Play a three.js page

After open, interact sends steps frame by frame and replies with what changed in the state:

• { key: "ArrowRight", frames: 30 } holds a key that many frames; a mouse or touch step ({ mouse: "click", x, y }) says which named object is under it.
• { state: { ... } } sets a moment up first (through window.__game.setState); { until: { "player.grounded": true }, max: 120 } steps until the state holds and says the frame.
• trace: ["player.y"] gives a path's peak, first change and landing with their frames; look: true adds the picture after the steps.

observe reads the state without playing; feel says what reacted on screen to an event (pops, flashes, shakes, particles, sounds, teleports). The state is exact when the page sets window.__game (the convention, and the rest of the method: ../threejs-game/SKILL.md). To keep a play as a check, see the threejs-test skill.

If open and interact are not among your tools, the paprika3d MCP server is not installed: it runs as npx -y paprika3d serve (stdio), and https://paprika3d.com/docs/install has each agent's line.