v3.57.0

3.57.0 (2026-09-05)

Features

• api: add incomplete web search call status constants (#877) (66688d6)
• api: Add prompt cache diagnostics (#888) (6a8a6a2)
• api: add service-account API key expiration fields (#895) (65785ca)
• api: correct function argument completion event fields (openapi-545) (#889) (b26f72f)

Chores

• api: document throttling and model overload responses — SDK-235 (#896) (52e95a9)
• migrate to forked steady (#882) (a605079)

Documentation

• establish canonical security model (#875) (30b5e81)