dsh-godot — Godot capability family for DeepSeek Harness

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A family of Godot Engine plugins for the DeepSeek Harness agent harness: headless project tooling, GDScript semantic navigation, and a scripted debugger. Maintained as an independent repository; the packages build inside the harness monorepo workspace.

Features

The capabilities were migrated from godot-vscode-plugin (Godot Tools v2.7.1, ~700k installs), keeping the pure-logic cores; the migration is pinned by protocol facts recorded against a real Godot 4.7 instance. See docs/architecture.md for the module map and protocol-fact pointers.

Prerequisites

• Godot 4.2+. The CLI tools and the debugger require a Godot 4.2 or newer build with --headless support (spawn-mode LSP's version gate also accepts 3.6+).
• Host binaries, resolved at call time. godot (and gdformat for the default godot_format backend) are host installs, never bundled; a missing executable surfaces as the structured GODOT_UNAVAILABLE error at call time, never at load time.
• One-time project import. Headless game mode does not auto-import; run godot --headless --editor --path <root> --import --quit once per project, or expect a slower first run.
• Writable game user data. The game's user:// directory must be writable; game mode otherwise crashes with signal 11.

Installation

Mount like any harness plugin — one line in a cordis.yml composition, or ctx.plugin() in-process:

import { Context } from '@deepseek-ai/cordis'
import { LocalSubprocessRuntime } from '@deepseek-ai/dsh-subprocess-local'
import * as ToolGodot from '@deepseek-ai/dsh-tool-godot'
import * as GodotLsp from '@deepseek-ai/dsh-lsp-godot'
import * as ToolGodotDebug from '@deepseek-ai/dsh-tool-godot-debug'

// A deployment points at its godot install; the default resolves `godot` on PATH.
export async function mount(ctx: Context): Promise<void> {
  await ctx.plugin(LocalSubprocessRuntime)
  await ctx.plugin(ToolGodot, { executable: 'C:\\Godot\\godot.exe' })
  await ctx.plugin(GodotLsp, { connectMode: 'spawn', spawnExecutable: 'C:\\Godot\\godot.exe' })
  await ctx.plugin(ToolGodotDebug, { executable: 'C:\\Godot\\godot.exe' })
}

Configuration

Every key has a default; per-package details live in each package's README.

Model-facing tools

How it works

• LSP. Godot ships a TCP language server (EditorSettings network/language_server/remote_port, default 6005). lsp-godot attaches to a running editor, or spawns a headless one (--lsp-port) and pools providers per workspace; .gd queries (goToDefinition / findReferences / hover) are served through the harness ctx.lsp seam.
• Debugger. Godot's remote debugger speaks a custom binary protocol over --remote-debug — not DAP. Frames are [u32 LE length][variant-encoded array] of [command, threadId, params] (Godot 4.2+). godot_debug binds a pre-picked free port, spawns the game headless, snapshots the stack and locals/members/globals at each stop, and auto-continues up to maxStops.
• Scope. godot_debug v1 is a launch-only scripted run that owns its game process; attach-mode debugging and stateful sessions are future work.

Deployment notes

• Spawn modes write .godot/ import artifacts and may exceed the 60 s tool budget on large-project cold start (raise timeoutMs / spawnReadyTimeoutMs).
• Attach modes require the matching project open in a running Godot editor (LSP: the editor's language server on 127.0.0.1:6005).
• godot_debug terminates its game process on every path; a crashed harness can still orphan it.

Building from source

• The packages depend on @deepseek-ai/dsh-* workspace packages and build/test against the harness monorepo workspace (Node.js ^22.19 or >= 24, pnpm).
• To build fully standalone, switch those dependencies to the published npm versions (all required packages are public on npm) and provide your own test/lint/tsconfig setup.

Repository layout

• tool-godot/, lsp-godot/, tool-godot-debug/ — the three packages above (see architecture for the module map).
• docs/ — architecture documentation.

Testing

Tested on:

• OS: Windows 11 (build 26200)
• Shell: PowerShell 7 (7.6.3)
• Godot: 4.7 stable (console build)
• Node.js: 24 (v24.19.0)
• DSH: 0.1.0-rc.5 (harness monorepo workspace)

Run the unit suites from the monorepo root: pnpm exec vitest run packages/godot/lsp-godot packages/godot/tool-godot-debug. Real-Godot integration suites (e.g. the debugger smoke) are opt-in via GODOT_EXE.

Known limitations and deferred work

• Attach-mode debugging, dynamic breakpoints, scene-tree snapshots, multi-thread stops, lazy object expansion and variable editing are future work (the pinned protocol facts keep those paths open).
• The builtin formatter's whitespace rules follow godot-vscode-plugin, not gdformat.
• godot_format is read-only by design; the model applies changes through the file-policy surface.
• Breakpoints need a debug-capable binary; exported release builds may not deliver stops.
• A crashed harness can orphan a spawned godot process.
• Variable rendering follows the source plugin's display precision (toFixed(1) math types, toFixed(5) floats).

License

Released under the MIT License. See LICENSE for the full text.