Agentastic.dev is Ghostty and Git worktrees = multi-agent CC/Codex IDE
I’ve been tinkering with what a “multi-agent IDE” should look like if your day-to-day workflow is mostly in terminal (Claude Code, OpenAI Codex, etc.). The more I played with it, the more it collapsed into three fundamentals: * A good TUI: Terminal is the center stage, with other stuff (CodeEdit, Diff, Review) baked on the side. I don’t like piping Agent’s output through some electron wrapper, here you get to run CC/Codex/Droid/Amp/etc directly. * Isolation: agents shouldn’t step on each other’s toes. The simplest primitive I’ve found is Git worktrees. It is not as…
In plain words
Agentastic.dev is a terminal-based IDE designed for developers working with AI coding agents like Claude Code and OpenAI Codex. It places the terminal at the center with integrated code editing, diff viewing, and review tools alongside. The tool uses Git worktrees to isolate multiple agents, giving each its own working directory and repository snapshot to prevent conflicts. Developers can run agents directly without electron wrappers and manage worktrees through a simplified GUI and keyboard shortcuts instead of CLI commands.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
I’ve been tinkering with what a “multi-agent IDE” should look like if your day-to-day workflow is mostly in terminal (Claude Code, OpenAI Codex, etc.). The more I played with it, the more it collapsed into three fundamentals: * A good TUI: Terminal is the center stage, with other stuff (CodeEdit, Diff, Review) baked on the side. I don’t like piping Agent’s output through some electron wrapper, here you get to run CC/Codex/Droid/Amp/etc directly. * Isolation: agents shouldn’t step on each other’s toes. The simplest primitive I’ve found is Git worktrees. It is not as isolated nor heavy as containers/vms, but it is the next best thing for working locally. Each agent gets its own working directory and their own snapshot of the repo. Git worktree requires CLI kung-fu, but agentastic simplifies it through some nice GUI and keyboard shortcuts for easy creation/switching/etc. * An excellent terminal: I couldn’t get comfortable with xterm.js (Code/Cursor/Conductor/etc), and i loved Ghostty, it is fast, pretty, and feels right. So naturally the whole experience is built around Ghostty (There is also SwiftTerm as an alternative option). Agentastic.dev is a native mac IDE, built around the workflow of “one task = one worktree = one terminal session” as the default. You spin up multiple worktrees (branches) and run different agents in parallel, each with its own clean working directory and terminal session and codeedit, then review and merge when you’re ready. We’ve been dogfooding it to build http://agentastic.dev itself and agentastic.com (coming soon), and it’s noticeably improved our productivity. https://pasteboard.co/xg1YOsk5MIn9.png It’s early and still rough in places. I’d love feedback from people who use worktrees heavily or run multiple coding agents: - What would you want from a multi-agent IDE that you can’t get from a terminal + tmux? - What’s missing / annoying in your current worktree workflow?
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Hey HN! I wanted to share something I built over the last few weeks: isometric.nyc is a massive isometric pixel art map of NYC, built with nano banana and coding agents. I didn't write a single line of code. Of course no-code doesn't mean no-engineering. This project took a lot more manual labor than I'd hoped! I wrote a deep dive on the workflow and some thoughts about the future of AI coding and creativity: http://cannoneyed.com/projects/isometric-nyc
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