v1.21.0

1.21.0 (2026-05-13)

Full Changelog: v1.20.3...v1.21.0

Features

• internal/types: support eagerly validating pydantic iterators (f089d05)
• metadata: add object metadata viewing, discovery, and validation (#9124) (ba0b5dc)

Bug Fixes

• client: add missing f-string prefix in file type error message (930b1e2)
• update openapi.stainless.yaml for PTY server methods (#9218) (ac1cb22)
• update types for pty control, use int instead of str (#9235) (7ceb2bf)