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Claude Code Changelog

2 items

Version-by-version record of Claude Code. Every version number and flag we publish is read from here.

Agents

Claude Code 2.1.238 stops memory growth in long sessions

The August 20 release fixes what got in the way during long stretches of work rather than adding features. Tool results returned by subagents are now freed as soon as they leave the recent-view window, so memory in long interactive sessions stops growing without a ceiling. The release also fixes custom output styles sliding back to the default tone mid-session, along with a run of stalls in Remote Control. A new keybindingFlavor setting restores Bash behavior, where Ctrl+W deletes back to the previous space, and claude mcp list no longer starts disabled servers just to check their status.

AnthropicAugust 21verified

Agents

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.

AnthropicAugust 20verified