Session & Interface Mastery/The Three Interfaces
Intermediate8 min

The VS Code Extension — Deep Integration Patterns

The VS Code extension integrates Claude Code into your editor with inline diffs, Chrome extension auto-detection, and shared session state. It wins when staying in IDE flow matters more than full CLI power.

Quick Reference

  • →Inline diffs: accept/reject file changes in the editor gutter — no terminal switch needed
  • →Integrated terminal: Claude runs in VS Code's own terminal, sharing project context
  • →Chrome extension: auto-detected when installed — no --chrome flag needed
  • →File context: Claude sees the file you have open without @ references
  • →Session list: sidebar for resuming and forking sessions
  • →When CLI beats extension: scripting, pipe mode, SSH, fine-grained flag control
  • →JetBrains (Beta): Cmd+Esc launch, separate subscription, capability gap vs CLI

Inline Diffs

The defining feature of the VS Code extension is inline diff review. When Claude edits a file, the changes appear directly in the editor as a diff overlay — green for additions, red for removals. You accept or reject changes without leaving the editor.

This is meaningfully different from the CLI workflow, where you review file changes in the terminal output and then look at the modified file. The inline diff keeps you in the edit context — you see the change in the code, not as a diff report.

  • ▸Accept a single change with a click in the gutter
  • ▸Reject a single change and it reverts immediately
  • ▸Accept all changes in a file at once
  • ▸See the diff in context of the surrounding code — not stripped to changed lines only