- **Signature:** Sequence-3 convention: `__main__` must keep an explicit typed parameter list covering every input (int/float/str) and build the record from those args before scoring; keep aligned with the block schemas.
## Schema notes
-`request_schema.json` and `response_schema.json` for this block are frozen. They describe arrays of `{name, value}` dicts (no nested dict-of-dicts), so that structure must be preserved—do not switch these schemas to dict-of-dicts or object-of-dicts even as the block code evolves. Arrays-of-dicts are still allowed where schematically appropriate.