Set the active Godot editor session for subsequent tool calls.

Accepts either an exact session_id or a substring hint matched against the session's short name (project folder basename), project_path, or session_id. An exact id match always wins; a substring must resolve to exactly one session or the tool returns an error listing the candidates.

Session listing.

Resource form: godot://sessions — prefer for resource-aware clients.

Ops: • list() List every connected Godot editor with metadata: session_id, short name, godot_version, project_path, plugin_version, server_version, editor_pid, server_launch_mode, current_scene, play_state, readiness, connected_at, last_seen, is_active. The response also carries the server-global exclude_domains (tool domains not registered on this server via --exclude-domains).

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Get current Godot editor state: version, readiness, open scene, play state.

Resource form: godot://editor/state — prefer for active-session reads. Also reachable as editor_manage(op="state") (same handler) for clients that prefer a single rolled-up tool.

Code-mode MCP adapters keep the server and tool names separate: call('godot-ai', 'editor_state', {}). Never pass a server-prefixed tool name such as godot-ai/get_editor_state; that is neither the adapter's call signature nor a registered tool. For dedicated current- scene data, use readResource('godot-ai', 'godot://scene/current').

Side effect: refreshes the server's session readiness cache from the live editor reply. Useful as a recovery step after a write call is rejected as EDITOR_NOT_READY (state=playing) when you already know the game has stopped — calling editor_state once syncs the cache and the next write proceeds. Issue #262.

Response includes game_status for authoritative game liveness, plus helper_live (status == "live") and session_active (status not in {"not_live", "stopped"}) mirrored from the same fields inside game_status. is_playing remains raw editor play-state; use game_status.status for liveness decisions. game_status.status="break" means the game process is parked in a remote-debugger break (boot-time parse errors do this before the game helper registers); it will not resume on its own — call project_manage(op="stop").

Read recent log lines from the Godot editor, plugin, or running game.

Resource form: godot://logs/recent — prefer for active-session reads.

Sources:

• "plugin" (default): MCP plugin recv/send/event traffic. Buffer 500.

• "game": stdout/stderr/push_error/push_warning from playing game via _mcp_game_helper autoload. Buffer 2000, with lines retained across runs and tagged by run_id. Default reads return current-run lines only; pass since_run_id from an earlier response to read that prior run. Entries: {source, level, text, run_id}; response carries run_id, current_run_id, game_status, helper_live, session_active, dropped_count, stale_run_id. helper_live and session_active mirror the same fields inside game_status; is_running is retained as a compatibility alias of session_active. Boot-time parse/load errors fire before the game helper's logger attaches, so they are NEVER in this buffer; when editor-side errors were recorded during the current run the response adds editor_errors_count and editor_errors_hint pointing at source="editor" — treat a clean game log carrying that hint as a run that lost scripts, not a clean launch.

• "editor": editor-process script errors and the Debugger dock's visible Errors-tab rows — parse errors, GDScript reload warnings, @tool/EditorPlugin runtime errors, push_error/push_warning. Logger-backed entries and Errors-tab rows are read from the editor UI when available. Use when the editor Output or Debugger Errors panel shows red/yellow rows but other sources turned up nothing. Buffer 500 for logger-backed entries; Debugger rows are live UI state. Entries: {source, level, text, path, line, function}. Filtered to .gd/.cs in the user project for Logger-backed entries; addons/godot_ai/ dropped. Logger entries fired before plugin enable are not captured.

• "all": plugin → editor → game lines (with source per entry).

Tail pattern: for game logs, poll the current run with offset=N and keep the returned run_id. current_run_id identifies the active run; run_id identifies the run being read. Passing since_run_id=old_run_id reads retained lines for that prior run, and stale_run_id: true means the requested run is not the current run. For editor logs, read once to capture next_cursor and pass it back as since_cursor on later calls. since_cursor reads Logger-backed editor entries only; live Debugger Errors-tab rows are included in regular source="editor" reads but do not have stable cursors. When since_cursor is set, it supersedes offset. truncated: true means older entries fell out of the ring before the poll; continue from the returned next_cursor and treat oldest_cursor as the earliest retained sequence. Set include_details=True for Errors-tab style metadata on game/editor entries: original code/rationale, error type, resolved source, and stack frames. Default false preserves compact responses.

Capture a screenshot of the Godot editor viewport or running game.

Picking a source: the default "viewport" captures the editor's 3D viewport, which is empty if the edited scene has no Node3D anywhere in the tree (or no scene is open). Those cases return EDITOR_NOT_READY with error.data = {editor_state: "viewport_not_3d", scene_root_type} and an actionable error.message — switch to "cinematic" if the scene has a Camera3D, or open a scene with 3D content.

Sources:

• "viewport" (default): editor 3D viewport. Requires Node3D content in the edited scene (root or any descendant); see above for the no-3D-content / no-scene error shape.

• "viewport_2d": editor 2D viewport. Use for 2D scenes. Not compatible with view_target/coverage/elevation/azimuth/fov.

• "cinematic": render edited scene through its active Camera3D (no editor gizmos). Prefers a Camera3D marked current; falls back to the first Camera3D found in a depth-first walk. NODE_NOT_FOUND only when the scene contains no Camera3D at all.

• "game": running game's framebuffer (only when project is running). A backgrounded/minimized game window freezes its main loop; the capture then returns the last rendered frame with stale_frame: true and a note in the metadata — focus the game window and retry for a current frame. GAME_HELPER_TIMEOUT means the game process never replied at all (nothing rendered yet, main thread blocked, or helper dead) — focus the window and retry, or use game_command to confirm liveness.

include_image=True (default) returns an MCP ImageContent block. view_target (comma-separated Node3D paths) reframes editor camera; AABB metadata always returned. coverage=True with view_target captures perspective + orthographic top-down references.

Reload the Godot editor plugin.

Disables and re-enables the plugin on the next frame. The response shape depends on whether this MCP server was spawned by the plugin or launched externally:

• Plugin-managed (default install): returns a pre-flight ack {status: "reload_initiated", transport_will_drop: true, old_session_id, guidance} immediately. The reload kills this server, so the WebSocket transport drops; reconnect and call session_manage(op="list") to find the new session_id.

• Externally launched (e.g. python -m godot_ai --transport streamable-http --port 8000 --reload): waits for the new session to register and returns {status: "reloaded", old_session_id, new_session_id}. If the old bridge disappears and no replacement registers within 90 seconds, raises PLUGIN_DISCONNECTED with data.reason == "reload_timeout" and recovery diagnostics.

Editor selection, performance monitors, quit, log clearing, game eval.

Resource forms (prefer for active-session reads): godot://editor/state, godot://selection/current, godot://performance

Ops: • state() Editor version, project name, current scene, readiness, play state. • selection_get() Currently selected node paths in the editor. • selection_set(paths) Replace the selection with the given list of scene paths. • monitors_get(monitors=None) Performance singleton values (FPS, memory, draw calls, etc.). Pass a list of monitor names to filter; None returns everything. • quit() Gracefully quit the Godot editor on next frame. • logs_clear(clear_debugger_errors=False) Clear the MCP log buffer. Returns cleared_count. Pass clear_debugger_errors=True to also clear the Debugger dock's visible Errors-tab rows (user-facing UI, so opt-in only); the response then includes debugger_errors_cleared. • game_eval(code) Execute GDScript in the running game with return values. Uses 'await' so user code can await internally. Errors return fast and actionable: EVAL_COMPILE_ERROR for a syntax/parse error, EVAL_RUNTIME_ERROR (with the real message + line) for a runtime error; EVAL_GAME_NOT_READY if the game can't service evals — still launching (retry once it's up), the _mcp_game_helper autoload is missing/disabled, its main loop is not advancing (focus the game), or its debugger session closed; EVAL_HUNG for a live game's genuine infinite loop / never-firing await; EVAL_RESULT_TOO_LARGE if the returned value serializes past the debugger channel's capacity (return a smaller slice).

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Get the scene tree hierarchy from the open scene.

Returns a paginated flat list of nodes with name, type, path, and child count. Walks up to the specified depth.

Resource form: godot://scene/hierarchy — prefer for active-session reads.

Open an existing scene file (.tscn) in the editor.

If path is already the currently edited scene this is a no-op — the in-memory state (including any unsaved MCP mutations) is preserved. Pass force_reload=True when the file on disk is the authority and the editor should discard the open in-memory copy and re-read the scene from disk.

The reply is sent only after the editor has actually switched to the requested scene (switched: true), so follow-up writes are safe immediately. switched: false with settle: "timeout" means the switch had not landed within the wait window. In synchronous contexts (e.g. inside batch_execute) the reply returns immediately with switched: false and settle: "not_waited". In both of those cases, re-check editor_state before issuing follow-up writes.

Save the currently edited scene to disk.

Node and property mutation tools change the editor's in-memory scene; call this explicitly to persist those mutations to the existing path.

Scene authoring (create, save_as, list open roots).

Resource form: godot://scene/current and godot://scene/hierarchy — prefer for active-session reads.

Ops: • create(path, root_type="Node3D", root_name="") Create the initial .tscn with the given root and open it. root_name defaults to filename basename when empty. This initial root is written immediately, but later node_create/node_set_property mutations remain in editor memory until scene_save or save_as is called. • save_as(path) Save the currently edited scene to a new file path. • get_roots() List scenes currently open in the editor; flag the edited one.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Get properties of a node.

Resource form: godot://node/{path}/properties — prefer for active-session reads (returns the full property set).

The default returns every editor-visible property, which can be 50-150 entries. Pass fields to return only the properties you need — a large response-size cut on this hot read. The response always carries total_count (all editor-visible properties) alongside count (returned): an unfiltered call returns the full set, so count == total_count; only the fields filter can make count smaller. Requested names that match no editor-visible property are listed in unknown_fields, so a nonexistent name is distinguishable from a property that exists with a null value.

Null-valued properties are included: an unset object/resource slot (script on an unscripted node, an empty mesh or material, …) returns "value": null with its declared type. An attached script serializes to its res:// path; built-in scripts (no resource path) fall back to their string representation.

Create (spawn) a new node in the scene tree.

Creates a node of the given type and adds it to the parent, or instantiates a PackedScene from scene_path. type and scene_path are mutually exclusive — when scene_path is given, type is ignored.

Set a property on a node.

Verify the property name first — call node_get_properties (or read godot://node/{path}/properties) to confirm the exact name and type before writing. Guessing common Godot names often fails with PROPERTY_NOT_ON_CLASS because Godot's actual properties differ from intuition (e.g. Camera3D uses fov/current, not field_of_view; Sprite2D uses texture, not image; Node3D uses position/rotation/scale, not transform.origin).

Coerces value to the property's type:

• Vector2/Vector3: dict with x/y/z keys.

• Color: dict {r,g,b,a} or hex string ("#ff0000").

• NodePath: string ("../Other/Node").

• Resource: res:// path string (loads + assigns); null/"" clears. {"__class__": "BoxMesh", ...} creates a built-in resource owned by this property. After scene_save it is serialized in-place as a [sub_resource] inside the .tscn; it is not a reusable .tres. For sharing, first call resource_manage(op="create", params={"type": "BoxMesh", "properties": {...}, "resource_path": "res://meshes/box.tres"}), then pass that res:// path here (or use resource_manage(op="assign")).

• StringName: plain string. Array/Dictionary: JSON list/object.

Find nodes in the scene tree by name, type, or group.

At least one filter must be provided. Filters AND together. Paginated.

Node tree manipulation (delete, duplicate, rename, reorder, reparent, groups, hierarchy reads).

Resource forms (prefer for active-session reads): godot://node/{path}/properties, godot://node/{path}/children, godot://node/{path}/groups

Ops: • get_children(path) Direct children of a node (name, type, path each). • get_groups(path) Group names the node belongs to. • delete(path, scene_file="") Remove the node. Cannot delete scene root. Undoable. • duplicate(path, name="", scene_file="") Deep-copy a node + children as a sibling. Cannot duplicate scene root. • rename(path, new_name, scene_file="") Rename a node. Sibling-name collision and "/" / ":" / "@" rules apply. • move(path, index, scene_file="") Reorder among siblings. Index 0 = first. • reparent(path, new_parent, scene_file="") Move under a new parent. Children preserved. Cannot move into descendants. • add_to_group(path, group, scene_file="") Add the node to a group. • remove_from_group(path, group, scene_file="") Remove the node from a group.

All write ops accept the optional scene_file guard — if non-empty, the mutation fails with EDITED_SCENE_MISMATCH when the editor's current scene doesn't match.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Run (play) the Godot project from the editor.

Modes:

• "main": Run the project's main scene (default).

• "current": Run the currently open scene.

• "custom": Run a specific scene (requires scene).

Idempotent: if the project is already running, returns success with data.was_already_running=true (no scene switch). To switch scenes, call project_manage(op="stop") first, then project_run again.

After starting playback, waits briefly for the Godot AI game helper to check in. The response includes game_status, helper_live (status == "live"), session_active (status not in {"not_live", "stopped"}), and any recent_errors observed during the run window. The top-level booleans mirror the same fields inside game_status. game_status.status="not_live" means playback launched but the game did not become live before the helper-ready window elapsed; "no_helper" means the project has no _mcp_game_helper autoload, as with some headless/custom-main-loop setups (helper_live=false, session_active=true); "stopped" means playback stopped or never became active before liveness could be confirmed (helper_live=false, session_active=false); "break" means the game process is parked in a remote-debugger break — during boot this is a GDScript parse/load error that froze the game before the helper could register, and the response names the failing script when captured (game_status.break = {reason, can_debug, pre_live}). A game at a break cannot continue on its own: call project_manage(op="stop"), fix the error, and relaunch. Poll editor_state to see late transitions.

Project run/stop and project.godot settings.

Resource form: godot://project/info and godot://project/settings — prefer for active-session reads.

Ops: • stop() Stop the running project (game). Takes no params — call as project_manage(op="stop") or with params={}. Idempotent: succeeds with was_running=false if the project isn't running. Do NOT pass extra fields like force or reason inside params — only the registered keys are accepted (here, none). For multi-editor setups, pass session_id as a sibling of op/params, not inside params. • settings_get(key) Read a ProjectSettings key (e.g. "application/config/name"). • settings_set(key, value) Write a ProjectSettings key and persist to project.godot. Refuses the startup-execution keys (autoload/*, editor_plugins/*, application/run/main_scene, editor/run/main_run_args, editor/script/templates_search_path); use set_main_scene / autoload_manage(op="add") for the two that have a validated route. • set_main_scene(path) Set the project's main scene — the scene project_run(mode="main") boots and the engine loads at startup. Writes application/run/main_scene and persists to project.godot. path must be a res:// scene inside the project that already exists and loads as a PackedScene, so a scaffolded project can be made runnable without opening the generic startup-execution surface.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Create a script file on disk: GDScript (.gd, validated) or C# (.cs, text only).

Writes content to the path. Overwrites if it exists. Registers the file with the editor. New files include data.cleanup.rm listing the file and, when supported by the editor, its .uid sidecar; overwrite omits it.

.gd: source is parse-validated and the response carries diagnostics (diagnostics_status="checked"); an already-loaded script is refreshed in place. .cs: written as text only — Godot AI does not compile .NET, so diagnostics_status="not_checked" and validation_hint says to build the project (editor Build button or dotnet build) to see compiler errors. dotnet_editor reports whether the connected editor build has .NET at all. Any other extension is rejected; use filesystem_manage op="write_text".

Anchor-based string-replace edit on a .gd or .cs file.

Finds an exact old_text and replaces with new_text. Fails on multiple matches unless replace_all=True; fails on zero matches. Exact byte match (whitespace significant). Triggers filesystem scan. .gd: parse-validated (diagnostics) and an already-loaded GDScript is refreshed in place so the next call runs the new code (response reloaded=true; otherwise reload_reason says why). .cs: text only — diagnostics_status="not_checked", reload_reason= "csharp_requires_build"; rebuild the .NET assembly to run it. Not undoable via Ctrl+Z.

Attach a script to a node in the scene tree.

Replaces any existing script on the node. Undoable.

Script (.gd / .cs) reading, detachment, and outline.

Resource form: godot://script/{path} — prefer for active-session reads.

Ops: • read(path) Read full source, line count, file size. • detach(path) Remove the currently attached script from a node. Undoable. • find_symbols(path) Outline a script. .gd: class_name, extends, functions, signals, @export vars. .cs: class, base type, methods, [Signal] delegates, [Export] members. Response language says which parser ran.

Language support: GDScript is the full contract. C# (.cs) is text-only — files are written, read and outlined, but Godot AI does not build .NET or report C# compiler errors; inspect the editor Build panel or dotnet build terminal output. logs_read does not capture .NET compiler output.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Resource (asset) search, inspection, assignment, and creation. Covers generic Resource subclasses plus specialized authoring (Curve, Environment, physics shapes, gradient/noise textures).

Ops: • search(type="", path="", offset=0, limit=100) Search for resources by type or path. Type matching includes subclasses. At least one filter required. Paginated. • load(path) Inspect a .tres / .res — returns type and editor-visible properties. • inspect(node_path, property, depth=2) Read a live native resource graph without loading or modifying files. Depth 0..3; shared references, omission reasons, fixed traversal and 64 KiB encoded-result limits. Scripted/dynamic properties excluded. • assign(path, property, resource_path) Load and assign a resource to a node property. Undoable. • get_info(type) Introspect a Resource class — properties, parent, abstract flag, concrete_subclasses (for abstract bases). Read-only. • create(type, properties=None, path="", property="", resource_path="", overwrite=False) Instantiate a Resource subclass. Either path+property (assign to a node, undoable) or resource_path (save to .tres). For specific families (Curve, Environment, etc.) prefer the dedicated ops. • curve_set_points(points, path="", property="", resource_path="") Replace all points on a Curve / Curve2D / Curve3D. Auto-creates the curve resource if the slot is empty (curve_created flag). • environment_create(path="", preset="default", properties=None, sky=None, resource_path="", overwrite=False) Build Environment + Sky chain. Presets: default | clear | sunset | night | fog. sky may be bool or a procedural sky dict such as {"sky_material": "procedural", "sky_top_color": "#0f172a"}. Either assign to a WorldEnvironment node or save .tres. • physics_shape_autofit(path, source_path="", shape_type="") Size a CollisionShape2D/3D to a nearby visual's bounds. Searches direct siblings then parent-siblings (handles nested Body→Collision layouts). Ambiguous matches return candidate paths in error.data.candidates. Auto-creates the concrete Shape subclass if needed. shape_type accepts either the short form ("box", "sphere", "capsule", "cylinder" for 3D; "rectangle", "circle", "capsule" for 2D) or the matching Godot class name ("BoxShape3D", "RectangleShape2D", etc.). • physics_shape_generate(paths, shape_type="box", body_type="static", reparent_mesh=False, scene_file="", overwrite=False) Generate a physics body sibling (named Collider) with a CollisionShape3D for every MeshInstance3D path. Shapes are fitted in body-local space; a mesh that already has a collider sibling, a duplicate path, or a scene-root mesh is refused before anything is written. shape_type: auto | box | sphere | capsule | cylinder | convex | trimesh (or the class name for explicit shapes). Opt-in auto selects matching primitives for BoxMesh, SphereMesh, CapsuleMesh and CylinderMesh, with box bounds for every other mesh. The default remains box. Auto uses bounding fits (including tapered cylinders), not exact mesh geometry. convex/trimesh derive the shape from the mesh's own triangles, with the mesh scale baked into the shape, and are limited to 2048 triangles and 6144 vertices per mesh, with bounded mesh types (the hull build runs synchronously inside one editor-frame item); trimesh needs a static or area body, and a non-uniformly scaled parent chain refuses every type except box. body_type: static | area | rigid | character. rigid/character always wrap the mesh under the generated body (a detached dynamic body would fall away from the stationary visual); reparent_mesh=True does the same for static/area while preserving the mesh's world transform, and the reported mesh_path is then the post-move path. overwrite=True refreshes only a marked generated collider's shape and collision transform, preserving body/collision identity and user settings. Requested body type and wrapping must match; unmarked legacy bodies or broken provenance links are refused. Mixed fresh/refresh batches prepare all resources before one undo action; stale edits refuse the batch. scene_file pins the request to that edited scene. Up to 1024 paths are processed in bounded work across editor frames; inside batch_execute at most 16. The bulk write is one undo action. Returns: {created: [{mesh_path, body_path, shape_path, shape_type, body_type, operation: "create"|"refresh"}], undoable: true}. • gradient_texture_create(stops, width=256, height=1, fill="linear", path="", property="", resource_path="", overwrite=False) Build GradientTexture2D from color stops. fill: linear | radial | square. • noise_texture_create(noise_type="simplex_smooth", width=512, height=512, frequency=0.01, seed=0, fractal_octaves=0, path="", property="", resource_path="", overwrite=False) Build NoiseTexture2D wrapping FastNoiseLite. Noise types: simplex | simplex_smooth | perlin | cellular | value | value_cubic.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Inspect Godot API documentation-shaped metadata from the connected editor's ClassDB: "what properties does X have", method signatures, signals, enums, constants, defaults, and property hint strings.

Resource form (prefer for active-session reads): godot://class/{class_name}

Ops:

• get_class(class_name, sections=None, include_inherited=False, include_inheritors=False, offset=0, limit=100) Return selected class-reference sections without creating a scene instance. sections may be a comma-separated string or list containing properties, methods, signals, enums, constants, inheritors. Defaults to ["properties"] only — a bare get_class answers "what properties does X have" without the multi-thousand-token full dump. Pass the sections you want by name, or "all" for the full set (properties, methods, signals, enums, constants). "all" does NOT include the heavier "inheritors" section — request that by name. For pagination, request one section at a time so offset/limit apply only to the list you are paging.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Project filesystem access via the Godot editor's EditorFileSystem.

Ops: • read_text(path) Read a text file at a res:// path. Returns content, size, line_count. • write_text(path, content="") Create or overwrite a text file. Updates the editor filesystem entry for that one file (single-file update, not a full scan). Newly-created files include data.cleanup.rm for transient smoke tests; overwrite omits the field. • reimport(paths) Force-reimport the listed files via EditorFileSystem.update_file. paths is a list of res:// paths. Intended for imported assets such as textures, models, and audio. Paths that are not imported resources (.gd scripts, .tscn, hand-written .tres, or an asset the editor has not imported yet) report under skipped_non_imported rather than reimported: their filesystem entry is refreshed, but no import runs, so a success there is not evidence that a script parsed or that diagnostics were produced. Use script_patch/script_create to save a script and receive fresh diagnostics, or scan for an asset awaiting its first import. Returns reimported, skipped_non_imported, not_found and their counts. • scan() Force a full EditorFileSystem.scan() and wait for it to settle. This is the headless equivalent of the editor regaining window focus: write_text/script_create register single files but do NOT rebuild the global class_name table, so a freshly-created class_name MyThing extends Resource is invisible to resource_manage/type references until a scan runs. Call this once after adding class_name scripts when the editor isn't focused. Single-flight (awaits any in-progress scan rather than stacking another). Returns scan_completed and global_classes_registered_delta. • search(name="", type="", path="", offset=0, limit=100) Find files by name, resource type, or path substring. At least one filter must be set. Paginated. • move(path, new_path), rename(path, new_name) Move a resource group with .uid/.import sidecars and preserve proven UID references. Destination parent must exist. Literal-path owners, project settings, open scene tabs, links and incomplete discovery are refused before mutation; dependency rewriting is unsupported. • remove(path, force=False, permanent=False) Default: OS trash. Known references block unless force=True; force never overrides incomplete discovery or protected paths. Permanent deletion supports files only. Directory deletion uses trash.

move/rename/remove contract: Mutations require a direct call, not batch_execute. Directory results set scan_required: call scan afterward. All mutations are non-undoable. Errors report outcome unchanged/rolled_back/partial and actual affected paths. Never blindly retry a partial result.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Configure AI clients to use this Godot AI MCP server. Writes / removes client config files (Claude Code, Codex, Antigravity, Cursor, Devin Desktop (Windsurf), Zed, etc.).

Ops: • status() List every supported client with id, display_name, status (configured | not_configured | configured_mismatch | error), and installed flag. • configure(client) Write the MCP server entry into the named client's config file. client is one of the ids returned by status(). • remove(client) Remove this server's entry from the named client's config.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Signals (Godot's event/observer mechanism) — list, connect, disconnect.

Ops: • list(path, include_editor=False) List all signals on the node and their current connections (built-in and custom). By default editor-internal connections (the SceneTreeEditor dock and friends) are filtered out — pass include_editor=True to surface them. The response carries editor_connection_count so an agent can tell how many were hidden. • connect(path, signal, target, method) Connect a signal from path to a method on the target node. Undoable. • disconnect(path, signal, target, method) Remove an existing connection. Undoable.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Autoload (global singleton) management. Autoloads are scripts or scenes loaded automatically at project start, accessible globally by name when singleton=True. Persisted to project.godot.

Ops: • list() List autoloads with name, path, and singleton flag. • add(name, path, singleton=True) Register an autoload (script or PackedScene) by res:// path. • remove(name) Unregister an autoload by name. The underlying file is not deleted.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

InputMap actions and bindings (keyboard, mouse, gamepad). Persisted to project.godot.

Resource form: godot://input_map — prefer for active-session reads.

Ops: • list(include_builtin=False) List input actions and their bound events. By default only user-authored actions (those persisted in project.godot under input/<name>) are returned; pass include_builtin=True to also surface Godot's ui_* and editor-runtime actions (spatial_editor/*, etc.). The is_builtin field on each entry is true for any action not authored by the user. • add_action(action, deadzone=0.5) Create a new empty input action. deadzone must be in [0.0, 1.0] — Godot uses it as the analog-stick dead-zone threshold; values outside this range are rejected with VALUE_OUT_OF_RANGE. Typical values are 0.2-0.5; leave the default 0.5 unless you have a reason. Not a key-repeat delay. • ensure_action(action, deadzone=0.5) Idempotently create or persist an input action. If the action exists in live InputMap or in project.godot, the existing state is preserved. • remove_action(action) Remove an action and all its event bindings. Also removes actions persisted in project.godot but not loaded in the live InputMap (loaded_in_input_map: false in list), e.g. actions created by a previous editor session. • bind_event(action, event_type, keycode="", ctrl=False, alt=False, shift=False, meta=False, button=None, axis=None, axis_value=1.0) Bind a key/mouse/gamepad event to an action. The action must already exist (call add_action first). event_type is "key" | "mouse_button" | "joy_button" | "joy_axis". - key: keycode is a Godot keycode name string like "A", "Space", "Enter", "Escape", "F1", "Left" — not an integer and not KEY_*. Modifier booleans ctrl / alt / shift / meta optional. - mouse_button: button is an int — 1=left, 2=right, 3=middle, 4=wheel up, 5=wheel down. - joy_button: button is the JoyButton index (e.g. 0=A/Cross, 1=B/Circle). - joy_axis: axis is the JoyAxis index and axis_value is the direction/value, usually -1.0 or 1.0. • ensure_binding(action, event_type, ...) Idempotently ensure the action exists and has the requested binding.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Runtime game inspection and input simulation.

These ops target the running game process through Godot's EngineDebugger bridge. Start the project first with project_run and poll editor_state until game_capture_ready=true.

Ops:

• get_scene_tree(depth=10, root_path="") Inspect the running scene tree. root_path accepts an absolute runtime path or a scene-relative path rooted at the current scene.

• get_node_info(path, include_properties=True) Inspect one running node's metadata and optional property snapshot.

• get_ui_elements(root_path="", include_hidden=False, include_disabled=True, max_depth=10) Inspect visible runtime Control nodes for UI testing. Includes path, type, text where present, disabled state, and rect metadata.

• suspend() Suspend the running game through Godot's native debugger path.

• resume() Resume a suspended game. Idempotent when it is already running.

• next_frame() Advance exactly one process tick while suspended. The response reports verification and any Embedded Game View focus handoff. Runtime-control mutations also report path="embed_signal" or "direct_session"; the direct fallback works without embedding but cannot synchronize the Game View suspend button's visual pressed state.

• debug_status() Probe suspend state and the game-helper process tick counter through the debugger capture, including while SceneTree processing is suspended.

• input_key(key, pressed=True, echo=False) Send a key press/release to the running game.

• input_mouse(event, position=None, button="left", pressed=True) Send a mouse motion or button event. event: "motion" | "button". position is a {x, y} object or [x, y] array; omit it to use the game's current cursor position. A present but malformed position is rejected rather than silently falling back to the cursor.

• input_gamepad(device=0, control="button", index=0, pressed=True, value=0.0) Send a joypad button or axis event. control: "button" | "axis".

• input_action(action, pressed=True, strength=1.0) Set a project action's pressed state directly in the running game.

• input_sequence(steps, settle_frames=0) Apply a frame-timed action timeline in one call — the frame-accurate, multi-step form of input_action. Each step is {at_frame, action, pressed=True, strength=1.0}; the game applies each step's action on its scheduled frame, awaits settle_frames more, then replies once. Use this instead of separate input_action calls whenever timing matters (jump arcs, combos, walk-into-trigger): per-call network latency makes hitting a target frame impossible otherwise. Steps must be ordered by non-decreasing at_frame; frames (not ms) are the timing basis. Action-based input is focus-independent, so it works on a backgrounded game window. Cannot run inside batch_execute.

• input_state(actions=None) Read current action pressed states. Empty actions = all project actions.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Run GDScript test suites inside the connected Godot editor.

Discovers test_*.gd in res://tests/, instantiates them, and runs all test_* methods. Returns a compact summary by default (counts, suite names, duration) plus failures only. verbose=True includes every individual test result (each with per-test duration_ms).

Preloaded GDScript dependencies may remain stale after source edits; the response includes cache_warning. Restart the editor before using a rerun to validate dependency edits. ResourceLoader cache modes alone do not refresh the GDScript preload cache.

The whole run has a 300s budget; the plugin aborts between tests shortly before it expires and returns TEST_RUN_TIMEOUT with the partial summary (full partials via test_manage(op="results_get")). Long suites are safe — the editor services the MCP transport between tests — but one single test blocking the main thread for 20s+ can still drop the session. Not allowed inside batch_execute.

The response includes edited_scene (the scene currently open in the editor). Many suites assume the project's main scene is open; if it is not and there are failures, the response also carries a scene_warning — open the main scene (scene_open) and re-run before treating those failures as real.

Test result inspection (re-fetches the most recent test_run payload).

Resource form: godot://test/results — prefer for active-session reads.

Ops: • results_get(verbose=False) Same shape as test_run — full results from the last run, no re-execution. verbose=True includes every individual test result.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Execute a list of editor sub-commands in order, stopping on first error.

Each item must be {"command": "<plugin_command>", "params": {...}}. Use the underlying plugin command names (e.g. create_node, set_property, delete_node, attach_script), not the MCP tool names. Commands run sequentially; execution stops at the first error. When undo is True (default), any successful sub-commands are rolled back via the scene's undo history if a later sub-command fails, producing atomic-on-failure semantics.

Use this to compose multi-step edits (create node + set property + attach script) into a single tool call. Rollback works for sub-commands that modify the currently edited scene. batch_execute itself is not allowed as a sub-command.

Scene paths are relative to the edited scene root (e.g. "/Main/Enemy"), NOT runtime "/root/..." paths. The example below assumes the scene root is named "Main" — substitute the actual root name.

UI / Control authoring (HUD, menus, layouts, vector decoration).

Ops: • set_anchor_preset(path, preset, resize_mode="minsize", margin=0) Apply a Control layout preset. preset: top_left | top_right | bottom_left | bottom_right | center_left | center_top | center_right | center_bottom | center | left_wide | top_wide | right_wide | bottom_wide | vcenter_wide | hcenter_wide | full_rect. resize_mode: minsize | keep_width | keep_height | keep_size. Target must be a Control. CanvasLayer is the canonical HUD parent but is not a Control — put a Control child under the CanvasLayer and apply the preset to that overlay. • set_text(path, text) Set text on a Label/Button/LineEdit/TextEdit/RichTextLabel. • set_richtext(path, text, bbcode=True) Set a RichTextLabel's text with BBcode parsing on by default — "[color=red]HP[/color]" renders as markup, and bbcode=False writes literal text. Undoable. • build_layout(tree, parent_path="") Atomically build a UI subtree from a nested spec ({type, name?, properties?, anchor_preset?, anchor_margin?, theme?, children?}). Validates everything before mutating. properties is direct node properties only. Theme constants like container spacing live under theme_override_constants/<name> — e.g. {"theme_override_constants/separation": 8} on a VBoxContainer, not {"separation": 8} (which errors). theme and anchor_preset require a Control / Window — for a HUD, nest a Control under a CanvasLayer and apply them to the Control child, not the layer itself. • draw_recipe(path, ops, clear_existing=True) Attach a declarative list of vector _draw() ops to a Control — radar sweeps, gauges, corner brackets, crosshairs, waveforms. Op kinds: line | rect | arc | circle | polyline | polygon | string.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Theme authoring (Godot's stylesheet-like resource for Controls). Cascades down a Control subtree when assigned via theme_apply.

Stylebox numeric fields (border widths, corner radii, margins, shadow) must be finite numbers and stylebox flags (anti_aliasing, draw_center) must be real booleans; a non-numeric or non-finite value is refused with a structured error before anything is applied, so a refused call leaves the theme and undo history untouched.

Slot changes are persisted immediately: if the theme file cannot be written the call fails with an error, the previous slot is restored, and no undo entry is committed.

Ops (pass via op="..." plus a params dict): • create(path, overwrite=False) Create a new empty Theme .tres at a res:// path. • set_color(theme_path, class_name, name, value) Set a color slot. value: "#rrggbb"/"#rrggbbaa", named, or {"r","g","b","a"}. • set_constant(theme_path, class_name, name, value) Set an integer constant (separation, margin, padding). • set_font_size(theme_path, class_name, name, value) Set a font_size slot in pixels. • set_stylebox_flat(theme_path, class_name, name, bg_color?, border_color?, border?, corners?, margins?, shadow?, anti_aliasing?) Compose a StyleBoxFlat (panels, button states, line edits). border/corners/margins/shadow each accept "all" + per-side keys. • set_stylebox_texture(theme_path, class_name, name, texture_path, region?, margins?, axis_stretch_horizontal?, axis_stretch_vertical?, modulate_color?, draw_center?) Compose a 9-slice StyleBoxTexture from an imported image — pixel-art buttons and artwork-backed panels. region is {position, size} or [x,y,w,h]; margins are {all|left|top|right|bottom}; axis stretch modes are "stretch" | "tile" | "tile_fit". • set_font(theme_path, class_name, name, font_path) Assign a Font resource (FontFile .ttf/.otf, FontVariation) to a font slot. Loads the imported resource from res://. • set_icon(theme_path, class_name, name, texture_path) Assign a Texture2D to an icon slot (checkbox marks, dropdown arrows). • stylebox_override(path, slot, patch) Per-node stylebox override: duplicate the stylebox the Control resolves for slot, apply a StyleBoxFlat patch (same keys as set_stylebox_flat; unknown top-level keys are refused), and attach it via add_theme_stylebox_override. The action lands in the scene's undo history, so the editor's scene undo restores the previous override or removes it. The zero-border angular-frame / flash-the-bar-bg pattern without mutating the theme. • apply(node_path, theme_path="") Assign the theme to a Control (cascades to descendants). Empty theme_path clears.

All ops accept session_id on the wrapper to target a specific editor.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Create a new Animation clip inside an AnimationPlayer's default library.

After creating the clip, add tracks via animation_manage ops add_property_track / add_method_track / create_simple. Track node paths are stored relative to the AnimationPlayer's root_node (default: its parent), not to the scene root — see animation_manage preset ops for a forgiving target_path that accepts either form. If player_path doesn't resolve, an AnimationPlayer is auto-created at that path (parent must exist).

AnimationPlayer authoring (player, tracks, autoplay, presets, playback).

Ops: • player_create(parent_path, name="AnimationPlayer") Create an AnimationPlayer with empty default library. • delete(player_path, animation_name) Delete an animation clip from the default library. Undoable. • validate(player_path, animation_name) Check all track paths resolve. Returns broken_count + per-track issues. • add_property_track(player_path, animation_name, track_path, keyframes, interpolation="linear") Add a property track. track_path: "NodeName:property". keyframes: [{time, value, transition?}, ...]. interpolation: linear|nearest|cubic. • add_method_track(player_path, animation_name, target_node_path, keyframes) Add a method track. keyframes: [{time, method, args?}, ...]. • set_autoplay(player_path, animation_name="") Set autoplay. Empty animation_name clears. • play(player_path, animation_name="") Editor preview. Not saved with scene. • stop(player_path) Stop editor preview. Not saved with scene. • list(player_path) List animations with length, loop_mode, track_count. • get(player_path, animation_name) Inspect a clip's tracks and keyframes in detail. • create_simple(player_path, name, tweens, length=None, loop_mode="none", overwrite=False) High-level: build a multi-track clip from tween specs in one call. tweens: [{target, property, from, to, duration, delay?, transition?}]. • preset_fade(player_path, target_path, mode="in", duration=0.5, animation_name="", overwrite=False) One-call fade-in/out (modulate.a). • preset_slide(player_path, target_path, direction="left", mode="in", distance=None, duration=0.4, animation_name="", overwrite=False) One-call slide-in/out (position). • preset_shake(player_path, target_path, intensity=None, duration=0.3, frequency=30.0, seed=0, animation_name="", overwrite=False) One-call shake (jittered position). • preset_pulse(player_path, target_path, from_scale=1.0, to_scale=1.1, duration=0.4, animation_name="", overwrite=False) One-call pulse / hover-bounce (3-keyframe scale ping-pong).

Preset target_path: accepts either a scene-absolute path (e.g. "/Main/World/Cube", matching every other scene tool) or a path relative to the AnimationPlayer's root_node (e.g. "World/Cube", matching how Animation tracks store node paths). Scene-absolute targets outside the player's root_node subtree are converted to a ..-prefixed track path via root_node.get_path_to(target), the same shape the relative form already accepts.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Material authoring (StandardMaterial3D, ORMMaterial3D, ShaderMaterial, CanvasItemMaterial), raw shader source (.gdshader / .gdshaderinc), and VisualShader graph authoring/editing. Albedo, metallic/roughness, emission, transparency, shader uniforms, render modes.

Resource forms: godot://materials (all materials), godot://shader/{path} (raw source + metadata), godot://visual_shader/{path} (VisualShader graph).

Ops: • visual_shader_create_graph(resource_path, stages, shader_type="spatial", overwrite=False, varyings=None) Create/save a VisualShader .tres only (not undoable). Each stages entry is {stage, nodes: [{id, type, position?, params?}], connections: [{from_node, from_port, to_node, to_port}]}. Explicit stages must match spatial/canvas_item (vertex/fragment/light), particles (start/process/collide/start_custom/process_custom), sky (sky), or fog (fog). IDs are stage-local integers >=2 or nonempty strings; output is "output"/0. Limits: 256 nodes, 1024 connections total. Existing destination directory required. Returns id_map by stage as [{id, node_id}] in request order. varyings: [{name, mode: "vertex_to_frag_light"|"frag_to_light", type: "float"|"int"|"uint"|"vector2"|"vector3"|"vector4"|"boolean"|"transform"}] (spatial/canvas_item only). The generated source is parsed through the engine's shader compiler before saving; a graph it rejects (for example a parameter named after a shader keyword) is not written. Renderers that cannot compile a shader type fall back to validating the generated declarations, so the advertised modes stay accepted. Use create(type="shader", shader_path=<saved .tres>) then assign separately. • visual_shader_get(path) Inspect a VisualShader .tres: shader_type, per-stage nodes (id, type, position, params), connections, and varyings. Use before visual_shader_edit. • visual_shader_node_catalog(filter="", offset=0, limit=100) List instantiable VisualShaderNode classes with the properties this tool accepts, plus legacy aliases. Discover valid node types and params before authoring a graph. • visual_shader_edit(resource_path, operations) Apply a validated operation list to an existing VisualShader .tres: add_node / remove_node / replace_node / set_node_params / set_node_position / connect / disconnect / add_varying / remove_varying. Operations run in order; string node ids added by the call are returned in added and can be referenced by later operations. The whole result is validated in memory, then saved atomically; not undoable. • create(path, type="standard", shader_path="", overwrite=False) Create + save a material .tres at a res:// path. type: "standard" | "orm" | "canvas_item" | "shader". For "shader", shader_path points to a .gdshader or VisualShader .tres. • set_param(path, param, value) Set a built-in property on a .tres material. Enum-valued params accept names ("alpha" -> TRANSPARENCY_ALPHA). Color/Vector dicts. Texture properties accept res:// paths. • set_shader_param(path, param, value) Set a shader uniform on a ShaderMaterial. • get(path) Inspect a material (type, params, uniforms, current values). • list(root="res://", type="") List materials under root, optional type filter. • assign(node_path, resource_path="", slot="override", create_if_missing=False, type="standard") Assign a material to a node slot. Slots: "override" | "surface_" | "canvas" | "process". When create_if_missing=True and no resource_path, makes an inline material of type. • apply_to_node(node_path, type="standard", params=None, slot="override", save_to="", overwrite=False) High-level: build + set params + assign in one undo. save_to optionally persists to disk; errors if the file already exists unless overwrite=True. • apply_preset(preset, path="", node_path="", overrides=None) Curated looks: metal, glass, emissive, unlit, matte, ceramic. path saves to disk; node_path assigns to a node; overrides merge. • shader_create(resource_path, code, overwrite=False, shader_type="spatial") Create/replace a raw .gdshader (or .gdshaderinc include) from source text. The code is parsed through Godot's shader compiler for the declared shader type before anything is written: parse errors reject the write with diagnostics and leave any existing file untouched. This is parse/type validation, not a guarantee that every renderer variant compiles. Returns shader_type, uniforms (type, hint, hint_string, default), and cleanup hints. Not undoable. • shader_get(path) Read a .gdshader/.gdshaderinc: full source, shader_type, uniforms, render modes, and #include list. • shader_validate(code, kind="shader", shader_type="spatial", base_dir="") Parse/type-check shader source without writing a file. Returns valid plus errors/warnings. Pass base_dir (a res:// directory) to validate relative #include resolution against where the shader will live. Renderer-specific variant compilation is out of scope. • shader_patch(path, old_text, new_text, replace_all=False) Anchor-based edit of a shader file: exact substring match, result revalidated before the file is replaced. Not undoable.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Particle systems (GPUParticles2D/3D, CPUParticles2D/3D). All write ops create the node + sub-resources (ProcessMaterial, default QuadMesh draw pass) in a single undo action.

Ops: • create(parent_path, name="Particles", type="gpu_3d") Create an emitter. type: "gpu_3d" | "gpu_2d" | "cpu_3d" | "cpu_2d". For GPU emitters, auto-creates ProcessMaterial; for gpu_3d, also a default QuadMesh draw pass. • set_main(node_path, properties) Node-level props: amount, lifetime, one_shot, explosiveness, preprocess, speed_scale, randomness, fixed_fps, emitting, local_coords, interp_to_end. • set_process(node_path, properties) Behavior props (auto-creates ProcessMaterial for GPU). Emission shape, velocity, gravity, color_ramp, scale_curve, turbulence. See full property list in the Godot reference. GPU gravity is a Vector3 — pass {x, y, z} or [x, y, z], including for gpu_2d (the shared ProcessMaterial is 3D; z is ignored in 2D). • set_draw_pass(node_path, pass_=1, mesh="", texture="", material="") What gets drawn per particle. GPU 3D: mesh in draw_pass_N + optional material override. GPU 2D / CPU 2D: texture. CPU 3D: mesh. • restart(node_path) Restart emission. Runtime-only, not undoable. • get(node_path) Inspect main props, process material, draw passes. • apply_preset(parent_path, name, preset, type="gpu_3d", overrides=None) Curated effects: fire, smoke, spark_burst, magic_swirl, rain, explosion, lightning. One-shot presets re-trigger via restart. overrides = {"main": {...}, "process": {...}, "draw": {...}}; bare keys are auto-routed to main (amount, lifetime, one_shot, ...) or process — draw keys must be nested under "draw". draw configures the gpu_3d draw-pass StandardMaterial3D (blend_mode, albedo_color, emission, ...); on gpu_2d only draw.texture (res:// path) applies; cpu_* types reject draw overrides. Unknown or malformed override keys return INVALID_PARAMS (never silently dropped); response reports applied_main / applied_process / applied_draw. GPU gravity requires {x, y, z} (or [x, y, z]) even for gpu_2d.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Camera2D / Camera3D authoring (zoom, FOV, projection, smoothing, follow).

Ops: • create(parent_path, name="Camera", type="2d", make_current=False) Create a Camera2D ("2d") or Camera3D ("3d"). When make_current=True, unmarks previously current cameras of the same class in one undo. • configure(camera_path, properties) Batch-set camera-specific properties (zoom, fov, projection, smoothing, drag, limits …). Class-aware. Enum-by-name (projection, keep_aspect, anchor_mode, doppler_tracking, process_callback). Vector2 dict coercion for zoom/offset. Transforms (position, rotation, scale, transform, global_*) live on the Node — set those via node_set_property, not here. • set_limits_2d(camera_path, left?, right?, top?, bottom?, smoothed?) Set Camera2D bounds. Pass only the edges to change. • set_damping_2d(camera_path, position_speed?, rotation_speed?, drag_margins?, drag_horizontal_enabled?, drag_vertical_enabled?) Smooth Camera2D motion (position/rotation smoothing speeds + drag deadzone). drag_margins: {left,top,right,bottom} fractions [0,1]. • follow_2d(camera_path, target_path, smoothing_speed=5.0, zero_transform=True) Reparent camera under target with smoothing — Godot-native follow. • get(camera_path="") Inspect a camera (class, current flag, all properties). Empty path resolves to the currently-active camera, falling back to the first. • list() List every Camera2D/Camera3D in the scene. • apply_preset(parent_path, name, preset, type=None, make_current=True, overrides=None) Spawn with opinionated defaults. Presets: topdown_2d, platformer_2d, cinematic_3d, action_3d. overrides merge over preset values.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Sound effects, music, ambience (AudioStreamPlayer / 2D / 3D).

Ops: • player_create(parent_path, name="AudioStreamPlayer", type="1d") Create an AudioStreamPlayer / 2D / 3D node. type: "1d" | "2d" | "3d". • player_set_stream(player_path, stream_path) Assign an AudioStream resource (.ogg/.wav/.mp3 or .tres). Returns duration_seconds. • player_set_playback(player_path, volume_db?, pitch_scale?, autoplay?, bus?) Update common playback properties atomically. Pass only fields to change; at least one of volume_db/pitch_scale/autoplay/bus required. • play(player_path, from_position=0.0) Start real editor preview playback. Not undoable. • stop(player_path) Stop editor preview playback. Not undoable. • list(root="res://", include_duration=True) Scan project for AudioStream resources (every subclass + .tres/.res).

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

TileMap / TileMapLayer authoring (set tiles, fill rects, clear, read cells).

All operations target TileMapLayer nodes in the currently edited scene by scene-relative path (e.g. "/LavaLake20x20/Ground"). All write ops are undoable via EditorUndoRedoManager.

source_id is the TileSet source index. atlas_col/atlas_row are the atlas coordinates of the tile within that source. For full-tile animated sources (lava, water, sewage) use atlas_col=0, atlas_row=0.

IMPORTANT — Source-ID remapping in specialized .tres files: When a layer uses a specialized .tres (e.g. volcano_animated.tres), Source-IDs are re-numbered from 0. Example: volcano lava is Source 8 in the main volcano.tres but Source 0 in volcano_animated.tres. Always use the remapped ID when the TileMapLayer references a specialized .tres, not the original ID from the main .tres.

Ops: • tilemap_set_cell(path, source_id, atlas_col, atlas_row, map_x, map_y) Set a single tile at (map_x, map_y). Returns: {map_x, map_y, source_id, atlas_col, atlas_row}

• tilemap_set_cells_rect(path, source_id, atlas_col, atlas_row, rect_x, rect_y, rect_w, rect_h) Fill a rect_w × rect_h region starting at (rect_x, rect_y) with one tile type in a single undo action. Returns: {cells_filled, rect: {x, y, w, h}}

• tilemap_clear(path) Remove all tiles from the layer. Returns: {cleared: true}

• tilemap_get_cells(path) Return all used cell coordinates. Returns: {cells: [{x, y}, ...], count: int}

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

TileSet management — atlas inspection tools.

Ops: • tileset_get_atlas_tiles(tileset_path, source_id) Return all occupied atlas tile positions for one source in a TileSet. Read-only — does not modify any resource or project file.

    tileset_path: res:// path to the .tres TileSet resource (required)
    source_id:    raw TileSet source id of the TileSetAtlasSource to query (required, ≥ 0)

    Returns:
      {"tiles": [{"col": int, "row": int}, ...], "count": int}

    Error codes (passed through from GDScript handler):
      MISSING_REQUIRED_PARAM  — tileset_path empty or source_id absent
      RESOURCE_NOT_FOUND      — tileset_path does not exist on disk
      WRONG_TYPE              — not a TileSet, or source is not a TileSetAtlasSource
      VALUE_OUT_OF_RANGE      — source_id does not exist in this TileSet

• tileset_get_atlas_image(tileset_path, source_id, max_size=0) Return the atlas sprite-sheet texture of a TileSetAtlasSource as a Base64-encoded PNG image. Read-only — reads the texture directly from the resource without any UI interaction.

    tileset_path: res:// path to the .tres TileSet resource (required)
    source_id:    raw TileSet source id of the TileSetAtlasSource to query (required, ≥ 0)
    max_size:     optional int; if > 0, scale the image so its longest
                  edge is at most max_size pixels (default 0 = full res)

    Returns:
      {"image_base64": str, "width": int, "height": int,
       "original_width": int, "original_height": int, "format": "png"}

    Error codes (passed through from GDScript handler):
      MISSING_REQUIRED_PARAM  — tileset_path empty or source_id absent
      RESOURCE_NOT_FOUND      — tileset_path does not exist on disk
      WRONG_TYPE              — not a TileSet, source not a TileSetAtlasSource,
                                or source has no texture assigned
      VALUE_OUT_OF_RANGE      — source_id does not exist in this TileSet

• Atlas image workflow: To visually inspect what tiles look like, use tileset_get_atlas_image instead of editor screenshots. It reads the texture directly from the resource — no UI interaction or editor state required.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

GridMap authoring (set items, fill 3D regions, clear, read cells + library items).

All operations target GridMap nodes in the currently edited scene by scene-relative path (e.g. "/Main/Terrain"). All write ops are undoable via EditorUndoRedoManager.

item is the item id from the GridMap's MeshLibrary. Use gridmap_list_library_items to discover valid ids and names before placing cells (the 3D analogue of tileset atlas inspection). orientation is the GridMap baked rotation index (0..24).

Ops: • gridmap_set_item(path, item, map_x, map_y, map_z, orientation=0) Set a single cell item at (map_x, map_y, map_z). item=-1 erases. Returns: {map_x, map_y, map_z, item, orientation}

• gridmap_fill(path, item, rect_x, rect_y, rect_z, rect_w, rect_h, rect_d, orientation=0) Fill a rect_w × rect_h × rect_d region starting at (rect_x, rect_y, rect_z) with one item in a single undo action. Returns: {cells_filled, rect: {x, y, z, w, h, d}}

• gridmap_clear(path) Remove all cells from the GridMap. Returns: {cleared: true}

• gridmap_get_used_cells(path) Return all used cell coordinates. Returns: {cells: [{x, y, z}, ...], count: int}

• gridmap_list_library_items(path) List the MeshLibrary items available to the GridMap. Returns: {library, items: [{item, name, mesh}...], count: int}

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

Bounded 3D mesh-only navigation baking and 2D/3D path queries on an explicitly selected map.

Ops: • bake(path, scene_file="", force_sync=True) Bake a 3D region from bounded mesh-only children. Requires NavigationMesh root-children source mode and mesh-instance or both geometry settings. Supports unscripted Node / Node3D containers and MeshInstance3D using plain ArrayMesh, BoxMesh, PlaneMesh, SphereMesh, CylinderMesh or CapsuleMesh. Rejects other source nodes/settings (groups, colliders, CSG, GridMap, obstacles); custom source parser callbacks are never invoked. 2D baking is unsupported. Limits: 256 source nodes, 2048 triangles, 6144 vertices in total, 32 surfaces per ArrayMesh, and 1000000 estimated voxel cells. Source collection advances one bounded node per editor frame, then the engine bakes the collected snapshot asynchronously. These input limits are not a hardware-independent per-frame timing guarantee. Replies are deferred with a 30 s deadline; source edits abort the operation. Cancellation restores the old region resource; an already-started engine task may finish into its detached working copy. parse_ms reports collection time. force_sync=True pushes the result and synchronizes the map; False leaves map synchronization to the engine. Undo/redo restore exact retained resources. Only one bake per region; call directly, not in batch_execute. Resource form: none - per-region write. • path_get(from_point, to_point, dimension="3d", optimize=True, navigation_layers=1, region_path="", force_sync=False) Query a path between two world points ({x,y[,z]} or [x,y[,z]]). region_path selects the NavigationRegion3D/2D whose map to query; when omitted the edited scene root's world map is used — the op never guesses a scene's "first" region. Read-only: force_sync=False (default) never touches the map's shared async-iteration policy; force_sync=True opts in to the same toggle + map_force_update that bake uses when the query must see a just-baked region immediately. Returns points, point_count. Resource form: none — per-query read.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

CSG authoring (create boolean shapes, set their operation).

Create CSG shapes (box, sphere, cylinder, torus, polygon) under a Node3D parent in the currently edited scene and set their boolean operation (union / intersection / subtraction) so geometry like holes, caves and tunnels can be carved directly in the editor. All write ops are undoable via EditorUndoRedoManager. Sibling CSG shapes under the same parent combine automatically; use a CSGCombiner3D parent for explicit grouping. Size, position and material live on the created node — set them with node_set_property / material_manage after creation.

Ops: • csg_create(parent_path, name="", shape="box", operation="union") Create a CSG shape under a Node3D parent (empty parent_path = scene root). shape: box | sphere | cylinder | torus | polygon. operation: union | intersection | subtraction. Returns: {path, name, shape, operation}

• csg_set_operation(path, operation) Set the boolean operation of a CSG shape. operation: union | intersection | subtraction. Returns: {operation}

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.

List or invoke custom tools registered by third-party addons.

Active session only. Use op="list" to discover registered tools. op="invoke" requires params: tool_name (string); optional: params (dict, forwarded to the addon handler unvalidated — shape per the tool's params_schema from op="list"). Inside batch_execute, address a custom tool as "custom_tool:" (deferred tools cannot run in batches). Some custom tools are also registered first-class as "custom_" with their own schema — prefer those when present.

Canonical call shape: {"op": "<verb>", "params": {...}}. Flat op parameters are accepted as a compatibility alias when the client transmits them; op and session_id remain top-level.