v2.19.0 (2026-07-27)

What's Changed

🚀 Features

• Add headers and retry_after to ModelHTTPError, populate from all provider SDKs by @dmontagu in #6733

🐛 Bug Fixes

• Re-assert absorbed external cancellation at run step boundaries by @DouweM in #6496

📦 Dependencies

• Update FastMCP dependency range to <4 by @adtyavrdhn in #6737

Full Changelog: v2.18.0...v2.19.0