- Fix: added the
Adaptivevariant to theThinkingenum. - Exposed
custom_systemin the web Settings UI, and clarified thatcustom_promptis only for the Claude Webpromptfield. - Claude Code now emulates
claude-code/2.1.76more closely, includingUser-Agent: claude-code/2.1.76on Claude Code requests. - Claude Code requests now prepend a 2.1.76-compatible billing system header before
custom_system, using sampled characters from the first user message and fixedcch=00000.