v0.84.0

0.84.0 (2026-09-02)

Features

• api: update usage APIs and documentation (#566) (caac1f0)

Bug Fixes

• accept custom request hash in RBS (#554) (8d32aa1)
• avoid dispatching nil checks during coercion (#552) (c8d6d32)
• avoid duplicate late-choice stream logprobs (#564) (2359a02)
• delimit JSONL request records (#553) (dea0408)
• enforce workload identity request deadlines (#547) (da421b5)
• handle custom chat completion tool calls (#556) (dd49e31)
• load YAML for BaseModel serialization (#555) (5420931)
• make error cause contract read-only (#557) (f3169ca)
• preserve formatter path boundaries (#559) (f8b128c)
• respect StringIO cursor in multipart uploads (#558) (e8ea7c7)
• resume Responses streams from server-side cursors (#548) (3b88261)
• support flattened responses typed function tools (#550) (ab16d33)
• support structured chat output with typed function tools (#546) (087d1e2)

Chores

• deps-dev: bump the development-dependencies group with 3 updates (#560) (f728e07)