What problem does it solve? Setting up a game-development environment is risky: installing the wrong engine version, conflicting tools, or unlicensed software can break a project. This Skill diagnoses the local toolchain without changing anything, then produces a single reversible setup proposal. ## Core Features & Use Cases - Read-only environment inventory: Detects OS, architecture, WSL, disk space, GPU, VRAM, and installed Unity, Godot, Unreal, Blender, Aseprite, Pixelorama, and Tiled versions without launching them. - Compatibility analysis: Compares the detected environment against pack descriptors and catalog constraints to surface gaps and conflicts. - Reversible setup proposal: Returns one transaction with exact pins, licenses, permissions, downloads, backups, rollback operations, expiry, and digest. - Use Case: Before onboarding a new Unity project, run the diagnosis to confirm engine versions, GPU support, and MCP server configuration, then review a proposed setup plan before approving any change. ## Quick Start Use the toolchain-doctor skill to inspect this project's OS, engine, DCC tools, GPU, and MCP setup without changing anything.