The preview panel worked by proxying a dev server through OpenChamber's own
origin and rewriting the HTML that came back. Anything the rewriter did not
anticipate broke, and pages that refuse to be embedded never loaded at all.
This deletes the proxy (-1604 lines and its tests) and merges the preview and
browser panels into one surface backed by a real Chromium view.
What the panel is now
- A `<webview>` in its own session partition: logins and cookies persist, hot
reload works because nothing is rewritten, DevTools are one click away.
- Annotation: pick one element, drag a region, or draw freehand, write a note,
and it reaches chat with a screenshot of the visible page with the marks on it.
- Toolbar: hard reload, page zoom, device sizes, a light/dark switch that
applies to the page rather than the app, and cookie/cache clearing scoped to
the panel alone.
- Several pages at once, each tab showing the page's own favicon, and an address
bar that suggests pages already visited in this project.
- Dev servers are listed from what is actually listening on the machine, checked
against what a project announced, so a server is offered no matter how it was
started. One that is still starting is waited for instead of failing.
Remote dev servers
The desktop app binds a local port and pipes raw bytes to the OpenChamber host
over the existing authenticated connection, so the page keeps its own origin at
the root of its own host. The reachable set is exactly what discovery reports
and is re-checked per connection, so an authenticated client cannot dial
arbitrary local services on the host. Links and redirects to another loopback
port stay on the machine that served the page. A tunnel that cannot be opened is
reported; it is never replaced by the plain loopback URL, which would answer
from the user's own machine under a remote address.
Agent control
Browser actions are a separate `openchamber_web` tool: open, snapshot, click,
type, scroll, inspect computed styles, resize between mobile/tablet/desktop, and
capture a screenshot into `.openchamber/screenshots/` in the project. The
existing `openchamber` tool keeps sessions, worktrees and scheduled tasks. Each
has its own setting in the new Settings -> General -> OpenChamber Tools section,
and the plugin is not injected at all when both are off.
Capability belongs to the connected client, not to configuration: a client
declares on its event stream that it can drive a page, which only a Chromium
host does. Exactly one client performs each request — it claims the request
before acting, and the first claim wins — because deciding by whose result
arrives first would be too late for a click that already happened. No client
listening is answered immediately with an explanation rather than a timeout.
Runtime boundaries
Web tabs get a plain iframe that can display a page but not inspect one. The
VS Code extension no longer offers the surface at all, since nothing that makes
the panel worth having works there. Mobile is unaffected.
Native boundary
Camera, microphone, location and device-picker requests from panel pages are
denied — Electron grants them by default when no handler is set, and the panel
loads whatever address the user types. Page capture, appearance emulation and
storage clearing verify that their target belongs to the panel's own session
instead of trusting a web-contents id from the renderer.
Persisted state
Stored `preview` tabs migrate to `browser` (v13 -> v14). Context panel tab
limits are now per surface, so filling one surface no longer evicts another's
tabs. Address history is stored per project and per runtime.
Documentation
`preview.mdx` and `desktop-browser.mdx` rewritten across all locales, the agent
tool settings path corrected, new `DOCUMENTATION.md` for the browser-control
broker and the dev tunnel, and the `ui-api-decoupling` skill updated where it
still described the deleted proxy.
OpenChamber is an open-source workspace for running, supervising, and reviewing AI coding work across desktop, browser, editor, and mobile.
OpenChamber gives you one place to direct agent work, understand the changes, and move them toward release. Your projects stay available when you switch devices or step away.
More screenshots
What you can do with OpenChamber
Goals that continue on their own
Give a session a finish line with Session Goals. OpenChamber checks the result after every turn and keeps the agent working until the goal is complete, blocked, or reaches the limit you set — even after you close the app.
Compare and combine runs
Use Multi-run to give the same task to up to five models, each in its own session and optionally its own worktree. See what each one actually built, choose the best result, or use Fusion to combine the strongest parts into a new session.
Guided changes walkthroughs
Changes Walkthrough turns a large diff into an AI-guided tour of the change. It groups related edits into steps, puts them in the order the change makes sense, and explains how the pieces fit together.
Inspect a running app
Open your app beside the conversation with Preview. Point at an element and send the agent its screenshot, styles, position, and browser errors — all the context behind “this thing here.” Desktop brings the same workflow to any web page through its built-in browser.
GitHub context from issue to pull request
Start a session from a GitHub issue or pull request with its context attached. Send failed checks or review comments back to the agent, then update or merge the pull request from OpenChamber.
Continue on another device
Open the same projects and sessions from Desktop, Web/PWA, VS Code, iOS, or Android. Check progress, answer questions, review changes, and reattach to a running terminal.
Private remote access
Pair a device with a one-time QR code and connect through Private Relay without opening ports or exposing a public server. The connection is end-to-end encrypted and can be revoked at any time. Direct connections, LAN/VPN access, Cloudflare/Ngrok tunnels, and SSH are also supported.
Track work across projects
See which sessions are working, waiting, finished, or failed, along with approvals, scheduled tasks, provider limits, token use, and costs. Organize sessions into folders and keep notes, todos, and reusable project actions nearby.
Schedule recurring work
Run a prompt once, daily, weekly, or on a cron schedule. Scheduled tasks can use Session Goals, so they continue toward an outcome instead of stopping after one response.
Use it where you work
Surface
Role
Desktop
The complete workspace for macOS, Windows, and Linux, with multiple windows, Mini Chat, remote machines, SSH, and native notifications
Web / PWA
Open your workspace in a browser, install it as an app, and stay up to date through background notifications
VS Code
Keep sessions beside your code, send selections to the agent, open results in the editor, and compare parallel runs
iOS / Android
Review and steer work away from your desk, receive completion alerts, and use the terminal with touch controls
CLI / Server
Run OpenChamber on a workstation or server, schedule work, manage remote access, and keep it available after login
Quick start
Desktop — macOS, Windows, and Linux
Download the latest release from GitHub Releases. Desktop bundles the matching OpenCode CLI, so no separate OpenCode installation is required.
Linux releases are available as x86_64 and ARM64 AppImages. Make the downloaded AppImage executable and keep it in a writable location for in-app updates:
OpenChamber uses OpenCode to power its coding agents. We chose it because we believe it provides the best open-source agentic coding experience today: capable, extensible, and open by design.
Around that foundation, OpenChamber brings together the work that happens before, during, and after an agent run — deciding what to try, keeping it on track, reviewing the result, connecting from anywhere, and getting the change shipped.
OpenChamber is an independent project and is not affiliated with the OpenCode team.
Contributing
See CONTRIBUTING.md for development setup and contribution guidelines. Documentation authoring guidance lives in packages/docs.
Acknowledgments
Special thanks to:
OpenCode for its excellent API and extensible open-source architecture
Pierre for its fast diff viewer and syntax highlighting
Bohdan Triapitsyn
a5aa32446d
