Struct MessageMetadata 

pub struct MessageMetadata {
    pub completed_at: Option<i64>,
    pub duration_ms: Option<u64>,
    pub model: Option<String>,
    pub provider: Option<String>,
    pub token_usage: Option<TokenUsage>,
    pub stats: Option<ExecutionStats>,
    pub finish_reason: Option<FinishReason>,
    pub cost: Option<CostInfo>,
}

Message metadata (AI SDK compatible)

Fields

completed_at: Option<i64>

When response completed (Unix ms)

duration_ms: Option<u64>

Total duration in ms

model: Option<String>

Model used (e.g., “gpt-4o”, “claude-3-opus”)

provider: Option<String>

Provider (e.g., “azure”, “anthropic”)

token_usage: Option<TokenUsage>

Token usage (aggregated across all LLM calls)

stats: Option<ExecutionStats>

Execution statistics

finish_reason: Option<FinishReason>

Why the response finished

cost: Option<CostInfo>

Cost information (if available)

Trait Implementations

impl Clone for MessageMetadata

fn clone(&self) -> MessageMetadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MessageMetadata

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

Formats the value using the given formatter.

impl Default for MessageMetadata

fn default() -> MessageMetadata

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for MessageMetadata

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for MessageMetadata

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

where __S: Serializer,

Serialize this value into the given Serde serializer.