"Fusuma," an IDE Specialized in AI Development, Debuts
Koi Fish Labs Inc. today released "Fusuma," a desktop IDE specialized in AI development, integrating AI chat, terminal, and file explorer into a single native window to provide a new development experience with zero context switching between tools. It offers features like autonomous AI agent operations, an LLM-operable built-in browser, and a lightweight design built with Rust/Tauri, now available for free on macOS.
📋 Article Processing Timeline
- 📰 Published: May 9, 2026 at 03:02
- 🔍 Collected: May 8, 2026 at 18:31
- 🤖 AI Analyzed: May 8, 2026 at 19:22 (50 min after Collected)
Koi Fish Labs Inc. today released "Fusuma," a desktop IDE specialized in AI development. It integrates AI chat, terminal, and file explorer into a single native window, offering a new development experience that eliminates context switching between tools.
### Three Widgets
**AI Chat**
Supports Claude and Codex. Rich inline display for Markdown, code blocks, diffs, and file references. AI agents autonomously perform file reading/writing and command execution, eliminating the need for copy-pasting.
**Terminal**
Full PTY emulation. Supports ANSI colors, link detection, and TUI. Run htop, vim, and development servers as they are.
**File Explorer**
File editor with full-text search. Supports switching between tree and card views. View staged Git changes and side-by-side diffs on the spot.
### Arrange Freely, Add as Many as You Like
Each widget can be freely arranged by dragging and resized by dragging its edges. Open multiple instances of the same widget simultaneously; for example, monitor front-end and back-end servers side-by-side with two terminals, or handle multiple tasks in parallel by opening several AI chats.
### Key Features
**Instant Workspace Switching**
Instantly switch between multiple workspaces with keyboard shortcuts. Resume work while maintaining the layout for each project.
**Built-in Browser Operable by LLM**
AI can open web pages to retrieve and confirm information without user intervention. This allows for seamless progression from research to implementation.
**Unmissable Notification Design**
Clearly notifies when AI is waiting for input or a task is completed. This allows you to delegate tasks to AI in parallel while working on something else.
**Lightweight Design with Rust Native Binary**
Built with the Rust framework "Tauri." The app size is approximately 25MB, overwhelmingly lighter compared to Electron-based apps (many around 200MB). Minimizes battery and memory load.
macOS compatible. Free availability starts today. Download for free here:
https://fusuma.dev/
News about the app will be posted on this X account:
https://x.com/koifishlabs
### Three Widgets
**AI Chat**
Supports Claude and Codex. Rich inline display for Markdown, code blocks, diffs, and file references. AI agents autonomously perform file reading/writing and command execution, eliminating the need for copy-pasting.
**Terminal**
Full PTY emulation. Supports ANSI colors, link detection, and TUI. Run htop, vim, and development servers as they are.
**File Explorer**
File editor with full-text search. Supports switching between tree and card views. View staged Git changes and side-by-side diffs on the spot.
### Arrange Freely, Add as Many as You Like
Each widget can be freely arranged by dragging and resized by dragging its edges. Open multiple instances of the same widget simultaneously; for example, monitor front-end and back-end servers side-by-side with two terminals, or handle multiple tasks in parallel by opening several AI chats.
### Key Features
**Instant Workspace Switching**
Instantly switch between multiple workspaces with keyboard shortcuts. Resume work while maintaining the layout for each project.
**Built-in Browser Operable by LLM**
AI can open web pages to retrieve and confirm information without user intervention. This allows for seamless progression from research to implementation.
**Unmissable Notification Design**
Clearly notifies when AI is waiting for input or a task is completed. This allows you to delegate tasks to AI in parallel while working on something else.
**Lightweight Design with Rust Native Binary**
Built with the Rust framework "Tauri." The app size is approximately 25MB, overwhelmingly lighter compared to Electron-based apps (many around 200MB). Minimizes battery and memory load.
macOS compatible. Free availability starts today. Download for free here:
https://fusuma.dev/
News about the app will be posted on this X account:
https://x.com/koifishlabs