Unity Agent Bridge: Terminal Coding Control for Unity Editor (C# Source)

Your terminal coding agent can edit C#. Now it can also compile, run the tests, press Play and look at the game.

Agent Bridge is a small, editor-only Unity package that runs a token-protected HTTP server on the loopback interface inside the Unity editor, plus a one-file command line client. Any coding agent that has a shell (or any script) can drive the editor with it: compile and get file:line errors back, run EditMode or PlayMode tests, read the Console, dump the hierarchy, enter Play Mode, take a screenshot, read FPS and draw calls. The loop that used to need a human alt-tabbing to Unity now runs from the terminal.

WHAT YOU GET (instant download, ZIP)
• ShipYourGame-Agent-Bridge-1.0.0.unitypackage: full C# source, no DLLs, editor-only
• Quick-Start.pdf: install in 3 minutes, where the window is, the first three commands, what Safe Mode means, and the text block that tells your agent how to use it
• LICENSE.txt

INSIDE THE PACKAGE
• Command line client for bash (curl) and PowerShell: status, compile, tests, logs, hierarchy, scene, play / stop / pause / resume / step, screenshot, stats, exec
• compile waits through Unity's script reload and prints file:line:col errors, exit code 2 on errors
• tests runs EditMode or PlayMode with a filter; failures come back as text; no overlapping runs, stuck runs can be reset
• logs with an incremental cursor, hierarchy as a tree with components, screenshot of any camera even while the editor is in the background
• Editor window (Window > ShipYourGame > Agent Bridge): status, token copy / rotate, Safe Mode toggle, port and limits, list of recent requests
• Documentation: install, agent quick start, endpoint reference, security and threat model, troubleshooting
• 52 automated tests behind it

SAFE BY DEFAULT
• Listens on the loopback address only: other machines cannot connect
• New random token every editor session, required on every request
• Safe Mode is ON by default: the one command that runs arbitrary C# (exec) is refused until you switch it off in the window and confirm
• Browser requests are refused (no CORS), every request is logged to the Console

REQUIREMENTS
• Unity 2022.3 or newer (verified on Unity 6, 6000.6.0f1)
• curl for the bash client (macOS, Linux, Git Bash) or PowerShell 5.1+ on Windows
• Works with any coding agent that can run a shell command; it is not an agent itself and needs no plugin on the agent side
• Not a network service and not a sandbox: read the Safe Mode page in the PDF before turning it off

HOW IT WORKS
1. Buy, then download the ZIP from your Etsy purchases page.
2. In Unity: Assets > Import Package > Custom Package, pick the .unitypackage.
3. Open Window > ShipYourGame > Agent Bridge, click "Copy client scripts to tools/", run tools/agentbridge.sh status in a terminal. Paste the instructions block from the PDF into your agent's project instructions file. Done.

LICENSE
Use it in any number of your own projects, commercial or not, for one developer or one studio. Please do not resell, share or re-upload the source files themselves. Details in LICENSE.txt.

SUPPORT
Something not working? Send a message with your Unity version, your OS and the [AgentBridge] lines from the Console; you will get an answer within a day. Updates to 1.x are free: re-download from your purchases page.

This product was created with AI assistance (design, code and documentation were produced with the help of terminal coding agents and reviewed, tested and edited by ShipYourGame).

Made by ShipYourGame, a one-person game studio, for developers who would rather let the agent press Play.