Under the hood
Runner session cleanup code was renamed internally with no behavioral change found
What
The block of code that handles cleanup when a session fails to spawn or is released—unmounting, running the post-session hook, flushing debug logs, and removing worktree and session state—is structurally the same as before. The only differences found were internal variable renames from the build process.
Why
This appears to be incidental renaming rather than a change to how session cleanup behaves.