Nimbalyst

Nimbalyst: Open-source visual workspace for building with Codex, Claude Code, OpenCode, and other coding agents. Work on everything in one place: sessions, worktrees, tasks, docs, diagrams, mockups, commits, and code. Visually editable. Deeply linked. Free and MIT licensed. Desktop app for macOS, Windows, and Linux, with an iOS companion app.

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https://github.com/user-attachments/assets/bfd89552-61f4-4db1-8301-cc2495423b89

What you get

• Visual editing of the agent's work. WYSIWYG editors for markdown, mockups, Mermaid, Excalidraw, CSV, data models, and code in Monaco. You and the coding agent edit the same files.
• Red/green diff review. Step through the agent's proposed edits in the rendered document and accept or reject each one.
• Parallel agent sessions. Run several coding agents at once, each isolated in its own git worktree.
• Session kanban. Track every session on a board. Search, resume, and link sessions to the files they touched.
• Task tracking. Plans, bugs, features, and todos in trackers your agents read and update alongside you.
• Heterogeneous agents. Codex and Claude Code side by side, plus OpenCode and GitHub Copilot in alpha and a Gemini provider.
• Git built in. Branch and worktree management, staging, AI-drafted commits, and an embedded terminal.
• MCP client and servers. Connect any MCP server, with tool results rendered as visual widgets rather than raw JSON.
• Extension SDK. Every editor, including the built-in ones, goes through the same EditorHost contract, so an editor you build is first-class. Ask your agent to build one for a file type we do not ship.
• Plain files on disk. Content and status in markdown, workflows in slash commands, everything in your git repo. No proprietary store to migrate out of.
• iOS companion. See which agents need you, reply by text or voice, swipe through diffs, queue the next task, and get a push when an agent is waiting.

Features

Visual Editors: Built-in WYSIWYG editors where you and your coding agents collaborate visually. Approve agent changes as red/green diffs, edit, annotate, and iterate.

• Markdown
• Mockups with annotations
• Mermaid
• Excalidraw
• CSV
• Data Models
• Code with Monaco

Session Management: Manage coding agents' work across parallel sessions in a UI

• Link sessions to files and files to sessions
• Open files in your sessions. Group files touched by a session
• Run parallel sessions
• Search and resume sessions
• Manage in a Kanban board

Task Tracking: Keep track of your plans, bugs, features, todos etc.

• Have the agent edit tasks, add them, move them, and execute them
• Humans view and edit them too

For Developers

• Manage git state
• Use AI to git commit
• Use the embedded ghostty terminal
• Leverage worktrees

Mobile App

• Session dashboard: see which agents need you and which are still working
• Reply to questions via text or voice, agents resume immediately
• Visual diff review: swipe through changes, tap to approve
• Queue next tasks: keep the pipeline full, don't let agents sit idle
• Push notifications: agents tell you when they need you