opencode-worktree-session

A plugin for OpenCode that automatically manages Git worktrees for every AI session created from the opencode-plugin-template.

This plugin ensures your main working directory remains clean while the AI works in an isolated branch. On session end, it automatically generates a commit message, pushes the branch, and removes the worktree.

Features

• Isolation: Automatically creates a new Git worktree in .opencode/worktrees/.
• Safety: Refuses to run on the main branch to prevent accidental corruption.
• Context-Aware: Pivots the AI's working directory (cwd) to the worktree automatically.
• Automated Cleanup: Commits changes using AI-generated messages and deletes the worktree upon exit.

Installation

NPM

Add to your opencode.json:

{
  "plugin": ["@tmegit/opencode-worktree-session"]
}

Workflow

1. Start Session: Run opencode.
2. Branch Prompt: You will be prompted for a branch suffix (e.g., feature-xyz).
3. Worktree Creation: The plugin creates opencode/feature-xyz and moves the session into that path.
4. Execution: The AI performs tasks inside the isolated worktree.
5. Exit: Upon closing the session, the plugin:

• Stages all changes.
• Generates a commit message via OpenCode API.
• Pushes to origin.
• Removes the worktree safely.

Requirements

• Node.js runtime
• Git installed and configured in PATH
• OpenCode CLI

Config

Example (save as .opencode/opencode-worktree-session-config.json):

{
  "terminal": {
    "mode": "custom",
    "bin": "alacritty",
    "args": "",
    "workingDirectoryArgument": "--working-directory",
    "commandFlag": "-e"
  },
  "postWorktree": {
    "cmd": "webstorm",
    "args": ""
  },
  "configToolsAvailable": false
}

Configure the plugin in .opencode/opencode-worktree-session-config.json.

• terminal — Controls how the plugin launches a terminal.

  • mode — launch mode: default | custom | specific
  • bin — terminal binary
  • args — extra args
  • workingDirectoryArgument — workdir flag
  • commandFlag — command flag
  • terminal (specific mode) — Alacritty, iTerm, iTerm2, Terminal

• postWorktree — Command run after worktree creation.

  • cmd — command to run
  • args — command args

• configToolsAvailable — Enable or disable config helper tools (affects setpostworktree, setworktreesync, setterminal).

  • boolean — true/false

Note: change configToolsAvailable and restart your OpenCode session for it to take effect.

Development

• bun run typecheck - TypeScript type checking
• bun run lint - Fix linting issues
• bun run format - Format code with Prettier
• bun run test - Run tests
• bun run build - Build the plugin

License

Apache License 2.0