Strawberry GraphQL @ 0.323.0

Released July 21, 2026 at 10:59 PM GMT+00:00

This release adds an on_stream_result hook to SchemaExtension for extension authors who need to inspect or mutate GraphQL results before they reach a streaming transport.

The hook wraps subscription events and queries or mutations sent over WebSockets, SSE, or multipart responses. On transports that support experimental incremental execution, it also wraps each incremental-delivery frame.

Strawberry’s built-in MaskErrors extension now uses the hook so streamed query, mutation, subscription, incremental-delivery, and pre-execution errors are masked before being sent to clients.

This release was contributed by @Ladol in https://github.com/strawberry-graphql/strawberry/pull/4330

Additional contributors: @pre -commit-ci[bot], @patrick91