omp-ghostty-fork-tab0.1.0

omp-ghostty-fork-tab

An omp extension for macOS Ghostty: typing a bare /fork opens a new Ghostty tab running omp --fork <current session>, switches to it, and leaves the parent session running in the original tab.

omp's built-in /fork pane|window|tab only supports tmux, Zellij, Herdr, CMUX, and Orca. This extension adds the equivalent for Ghostty through its AppleScript new tab API.

Behavior

• /fork is intercepted only when running directly in Ghostty on macOS (not inside tmux, Zellij, screen, CMUX, Herdr, wmux, or Orca). Everywhere else the built-in /fork runs unchanged.
• The child starts from the persisted transcript with omp --fork, so it is a real fork: the new session records parentSession and inherits the provider prompt-cache key.
• The new tab is selected explicitly, so you land in the forked conversation.
• Streaming sessions ask for confirmation first; in-memory sessions and vibe mode are rejected.
• --profile, PI_CONFIG_*/XDG scope variables are forwarded to the child.

Install

From git:

omp plugin install github:Rinai-R/omp-ghostty-fork-tab

Or clone and link a local checkout:

git clone https://github.com/Rinai-R/omp-ghostty-fork-tab
omp plugin link ./omp-ghostty-fork-tab

Restart omp (or run /restart) after installing. The first launch triggers the macOS Automation permission prompt for controlling Ghostty.

Notes

• TypeScript extension module loaded directly by omp's Bun runtime; no build step.
• The Ghostty launch is done by generating AppleScript and running it through osascript.
• The extension does not take over /fork tab, /fork window, or /fork pane; those keep omp's built-in behavior.

Release

Pushing a v* tag runs .github/workflows/release.yml: it checks the tag against package.json, smoke-tests the extension with Bun, publishes to npm with provenance, and creates the GitHub release.

git tag v0.1.0
git push origin v0.1.0

The workflow needs NPM_TOKEN as an Actions secret (or variable). Bump package.json before tagging; a mismatched tag fails the run.