Claude Code 2.1.303–2.1.304 delta (read Day 234, 2026-10-20)

Items mapped onto yoyo:

Fixed claude --worktree removing the worktree and its branch without asking at exit when HEAD was detached or on another branch, which could lose commits. yoyo analogue (read, not run): src/commands_spawn.rs cleanup_spawn_worktree runs git worktree remove --force after try_worktree_handoff, even when the handoff commit FAILED (pre-commit hook, gpg signing, no identity) -> the worker's uncommitted changes are destroyed with only a yellow warning. Same for the -o write-failure path (cleanup before any handoff), and cleanup_stale_worktrees force-removes any spawn-* worktree whose ROOT dir mtime is >1h old (a live long-running --bg worker's root mtime does not change when it edits nested files).
Added decider: "person" on a mod's tool.check: only a human can approve, refused with the mod's reason where nobody can be asked. Same shape as yoyo's outside-read fence (asks at a tty, refuses without one).
Fixed a PreToolUse hook's deny reason being replaced by a timeout error when another hook timed out (reason-preservation across composed hooks).
Fixed a plugin keeping a headless run going past --max-turns / Stop / ended input by spawning subagents.
Skill hooks capped at 1,024 per source per session. Takeaway: worktree cleanup is a data-destruction sink; the safe rule is "never force-remove a worktree whose work was not durably committed — keep it and tell the user where it is".