Show LLM Edit Impact Like GitHub Diffs

[dipseth]

Feature Idea:

Had an idea while using the LLM file editor that might be worth discussing.

The Issue

Sometimes I intend an LLM to make a "small fix" and it ends up rewriting half my file. Then I don't notice something and it rewrites half the app, then my life. There are many steps to mitigate this, but specifically I was thinking..

What if the Roo wants to edit this file component showed GitHub-style diff stats?

Something simple like: +23 -5 ±12 lines right when the LLM presents its changes (while collapsed).

You'd immediately see:

• "Oh, this added 50 lines for what I thought was a one-liner fix"
• "Perfect, just 3 lines changed, that seems right"
• "Hmm, 200 lines modified... maybe I should ask for a more targeted approach"

Could be super minimal

• Just a small line of stats above the diff
• Maybe color-coded (green for small changes, yellow/red for big ones?)
• Doesn't need to be fancy - even text like "47 additions, 12 deletions" would help

Why this could be useful

• Gut check before accepting changes
• Know when to Interrupt changes
• Better prompting - if you see huge changes, you can ask the LLM to be more surgical
• Prevents code bloat from overzealous AI edits
• Familiar UX since we all know GitHub's format

Thoughts?
Could be a quick win that makes the editing flow feel more predictable!