Clarity

Ten clearly sequenced steps in a sensible order with an explicit validate-and-fix feedback loop ("Run `npm run format`, then `npm run check`, and fix anything it reports"), optional manual verification ("run `npm run dev`, walk to the new booth and play a round"), and a "Done when" checklist of three verifiable outcomes. This matches the top anchor (explicit validation steps, feedback loops, checklists); the operation is additive, not destructive or batch, so no cap applies.

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ are absent), and this ~55-line self-contained body has clean sections (intro, Steps, Done when) with a single clearly-signaled external pointer to the canonical pattern file. Per the simple-skill guidance, a short skill with no need for external references scores 5 with well-organized sections; there is no inlined content that belongs in a separate file, so the score-4 anchor's "minor organization gaps" does not apply.

Specificity

Names the domain and one concrete action with a method reference — "Add a new game to the Tessl Carnival midway, following the water cannon pattern and the house rules" — matching the "domain and 1-2 concrete actions, but not comprehensive" anchor. It does not list several distinct actions, so the score-4 anchor ("Lists several specific actions; minor gaps") does not fit.

Completeness

Explicitly answers both questions: the what is "Add a new game to the Tessl Carnival midway, following the water cannon pattern and the house rules" and the when is "Use when asked to build, add or create a carnival game or booth, such as ring toss..." with concrete trigger phrases. This is an exact match to the top anchor; score 4 would require the when to be less explicit or specific.

Trigger Term Quality

"Use when asked to build, add or create a carnival game or booth, such as ring toss, whack-a-mole, hook a duck or high striker" covers verb synonyms (build/add/create), noun synonyms (game/booth), and four concrete game names a user would naturally say. No natural term is missing that would place it at the score-4 anchor ("a few natural terms missing").

Distinctiveness Conflict Risk

"Tessl Carnival midway" and the named games ("ring toss, whack-a-mole, hook a duck or high striker") define a clear niche with distinct triggers and minimal conflict risk with any other skill, matching the score-5 anchor.