Windsurf: Cascade Fully Retired From Stable Devin Desktop

WindsurfSep 8, 2026View original changelog

Windsurf's Devin Desktop v3.9.19 completed the retirement of Cascade on the stable release channel, three days after the same change first appeared in the Next beta builds. Devin Local is now the only agent available to every stable Devin Desktop user, with a Continue in Devin Local prompt offered to migrate existing Cascade conversations. The same release simplified the agent location picker to Local, Worktree, and Cloud, added batch archive controls to the agent inbox, and fixed several dev-container and Remote-WSL connection issues.

Key Takeaways

Cascade is now gone for every stable Devin Desktop user, not just those opted into the Next beta channel, completing a retirement that first surfaced there on September 5.
Devin Local is the sole remaining agent inside Devin Desktop, the Rust-rewritten successor Cognition has positioned as up to 30% more token-efficient than Cascade.
A "Continue in Devin Local" prompt automatically offers to migrate any existing Cascade conversation into the new agent, avoiding manual history copying.
The agent location picker was simplified to Local, Worktree, and Cloud, folding worktrees into a searchable submenu instead of listing each as a top-level option.
The agent inbox gained batch controls, letting users archive or unarchive multiple sessions at once with per-row checkboxes instead of one at a time.
The release also fixed dev-container and Remote-WSL activation issues that had been blocking some users from attaching Devin Local to their existing development environments.

Cascade's Retirement Reaches Every Stable User

Windsurf's Devin Desktop version 3.9.19, released September 8, 2026, marks the point where Cascade disappears from the version of the app almost everyone actually runs. Cognition first removed Cascade from the Next channel, the IDE's opt-in beta track, on September 5. That earlier change was explicitly scoped to Next users only, and stable-channel users kept Cascade in the meantime. With v3.9.19, the removal reached the stable channel too, so Cascade is now gone for the entire user base rather than just the small group testing pre-release builds.

Devin Local, the agent that replaces Cascade, was rewritten from scratch in Rust earlier in 2026 and is up to 30% more token-efficient than the agent it succeeds. It now carries the full weight of local, in-editor coding on its own. Anyone who still has an open Cascade conversation is offered a Continue in Devin Local prompt that migrates the existing thread into the new agent, so no history has to be copied over by hand.

A Simpler Agent Picker

With Cascade out of the picture, the agent location picker in Devin Desktop was reorganized around just three top-level choices: Local, Worktree, and Cloud. Worktrees, which previously cluttered the picker as separate entries, now live in a searchable nested submenu instead, cutting down on picker sprawl for anyone juggling several branches at once.

Smaller Changes in the Same Release

The rest of v3.9.19 is a bundle of smaller quality-of-life fixes and polish rather than headline features:

The agent sidebar now shows sessions updated in the last 30 days by default, and the agent inbox gained per-row checkboxes for batch archiving or unarchiving multiple sessions at once.
Trigger menus for /, @, and ! no longer pop open when followed by whitespace, and Cmd/Ctrl+F now opens find-in-page inside Devin Review and other embedded web surfaces.
Pull request cards picked up new actions, including Open Devin Review, Open in Desktop tab, Close PR, and Git settings, and Checkout branch now finds and offers a choice between matching local clones.
Windsurf fixed dev-container attachment for containers using a uid:gid remote user, Remote-WSL activation on a fresh install, and MCP registry fetches behind corporate proxies.
Clipboard images can now be pasted directly into the New Session page, and the Problems panel routes issues to Devin Local automatically now that Cascade is disabled.

Taken together, the release closes out a migration that Cognition had been staging gradually since Windsurf's rebrand to Devin Desktop in June 2026, with Cascade's Next-channel removal on September 5 serving as the dress rehearsal for this stable rollout.