T3 Code Signal Bridge

An unofficial bridge to start, answer and follow T3 Code threads from Signal:

• Message the bot to start a thread.
• Quote-reply to a bot message to answer its thread.
• Bot reacts 👀 when it gets your message and replies when its thread finishes.
• Let agents ask you questions and wait for your answer.

Installation

You need:

• T3 Code, on a Linux machine with systemd.
• Node.js 22.13 or later.
• A phone number for the bot. A cheap prepaid SIM or eSIM works; virtual numbers usually don't.

Run the installer on the machine where T3 Code runs:

npx t3-signal-bridge install

The installer asks for the bot's number, your Signal number and the project that new threads start in. It registers the bot with Signal, sends you a test message and starts the bridge as a background service.

On your phone, save the bot as a contact so that its messages notify you.

To change your settings, run npx t3-signal-bridge install again.

Usage

A message to the bot starts a thread in the project you chose during install. To start it in another project, begin the message with the project's name and a colon:

api: bump the dependencies

The project name is its T3 Code title in lowercase, with dashes for spaces, so "My API" becomes my-api.

To let agents ask you questions, add this line to your AGENTS.md or to a scheduled task's prompt:

If you can't continue without the owner's decision, run `signal-ask "<question>"` and end your turn. Their reply arrives as your next message.

Reference

| Command | What it does | | ------------------------------------ | -------------------------------------------------------------------------------------- | | npx t3-signal-bridge status | Shows whether the bridge's service is installed and running, and where its logs are. | | npx t3-signal-bridge@latest update | Installs the latest version and restarts the bridge. | | signal-ask "<question>" | Sends a question from the T3 Code thread it runs in. Pipe longer questions on stdin. | | npx t3-signal-bridge uninstall | Stops the bridge and removes its service. Keeps your config and the bot's Signal keys. |