A Claude Code plugin that opens Ghostty split panes running Claude Code from your current session.

Scope: macOS + Ghostty only. The split is driven through Ghostty's AppleScript dictionary via osascript, so other terminals (iTerm2, WezTerm, Kitty, Alacritty…) and other operating systems are not supported.

• /split-new [prompt] — Open a new Ghostty split pane in the current working directory and start a fresh claude session. If [prompt] is given, it is passed to claude as the initial prompt.
• /split-fork [prompt] — Open a new Ghostty split pane and fork the current session into it (claude --continue --fork-session). Both panes share history up to the fork point, then diverge. If [prompt] is given, it is sent as the next user turn in the forked session.
• /create-new [prompt] — Same as /split-new, but opens a new Ghostty tab in the front window instead of splitting the current pane.
• /create-fork [prompt] — Same as /split-fork, but opens the forked session in a new Ghostty tab instead of a split pane.

Note on quoting: the prompt is wrapped in "..." and typed into the new pane verbatim — embedding literal double quotes in your prompt will break the wrapping. For prompts with quotes, type them in the new pane after it opens.

• macOS (uses AppleScript)
• Ghostty
• Claude Code

From inside Claude Code, add the marketplace and install the plugin:

/plugin marketplace add liunuozhi/claude-panes
/plugin install claude-panes@claude-panes

Confirm with /plugin.

Each command shells out to a small script in bin/, which runs an osascript snippet that talks to Ghostty's AppleScript dictionary:

1. Build a new surface configuration with the current cwd as initial working directory.
2. Set initial input to <cmd>\n (or <cmd> "<prompt>"\n if a prompt was given), where <cmd> is claude or claude --continue --fork-session.
3. Either split the focused terminal of the front window to the right with that configuration (open-ghostty-split.sh), or open a new tab in the front window with it (open-ghostty-tab.sh). Both variants fall back to new window if no Ghostty window is open.

That's the whole mechanism — no session-file copying, no daemons. Forking is delegated to Claude Code's built-in --fork-session flag.

Local layout:

.claude-plugin/
  plugin.json
  marketplace.json
bin/
  open-ghostty-split.sh
  open-ghostty-tab.sh
commands/
  split-new.md
  split-fork.md
  create-new.md
  create-fork.md

Validate manifests:

claude plugin validate /path/to/claude-panes

Hot-reload story:

Errors don't surface in the TUI — start with claude --debug and tail ~/.claude/logs/debug.log.

The Ghostty-split mechanism is adapted from extensions/split-fork.ts in mitsuhiko/agent-stuff, which originally implemented this for the pi-coding-agent. This plugin reuses the AppleScript pattern and adapts it to Claude Code's --fork-session flag.

MIT