PromptTested
Debug a blank Three.js canvas
A focused diagnostic prompt for the classic scene that renders nothing.
Living field manual
Mix filters, change the grouping order, and share the exact view with anyone.
A focused diagnostic prompt for the classic scene that renders nothing.
A local coding agent that can read, change, and run code in a terminal workflow.
A green build is useful evidence, but it is not evidence that the visible experience works.
Browser automation for agents through structured accessibility snapshots and interactions.
Separate CPU, GPU, asset, shader, and layout costs before optimizing.
The open source web rendering engine and its full monorepo of packages, tools, and viewers.
Connect input, camera, simulation, and presentation before suggesting tuning changes.
The source for the widely used 2D rigid body engine and its current samples.
Keep simulation results stable across fast displays, slow frames, and recording tools.
Domain reload settings can change whether static state resets between runs.