# Claude Code 2.0.43

Captured: 2026-05-10T16:27:28.320Z

- Added `permissionMode` field for custom agents
- Added `tool_use_id` field to `PreToolUseHookInput` and `PostToolUseHookInput` types
- Added skills frontmatter field to declare skills to auto-load for subagents
- Added the `SubagentStart` hook event
- Fixed nested `CLAUDE.md` files not loading when @-mentioning files
- Fixed duplicate rendering of some messages in the UI
- Fixed some visual flickers
- Fixed NotebookEdit tool inserting cells at incorrect positions when cell IDs matched the pattern `cell-N`
