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v2.1.236 Claude Code Release Notes

Aug 19, 2026
Claude's Analysisby Sonnet 5
Full Analysis

New ANTHROPIC_DEFAULT_MODEL env var sets each session's starting model. Also fixes fullscreen renderer crash-loops, clipboard/session breakage, and WSL subprocess crashes.

Changes
33
Total Changes (vs Average)
2.6×
Version Type
Patch
Release Focus
Mixed
Day Since Prior Release
1
Release # This Month
#15 of 19
Bug Fix Ratio
48%
Post-Release Edits
—
Change Category
Ecosystem Impact
Terminals has appeared in 5 of the last 10 releases and gets 5 more fixes here (fullscreen renderer crash-loop, tmux title flicker, resize repaint) — sustained polish of the terminal rendering layer.
Key Themes
3Model selection controls|16Broad stability pass|5Auto mode & sandbox hardening|4Cross-session coordination & accessibility
May Help If You've Noticed
Copy/paste, background sessions, or MCP logs stopped working after removing a working directory
Fullscreen terminal mode broke permanently after one failed launch attempt
The /model picker overflowed the screen, cutting off model choices
Claude Code crashed running PowerShell from WSL with Windows interop disabled
Tmux/iTerm tab titles flickered or jumped constantly during sessions

Changes in Claude Code v2.1.236

Added3 changes

  • •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)
  • •[VSCode] Added screen reader support for the transcript: live announcements for replies, permission requests, errors, and status changes, plus per-turn heading navigation

Improved4 changes

  • •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

Fixed16 changes

  • •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

Changed1 change

  • •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

Other9 changes

  • •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
  • •/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

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