Behaviour for modules that supply a list of Planck.AI.Model structs.

Cloud providers (Anthropic, OpenAI, Google)

These source their catalog from LLMDB, a bundled snapshot of the public model registry. No network call is made at query time — the data is loaded from the package artifact into :persistent_term on first access.

Local providers (Ollama, llama.cpp)

These fetch the model list from the running local server at call time, so the returned list reflects whatever models are currently loaded.

Error handling

All implementations must return [] on any failure — they must never raise.