Added4
- 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
Fixed4
- 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`
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