SamG-Coder/ThreeBrowserStudio

LLM-first Three.js WebGPU scene and animation authoring with a persistent native viewport and typed MCP editing

About ThreeBrowserStudio

ThreeBrowser Studio is a persistent Three.js WebGPU authoring runtime for Codex and ChatGPT. MCP is the editor. The native window is a live viewport where a user can watch a project being created and review the same visual evidence as the model. Play evaluates deterministic Action/keyframe animation; game behaviour execution is a later capability.

The project is intentionally standalone. It uses an installed ThreeBrowser Runtime as its renderer/host instead of copying runtime, RTX, game, or sample code into this repository.

The target architecture and phased authoring-pipeline contract are in DESIGN.md. Model operating rules are in AGENTRULES.md. Blender concept mapping and the executable official tutorial translation are in BLENDERCOMPATIBILITY.md.

- One long-running native WebGPU viewport. - One versioned project document and revision shared by MCP and the viewport. - Nine model-facing tools: status, project, inspect, apply, validate, play, render, history, and jobs. - Typed scene/resources and validated shader, texture, and blueprint graph IR. - Atomic changesets, dry-run, undo/redo, recovery, and named saves. - Agent-safe .mjs validation and storage, with MCP authoring/attachment and execution deliberately deferred. - An explicit managed project restores its named save or newer recovery state, including active scene and authored camera, into the persistent viewport.

The nine-tool shape is stable, but each tool advertises only its live slice:

From the project README.

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