Claude Code 2.1.235 to 2.1.237: Concise style, ANTHROPIC_DEFAULT_MODEL, and spell checking
Three releases in three days change several things about daily work. Version 2.1.237 introduces a built-in Concise output style, in which Claude leads with the result and skips the preamble and the recap, and fixes prompt caching for sessions that go through a proxy gateway or a custom base URL. Version 2.1.236 adds the ANTHROPIC_DEFAULT_MODEL environment variable, which sets the model new sessions start on, and a notify_when_idle option that asks another session to report when it frees up. Version 2.1.235 introduces optional spell checking through aspell, hunspell, or ispell, and reduces memory and processor use for sessions running in the cloud.
Source
Claude Code 2.1.235–2.1.237: stil Concise, ANTHROPIC_DEFAULT_MODEL i provjera pravopisaClaude Code Changelog · Original published August 20, 2026
Three releases in three days. The biggest difference in daily work comes from the built-in Concise output style, but there is also a long-requested variable for the default model and one security fix worth not skipping.
Version 2.1.237 and the Concise style
In this style Claude leads with the result and skips the preamble and the recap of what it just did, while doing the work just as thoroughly. You pick it under Output style in /config.
Prompt caching was also fixed for sessions that go through a proxy gateway or a custom base URL. If you run Claude through your own proxy, that is a direct saving, because the cache used to fall away and the bill was higher than it should have been.
Version 2.1.236: default model, notification, and the sandbox
ANTHROPIC_DEFAULT_MODELsets the model new sessions start on. A manual choice with/modelstill wins and survives a restart, which is how it differs from the olderANTHROPIC_MODELvariable.- The
notify_when_idleoption in cross-session messaging asks another session on the same machine to report the next time it is idle. It fires once, requires explicit consent, involves no polling, and works on macOS and Linux. - In the macOS sandbox, deny-read rules by pattern such as
**/.envnow take precedence inside allowed areas, cover the contents of matched folders, and cannot be bypassed by renaming a file.
Version 2.1.235 and spell checking
Misspelled words are now optionally underlined in the input box as you type, through an installed aspell, hunspell, or ispell. A bug that invalidated the entire prompt cache when the language server disconnected or reconnected mid-session was also fixed.
Related
A proxy that stripped one header was doubling Claude Code's API bill
Version 2.1.239 fixes streaming on Bedrock behind proxies that remove the response Content-Type header. Claude Code silently fell back to re-running every turn without streaming, and each turn was billed twice. The same release makes cost estimates show the 1.1× premium that data-residency workspaces pay.
Anthropicverified
ChatGPT now reads and sends your Apple Messages, on the Mac only
A plug-in in the ChatGPT desktop app reads and searches your iMessage, SMS and RCS threads and sends messages through Messages on your behalf. By default nothing goes out until you approve both the text and the recipients. There is a switch that removes that step, and OpenAI's own documentation argues against using it.
OpenAIverified
GitHub Copilot moved into Slack and Microsoft Teams on the same day
Both shipped on August 21 in public preview. Mention @GitHub in a channel and the agent triages issues, investigates failures, writes changes in a cloud sandbox and opens a pull request, with the conversation attached. The interesting part is not the capability list, which is familiar, but the room it moved into: the place where work gets discussed rather than written.
GitHubverified