AI Skills, MCP Tools, and CLI for Unity Engine. Full AI develop and test loop. Use cli for quick setup. Efficient token usage, advanced tools. Any C# method may be turned into a tool by a single line. Works with Claude Code, Gemini, Copilot, Cursor and any other absolutely for free.
Unity-MCP connects AI coding agents to the Unity game engine through MCP, letting them work with the Unity Editor and running games. It is used by game developers to generate code, automate development and testing, debug projects, and add AI-driven behavior to games. The catalogue entries provide skills, instructions, an MCP integration, and settings for operating this workflow.
This repository also configures its own agents. See what Unity-MCP tells them →
Skill Claude Code
Generate a JSON Schema for a C# type name via reflection. Supports primitives, enums, arrays, generic collections, dictionaries, and complex objects. Knobs control inclusion of nested $defs and whether type-level / property-level descriptions are emitted.
Skill Claude Code
Provides an initial setup for AI Skills, unity-mcp-cli command line tool installation and everything else that is helpful to set up at the start of the project. Essential packages, and basic configurations.
Skill Claude Code
Create a new skill (MCP tool) for the Unity Editor by writing a C# (.cs) file that Unity compiles into the project. After compilation the new tool becomes callable through MCP. The file must be a partial class decorated with [AiToolType], each tool method must be decorated with [AiTool], the class name should match…
Skill Claude Code
Regenerate every SKILL.md from the project's currently-registered MCP tools into the configured skills folder (or a project-relative override path). Writes the YAML description: from [AiSkillDescription] and the body from [AiSkillBody].
Skill Claude Code
List all Unity-MCP tools registered in the connected Unity Editor instance. Optional regex filter matches against tool name, description, and argument names/descriptions. Use the includeDescription / includeInputs toggles to control the response size.
Skill Claude Code
Split a C# file into Unity 6.5+ and pre-Unity 6.5 variants. Use when a file needs different implementations for different Unity versions due to API changes (e.g., EntityId vs int, GetEntityId vs GetInstanceID).
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: