2.2.0b1 (2026-08-27)
Breaking Changes
ResponseUsageInputTokensDetails.cache_write_tokensis now required by the latest AgentServer contract.
Features Added
- Added prompt caching and programmatic tool-calling models from the latest AgentServer contract.
Bugs Fixed
- Made
logprobsoptional in assistant output-text content to match the OpenAI Responses API runtime behavior. - Added validation for prompt-cache options and tool-call caller discriminators.