bug: EditTool Race Condition

[akramcodez]

Description

The EditTool reads a file, waits indefinitely for user confirmation, and then writes the result, overwriting any changes made during the wait.

T1: Agent reads file.txt (Version 1)
T2: Agent waits for user approval (User edits file.txt → Version 2)
T3: User approves agent
T4: Agent writes Version 3 based on Version 1 (Version 2 is lost)

Impact

• Immediate code loss if the user edits the file while the agent is running
• Inconsistent file state in collaborative environments
• Dangerous “last write wins” behavior for AI agents

Potential Fix

Capture file mtime or compute a content hash at read time. Before writing, verify the file hasn’t changed; if it has, abort and request a refresh.

[sahilkhedkar]

Capture the file's modification time (mtime) when initially reading for confirmation. Before executing the edit, verify the current mtime matches the original. If changed, abort the operation and prompt the user to refresh the file content.

[vyagh]

I submitted a PR for this, @sahilkhedkar is still working on their solution, happy to coordinate or close mine if theirs is preferred