Stagehand + zod 4: Invalid schema for response_format, type None
Stagehand's published types imported zod/v3 internals, so a v4 install silently produced type: "None" schemas that the model provider rejects. The team's fix was to pin zod to ^3.25.0 (PR #1032, released in 2.5.0) while they finished proper v4 support, which landed via commit f27a99c in later 2.5.x. If you hit t…
Problem outcome: unknown