Claude Code v2.1.181: /config prompt command, Bun 1.4 runtime, and mid-thinking auto-retry
The June 17 Claude Code release adds /config key=value syntax to set any configuration value directly from the prompt — works in interactive, -p, and Remote Control modes. The bundled Bun runtime was upgraded to 1.4, long-paragraph streaming was improved to appear line-by-line, and API connections that drop mid-thinking now auto-retry instead of surfacing a raw error. Fixes land for JetBrains IDE flickering on 2026.1+ and Shift+non-ASCII key drops in Kitty-protocol terminals (WezTerm, Ghostty, kitty).
why it matters/config from inside the session eliminates the need to exit to settings for quick per-session overrides like toggling thinking mode or switching the active model.