Juggler: Open Source GUI Coding Agent

julesrms · hn · 2026-07-13

Juggler is a new open-source GUI coding agent released by the creator of JUCE.

The author states they were fed up with the CLI experience and wanted to build a better way to interact. Key design features of this tool include:

Sessions aren't log files, but a branchable, backtrackable, and editable Yjs CRDT document tree
The UI uses Finder-like Miller columns for quick browsing and tracing back
Local web server + P2P allows multiple devices (desktop, browser, mobile) to join the same session
Almost all components are JavaScript plugins: context items, LLM loop strategies, slash commands, and UIs can all be inspected, forked, and replaced
Backend is written in Go, window layer uses Wails (no Electron)
Supports multiple models/providers, including Claude, OpenAI/Codex, Gemini, Ollama, OpenRouter, DeepSeek, etc.

Overall, it acts more like an "IDE shell" centered around coding agent interaction and customizability.

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