Conciseness

Every step is lean and imperative ("Kebab-case, short and plain, such as `ring-toss`", "Never use local storage directly"), with no explanation of concepts Claude already knows and no padding. Not a 4 because there are essentially no sentences that could be trimmed without losing information.

Actionability

Concrete paths (`src/games/<game-id>/`, `src/games/index.ts`), exact commands (`npm run format`, `npm run check`), and exact API calls (`recordScore(ringToss.id, score)`, `canvasFont(...)`) make the guidance mostly executable. Not a 5 because the centerpiece code block's `start(canvas)` body is placeholder comments rather than runnable code (a template, justified by the pointer to water-cannon but still a gap).

Workflow Clarity

Ten clearly sequenced steps with an explicit validation step ("Run `npm run format`, then `npm run check`"), a fix feedback loop ("fix anything it reports"), and a "Done when" checklist. Not a 4 because both checkpoints and an error-recovery loop are explicit, and the operations are non-destructive so no cap applies.

Progressive Disclosure

The body is roughly 50 lines with well-organized sections (pattern pointer, Steps, Done when) and no bundle files to disclose; its only references are one-level pointers to real repo artifacts (`src/games/water-cannon/game.ts`, `src/carnival/theme.ts`). Not a 4 because nothing that belongs in a separate file is inlined and navigation is trivial.

Specificity

"Add a new game to the Tessl Carnival midway, following the water cannon pattern and the house rules" names the domain and one concrete action with two supporting directives, but does not list several distinct capabilities. Not a 4 because there is only one core action rather than a list of specific actions with minor gaps.

Completeness

Explicitly answers both what ("Add a new game to the Tessl Carnival midway, following the water cannon pattern and the house rules") and when ("Use when asked to build, add or create a carnival game or booth...") with concrete trigger phrases. Not a 4 because the when-clause is already explicit and specific, not merely present.

Trigger Term Quality

"build, add or create a carnival game or booth, such as ring toss, whack-a-mole or hook a duck" covers verb synonyms (build/add/create), noun synonyms (game/booth), and concrete instance examples users would naturally say. Not below 5 because no common natural phrasing for this domain is missing.

Distinctiveness Conflict Risk

"Tessl Carnival midway" pins a clear niche with distinctive triggers (carnival game, booth, ring toss, whack-a-mole, hook a duck), so it is unlikely to fire for the wrong skill. Not a 4 because overlap risk with other skills is minimal given the project-specific naming.