Product

Nimbalyst is a visual workspace for Claude Code and Codex

Run coding agents in parallel, review tracked text edits in supported editors before committing, and edit the docs, diagrams, mockups, and code around the work in the same window. Nimbalyst is open source, runs locally, and works on macOS, Windows, and Linux.

Download Nimbalyst

Free for individuals. Works with your existing Claude Code or Codex subscription or API key.

Other downloads: Apple Silicon Mac Intel Mac Windows Linux

What Nimbalyst is

Nimbalyst is a desktop application that runs coding agents and gives you a working surface around them. It runs each vendor's own agent software on your machine rather than reimplementing it, so the agent behaves the way it does in a terminal, with a project file tree, editors, session history, and diff review around it.

Claude Code and OpenAI Codex are first-class providers. OpenCode and GitHub Copilot are available as alpha providers. You sign in with the Claude or ChatGPT subscription you already pay for and Nimbalyst runs the agent on that subscription, with no API metering. An API key is supported as an alternative, not a requirement.

Files stay on your disk in their normal formats: markdown files, Excalidraw files, source files. Nimbalyst reads and writes the project in place, so the same repository works with or without it. The desktop and iOS apps are MIT licensed and their source is on GitHub.

The workspace is free for individual use, with no feature limits and no trial period. Nimbalyst Teams adds shared documents, trackers, and team chat for people working together.

Almost everything in the workspace is an extension, including the diagram editor, the mockup editor, data models, spreadsheets, and the git panel. They are built on the same extension system you get, so an agent can write a new editor for a file type Nimbalyst does not handle yet and load it while you watch.

Why Nimbalyst

What Nimbalyst does

Parallel agent sessions

Parallel agent sessions

Run several Claude Code and Codex sessions at once and track them on one board. Search, filter, resume, branch, and archive sessions, and get notified when an agent completes a response or is waiting on you for input.

Git worktree isolation

Git worktree isolation

Create a worktree session in one click. The worktree uses a separate branch and checkout on disk, reducing accidental overlap with work in other checkouts.

Review changes as diffs

Review changes as diffs

Agent edits are written to disk and then surfaced as red and green inline diffs in the editor, so you can read exactly what changed and keep or revert it before you commit. Supported in the markdown, code, and mockup editors.

Visual editors

Visual editors

WYSIWYG markdown, Excalidraw and Mermaid diagrams, HTML mockups, data models, spreadsheets, calc sheets, mind maps, a Chromium browser pane, and code in Monaco. The agent edits the same files you do, in the same window.

Tasks next to the work

Tasks next to the work

Tasks, bugs, decisions, and plans live beside the sessions and files they belong to. Your agents read and update the same tracker you do.

Multiple agent providers

Multiple agent providers

Claude Code and OpenAI Codex are first-class. OpenCode and GitHub Copilot run as alpha providers, and an extension can register a provider of its own, which is how the Gemini agent arrives. All of them use the same session board, editors, and supported diff-review surfaces.

Your agent builds the editor

Your agent builds the editor

Describe a file type and the view you want for it, and your agent writes the extension, installs it, and reloads it into the workspace. Extensions register editors, tools, and agent providers through the same contract the built-in ones use.

Artifacts that link to each other

Artifacts that link to each other

Docs, trackers, diagrams, mockups, files, and sessions are nodes that link to one another, so a task can point at the spec, the mockup, and the session that implemented it. Your agents follow the same links you do.

Agents configured the way you want

Agents configured the way you want

Connect MCP servers, add custom slash commands and skills, and set project behaviour through CLAUDE.md or AGENTS.md. Configuration is versioned with the repo and shared with your team.

Git and pull requests in the workspace

Git and pull requests in the workspace

Browse pull requests, review the changed files, open a branch in an isolated worktree with its own session, inspect file history, and prepare a commit with an AI-drafted message. A full terminal is built in when you want the command line. Pull request review is behind the Developer Mode toggle in Settings.

iOS app

iOS app

Monitor running sessions, read transcripts, swipe through diffs, and reply to your agents from your phone, with push notifications when a session needs you.

Free, open source, and local

Free, open source, and local

Free for individual use with no feature limits or trial. The desktop and iOS apps are MIT licensed with the source on GitHub, and your project files stay on your machine unless you choose to share them.

Comparison

What the workspace adds around the agent

Feature CLI-only workflow Nimbalyst
Running sessions Sessions tracked through terminal tabs and CLI history Several sessions on one board with live status and response notifications
Branch isolation Set up git worktrees by hand Create a new worktree session in one click
Reviewing changes Read the diff in the terminal or a separate tool Red and green inline diffs in the editor, keep or revert per change
Editing artifacts Text files, through the agent or a separate editor Markdown, diagrams, mockups, data models, spreadsheets, and code editors built in
Session history Terminal scrollback and CLI resume Persistent searchable sessions you can resume, branch, and archive
Files an agent touched Git status and provider-specific summaries Per-session list of the files each agent read and wrote
Task tracking An external tracker or MCP-connected tool A tracker in the workspace that your agents read and update
Authentication Claude or ChatGPT subscription, or an API key The same subscriptions, configured once and reused across your sessions
Team collaboration Varies by provider and plan Shared docs, mockups, diagrams, and trackers that teammates and their own agents edit
Extensibility Plugins and MCP servers, where the provider supports them Extension system for editors, tools, and agent providers, plus MCP, skills, and slash commands
Cost Included with the provider plan Free for individual use; Teams is a paid plan
Platforms macOS, Windows, Linux macOS, Windows, Linux, plus an iOS app for monitoring and review
Source code Varies by vendor Desktop and iOS apps MIT licensed on GitHub

Collaboration

Working with a team

Nimbalyst Teams makes the same workspace multiplayer. Teammates and their own local agents edit the same shared plans, mockups, diagrams, and trackers in real time, and team chat is built into the workspace the work lives in.

Each person keeps running their own agents on their own machine. What is shared is the work: the documents, the diagrams, the mockups, and the board everyone is working from.

Collaborative editing

Shared markdown, mockups, and diagrams edited in true multiplayer. Each teammate's local agent edits the same documents. Promote any local file to a shared one in a click, and review its full change history.

Collaborative task management

Shared kanban boards and trackers. Your local agents read and update the same tracker your teammates do, so the board reflects what is actually happening.

One connected workspace

Shared docs, local files, trackers, and agent sessions live together and link to each other, so less context is lost between the plan and the work.

Team chat built in

Messaging sits in the same workspace as the plans, trackers, and documents the conversation is about, rather than in a separate app you have to link back by hand.

FAQ

Frequently asked questions

What is Nimbalyst?
Nimbalyst is an open-source desktop workspace for building with coding agents. It runs Claude Code and OpenAI Codex on your machine, manages parallel sessions on a board, creates separate worktree sessions when requested, shows tracked text edits as reviewable diffs in supported editors, and provides visual editors for markdown, diagrams, mockups, data models, spreadsheets, and code. It runs on macOS, Windows, and Linux, with an iOS app for monitoring and review.
Which coding agents does Nimbalyst run?
Claude Code and OpenAI Codex are first-class agent providers. OpenCode and GitHub Copilot are available as alpha providers. You can run different providers side by side on the same project and pick a different one per session.
Do I need an API key to use Nimbalyst?
No. Nimbalyst authenticates with the subscription you already have. Sign in with a Claude Pro, Max, or Team subscription for Claude Code, or a ChatGPT Plus, Pro, or Team subscription for Codex, and the agent runs on that subscription with no API metering. An API key is supported if you prefer to pay per use.
How does Nimbalyst handle agent changes to my files?
Agents write their edits to disk, and Nimbalyst then shows them as red and green inline diffs in the editor so you can keep or revert each one before you commit. Diff review is supported in the markdown, code, and mockup editors; some editors, such as Excalidraw and data models, do not render diffs. Each session also keeps a list of the files it read and wrote, so you can review a session's full footprint before committing.
Can I run several agents at once without them conflicting?
Yes. Sessions run in parallel, and you can create a worktree session in one click. Each worktree has a separate branch and checkout on disk, which reduces accidental overlap between parallel agents. A single worktree can also hold several sessions when you want them working together.
What platforms does Nimbalyst run on?
Nimbalyst is a desktop app for macOS, Windows, and Linux. There is also an iOS app for monitoring sessions, reviewing diffs, and chatting with your agents from your phone.
Is Nimbalyst free?
Yes, for individual use, with no feature limits and no trial period. Nimbalyst Teams, which adds shared documents, trackers, and team chat, is a paid plan. You also keep paying your own agent provider directly, since Nimbalyst runs on your existing Claude or ChatGPT subscription rather than reselling access.
What file types can I edit in Nimbalyst?
Markdown in a WYSIWYG editor, code in Monaco, Excalidraw and Mermaid diagrams, HTML mockups, data models, CSV spreadsheets, calc sheets, and mind maps. There is also a Chromium browser pane for previewing pages, plus a SQLite browser and PDF viewer. Files are saved in their ordinary formats, so they version and diff like any other file in the repository.
Can I add an editor for a file type Nimbalyst does not support?
Yes. Many editors that ship with Nimbalyst are extensions built on the same public extension system available to users. You can describe the file type and the view you want, and your agent will write the extension, install it, and reload it into the workspace. Extensions can register editors, tools, and agent providers.
Does Nimbalyst work with MCP servers, skills, and CLAUDE.md?
Yes. You can connect MCP servers so your agents reach external tools such as trackers, databases, and repositories, add custom slash commands and skills, and set project-level behaviour in CLAUDE.md or AGENTS.md. Because those files live in the repository, they version with your project and apply for everyone working in it.
Does Nimbalyst work for a team?
Yes. Nimbalyst Teams makes the workspace multiplayer: teammates and their own local agents edit the same shared documents, mockups, diagrams, and trackers in real time, with team chat built into the same workspace. Each person still runs their own agents on their own machine. What is shared is the work, not the agent sessions.
Is Nimbalyst open source?
Yes. The Nimbalyst desktop and iOS apps are MIT licensed, and the source for both is on GitHub at github.com/Nimbalyst/nimbalyst. You can read it, audit how the app talks to your agents, run it locally, fork it, or contribute fixes.
Does Nimbalyst replace my IDE or my terminal?
It does not have to. Nimbalyst reads and writes an ordinary git repository on disk in ordinary file formats, so you can keep your editor and terminal open on the same project. Nimbalyst includes a code editor and a terminal if you would rather work in one window.

Learn More

Related guides and comparisons

Features

A full tour of the editors, session management, tracking, and developer features.

Download Nimbalyst

Installers for macOS, Windows, and Linux, plus the iOS app.

Open source

Licensing, the tech stack, and how to build on Nimbalyst.

Pricing

What is free for individuals and what Teams adds.

Visual workspace for Claude Code

Running Claude Code inside Nimbalyst with sessions, diffs, and visual editors.

Visual workspace for Codex

Running OpenAI Codex inside Nimbalyst alongside Claude Code.

Nimbalyst Teams

Shared docs, mockups, diagrams, and trackers for a team and their agents.

Agent harness

How Nimbalyst runs Codex, Claude Code, and other agents inside one durable workflow layer.

Nimbalyst is the open-source visual workspace for building with Codex, Claude Code, and more

Download Nimbalyst

Free for individuals. Works with your existing Claude Code or Codex subscription or API key.

Other downloads: Apple Silicon Mac Intel Mac Windows Linux

Nimbalyst Teams is multiplayer. Your whole team, Codex, and Claude Code in one shared workspace.