isAnthropicLanguageModel
function isAnthropicLanguageModel(model): boolean;Returns true when the model is an Anthropic Claude model (direct provider, OpenRouter pass-through, or Vertex Anthropic). Used to gate the cache-control wiring — applying it to non-Anthropic providers is a wasted property on the message that other providers ignore but it adds clutter we don’t need to ship.
Parameters
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Returns
Section titled “Returns”boolean