# Claude Code v2.1.236 发布：新增默认模型环境变量与跨会话闲置通知

- 来源：Claude Code：GitHub Releases（RSS）
- 作者：ashwin-ant
- 发布时间：2026-08-20 04:02
- AIHOT 分数：45
- AIHOT 链接：https://aihot.virxact.com/items/cmt0kq2xq0791ro2oq60xuz9q
- 原文链接：https://github.com/anthropics/claude-code/releases/tag/v2.1.236

## AI 摘要

Claude Code v2.1.236 新增 ANTHROPIC_DEFAULT_MODEL 环境变量，可设置新会话默认模型，且 /model 选择仍可覆盖并跨重启保留。

## 正文

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