# Nimbalyst: Open-Source Visual Editor for Claude Code and Codex

> Nimbalyst is an open-source visual workspace around CLI coding agents like Claude Code and Codex, with markdown editing, a session kanban, and tasks.

Published: 2026-05-20
URL: https://daniliants.com/insights/nimbalyst-visual-editor-for-claude-code-codex-open-source/
Tags: claude-code, codex, ai-agents, gui, open-source, kanban, markdown-editor

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## Summary

Nimbalyst is an open-source visual workspace (GUI) wrapped around CLI coding agents like Claude Code and OpenAI Codex. It replaces the terminal with side-by-side markdown/diagram/code editing, a session kanban board, integrated task management, and a companion iPhone app for monitoring sessions remotely.

## Key Insight

- Positions itself as the missing GUI layer for terminal-only agents (Claude Code, Codex) - review/approve/reject AI edits visually instead of in the terminal.
- **Dual license model**: local app is MIT, the team collaboration layer is AGPL. Worth noting for any forking or commercial-extension plans.
- **Session kanban** organizes agent runs by phase (backlog -> planning -> implementing -> complete), with optional one-click git worktree isolation per session.
- Claims support for **6+ parallel Claude Code sessions** - relevant for parallel/subagent workflows.
- Tasks live inside the workspace so agents read the backlog directly - no copy-pasting tickets into prompts, board updates as agents complete work.
- iPhone app pairs with desktop to start/monitor/review sessions remotely.
- Testimonials skew toward product/PRD/demo-planning use (not just coding) - signals it's pitched at PMs and builders, not only engineers.