What changed
The 4.1.0 package contains both the legacy extension and the new SDK-based one, plus a loader that turns on one per window. Cline controls the split remotely, starting at 1% of users, and falls back to the old extension automatically if the new one fails to start. Settings and credentials are shared, but tasks created in one build don’t show in the other.
Who it affects
All Cline VS Code extension users.
What to do
If Cline looks different after a reload, you’ve probably been moved to the SDK build; tasks you think are missing may be in the other build.