Bug: AI emptied html to 0 bytes during file edit

Description

What happened

The opencode AI agent deleted the entire contents of orbitian-studios.html while performing edits on other HTML files in the same directory. The file went from approximately 712 lines of production HTML/CSS/JS code to 0 bytes (completely empty).

I did not request this file to be edited. The agent appears to have accidentally wiped it while working on other files in the project.

Expected behavior

• The agent should only edit files the user explicitly asks to modify
• A file should never go from N bytes to 0 bytes without explicit user confirmation
• There should be a safeguard against writing empty content to a file

What I lost

• A full page (~712 lines) of HTML/CSS/JS for a music production studio website (Orbitian Studios)
• Days of work on this specific file
• No git history was initialized in the project, so local recovery was not possible

Steps to reproduce

1. Have a project folder with multiple .html files (index.html, servicios.html, orbitian-studios.html, etc.)
2. Ask opencode to edit one or more files in the project
3. opencode modifies files but also empties orbitian-studios.html entirely without being asked

Environment

• OS: macOS Sequoia, Apple Silicon M4, 16GB RAM
• Project: static HTML/CSS/JS website (no frameworks)
• Model used: [add the model name from your session here]

Suggestion

Add a safety check: before writing to any file, verify the new content is not empty. If the content is empty, abort the write operation and warn the user. This would prevent accidental data loss.

Plugins

No response

OpenCode version

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Steps to reproduce

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Screenshot and/or share link

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Operating System

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Terminal

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