S&box Editor Collaboration

Experimental — this library is still under active development and may change as it matures.

Github Repo: https://github.com/trookish/sbox-editor-collaboration/

Real-time collaboration for the s&box editor. One developer hosts a session and shares a join code; a friend opens the same project locally and joins with that code. Both then see each other in the scene as a floating sphere carrying a name and profile picture, and object moves and property changes appear live while they work.

Install and join

Install the library into your project: copy Libraries/collaboration/ into your project's Libraries/ folder, or add it through the Library Manager once it is published.
Host: open the Collaboration dock and click Host session. The first run writes ProjectSettings/collaboration.json for the project; copy the join code it shows.
Join: your friend opens the same project and pastes the code into the dock's join field.

Two conditions must hold before a friend can join, and the dock's Readiness card shows both: you are Steam friends and members of the same s&box organization, and your copies of the project are identical. Friends on different networks are connected through a relay; deploying the shared relay is covered in PUBLISHING.md.

The full documentation - architecture, security, admission gates, conflict handling, the one-click solo test, and the validation record - is in Libraries/collaboration/README.md.

What is in this Library

Path	Contents
`Libraries/collaboration/`	The library itself: the editor session, presence, dock UI, invite and relay protocol, plus its documentation.
`Tools/RelayWorker/`	The shared relay as a Cloudflare Worker, with its one-command deploy.
`Tools/Relay/`	An alternative self-hosted relay (ASP.NET Core) and its tests.
`Tools/CoreTests/`, `Tools/RelayTests/`	The test suites that gate every change.
`Tools/Compile/`	The editor compile gate.
`Tools/Run-SoloTest.ps1`	The one-click solo test: runs a full session against a disposable copy of your project.

The test project this library is developed in is intentionally not part of the repository.

Tests

dotnet run --project Tools/CoreTests/CoreTests.csproj     # engine-independent unit tests
dotnet build Tools/Compile/Compile.csproj -v q --nologo   # editor compile gate: 0 warnings, 0 errors
dotnet run --project Tools/RelayTests/RelayTests.csproj   # relay protocol tests

Publishing

PUBLISHING.md is the checklist for releasing the library to s&box: deploy the shared relay, run the gates, and upload the package with its icon (Libraries/collaboration/docs/icon.png).

License

MIT

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Package ID: cyn.sbox_editor_collab

Created: 2026-10-01 17:21 UTC

Updated: 2026-10-03 21:37 UTC

Type: library

Public: Yes

Version: 410152

files: 130

Size: 2.7 MB

Engine Version: 29

Asset Version ID: 410152

Version Created: 2026-10-03 21:37 UTC

Hash: 1791063435

Manifest: Open manifest

410152 Oct 3, 2026

Automatic project sync, internet relay, shared play

398959 Sep 30, 2026

1.2.0: three-section dock and in-editor relay setup

398710 Sep 30, 2026

Changes on 2026-09-30

398701 Sep 30, 2026

Initial Publish

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s&box Editor Collaboration (EXP)