Feature request: Diff preview + granular accept/reject workflow in OpenAI Codex VS Code extension

Hi everyone,

I’d like to propose an improvement specifically for the official OpenAI Codex extension for Visual Studio Code (Codex – OpenAI’s coding agent).

Right now, when this extension performs code edits, it applies changes directly to the file. That works fine for small adjustments, but it quickly becomes hard to see exactly what was modified in medium or larger edits.

This lowers visibility and control over the changes the AI makes, especially compared to other tools like GitHub Copilot, which shows a diff and lets you accept or reject edits before they’re applied.

Feature request

Please consider adding a workflow where:

• The extension shows a diff preview before applying edits

• Users can accept or reject changes per hunk or block

• It integrates with VS Code’s native diff/patch UI

Even a basic “Preview changes before applying” option would already be a big usability improvement.

This would enhance transparency, trust, and control — especially in professional workflows where reviewing code changes is critical.