Nimbalyst

Nimbalyst is a free, open source desktop workspace for Claude Code and Codex. It combines parallel agent sessions, visual editors for docs, diagrams, mockups and code, task tracking and multiplayer collaboration, with every AI change reviewable.

Nimbalyst is a desktop workspace built around coding agents, specifically Claude Code and Codex. Instead of working in a terminal and a pile of separate apps, users run agent sessions next to the files those agents touch, and edit those files in purpose-built visual editors. The editor lineup covers Markdown, CSV spreadsheets, UI mockups, source code, Excalidraw drawings, data model diagrams, Mermaid diagrams, an in-app Chromium browser, a text-first Calc Sheet, mind maps and a Project Canvas board. Every AI edit is surfaced as a reviewable change, so the user can approve, reject or adjust it before it lands. The product is aimed at developers and product-minded teams who already pay for a Claude Code or Codex subscription, or bring an API key, and want a more visual way to direct those agents. Sessions can run in parallel, optionally isolated in git worktrees, and can be arranged on a kanban board by phase (backlog, planning, implementing, complete). A file edits sidebar lists what each session changed, with git state management and AI-assisted commits. Tasks, plans, bugs and ideas live in the same workspace, so agents can read the backlog and update it as work finishes. A multiplayer layer, currently free during its beta, lets teammates and their local agents edit shared plans, mockups, diagrams and trackers in real time, with team chat in the same workspace. Local files can be promoted to shared ones, and change history is kept. Teams are created inside the app. Nimbalyst is extensible: many of its own editors are built as extensions on the same system offered to users, there is a marketplace, and an agent can be asked to write a new editor for a file type. The desktop and iOS apps are MIT licensed and the tool is free for individuals. Among alternatives, it sits between plain terminal-based agent use and full AI IDEs: less of a code-first editor, more of a workspace for planning, designing and reviewing alongside the code.