Claude Code v2.1.19

Added env var CLAUDE_CODE_ENABLE_TASKS, set to false to keep the old system temporarily

Added shorthand $0, $1, etc. for accessing individual arguments in custom commands

Changed skills without additional permissions or hooks to be allowed without requiring approval

Changed indexed argument syntax from $ARGUMENTS.0 to $ARGUMENTS[0] (bracket syntax)

[SDK] Added replay of queued_command attachment messages as SDKUserMessageReplay events when replayUserMessages is enabled

[VSCode] Enabled session forking and rewind functionality for all users

Fixed crashes on processors without AVX instruction support

Fixed dangling Claude Code processes when terminal is closed by catching EIO errors from process.exit() and using SIGKILL as fallback

Fixed /rename and /tag not updating the correct session when resuming from a different directory (e.g., git worktrees)

Fixed resuming sessions by custom title not working when run from a different directory

Fixed pasted text content being lost when using prompt stash (Ctrl+S) and restore

Fixed agent list displaying "Sonnet (default)" instead of "Inherit (default)" for agents without an explicit model setting

Fixed backgrounded hook commands not returning early, potentially causing the session to wait on a process that was intentionally backgrounded

Fixed file write preview omitting empty lines