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gnachman/iterm2

★ 17,547Objective-CAudience · developerComplexity · 2/5Setup · easy

TLDR

iTerm2 is a feature-rich macOS terminal emulator that replaces the built-in Terminal app, adding shell integration, native tmux tabs, inline images, an AI chat window, and a Python scripting API.

Mindmap

mindmap
  root((iTerm2))
    Core Features
      Shell integration
      tmux native tabs
      Profile switching
    Extras
      AI chat window
      Inline images
      Python scripting
    Tech Stack
      Objective-C
      Rust Python
    Audience
      Mac developers
      DevOps engineers
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Things people build with this

USE CASE 1

Replace macOS Terminal with iTerm2 to get tmux managed as real Mac windows and sessions that survive SSH drops and app upgrades.

USE CASE 2

Set up automatic profile switching so your terminal turns red when you SSH into a production server.

USE CASE 3

Use the built-in AI chat window to explain terminal output or run suggested commands without leaving the terminal.

USE CASE 4

Write a Python script using iTerm2's scripting API to automate repetitive multi-tab terminal workflows.

Tech stack

Objective-CRustPython

Getting it running

Difficulty · easy Time to first run · 5min

macOS only, the AI chat feature requires an API key from a supported provider.

In plain English

iTerm2 is a terminal emulator for macOS, a replacement for the built-in Terminal app that you use to type commands directly to your computer. The README describes it as a terminal that brings the terminal into the modern age, and most of what it adds are quality-of-life features on top of a normal command-line. The headline features cluster around a few ideas. Shell integration tracks where you are and what you do: commands, directories, hostnames, and usernames, so iTerm2 can let you click to download files over SCP, drag files in to upload them, and jump between previous prompts using marks. tmux integration replaces tmux's text interface with real macOS windows and tabs, and sessions survive crashes, SSH drops, and app upgrades. Automatic Profile Switching changes the terminal's appearance based on where you're connected, the README mentions SSH'ing to production turning the background red. Other features include a built-in AI Chat window that can optionally read your terminal contents and explain output or run commands on your behalf, inline image display including animated GIFs, a Python scripting API, regex-based Triggers, Smart Selection for URLs and file paths, a Vim-style Copy Mode, Instant Replay to scrub backwards through history, a hotkey window that slides down over fullscreen apps, and a configurable status bar. You would use it if you spend significant time at the command line on a Mac and want sharper ergonomics around SSH, tmux, file transfer, or scripting. It is macOS only. The codebase is primarily Objective-C, with Rust and Python dependencies pulled in during setup. The full README is longer than what was provided.

Copy-paste prompts

Prompt 1
Set up iTerm2 shell integration on my Mac so I can click to download files from a remote server over SCP and jump backward between previous command prompts.
Prompt 2
Configure iTerm2 automatic profile switching to change my terminal background red whenever I SSH to any host matching prod-*.
Prompt 3
Write an iTerm2 Python script that opens a split pane, runs a test suite in it, and shows a badge when the tests finish.
Prompt 4
How do I set up iTerm2's AI chat feature with my own API key to explain my last command's output?
Prompt 5
Enable tmux integration in iTerm2 so each tmux window becomes a real Mac tab, show me the tmux command and iTerm2 setting.
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