Cobble

A self-hosted crew of small AI worker bots.

Cobble gives you a coordinator bot and a crew of workers, each with its own job, models, memory and workspace. The crew talks to you in a chat, shares workspaces, runs routines on a schedule, and drives its own computers: Docker sandboxes with a browser, terminal, code editor and desktop that a bot can use and hand back to you when it needs help.

It is an install, not a SaaS. One SQLite database, one Docker container, and your data on your own machine.

• Website: cobble.moduletrace.org
• Source: GitHub and Gitea
• License: MIT

Install

On a Linux machine with Docker (the installer adds Docker when it is missing):

curl -fsSL https://url.moduletrace.com/cobble | sudo bash

The app serves plain HTTP on the port it prints, usually http://<your-ip>:7227. Put a reverse proxy or tunnel in front of it for HTTPS (see HTTPS), then open the proxy's address and create the super admin account. The first signup also creates the coordinator and the main computer, which pulls the sandbox image in the background. Give it a few minutes.

Then open Settings > Models, add an OpenRouter key (or another provider) and wait for the model list to sync. This is what the bots think with.

Requirements

• Linux amd64 or arm64, with Docker. The installer installs Docker from get.docker.com when it is missing.
• 2 CPU cores, 8 GB RAM and 20 GB free disk for the app plus one computer. Each computer is its own container with its own memory limit.
• Docker Desktop on macOS works for development and small installs, but Linux is the supported host.
• Port 7227, or another port with --port.
• A reverse proxy or tunnel in front for HTTPS. The app itself serves plain HTTP and never handles certificates.

The installer binds to 0.0.0.0 so the app is reachable from your phone on the same network. Use --bind 127.0.0.1 when a reverse proxy is the only thing that should reach it.

HTTPS

Cobble serves plain HTTP. Terminate TLS in front of it with a reverse proxy (Caddy, nginx, Traefik) or a tunnel (Cloudflare Tunnel, Tailscale Serve), and point that at http://<this machine>:7227:

• Let the proxy set X-Forwarded-Proto: https. Cobble reads it to mark the sign-in cookies Secure; Caddy does this by default, and nginx needs proxy_set_header X-Forwarded-Proto $scheme;.
• Pass /ws through as well as ordinary requests, including the upgrade.
• Give the proxy a real certificate. Browsers treat plain HTTP as unsafe, so the installable app, offline support, Web Push notifications and voice recording stay off until the address is HTTPS.

Nothing on the machine needs a certificate installed: the browser only ever talks to the proxy. See the Help page in the app for the common proxy fixes.

Update and uninstall

The same script is the updater. It keeps the database, media, computers' home directories and generated secrets, backs up the database before replacing the container, and does nothing when the image has not changed.

curl -fsSL https://url.moduletrace.com/cobble | sudo bash

# Stop the app and keep the data
curl -fsSL https://url.moduletrace.com/cobble | sudo bash -s -- --uninstall

# Stop the app and delete the data
curl -fsSL https://url.moduletrace.com/cobble | sudo bash -s -- --uninstall --purge

Options

Option	Meaning
--home DIR	Install directory, default /opt/cobble
--data-dir DIR	Data directory mounted at /data, default HOME/data
--port PORT	Host port, default 7227
--bind ADDRESS	Host address to publish on, default 0.0.0.0
--image IMAGE	Container image, default ghcr.io/moduletrace/cobble
--version TAG	Image tag, default latest
--extra-network NET	Join another Docker network, for a tunnel or reverse proxy
--force	Recreate the container even when it is current
--no-pull	Use an image that is already on the machine
--skip-backup	Update without a database backup
--no-docker-install	Fail instead of installing Docker
--yes, -y	Accept the defaults without asking
--uninstall	Stop and remove the app container
--purge	With --uninstall, also delete the data directory

Data and settings

Everything that must survive an update lives under the install directory:

/opt/cobble/
  .env                  # generated once, mode 600
  install.conf          # installer state
  backups/              # pre-update database snapshots
  data/
    db/cobble
    db/.backups/
    media/
    computers/<id>/     # each computer's home directory

.env holds the port and the encryption keys. The keys encrypt sessions and settings, so keep a copy and do not rotate them without re-entering provider keys and other secrets. Provider keys, MCP servers, tools and app settings are managed in the app, not in .env.

Edit .env and run docker restart cobble to apply changes. The installer only appends missing values and keeps what is already there, apart from the port it manages.

The app container is started with the Docker socket mounted and MAIN_SERVER=1, so it can create computer containers and run cron, the queue and Web Push.

Images

Every release publishes a multi-arch image to both registries:

• ghcr.io/moduletrace/cobble
• git.tben.me/moduletrace/cobble

Tags are latest, the release version, major.minor and the commit sha. Install from Gitea with --image git.tben.me/moduletrace/cobble, or build from source with docker build -t cobble:local . and --image cobble --version local --no-pull.

Development

cp .env.example .env
# set ENCRYPTION_KEY and ENCRYPTION_SALT (openssl rand -hex 32)
bun install
bun run db:schema
bun run dev

Open http://localhost:7227. With no users, every page goes to /auth/signup to create the super admin. For a headless setup:

SEED_SUPER_ADMIN_PASSWORD=... bun run seed

The development server serves plain HTTP, the same as the container. To try the app from a phone, run a proxy or tunnel in front of it (see HTTPS); the installed app, Web Push and voice need that secure context.

Command	Purpose
bun run dev	Development server
bun run start	Production server on the host
bun run typecheck	Type-check
bun run test	Run the test suite
bun run seed	Create the super admin from the CLI
bun run seed:bots	Add a sample crew
bun run db:schema	Sync the schema and types
bun run gen:favicon	Regenerate favicons and PWA assets

The app is Bun, @moduletrace/bunext, SQLite via @moduletrace/bun-sqlite, Tailwind CSS and the @moduletrace/twui component library. See AGENTS.md for the full architecture, routes, queue, harness and data model.

CI runs type-check and tests on every push and pull request. Releases are built by GitHub Actions and pushed to both registries. See RELEASING.md for the release and launch checklist.

License

MIT. See LICENSE.