View Source Nexlm.Providers.Stub (Nexlm v0.1.15)
Fake provider used in tests to bypass real LLM HTTP calls.
Configure Nexlm to use models prefixed with stub/ and preload responses via
Nexlm.Providers.Stub.Store. Each call dequeues the next stubbed reply,
keeping async ExUnit tests isolated by storing state in the process dictionary.