v1.3.2 — Roslyn compiler for full C# support

Fixed

• execute_editor_script now uses Unity's bundled Roslyn compiler via subprocess, giving full modern C# support (local functions, pattern matching, switch expressions, tuples, etc.) on all platforms. The previous CodeDom path silently failed on Linux where Mono's mcs only supports C# 6.
• Fixed "defined multiple times" error storm in execute_editor_script after domain reloads — assembly references are now deduplicated by filename.
• macOS Unity 6000.3+ path discovery: Roslyn binaries moved to Resources/Scripting/ and are now probed correctly.
• Concurrent execute_editor_script calls no longer collide on temp files (per-call GUID subdirectory).
• Pipe-buffer deadlock fixed when stderr fills before stdout is drained.

Thanks to @Sandersm90 for the comprehensive PR (#6).

v1.3.1 — Screenshot capture fix & async capture_frames

What's New

• Fix: get_game_screenshot / capture_frames now read directly from the Game View's internal RenderTexture via reflection, eliminating editor chrome and tiling artifacts that crept in when the ScreenCapture.CaptureScreenshotAsTexture() timing was off
• Rework: capture_frames is now async — it returns a capture_id immediately, and the new get_captured_frames tool retrieves frames (including partial progress for long captures)
• Graceful fallback to camera-render when the Game View isn't available (edit mode, etc.)
• Session auto-purge (60s TTL) skips in-flight captures, so long runs aren't evicted mid-flight

Thanks to @Sandersm90 for the contribution!

v1.3.0 — Cross-platform support & screenshot fix

What's New

• Fix: simulate_key / simulate_mouse / simulate_axis now work on Linux/macOS via Input System (QueueStateEvent)
• Fix: get_game_screenshot now captures ScreenSpaceOverlay canvases in play mode
• Win32 path unchanged for Windows users

Thanks to @Sandersm90 for the contribution!

v1.2.1

Bug Fixes

• Unity 2022.3 backward compatibility: Fixed compilation errors when importing the plugin in Unity versions prior to Unity 6
  • Rigidbody.linearDamping / angularDamping → drag / angularDrag (pre-Unity 6)
  • Rigidbody2D.linearDamping / angularDamping → drag / angularDrag (pre-Unity 6)
  • Collider2D.compositeOperation → usedByComposite (pre-Unity 6)
  • Uses #if UNITY_6000_0_OR_NEWER preprocessor directives

Tested on Unity 2022.3.62f3 and Unity 6.

v1.2.0

What's New

--lite mode for MCP clients with tool limits

The server now supports a --lite flag that registers only 76 core tools, staying well under the 100-tool limit imposed by some MCP clients (e.g., Antigravity).

Usage: Add --lite to server args in your MCP client config:

{
  "mcpServers": {
    "unity-mcp-pro": {
      "command": "node",
      "args": ["path/to/server/dist/index.js", "--lite"]
    }
  }
}

Lite mode core tools (76 tools):

Project, Scene, GameObject, Script, Editor, Prefab, Material, Physics, Lighting, UI, Build, Debug, Screenshot

Full mode (275 tools):

All tools registered as before — no changes to full mode behavior.

Bug fixes (from v1.1.1)

• Timeline asmdef reference fix
• PostProcess reflection fix
• AI waypoint dependency fix

v1.0.0

Unity MCP Pro Plugin v1.0.0

147 tools | 24 categories | 6 resources for AI-powered Unity development via the Model Context Protocol.

Highlights

• 24 tool categories: Project, Scene, GameObject, Script, Editor, Prefab, Material, Physics, Lighting, UI, Animation, Build, Batch, Audio, Analysis, Navigation, Particle, Package, Terrain, Debug, Input, Screenshot, Runtime, Testing
• 6 MCP resources for live Unity state
• Dynamic C# execution (execute_editor_script, execute_game_script)
• Multi-editor support (ports 6605–6609)
• Unity 2021.3 LTS+ / Unity 6 compatible

Installation

This repository contains the Unity plugin only. Copy the Editor/ folder and package.json into your Unity project's Assets/ directory.

For the full package (plugin + MCP server), visit itch.io.