Warnings

Providers return warnings when a call uses an unsupported feature, a compatibility mode, a deprecated setting, or something else worth knowing. LogWarnings.Log prints them.

Turn them off or handle them yourself

// Suppress all warnings.
LogWarnings.Logger = false;

// Receive every warning, including repeated deprecations.
LogWarnings.Logger = (Action<LogWarningsOptions>)(options =>
{
    // options.Warnings, options.Provider, options.Model
});

Set LogWarnings.Logger back to null to use the default logger.

Language model warnings

A language model call returns its warnings in LanguageModelGenerateResult.Warnings as CallWarning values. Type is the category, such as unsupported or compatibility. For those two types, Feature names the setting or feature, for example temperature, and Message holds the details. Feature is null when a provider does not set it yet.

Deprecation warnings

The default logger emits each deprecation code once. Its type is DeprecationWarning, and every message carries a stable AISDK_DEP_* code. A provider deprecation is scoped to the provider, so the same setting from two models of one provider prints once.

LogWarnings.ProcessEmitWarning receives the message, the type, and the code (null for ordinary warnings). When it is null, LogWarnings.ConsoleWarn receives the message with the code in brackets, for example [AISDK_DEP_GENERATE_OBJECT] ....

Deprecations.GetDeprecationCode(setting, provider) returns the code for a setting. A setting without a registered code gets AISDK_DEP_SETTING_ plus the encoded setting name. A provider setting gets AISDK_DEP_PROVIDER_<provider>__<setting>. Characters other than A-Z, a-z, and 0-9 are encoded as _ plus four hex digits.

Code	Deprecated usage
AISDK_DEP_GENERATE_OBJECT	generateObject
AISDK_DEP_STREAM_OBJECT	streamObject
AISDK_DEP_EXPERIMENTAL_GENERATE_SPEECH	experimental_generateSpeech
AISDK_DEP_EXPERIMENTAL_TRANSCRIBE	experimental_transcribe
AISDK_DEP_IMAGE_CONTENT_PART	image message parts
AISDK_DEP_TOOL_RESULT_*	legacy tool-result content types
AISDK_DEP_UI_MESSAGE_RAW_INPUT	rawInput in UI tool parts

Use LogWarnings.ResetState() in tests to clear the remembered codes.