@openchamber/web

Run OpenCode in your browser. Install the CLI, open localhost:3000, done. Works on desktop browsers, tablets, and phones as a PWA.

Full project overview, screenshots, and all features: github.com/btriapitsyn/openchamber

Install

curl -fsSL https://raw.githubusercontent.com/btriapitsyn/openchamber/main/scripts/install.sh | bash

Or install manually: bun add -g @openchamber/web (or npm, pnpm, yarn).

Prerequisites: OpenCode CLI installed, Node.js 22+.

Usage

openchamber                          # Start on port 3000
openchamber --port 8080              # Custom port
openchamber --lan --port 3000        # Listen on LAN (0.0.0.0)
openchamber --ui-password secret     # Password-protect UI
openchamber startup enable           # Start at login as a native service
OPENCHAMBER_UI_PASSWORD=secret openchamber startup enable # Save service password env
openchamber startup status           # Show startup service status
openchamber startup disable          # Remove startup service
openchamber tunnel help              # Tunnel lifecycle commands
openchamber tunnel providers         # Show provider capabilities
openchamber tunnel profile add --provider cloudflare --mode managed-remote --name prod-main --hostname app.example.com --token <token>
openchamber tunnel start --profile prod-main
openchamber tunnel start --provider cloudflare --mode quick --qr
openchamber tunnel start --provider cloudflare --mode managed-local --config ~/.cloudflared/config.yml
openchamber tunnel status --all      # Show tunnel state across instances
openchamber tunnel stop --port 3000  # Stop tunnel only (server stays running)
openchamber connect-url --port 3000  # Add this server to OpenChamber Desktop
openchamber connect-url --server http://host:3000 --qr
openchamber connect-url --port 3000 --qr
openchamber logs                     # Follow latest instance logs
OPENCODE_PORT=4096 OPENCODE_SKIP_START=true openchamber                    # Connect to external OpenCode server
OPENCODE_HOST=https://myhost:4096 OPENCODE_SKIP_START=true openchamber  # Connect via custom host/HTTPS
openchamber stop                     # Stop server
openchamber update                   # Update to latest version

startup enable snapshots your current environment into the native service so startup behaves like you launched openchamber from the same shell. This preserves provider tokens, PATH, SSH agent settings, and other CLI auth/config env vars. Use --no-env-snapshot for a minimal service env.

Tunnel behavior notes

• One active tunnel per running OpenChamber instance (port).
• Starting a different tunnel mode/provider on the same instance replaces the active tunnel.
• Replacing or stopping a tunnel revokes existing connect links and invalidates remote tunnel sessions.
• Connect links are one-time tokens; generating a new link revokes the previous unused link.

Connect other OpenChamber apps

Use connect-url when a web/API server should be added to OpenChamber Desktop or another OpenChamber app. If no server is running on the selected port, OpenChamber starts one first.

openchamber connect-url --port 3000
openchamber connect-url --port 3000 --qr
openchamber connect-url --port 3000 --json
openchamber connect-url --port 3000 --name "Workstation"
openchamber connect-url --port 3000 --lan --server http://workstation.local:3000 --qr

Headless/API-only server for Desktop

Use this on a remote machine when you want OpenChamber running as a web/API server, then connect to it from OpenChamber Desktop on another machine:

openchamber connect-url --port 3000 --api-only --lan --server http://workstation.local:3000 --qr --ui-password your-password

--api-only starts API routes without serving browser UI assets. --lan binds the server so other machines can reach it. --server is the address saved into the Desktop connection link. --ui-password protects browser access if UI routes are enabled elsewhere; the generated client token is what Desktop uses for API access.

This creates a remote client token and prints an openchamber://connect?... link. The link contains the server URL, token, label, and payload version. In OpenChamber Desktop, paste it in Settings -> Remote Instances -> Direct Instances -> Import Link to add that server as an Instance.

If the server was started with --lan or --host 0.0.0.0, connect-url automatically advertises a detected LAN IP instead of 127.0.0.1. Use --server <url> when you want to advertise a specific DNS name, Tailscale address, reverse proxy URL, or HTTPS endpoint.

If you are exposing the server beyond localhost, start it with a password:

openchamber serve --lan --port 3000 --ui-password your-password

Generating a client token does not automatically password-protect the hosted browser UI. --ui-password protects browser access; the client token lets another OpenChamber app connect to this server.

OPENCODE_PORT=4096 OPENCODE_SKIP_START=true openchamber
OPENCODE_HOST=https://myhost:4096 OPENCODE_SKIP_START=true openchamber

| Variable | Description | |----------|-------------| | OPENCODE_HOST | Full base URL of external server (overrides OPENCODE_PORT) | | OPENCODE_PORT | Port of external server | | OPENCODE_SKIP_START | Skip starting embedded OpenCode server | | OPENCHAMBER_OPENCODE_HOSTNAME | Bind hostname for managed OpenCode server (default: 127.0.0.1, use 0.0.0.0 for LAN/remote access — trusted networks only) | | OPENCHAMBER_HOST | Bind hostname for the OpenChamber web server (default: 127.0.0.1; use 0.0.0.0 for LAN/remote access — trusted networks only) | | OPENCHAMBER_VERBOSE_REQUEST_LOGS | Set to true to log every HTTP request; disabled by default to keep user logs small | | OPENCHAMBER_SKIP_API_COMPRESSION | Set to true to disable gzip compression for /api/* responses | | OPENCHAMBER_COMPRESS_API | Set to true to force /api/* compression, or false to disable it. Desktop runtime disables API compression by default to reduce local sidecar CPU use |

OPENCHAMBER_OPENCODE_HOSTNAME=0.0.0.0 openchamber --port 3000

Security note: binding to 0.0.0.0 exposes the server on all network interfaces — use only on trusted networks and protect with firewall rules or --ui-password.

Optional env vars:

environment:
  UI_PASSWORD: your_secure_password
  OPENCHAMBER_TUNNEL_MODE: quick # quick | managed-remote | managed-local
  OPENCHAMBER_TUNNEL_PROVIDER: cloudflare

For managed-remote mode, also set:

environment:
  OPENCHAMBER_TUNNEL_MODE: managed-remote
  OPENCHAMBER_TUNNEL_HOSTNAME: app.example.com
  OPENCHAMBER_TUNNEL_TOKEN: <token>

For managed-local mode, you can set:

environment:
  OPENCHAMBER_TUNNEL_MODE: managed-local
  OPENCHAMBER_TUNNEL_CONFIG: /home/openchamber/.cloudflared/config.yml

Managed-local path note: OPENCHAMBER_TUNNEL_CONFIG must use a container path under /home/openchamber/.... If the config file references credentials-file, ensure that JSON path is also mounted and reachable inside the container.

Data directory: mount data/ for persistent storage. Ensure permissions:

mkdir -p data/openchamber data/opencode/share data/opencode/config data/ssh
chown -R 1000:1000 data/

openchamber             # Runs in background by default
openchamber stop        # Stop background server

Use --foreground to keep the CLI process alive so systemd (or any other process manager) can track and restart it. Combine with OPENCODE_HOST to connect to an OpenCode instance running as a separate service.

~/.config/systemd/user/opencode.service

[Unit]
Description=OpenCode Server

[Service]
Type=simple
ExecStart=opencode serve --port 4095
Environment="PATH=/home/linuxbrew/.linuxbrew/bin:/home/linuxbrew/.linuxbrew/sbin:/home/YOU/.local/bin:/home/YOU/.npm-global/bin:/usr/local/bin:/usr/bin:/bin"
Environment=SSH_AUTH_SOCK=%t/ssh-agent.socket
Restart=on-failure
RestartSec=5

[Install]
WantedBy=default.target

Why set PATH and SSH_AUTH_SOCK? systemd user services start with a minimal environment — no shell profile is sourced. Without an explicit PATH, OpenCode won't find tools installed via Homebrew, npm, or ~/.local/bin. Without SSH_AUTH_SOCK, git operations over SSH (push, pull, clone) will fail. %t expands to $XDG_RUNTIME_DIR (e.g. /run/user/1000), where most SSH agents write their socket.

~/.config/systemd/user/openchamber.service

[Unit]
Description=OpenChamber Web Server
After=opencode.service

[Service]
Type=simple
ExecStart=openchamber serve --port 3000 --host 0.0.0.0 --ui-password your-password --foreground
Environment="OPENCODE_HOST=http://localhost:4095"
Environment="OPENCODE_SKIP_START=true"
Restart=on-failure
RestartSec=5

[Install]
WantedBy=default.target

systemctl --user daemon-reload
systemctl --user enable --now opencode openchamber

--host 0.0.0.0 is required to listen on all interfaces (the default is 127.0.0.1). Use --host <ip> or OPENCHAMBER_HOST=<ip> to bind to a specific interface instead.

What makes the web version special

• Remote access - Cloudflare tunnel with QR onboarding. Scan from your phone, start coding.

• Mobile-first PWA - optimized chat controls, keyboard-safe layouts, drag-to-reorder projects

• Background notifications - know when your agent finishes, even from another tab

• Self-update - update and restart from the UI, server settings stay intact

• Cross-tab tracking - session activity stays in sync across browser tabs

• Cloudflare tunnel access with quick, managed-remote, and managed-local modes

• One-scan onboarding with tunnel QR + password URL helpers

• Mobile-first experience: optimized chat controls, keyboard-safe layouts, and attachment-friendly UI

• Background notifications plus reliable cross-tab session activity tracking

• Built-in self-update + restart flow that keeps your server settings intact

License

MIT