NestMux runs five AI coding agents simultaneously in isolated terminal panes

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A developer has built NestMux, a desktop app that runs multiple AI coding agents — including Claude Code, Codex, and Gemini CLI — side by side in a single window using a grid of real terminals. Each pane is an isolated environment with its own redirected HOME directory and a separate git worktree, preventing agents from overwriting each other's work on shared repositories. The app uses node-pty to spawn shells and requires no agent-specific parsing or API wrapping, making it straightforward to add support for new CLI tools. A broadcast mode forwards raw keystrokes to all panes simultaneously, though this simplicity means the app cannot detect whether an agent is ready before receiving input. The developer openly acknowledges several limitations, including process tracking difficulties and state that does not persist across restarts.

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ProgrammingDEV Community ·

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