v3.1.0

3.1.0 (2026-05-22)

Full Changelog: v3.0.2...v3.1.0

Features

• api: improve sse support (98575ff)
• internal: implement indices array format for query and form serialization (4c876b3)
• support setting headers via env (05acb32)
• internal/types: support eagerly validating pydantic iterators (8d18837)

Bug Fixes

• api: TTS WebSockets require context_id (dbccae8)
• api: WebSocket Error Response should have fewer required properties (2ab3768)
• client: preserve hardcoded query params when merging with user params (07061f5)
• deps: bump minimum typing-extensions version (2960fb8)
• ensure file data are only sent as 1 parameter (63c9488)
• pydantic: do not pass by_alias unless set (b3dad90)
• sanitize endpoint path params (d0dfe8f)
• tts: Fix errors relating to context_id incorrectly being optional (8f9461a)
• tts: WebsocketResponse.Error (56438a0)
• use correct field name format for multipart file arrays (d4e2141)
• tts: prevent orphaned ws connections from multiple enter calls (d9c2b91)

Performance Improvements

• client: optimize file structure copying in multipart requests (7e8eb23)

Documentation

• api: fix doc links (cf73e5d)

Chores

• ci: bump uv version (de7662b)
• ci: remove release-doctor workflow (441755f)
• ci: skip lint on metadata-only changes (fe9f0c9)
• ci: skip uploading artifacts on stainless-internal branches (9f6be90)
• internal: add request options to SSE classes (fa68332)
• internal: make test_proxy_environment_variables more resilient (fe46748)
• internal: make test_proxy_environment_variables more resilient to env (46ed179)
• internal: more robust bootstrap script (2628482)
• internal: reformat pyproject.toml (d4c875f)
• internal: tweak CI branches (9dfe6d2)
• internal: update gitignore (823c4ae)
• internal: version bump (b16a3e8)
• internal: version bump (aa1f88f)
• tts: add more descriptions (b1cf472)
• update placeholder string (03b3ef8)