Struct UsageMeta 

pub struct UsageMeta {
    pub input_tokens: u32,
    pub output_tokens: u32,
    pub cache_creation_tokens: Option<u32>,
    pub cache_read_tokens: Option<u32>,
    pub reasoning_tokens: Option<u32>,
}

Token usage for one or more LLM API calls, as reported by the provider.

Used both per-message (TranscriptEntry.usage) and as a cumulative session total stored in SessionMeta.cost (g156).

Fields

input_tokens: u32

output_tokens: u32

cache_creation_tokens: Option<u32>

Prompt-cache creation tokens (Anthropic / OpenAI).

cache_read_tokens: Option<u32>

Prompt-cache read tokens (Anthropic / OpenAI).

reasoning_tokens: Option<u32>

Reasoning/thinking tokens (DeepSeek R1, o1, etc.).

Implementations

impl UsageMeta

pub fn accumulate(&mut self, other: &UsageMeta)

Accumulate another UsageMeta into self.

pub fn from_token_usage(tu: &TokenUsage) -> Self

Convert from crate::llm::TokenUsage (g156 integration point).

pub fn is_zero(&self) -> bool

Returns true if both input_tokens and output_tokens are zero.

Trait Implementations

impl Clone for UsageMeta

fn clone(&self) -> UsageMeta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UsageMeta

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

Formats the value using the given formatter.

impl Default for UsageMeta

fn default() -> UsageMeta

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for UsageMeta

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for UsageMeta

fn eq(&self, other: &UsageMeta) -> 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 UsageMeta

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for UsageMeta