The example is: @task(name="analyze_data", compute="MEDIUM", ram="512MB", timeout="30s", max_retries=1) def analyze_data(dataset: list) -> dict:

The example is: @task(name="analyze_data", compute="MEDIUM", ram="512MB", timeout="30s", max_retries=1) def analyze_data(dataset: list) -> dict: # Your code runs safely in a Wasm sandbox return {"processed": len(dataset), "status": "complete"} This is fundamentally awkward in a language with as absurdly flexible a type system as Python. What if that list parameter contains objects that implement __getattr__? What if the output dict has an overridden __getattr__? Even defining semantics seems awkward, especially if one wants those semantics to simultaneously make sense and have any sort of clear security properties. edit: a quick look at the source suggests that the output is deserialized JSON regardless of what the type signature says. That’s certainly one solution.