Module capability_guard 

Request/provider capability validation

Capability Guard

Validates that a ChatRequest only uses parameters the target provider actually supports, based on its LlmCapabilities flags.

In strict mode, unsupported parameters cause an immediate RunnerError rejection. In permissive mode (the default), the function returns warning strings that callers can surface in ChatResponse::warnings.

Functions

validate_capabilities

Validate that a request’s parameters are supported by the provider.