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Harness providers

中文说明

The fake providers a scenario runs against. Each one stands in for an external platform boundary: it answers only from what the scenario declared, never opens a connection to a live service, and keeps an inspectable record of the calls it received. That is what lets a scenario assert what the orchestration did instead of whether some service happened to be up.

Files

File Responsibility
__init__.py Exports the scripted LLM and its structured error type.
scripted_llm.py A model callable backed by a queue of scripted steps. It returns the declared normalized responses in order (filling in the usual reasoning, usage, finish_reason and raw defaults), raises ScriptedProviderError wherever the script declared an error, and reports how many steps are left; every incoming message list is deep-copied into calls, so a scenario can inspect the prompt afterwards. Running off the end of the script raises AssertionError rather than repeating the last reply.
.gitkeep Keeps the directory tracked in git so the next fake provider has somewhere to land.

The script a provider replays is the provider_script field validated by ../schema.py, and ../runner.py is what drives it. A future compute, endpoint, or lab fake belongs here too, as long as it stays offline by default.