Suggest refactoring undo

[trainliang]

Description

My project structure has not been easy to use since using opencode undo:
Project structure External-all main project directory (no git or main git), internal three or two multi-end codes are managed by git respectively. In this case, no undo in the system can be used for any code management

It is recommended to refactor undo. Compared with other codex and claudecode, git snapshot cannot satisfy code tracking when there are multiple sub-repositories and there is no git repository at the root of the project, resulting in the inability to roll back code files in a large number of scenarios, and then information is lost, which is a major flaw.

Plugins

/undo

OpenCode version

1.16.2

Steps to reproduce

No response

Screenshot and/or share link

Let me deeply analyze OpenCode’s file operations and undo mechanism in a multi-sub-repository scenario.

The analysis results are very clear. Here are the full conclusions:

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OpenCode Undo tracking problem in multi-sub-repository scenario

Root cause

OpenCode uses a separate hidden Git repository (~/.local/share/opencode/snapshot/{projectId}/) to track file changes instead of using the project's own Git. Before each tool call, create a snapshot with git add . && git write-tree.

**Git itself does not index the contents of sub-Git repositories (including submodules). ** Git treats the submodule directory as a pointer to a specific commit (a blob) and does not track file changes within it.

Specific impact

Capabilities	Main repository files	Submodule files
Edit Modify files	Normal	Normal
Snapshot Tracking	Normal	Unable to Track
/undo Undo	Normal	Do not roll back changes in submodules
Review Panel	Normal	Do not show submodule changes
Diff View	Normal	Do not show submodule changes

Known GitHub Issues Confirmation

• Issue Opencode Desktop - files touched in submodules aren't shown in Review panel #10658: "files touched in submodules aren't shown in Review panel"

"Unfortunately, git will NOT index child git repos (including submodules) and there's no way to make it."

• Issue /undo command only rolls back AI conversation message, not the associated file changes #5474: "any work I do, from a higher-level project, on submodule files, is that not only they don't show up in review, but the /undo doesn't undo anything on those files."

Practical impact in your project

Taking the gaokao-server submodule as an example, 6 files are currently modified (Dockerfile, application-dev.yml, etc.). If I edit files within these submodules during this session:

1. The Edit tool itself works properly — files can be modified correctly
2. But /undo cannot roll back these changes — because the snapshot system cannot track changes within submodules
3. You need to manually restore files within the submodule via git checkout

Comparison at the tool level

Tools	Submodule Change Detection	Submodule Undo
OpenCode snapshot	Untraceable	Cannot Undo
code-review-graph detect_changes	Need to specify submodule repo_root	Not applicable
Native git	Need to enter submodule operation	git checkout can be restored

Possible mitigation options

1. After editing the submodule file, immediately do git commit in the submodule - so that even if undo fails, it can be restored through git revert
2. Create a separate OpenCode project for each submodule — track separately, but lose the unified context across repositories
3. Use JetBrains IDE’s Local History — it does not rely on git and can track file changes in any directory
4. Waiting for an official fix from OpenCode — Issue Opencode Desktop - files touched in submodules aren't shown in Review panel #10658 discussed creating independent snapshots for each submodule, but it has not been implemented so far

Suggestions

For your multi-sub-repository project, the safest way is: after editing the files in the sub-module, directly git add && git commit** in the sub-module instead of relying on OpenCode's /undo. This ensures that the code can be restored through git's native capabilities at any time.

Operating System

macos、debian

Terminal

cli

[github-actions]

This issue doesn't fully meet our contributing guidelines.

What needs to be fixed:

• The "Screenshot and/or share link" field contains an AI-generated wall of text (detailed root cause analysis, comparison tables, mitigation options). Long AI-generated descriptions are not acceptable — please replace this with a concise, human-written description of the problem you're experiencing, or a relevant screenshot/link.

Please edit this issue to address the above within 2 hours, or it will be automatically closed.

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

• /undo does not revert changes inside nested independent git repositories #30065: /undo does not revert changes inside nested independent git repositories — describes the same problem: undo not tracking/reverting changes in nested child git repos when opening OpenCode from a parent non-git directory.
• Opencode Desktop - files touched in submodules aren't shown in Review panel #10658: Opencode Desktop - files touched in submodules aren't shown in Review panel — related issue about submodule tracking.

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[github-actions]

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