Enum ModelWarning 

#[non_exhaustive]
pub enum ModelWarning {
    LossyEncode {
        field: String,
        detail: String,
    },
    UnknownStopReason {
        raw: String,
    },
    UnsupportedCapability {
        capability: String,
        detail: String,
    },
    ProviderExtensionIgnored {
        vendor: String,
    },
}

One non-fatal advisory from a codec or transport. Carried in ModelResponse::warnings and surfaced via observability.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

LossyEncode

The codec could not preserve every IR field on the wire. The vendor will not see (or will see a coerced version of) the named field.

Fields

field: String

IR field that was dropped or coerced (e.g. messages[2].content[0]).

detail: String

Why the loss happened.

UnknownStopReason

The provider returned a stop reason this codec does not yet model; the IR carries it as StopReason::Other.

Fields

raw: String

Raw vendor reason string.

UnsupportedCapability

The IR requested a feature the model doesn’t support (e.g. tools on a vision-only model). The codec proceeded with a degraded request.

Fields

capability: String

Capability name (e.g. streaming, prompt_caching).

detail: String

Detail of what fallback was applied.

ProviderExtensionIgnored

The IR carries a ProviderExtensions entry for a vendor different from the active codec — the codec ignored the foreign knobs because the wire format cannot express them. Operators that route the same request across multiple codecs see one of these warnings per inactive vendor that had ext set.

Fields

vendor: String

Vendor identifier matching the inactive ext field name (anthropic, openai_chat, openai_responses, gemini, bedrock).

Trait Implementations

impl Clone for ModelWarning

fn clone(&self) -> ModelWarning

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ModelWarning

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ModelWarning

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ModelWarning

fn eq(&self, other: &ModelWarning) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ModelWarning

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for ModelWarning

impl StructuralPartialEq for ModelWarning