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LlmCallUsage

harn_vm::tracing

Struct LlmCallUsage 

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pub struct LlmCallUsage {
    pub model: String,
    pub provider: String,
    pub input_tokens: i64,
    pub output_tokens: i64,
    pub cache_read_tokens: i64,
    pub cache_write_tokens: i64,
    pub cost_usd: Option<f64>,
}
Expand description

Structured per-LLM-call token and cost attribution for an llm_call span. Built once at the call site and lowered to metadata pairs via LlmCallUsage::metadata_pairs so every emission uses the canonical meta keys instead of ad-hoc strings. cost_usd is None when the (provider, model) pair has no catalog pricing.

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§model: String§provider: String§input_tokens: i64§output_tokens: i64§cache_read_tokens: i64§cache_write_tokens: i64§cost_usd: Option<f64>

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impl LlmCallUsage

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pub fn metadata_pairs(&self) -> Vec<(&'static str, Value)>

Lower to (key, value) pairs keyed by the canonical meta constants, suitable for annotate_current_span / span_set_metadata.

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impl Clone for LlmCallUsage

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fn clone(&self) -> LlmCallUsage

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for LlmCallUsage

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

Formats the value using the given formatter. Read more
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impl Default for LlmCallUsage

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fn default() -> LlmCallUsage

Returns the “default value” for a type. Read more
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impl PartialEq for LlmCallUsage

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

Tests for self and other values to be equal, and is used by ==.
1.0.0 (const: unstable) · Source§

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

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

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