Trylle

Changes

Changes made from outside the app, such as from the but CLI, now appear in the desktop app automatically without a manual refresh
Adds an "Uncommit changes" option to the committed hunk context menu
Adds Antigravity as a selectable editor for "Open in Editor"
Redesigned how upstream changes are integrated into a branch: a new update button in the branch list opens a redesigned modal that shows how your branch has diverged from its remote, lets you choose an integration strategy, and previews the result before you apply it

Fixes a bug where GitHub OAuth failures showed a "missing field" error instead of the actual error response from GitHub
Fixes an issue where a new branch created on top of pushed commits was incorrectly styled as already pushed; branch styling now follows the branch's own push status
Fixes the stacked-PR footer "part X of N" count so it matches each PR's position badge
Fixes an issue where edit-mode refs (gitbutler/edit) were left behind after leaving edit mode
Fixes an issue where "Open in Editor" failed to open the project in Zed

--json has been replaced by --format json
Adds but branch update to integrate a branch's upstream changes, with selectable strategies (built-in templates or custom steps)
Fixes some Codex specific issues causing the tool to underperform compared to Claude Code
but now warns when an agent's skill files are stale and refreshes them automatically
Fixes a bug where but apply reported success and exited 0 even when the branch was left unapplied due to conflicts; it now fails with a clear error
Fixes a bug where but rub zz commit did not amend all changes
Fixes a bug where but branch show could not find branches that were not at the head of a stack
Fixes a bug where the cache directory was never created, so but never stored its update-check result
Improved the error message when creating a branch whose path prefix collides with an existing branch

You can now mark multiple uncommitted files in the TUI and commit or discard them together
You can now move multiple uncommitted files at once in the TUI
Improved the labels shown when moving branches in the TUI

Full Changelog: https://github.com/gitbutlerapp/gitbutler/compare/release/0.20.0...release/0.20.1