This gist is a supplemental live-provider reproduction for openai/openai-agents-python#4421, which implements the feature requested in openai/openai-agents-python#4401.
The harness was prepared and verified against commit 4fb4c535b58b7b705f80798c9fd0681e10eed98d. It creates one Modal sandbox, shares that live session across concurrent SandboxAgent runs, and gives every run a distinct SandboxRunConfig.cwd.
It uses ScriptedModel and disables trace export, so it exercises the real SDK runner, sandbox capabilities, and Modal transport without requiring an OpenAI API key or depending on model behavior.