/undo reverts chat message but does NOT revert file changes

[CodeBreaker-web]

Description

/undo only reverts the AI's response text in the conversation history, but does NOT revert the actual file modifications that were made by that response. After running /undo, the files on disk remain modified. This contradicts the documented behavior, which states that /undo should revert file changes.

Plugins

No response

OpenCode version

opencode TUI 1.3.0

Steps to reproduce

Steps to reproduce:

1. Open opencode TUI in a git repository
2. Ask the AI to modify any file (e.g. add a blank line)
3. AI applies the change successfully — file is modified on disk
4. Run /undo
5. The chat message is reverted (removed from conversation), but the file on disk remains unchanged — the modification is NOT undone
6. Running /undo multiple times does not help
   Expected behavior: Per the documentation, /undo should revert all file changes made by that message, restoring files to their original state.

Screenshot and/or share link

No response

Operating System

Ubuntu 20.04.6 LTS, Linux 5.15.0-67-generic x86_64

Terminal

X-terminal-emulator

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• /undo command only rolls back AI conversation message, not the associated file changes #5474: /undo command only rolls back AI conversation message, not the associated file changes
• /undo and /timeline undo does not revert file edits #4704: /undo and /timeline undo does not revert file edits
• /undo only the conversation will be rolled back, but the files will not. #29520: /undo only the conversation will be rolled back, but the files will not.
• /undo only rolls back conversation, not file changes — Windows OpenCode Desktop v1.15.11 #29522: /undo only rolls back conversation, not file changes (Windows Desktop)

[blakkd]

I also encountered the described issue. All I can say is that I resolved it by deleting the repo and cloning it back from the remote. It seems the .git directory was in a bad state, and opencode relies on it for the /undo feature