Scenario 02: Show Toast Notifications on File Edit Events

User Prompt

Create an OpenCode plugin that shows a toast notification whenever a file is edited. The toast should say "File edited: {filename}". Use the event hook to listen for file edit events.

Expected Behavior

1. Implement the plugin as an async factory function with correct TypeScript typing
2. Use the event hook to listen for events from OpenCode
3. Declare the event handler as async
4. Filter incoming events to handle only file edit/write events
5. Call the appropriate TUI API (e.g., client.tui.showToast) to display the notification with the filename

Success Criteria

• Uses event hook: Plugin implements the event hook to listen for events
• Async event handler: The event handler is async
• Filters for file edit events: Checks event type to handle only file edit/write events
• Uses client.tui.showToast or equivalent: Calls the appropriate TUI API to display the toast notification
• Plugin structure is correct: Async factory function returning hooks object with proper TypeScript typing

Failure Conditions

• Uses a synchronous hook handler instead of async
• Does not filter events and reacts to all event types indiscriminately
• Fails to call any TUI API to display the toast (e.g., only logs to console)
• Implements the plugin as a plain object rather than an async factory function
• Does not use the event hook (e.g., polls for changes instead)