Use ediff as the diff engine

[JonathanReeve]

It'd be great if agent-shell used ediff as the diff engine. In claude-code-ide (and I'm guessing gemini-code-ide which is just a light fork), any change that requires user approval will be shown in the familiar two-pane ediff buffer, with its familiar keybindings. Agent-shell seems to roll its own, as far as I can tell, which seems unnecessary if there's already good diff behavior in emacs.

Checklist

• I've read the README's Issues section.
• I'm running the latest agent-shell version.
• I'm running the latest agent version (ie. Claude Code, Geminig CLI).
• I'm running the latest agent ACP package (ie. claude-code-acp).
• For requesting new agent support, I'm including a link to the ACP-capable agent or related ACP package.
• For issues, I'm including ACP traffic (as per README).

[xenodium]

Thank you for the feature request!

It'd be great if agent-shell used ediff as the diff engine.

If you haven't used agent-shell for long, I'd say please give its diff experience a chance. It's been optimized to navigate and accept/reject things quite quickly, with fairly familiar bindings (and easily discoverable). I've iterated on this experience quite a bit to integrate well with ACP agents. It's no coincidence ediff support hasn't been requested until now, despite agent-shell gaining quite a few users.

Agent-shell seems to roll its own, as far as I can tell, which seems unnecessary

agent-shell uses the built-in diff-mode, with some customizations to hide noise, offer only ACP-supported features, and prettify things a little. There's no guarantee that ediff features will be compatible with ACP, leading users to undefined behaviour.

Having said all that, if you've given agent-shell's diff a fair try, I'd be happy to introduce diff hooks so anyone can bring their preferred diff experience. Hope that makes sense.