Claude Code v2.1.236 发布：新增默认模型配置与跨会话空闲通知

更新内容

• 新增 ANTHROPIC_DEFAULT_MODEL 环境变量：用于设置新会话启动时使用的模型；通过 /model 选择的模型仍可覆盖该设置，并会在重启后保持生效（不同于 ANTHROPIC_MODEL）。
• 为跨会话 SendMessage 新增 notify_when_idle：可请求本机上的另一 Claude Code 会话在其下次进入空闲状态时发送一条通知——需主动启用、仅触发一次、无需轮询（macOS 和 Linux）。
• Sandbox：在 macOS 上，通配符读取拒绝规则（例如 **/.env）现在会在允许读取的区域内优先执行，覆盖匹配目录中的内容，且不能通过重命名被拒绝的文件来绕过。
• 修复了会话切换到的目录被删除后，剪贴板复制、后台维护任务、后台会话和本地 MCP 日志失效的问题（自 2.1.229 起存在）。
• 修复全屏渲染器在一次启动失败后永久失效的问题：现在会回退到经典渲染器，而不是在之后每次启动时退出。
• 修复 /model 选择器显示高度超过终端的问题：现在只显示窗口可容纳数量的模型，其余模型可通过滚动访问。
• 修复当格式错误的闭合标签导致消息文本留在摘要字段中时，SendMessage 调用被拒绝的问题。
• 修复子进程启动失败时未处理的 Promise 拒绝问题，例如在禁用 Windows 互操作的 WSL 中启动 powershell.exe 时（2.1.234 中引入的回归）。
• 修复全屏模式下终端调整大小后，新发送的消息有时要到下一次更新才显示的问题。
• 修复全屏模式下清除多行提示词后，提示词上方可能残留空白区域，以及终端缩小后再恢复时窗格未重绘的问题。
• 修复托管设置审批提示有时未在启动时出现、却仍将第一次按键视为审批的问题。
• 修复 tmux 中终端标签标题跳动的问题（iTerm tmux 集成）：现在仅在标题文本变化时写入标题，而不再每 960 毫秒更新一次。
• 修复云环境列表返回为空或格式错误时出现不清晰错误提示的问题。
• 修复使用 Remote Control 时，Fable 5 首次使用额度提示在 60 秒未得到回应后自动选择备用模型的问题。
• 修复当 ~/.claude.json 中缓存的访客通行证奖励格式错误时，加载动画提示始终不显示且反复产生后台错误的问题。
• 修复 SDK/VS Code 会话中的技能热重载问题：当会话工作目录被删除后，每次技能变更都会报错（2.1.229+）。
• 修复自托管 Runner 会话在因空闲、退役或启动超时而释放后，偶尔会在后置会话钩子完成前于另一 Runner 上恢复的问题。
• 修复 Clawd 吉祥物的眼睛和脚部在 iTerm2 的某些字体大小下显示不均匀的问题。
• 修复偶发的会话回顾文本无限增长问题：回顾文本（自动生成及 /recap）现在限制为 400 个字符，并在词边界处截断。
• 改进启动性能：会话计数器现在在后台写入。
• 改进自动模式：自动模式启用期间，Monitor 允许规则将被暂时搁置，因此 Monitor 命令将与 Bash 命令一样接受审查。
• 改进 Bedrock、Vertex AI、Foundry 平台以及禁用遥测时的自动模式：分类器现在采用与 Claude API 相同的默认设置，包括按严重程度评分的分类。
• 改进自动模式：Git 状态检查不再会被仓库的 status.showUntrackedFiles=no 设置误导，从而错误报告工作树干净。
• 调整 /model 选择器：现在只高亮最新模型的名称，使高亮标记新发布的模型，而不是列表中任意一部分模型。
• /goal：目标因长时间运行的后台工作而被搁置的空闲会话，现在会在 30 分钟后自动主动联系用户（随后为 1 小时、2 小时），而不再等待用户返回。
• /usage 现在会为 Team 和 Enterprise 成员显示使用额度消费行，并在尚未产生任何消费时以 0% 显示上限行。
• print/SDK 模式下收到 SIGTERM 时，不再在退出前记录中断的轮次或合成的工具拒绝；正在运行的命令仍会被终止，进程仍以退出代码 143 退出。
• 在输入错误的斜杠命令或当前会话不可用的命令后按 Enter，现在会报告该问题，而不会执行最接近的模糊匹配；前缀和别名仍可正常执行。
• 当 CLI 退出或其终端关闭时，Remote Control 现在会在数秒内将会话标记为离线。
• SendMessage 现在会在快速连续发送将超过目标会话收件箱可接受范围时，预先拒绝后续消息，而不再显示消息已发送但实际被丢弃。
• 将提示词边框上的会话标题标签与页脚右边缘对齐。
• 右对齐的页脚项目（目标指示器、会话状态、后台 Agent 状态）以及被截断的通知，现在与提示词区域其余部分保持一致的右侧边距。
• [VSCode] 为对话记录新增屏幕阅读器支持：包括对回复、权限请求、错误和状态变化的实时播报，以及按轮次标题导航。

1. Releases
2. v2.1.236

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What's changed

• Added ANTHROPIC_DEFAULT_MODEL environment variable: sets the model new sessions start on, while a /model pick still overrides it and persists across restarts (unlike ANTHROPIC_MODEL)
• Added notify_when_idle to cross-session SendMessage: ask another Claude Code session on this machine to send one notice when it next goes idle — opt-in, one-shot, no polling (macOS and Linux)
• Sandbox: on macOS, wildcard read-deny rules (e.g. **/.env) now take precedence inside allowed read regions, cover matched directories' contents, and can't be bypassed by renaming the denied file
• Fixed clipboard copy, background housekeeping, background sessions, and local MCP logs breaking after the directory a session had switched into was removed (since 2.1.229)
• Fixed the fullscreen renderer failing permanently after a single failed start: it now falls back to the classic renderer instead of exiting on every subsequent launch
• Fixed the /model picker rendering taller than the terminal: it now shows only as many models as fit the window, with the rest reachable by scrolling
• Fixed SendMessage calls being rejected when a malformed closing tag left the message text inside the summary field
• Fixed unhandled promise rejections when a subprocess fails to start, for example powershell.exe on WSL with Windows interop disabled (regression in 2.1.234)
• Fixed fullscreen mode sometimes not showing a newly sent message until the next update after the terminal was resized
• Fixed a blank band that could remain above the prompt after clearing a multi-line prompt, and panes not repainting after resizing the terminal away and back, in fullscreen mode
• Fixed the managed-settings approval prompt sometimes not appearing at startup while still capturing the first keypress as approval
• Fixed terminal tab titles jumping in tmux (iTerm tmux integration): the title is now written only when its text changes instead of animating every 960ms
• Fixed an unclear error when the cloud environments list came back empty or malformed
• Fixed the Fable 5 first-time usage-credits prompt auto-selecting the fallback model after 60 seconds with no answer when using Remote Control
• Fixed spinner tips never appearing, with a repeated background error, when the cached guest-pass reward in ~/.claude.json was malformed
• Fixed skills hot-reload in SDK/VS Code sessions raising an error on every skills change after the session's working directory was deleted (2.1.229+)
• Fixed self-hosted runner sessions released on idle, retire, or startup timeout occasionally resuming on another runner before the post-session hook had finished
• Fixed the Clawd mascot's eyes and feet rendering unevenly in iTerm2 at some font sizes
• Fixed occasional runaway session recaps: recap text (automatic and /recap) is now capped at 400 characters, cut at a word boundary
• Improved startup performance: the session counter is now written in the background
• Improved auto mode: Monitor allow rules are now set aside while auto mode is active, so Monitor commands are reviewed the same way Bash commands are
• Improved auto mode on Bedrock, Vertex AI, and Foundry, and when telemetry is disabled: the classifier now uses the same defaults as on the Claude API, including severity-scored classification
• Improved auto mode: the git status check can no longer be fooled by a repo's status.showUntrackedFiles=no setting into reporting a clean tree
• Changed the /model picker to highlight only the newest model's name, so the highlight marks the new release rather than an arbitrary subset of the list
• /goal: an idle session whose goal is parked behind long-running background work now checks in automatically after 30 minutes (then 1h, 2h) instead of waiting for you to return
• /usage now shows the usage-credits spend row for Team and Enterprise members, and shows a capped row at 0% before anything is spent
• SIGTERM in print/SDK mode no longer records an interrupted turn or synthetic tool denials before exiting; running commands are still terminated and the process still exits with code 143
• Pressing Enter on a slash-command typo or a command unavailable in this session now reports it instead of running the closest fuzzy match; prefixes and aliases still run
• Remote Control now marks a session offline within seconds when the CLI exits or its terminal closes
• SendMessage now refuses further messages to a session up front once a rapid burst would exceed what that session's inbox accepts, instead of reporting them sent while they were dropped
• Aligned the session title chip on the prompt border with the footer's right edge
• Right-aligned footer items (goal indicator, session state, background agent status) and truncated notices now share a consistent right margin with the rest of the prompt area
• [VSCode] Added screen reader support for the transcript: live announcements for replies, permission requests, errors, and status changes, plus per-turn heading navigation

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