[FEATURE] VS Code Extension should warn when reading/writing unsaved files or use unsaved version

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I'm often editing files that Claude is also working on, if I forget to save my changes he doesn't see the latest content and I either lose changes (either mine or his) or I get conflicts to resolve.

Proposed Solution

When Claude Code edits a file that has unsaved changes in the editor, it should either warn the user before proceeding or, ideally, read/edit the in-memory buffer rather than the on-disk version.

Alternative Solutions

_No response_

Priority

Medium - Would be very helpful

Feature Category

Developer tools/SDK

Use Case Example

_No response_

Additional Context

_No response_