feat: add worktree init hook configuration

[bborn]

Summary

• Add support for running a custom script after worktree creation
• Enables project-specific initialization (e.g., symlinking Rails credential keys)
• Configuration via .taskyou.yml or convention-based bin/worktree-setup

Configuration Options

Option 1: Configuration file

Create a .taskyou.yml (or .taskyou.yaml) file in your project root:

worktree:
  init_script: bin/worktree-setup

Option 2: Convention-based

If no config file exists, TaskYou will automatically run bin/worktree-setup if it exists and is executable.

Environment Variables

The init script receives these environment variables:

• WORKTREE_TASK_ID: The task ID
• WORKTREE_PORT: The allocated port for the task
• WORKTREE_PATH: The path to the worktree

Example Use Case: Rails Credentials

#!/bin/bash
# bin/worktree-setup

MAIN_REPO=$(git worktree list | head -1 | awk '{print $1}')
ln -sf "$MAIN_REPO/config/master.key" config/master.key
ln -sf "$MAIN_REPO/config/credentials/development.key" config/credentials/development.key

Behavior

• Script runs after worktree creation but before the app is started
• Script runs with the worktree directory as cwd
• Non-zero exit codes are logged as warnings but don't block worktree creation
• Script output is captured and logged

Test plan

• Unit tests for LoadProjectConfig function
• Unit tests for GetWorktreeInitScript function
• Tests verify config file precedence (.taskyou.yml > .taskyou.yaml)
• Tests verify executable check for conventional script
• All existing tests pass

🤖 Generated with Claude Code