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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.16 22 Jan 2026

Native iTerm2 Split Pane Support for Teammates

What

Teammates appear as split panes in iTerm2 on macOS, providing visual separation for each agent.

Usage

# Setup is prompted automatically when spawning teammates in iTerm2
# Requires it2 CLI tool installation via pip/pipx/uv
pip install it2

Details

Automatic detection of iTerm2 environment
Guided setup flow to install it2 CLI tool
Split panes created for each teammate with color-coded borders
Falls back to tmux if iTerm2 setup is not completed
Option to prefer tmux over iTerm2 with --teammate-mode tmux

Evidence

ITermBackend class with methods createTeammatePaneInSwarmView, isAvailable, contains "[ITermBackend] Creating pane", "iTerm2 Split Pane Setup", "✓ iTerm2 split pane support is ready"

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.16 →