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Openturn ships a skill that teaches AI coding agents how to author Openturn games — game state, moves, views, phases, turns, hidden info, randomness, simultaneous moves, bots, and testing. With it installed, Claude Code (or any supported agent) loads Openturn-specific guidance automatically when you work in an Openturn project or ask it to build a turn-based game.

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Install

npx skills add openturn-io/openturn
Run inside a project to install for that project, or pass -g to install globally for all projects: 
npx skills add openturn-io/openturn -g
To target a specific agent only: 
npx skills add openturn-io/openturn -a claude-code

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Update

npx skills update openturn

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Uninstall

npx skills remove openturn

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What the skill knows

  • Game definition with @openturn/gamekit: defineGame, the move helper, phases, turns, MoveRunContext.
  • Lower-level state graphs with @openturn/core (when to drop down).
  • Views: views.public, views.player, hidden-info patterns.
  • Replay-safe randomness via ctx.rng.
  • Simultaneous moves via activePlayers filtering.
  • Bots: defineBot, decide, simulate, the legalActions enumerator contract.
  • Testing game definitions with createLocalSession and bun:test.

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Out of scope

The skill stays focused on game definition. For React UI, lobby, multiplayer hosting, deploying to Openturn Cloud, replays-as-product, and the inspector, follow the dedicated guides in this site.

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Source and feedback

The skill lives at skills/openturn/ in the openturn repo. File issues or improvements at openturn-io/openturn/issues.