Patina

Control the Unity Editor from any MCP host. One package install, one click, and your AI assistant can see your scene, create objects, and talk to the console.

Patina is a Rust MCP server paired with a C# Unity bridge. It connects your favorite AI coding tool directly to the Unity Editor over a local TCP channel, with zero manual config.

Why Patina?

• One-click setup. Install the UPM package, click a button, and every supported host is configured automatically.
• No Rust required. Release packages ship pre-built binaries for Windows, Linux, and macOS. Just install and go.
• Built for speed. The Rust sidecar keeps the MCP layer fast and lightweight while Unity stays on the main thread.
• Multi-host. Works with Claude Code, Cursor, VS Code, Gemini CLI, JetBrains Rider, Codex CLI, and more.

How It Works

MCP Host  <-- stdio -->  Patina Server  <-- local TCP -->  Unity Editor

The host launches the Rust binary over stdio MCP. The Rust server forwards tool calls into Unity through a local loopback TCP bridge. Unity executes them on the main thread and returns the result.

Quick Start

1. Install the Unity package

In Unity, open Project Settings > Package Manager, add a scoped registry, then install the package by name.

Scoped registry:

Field	Value
Name	npmjs
URL	https://registry.npmjs.org
Scope(s)	com.taygunsavas

Then open the Package Manager (Window > Package Manager), click the + icon in the top left, select Add package by name..., and enter:

com.taygunsavas.patina-unity-mcp

Registry releases are signed during the release workflow for Unity Package Manager verification.

Alternatively, open the Package Manager, click the + icon, select Add package from git URL..., and enter:

https://github.com/taygunsavas/patina-unity-mcp.git?path=/unity-package

Patina is distributed as a complete Unity package artifact with the editor code, native Rust runtime binaries under Plugins/<platform>/, and the Unity metadata needed for import. End users do not need the Rust toolchain or a Git checkout of this repository.

2. Run One-Click Setup

Open Window > Patina Unity MCP and click One-Click Setup.

The setup flow verifies the binary, starts the Unity bridge, auto-configures every detected host, replaces stale entries, and shows restart guidance where needed.

Patina writes host configs to a stable user-level runtime path instead of a per-project Unity package cache path. When the package is updated, the Unity editor package refreshes that managed runtime automatically, so supported MCP hosts do not need to be reconfigured just because the package cache path changed.

3. Start building

Open your MCP host and try:

• "Log hello to Unity console"
• "Show me the scene hierarchy"
• "Create a cube at position 0, 2, 0"

Available Capabilities

Patina keeps the advertised MCP surface compact so hosts do not need to load every Unity command schema into context. Agents should use:

MCP tool	What it does
patina_capabilities	Search or browse the Unity command catalog; request schemas only for specific commands
patina_call	Execute a catalog command with JSON parameters
patina_health	Inspect Patina version, command count, bridge port, optional Unity editor state, and bridge diagnostics

The 86 commands below are available through patina_capabilities and patina_call.

Scene

Tool	What it does
get_hierarchy	Retrieve the active scene's GameObject tree as nested JSON; supports max_depth and name_filter
get_scene_info	Active scene metadata (name, path, build index, root count, dirty state); pass include_all_scenes for all loaded scenes
open_scene	Open a scene by project-relative path; mode single (default) or additive
save_scene	Save the active scene or any loaded scene; supports Save As
new_scene	Create and save a new scene with optional empty or default-game-objects setup

GameObjects

Tool	What it does
create_game_object	Spawn an empty GameObject or a built-in primitive (Cube, Sphere, Capsule, Cylinder, Plane, Quad)
delete_game_object	Permanently delete a GameObject and all its children
duplicate_game_object	Duplicate a GameObject and its children
reparent_game_object	Move a GameObject under a new parent; pass null to promote to scene root
get_game_object_info	Full details for a named GameObject: transform, tag, layer, and all component properties
set_active_state	Show or hide a GameObject via SetActive()
set_tag	Set the tag on a GameObject (tag must be registered in Tags & Layers)
set_layer	Set the layer by name; optionally apply to all children
set_transform	Set position, rotation (Euler), and/or scale in world or local space in one call

Components & Properties

Tool	What it does
add_component	Add a component by short name (Rigidbody) or fully qualified name
remove_component	Remove a component by type name
set_property	Set any serialized property on a component using its SerializedObject path
get_game_object_components	Return a lightweight component list for a GameObject

Batch Operations

Tool	What it does
batch_set_properties	Apply serialized property changes across multiple GameObjects
batch_add_components	Add components to multiple GameObjects
batch_set_transform	Apply transform changes to multiple GameObjects

Prefabs

Tool	What it does
create_prefab	Save a scene GameObject as a prefab asset
instantiate_prefab	Instantiate a prefab into the scene at an optional world position
get_prefab_info	Inspect a prefab asset or scene instance; returns asset type, overrides list, and instance status
unpack_prefab	Sever a prefab instance link; outermost (default) or completely
apply_prefab_overrides	Apply all instance overrides back to the source prefab asset on disk
revert_prefab_overrides	Restore a prefab instance to match its source asset
list_prefab_components	List component types and instance IDs on a prefab asset
edit_prefab_asset	Perform a batch of edit operations (add/remove component, add/remove child, set field) on a prefab asset
open_prefab_stage	Open a prefab asset in Unity's prefab stage for editing
close_prefab_stage	Close Unity's current active prefab stage, optionally saving changes

Assets

Tool	What it does
find_assets_by_type	Search the Asset Database by type filter (t:Material, t:Prefab, t:Texture2D, etc.)
find_assets_by_name	Search the Asset Database by partial name match
get_asset_info	Metadata for an asset: GUID, type, file size, labels, and importer settings
create_folder	Create a new folder in the Asset Database
move_asset	Move an asset to a new project-relative path
rename_asset	Rename an asset in-place
delete_asset	Delete an asset by project-relative path
refresh_asset_database	Trigger AssetDatabase.Refresh; incremental or force-reimport
set_asset_labels	Replace the full label list on an asset

Materials

Tool	What it does
create_material	Create a new Material asset; defaults to URP/Lit
get_material_properties	Read all exposed shader properties with names, types, and current values
set_material_property	Set a shader property (float, bool, color, vector, or texture path)
assign_material	Assign a Material to a specific Renderer slot

Scripts

Tool	What it does
create_script	Create a new C# script from a template (monobehaviour, scriptableobject, editor_window, plain_class, interface) or verbatim content
resolve_script_type	Resolve a MonoScript GUID and asset path by its fully qualified C# type
force_recompile	Trigger a Unity script recompile via AssetDatabase.Refresh(ForceUpdate)
compile_and_get_errors	Trigger script recompile and return compiler errors only
get_compilation_errors	Get the list of current compiler errors and warnings
get_script_content	Read the content of a script file in the project
get_assembly_types	List all types declared in a specific assembly

Scriptable Objects

Tool	What it does
get_scriptable_object	Read serialized fields from a ScriptableObject asset
set_scriptable_object_field	Set one serialized ScriptableObject field

Validation & Health

Tool	What it does
validate_scene	Scan the active scene for quality issues (missing script references, null serialized fields, and broken prefab connections)
validate_assets	Validate a single prefab asset or a folder recursively for missing scripts, broken object references, and unassigned required serialized fields
get_scene_stats	Return lightweight statistics for the active scene (object count, component count, unique type counts, max depth, etc.)

Search & Query

Tool	What it does
find_game_objects_by_tag	Find all active GameObjects with a given tag
find_game_objects_by_component	Find all scene objects that have a given component type
find_game_objects_by_layer	Find all scene objects on a given layer by name
query_game_objects	Find GameObjects matching compound filters
find_game_objects_by_path	Find GameObjects by hierarchy path prefix

Console

Tool	What it does
log_to_console	Emit a message to the Unity Console (info, warning, or error)
get_console_logs	Read buffered console entries; filterable by type, capped by max_results
clear_console	Clear all console log entries

Editor State & Control

Tool	What it does
get_editor_state	Current editor flags and main-thread responsiveness; returns a limited blocked state with blockedByModalDialogLikely if Unity is not processing editor updates
get_project_settings	Read-only snapshot of key project settings (version, build target, color space, physics gravity, etc.)
set_play_mode	Enter, exit, pause, unpause, or step play mode
execute_menu_item	Execute any Editor menu item by full path (e.g. Assets/Refresh)
get_selection	Return the current Editor selection (scene objects and/or asset paths)
set_selection	Set the Editor selection to specific GameObjects and/or asset paths

Undo

Tool	What it does
begin_undo_group	Open a named Unity Undo group
end_undo_group	Collapse operations into the current Undo group
undo	Perform one or more Undo steps
redo	Perform one or more Redo steps
get_undo_stack	Return current Undo and Redo stack entry names

Build & Player Settings

Tool	What it does
get_build_settings	Build Settings snapshot: active target, scripting backend, and full scene list
set_build_scenes	Replace the Build Settings scene list with an ordered list of scene paths
get_player_settings	Read Player Settings for a build target group (Standalone, Android, iOS, WebGL)
set_player_settings	Write Player Settings fields; only non-null fields are changed
set_build_target	Switch the active build target (blocks the main thread on large projects)

Test Runner

Tool	What it does
run_tests	Start a Unity Test Runner execution
get_test_results	Return results from the most recent test run
get_test_list	List available Unity tests

Animation

Tool	What it does
get_animator_info	Read Animator Controller parameters and state information
set_animator_parameter	Set an Animator parameter in play mode
list_animation_clips	List AnimationClip assets in the project

Supported Hosts

Host	Setup
Antigravity CLI (agy)	Automatic
Claude Code (Anthropic CLI)	Automatic (~/.claude.json)
Claude Desktop	Automatic
Cursor	Automatic
Visual Studio Code	Automatic
GitHub Copilot (VS Code)	Linked via VS Code config
Gemini CLI	Automatic
JetBrains Rider / Junie	Automatic
Codex CLI	Automatic

The setup window also detects stale entries, missing hosts, and provides a clean Remove Patina From Hosts action.

Troubleshooting

If a Patina call reports EDITOR_BLOCKED, or mentions that Unity may be waiting on a modal dialog, check the Unity Editor for a save-changes prompt or other blocking popup. Patina cannot safely run queued editor commands while Unity is waiting for user input. Resolve the Unity prompt, then retry the MCP command or run patina_health with {"include_unity_state": true}.

Roadmap

Phase	Focus
Phase 1 ✓	Core tools: console, hierarchy, object creation
Phase 2 ✓	Expanded coverage: scene management, asset operations, component editing
Phase 3 (current)	Distribution and reach: Git URL installation docs, package layout, release pipeline

Local Development

Contributor source checkout

Use this when you are editing unity-package/ or rust-server/ directly from the repository:

1. Point Unity at the local package checkout.
   • file:<your-clone-path>/unity-package
2. Build the Rust server.

cd rust-server && cargo build --release

3. Publish the current binary into the local development runtime path.

pwsh -File scripts/publish-dev-runtime.ps1

4. In Unity, open Window > Patina Unity MCP, enable Use Local Runtime (Contributor), and click One-Click Setup.

This writes host configs against the local dev runtime instead of the managed packaged runtime. Re-run One-Click Setup after every new cargo build --release + publish-dev-runtime pass, and use Remove Patina From Hosts before switching back to the packaged flow.

Stage a local UPM test package

Use this when you want to test the package as it will be published, not the raw source checkout:

pwsh -File scripts/stage-local-upm.ps1

Then add the staged package from disk in Unity:

• dist/local-upm/com.taygunsavas.patina-unity-mcp/package.json

Prefer the staged local package when you are validating package layout, import behavior, or release packaging. Prefer the source checkout path when you are actively editing source and want the fastest edit-build-run loop.

See CONTRIBUTING.md for the full contributor workflow.

Community and Contributing

• Start with CONTRIBUTING.md for the local development loop, validation expectations, and pull request guidance.
• Use GitHub issue forms for reproducible bugs, feature proposals, and usage questions so maintainers get the context they need.
• Read .github/SUPPORT.md before opening a help request.
• Read .github/SECURITY.md for private vulnerability reporting.
• Read .github/CODE_OF_CONDUCT.md before participating in issues and pull requests.
• Pull requests targeting main are expected to pass CI and go through CODEOWNERS + Copilot review once repository rules are enabled.

Requirements

• Unity 6 (6000.3 LTS+)
• A supported MCP host
• Rust 1.75+ (contributors only)

License

MIT