Claude Code v2.1.19 发布啦！

Claude Code v2.1.19 发布啦！

更新内容

添加了环境变量 CLAUDE_CODE_ENABLE_TASKS ，设置为 false 可暂时保留旧系统
为自定义命令中访问单个参数添加了简写形式 $0, $1 等
修复了在不支持 AVX 指令的处理器上的崩溃问题
通过捕获 process.exit() 的 EIO 错误并使用 SIGKILL 作为后备方案，修复了终端关闭时 Claude Code 进程无法终止的问题
修复了从不同目录（如 git 工作树）恢复会话时，/rename 和 /tag 未更新正确会话的问题
修复了从不同目录运行时，通过自定义标题恢复会话无法正常工作的问题
修复了使用提示词存储（ Ctrl+S ）和恢复时，粘贴的文本内容丢失的问题
修复了代理列表显示 "Sonnet (default)" 而不是 "Inherit (default)" 的问题（针对没有显式模型设置的代理）
修复了后台运行的钩子命令不会提前返回的问题，这可能导致会话等待一个被有意置于后台运行的进程
修复了文件写入预览时省略空行的问题
更改为允许没有额外权限或钩子的技能无需批准即可使用
将索引参数语法从 $ARGUMENTS.0 更改为 $ARGUMENTS[0]（括号语法）
SDK：当启用 replayUserMessages 时，添加了将排队命令附件消息作为 SDKUserMessageReplay 事件重播的功能
VSCode：为所有用户启用了会话分叉和回退功能

https://github.com/anthropics/claude-code/releases/tag/v2.1.19
Published: 2026-01-24 05:56:32

What's changed
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
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
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