diff --git a/.changeset/fix-world-zod-44-compat.md b/.changeset/fix-world-zod-44-compat.md
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+---
+'@workflow/world': patch
+---
+
+Fix compatibility with Zod 4.4.x in `WorkflowRunSchema` by marking `output`, `error`, and `completedAt` as `.optional()` on non-final / cancelled / completed / failed run states.