NVIDIA's NOOA framework

Python’s Ellipsis literal (...) is a real object (type(...) is <class 'ellipsis'>), not just a placeholder. Beyond type stubs and numpy slicing, NVIDIA’s NOOA framework repurposes it as a runtime dispatch marker: methods with ... bodies are completed by an LLM at runtime, while methods with real bodies stay deterministic Python. The boundary between “code I control” and “code the model controls” becomes greppable: grep -n '\.\.\.' agent.py. Clever reuse of existing syntax that linters and type checkers already accept.