Code editor
RBS includes a complete web-based code editor that runs in your browser, connected directly to your RBS Server. No desktop app to install, no extensions to configure — open a browser, connect to your branch server, and start coding with full IDE features.API for building your own integrations and a standalone code editor are coming soon. We’re working on a public API and SDK so you can build custom editor integrations, plugins, and workflows on top of the RBS platform. Stay tuned.
What’s included
Code editor
ReasonOS editor with syntax highlighting, autocomplete, split view, and multi-tab support.
Language servers
Full LSP support — autocomplete, hover, diagnostics, go-to-definition, rename, formatting, and more.
Integrated terminal
Multi-tab terminal connected to your RBS Server with port detection and auto-proxy.
Git integration
Stage, unstage, diff, blame, branch management, and inline gutter decorations — all built in.
AI assistant
AI coding agent with tool calling, streaming responses, reasoning display, and multi-agent teams.
Collaboration
Real-time co-editing, video meetings, screen sharing, team chat, and presence tracking.
Editor
The code editor is built on CodeMirror and supports editing files across your entire workspace.Syntax highlighting
Syntax highlighting is supported for a wide range of languages:| Language | Extensions |
|---|---|
| JavaScript / TypeScript | .js, .jsx, .ts, .tsx, .mjs, .cjs |
| Python | .py |
| HTML | .html, .htm |
| CSS / SCSS / LESS | .css, .scss, .less |
| JSON | .json |
| Markdown | .md, .markdown |
| SQL | .sql |
| C / C++ | .c, .cpp, .h, .hpp |
| RBS | .rbs |
| And more | .go, .rs, .java, .kt, .rb, .php, .yaml, .xml, .sh, .tf, .proto |
Editor features
| Feature | Description |
|---|---|
| Multi-tab editing | Open multiple files in tabs. Drag-and-drop to reorder. Middle-click to close. |
| Split view | Split the editor into two panes (Cmd+\) to view and edit files side by side. |
| Quick open | Fuzzy file finder (Cmd+P) — type a filename to open it instantly. |
| Find in file | Cmd+F to search within the current file with regex support. |
| Global search | Cmd+Shift+F for workspace-wide search with regex, case sensitivity, and glob filters. |
| Word wrap | Toggle word wrap in settings. |
| Code folding | Collapse and expand code blocks. |
| Bracket matching | Auto-close brackets, parentheses, and quotes. |
| Multiple selections | Rectangular selection and multiple cursor support. |
Keyboard shortcuts
| Shortcut | Action |
|---|---|
Cmd+S | Save the current file. |
Cmd+P | Quick open (fuzzy file finder). |
Cmd+F | Find in current file. |
Cmd+Shift+F | Global search across workspace. |
Cmd+Shift+G | Toggle Git panel. |
Cmd+B | Toggle file explorer sidebar. |
Cmd+\ | Toggle split editor. |
Cmd+` | Toggle integrated terminal. |
Language Server Protocol (LSP)
The editor connects to language servers running on the RBS Server for full IDE-grade intelligence. LSP servers are started automatically when you open a file in a supported language.LSP features
| Feature | Description |
|---|---|
| Autocomplete | Context-aware completions with documentation and snippets. |
| Hover information | Hover over any symbol to see its type, documentation, and signature. |
| Diagnostics | Real-time errors and warnings displayed inline and in the status bar. |
| Go to definition | Jump to the definition of any symbol. |
| Go to type definition | Jump to the type definition of a symbol. |
| Find references | Find all usages of a symbol across the workspace. |
| Document symbols | Browse the symbol outline of the current file. |
| Rename | Rename a symbol across all files in the workspace. |
| Code formatting | Format the entire document or a selection. |
| Signature help | See function parameter information as you type. |
| Code actions | Quick fixes and refactoring suggestions. |
LSP status
The editor status bar shows the current LSP connection state:- LSP (green) — connected and working.
- LSP (spinner) — connecting to the language server.
- LSP (sync needed) — run
rbs syncto install the language server. - LSP (red) — connection error.
Integrated terminal
The editor includes a multi-tab terminal connected directly to your RBS Server. All commands run on the server, not your local machine.Terminal features
| Feature | Description |
|---|---|
| Multi-tab | Open multiple terminal sessions in separate tabs. |
| Full PTY | A real pseudo-terminal — run interactive commands, vim, htop, etc. |
| Port detection | When a process starts listening on a port, the terminal detects it and can auto-open the built-in browser. |
| Resize | Drag the terminal border to resize. The PTY adjusts automatically. |
| Signals | Send Ctrl+C (SIGINT), SIGTERM, or SIGKILL to running processes. |
Git integration
The editor has built-in Git support — no terminal commands needed for common workflows.Git panel
Open the Git panel withCmd+Shift+G to see:
- Changed files — modified, added, deleted, untracked, and renamed files.
- Inline diffs — expand any file to see a hunk-by-hunk diff.
- Stage / unstage — click to stage or unstage individual files.
- Stage all / unstage all — batch operations.
- Discard changes — revert a file to its last committed state.
Git gutter
The editor gutter shows inline change indicators:- Green bar — added lines.
- Blue bar — modified lines.
- Red triangle — deleted lines.
Additional Git features
| Feature | Description |
|---|---|
| Blame | See who last changed each line and when. |
| History | View the commit history for a file or the entire repo. |
| Branches | View and switch between branches. |
| Hunk revert | Revert individual hunks within a file, not just the whole file. |
AI coding assistant
The editor includes an AI-powered coding agent that can read files, write code, run terminal commands, and reason through complex tasks.Features
| Feature | Description |
|---|---|
| Streaming chat | Chat with the AI agent. Responses stream in real-time. |
| Tool calling | The agent can read and write files, run terminal commands, and search the codebase. |
| Thinking / reasoning | See the agent’s chain-of-thought reasoning as it works through your request. |
| Context files | Attach specific files to your prompt so the agent has full context. |
| Multi-agent teams | Spawn a team of specialized agents (frontend, backend, reviewer, tester, etc.) that collaborate on a task. |
| Configurable | Set your own API key and choose your preferred model. |
Opening the AI assistant
Click the AI tool in the top navigation bar, or it can be opened via the tools menu. The AI panel opens on the right side of the editor.Built-in web browser
The editor includes a built-in web browser for testing web applications without leaving the editor.Features
| Feature | Description |
|---|---|
| Port proxy | The RBS Server proxies local ports so you can preview your app in the embedded browser. |
| Auto-open | When the terminal detects a new port (e.g., a dev server starting), the browser opens automatically. |
| Navigation | Full browser controls — back, forward, refresh, URL bar. |
Collaboration
When multiple developers connect to the same branch server, the editor provides real-time collaboration features — no third-party tools required.Real-time editing
Edit the same file simultaneously with teammates. OT-based conflict resolution, remote cursors, and selection highlighting.
Video meetings
Peer-to-peer video calls with camera and screen sharing directly inside the editor. WebRTC — no third-party servers.
Team chat
Chat rooms with code snippet sharing, file references, typing indicators, and message history.
Presence
See who’s online, what file they’re viewing, who’s in a meeting, and who’s in a chat session.
Collaborative editing details
- Operational Transformation (OT) — the same technique used by Google Docs. One op in flight at a time, with server-side transformation for consistency.
- Remote cursors and selections — each user gets a distinct color. Cursor positions are updated automatically when remote edits shift content.
- Editing region awareness — visual indicators show which lines each user is actively editing.
- Conflict warnings — the system warns when two users edit overlapping regions.
- Split-view support — each split pane is an independent collaboration participant.
Status bar
The editor status bar shows:- Collab button — toggle collaborative editing on/off. Shows the number of connected peers.
- LSP status — current language server connection state.
- File encoding — UTF-8 by default.
- Git changes count — number of uncommitted changes.
Learn more about collaboration
See the full collaboration feature set: real-time editing, video, screen sharing, chat, and presence tracking.
File explorer
The left sidebar provides a file explorer with:| Feature | Description |
|---|---|
| Lazy loading | Directories are loaded on demand for fast initial load. |
| Streaming | Large repos use SSE-based streaming so the explorer populates incrementally. |
| File operations | Create, rename, delete, copy, and move files and folders. |
| Presence dots | Colored dots next to files indicate which teammates are viewing or editing them. |
Cmd+B or from the status bar.
Tool pane
The right side of the editor hosts a tool pane for AI, browser, meetings, and chat. Tools are opened from the Tools menu in the top navigation bar and can be opened/closed independently.| Tool | Description |
|---|---|
| AI | AI coding assistant with streaming chat and tool calling. |
| Browser | Built-in web browser for previewing web apps. |
| Meeting | Video meeting with camera, mic, and screen share controls. |
| Chat | Team chat rooms with code sharing and typing indicators. |
Coming soon
We’re building a public API and SDK for custom integrations. This will allow you to:
- Build custom editor plugins and extensions.
- Connect external tools to the RBS Server programmatically.
- Automate workflows using the RBS API.
- Integrate with your own internal development tools.