Struct TokenUsage 

pub struct TokenUsage {
    pub input_tokens: Option<u64>,
    pub cached_input_tokens: Option<u64>,
    pub cache_write_input_tokens: Option<u64>,
    pub output_tokens: Option<u64>,
    pub reasoning_output_tokens: Option<u64>,
    pub total_tokens: Option<u64>,
}

Token usage reported by the CLI for a single run.

Field names align with codex-wrapper’s TokenUsage so an adapter can map the two directly (see the cross-crate design in issue #760). Serde aliases accept the Anthropic key names the CLI actually emits (cache_read_input_tokens, cache_creation_input_tokens), the same keys the on-disk history accounting reads, so the live and read-side paths agree.

Every field is Option because the CLI does not report all buckets on every turn. A missing bucket means “not reported”, not zero; Session::turns_missing_usage exists so callers can tell a low total from an incomplete one.

Fields

input_tokens: Option<u64>

Non-cached input tokens.

cached_input_tokens: Option<u64>

Input tokens served from cache.

cache_write_input_tokens: Option<u64>

Input tokens written to cache.

output_tokens: Option<u64>

Output tokens.

reasoning_output_tokens: Option<u64>

Output tokens spent on reasoning, where the CLI reports them separately.

total_tokens: Option<u64>

Explicit total, where the CLI reports one.

Implementations

impl TokenUsage

pub fn total(&self) -> u64

Total tokens for this run: the explicit total_tokens if the CLI reported one, otherwise the sum of every reported bucket. Cache and non-cache input both count, mirroring the on-disk accounting in the history module.

pub fn is_empty(&self) -> bool

True when the CLI reported no usage buckets at all.

Trait Implementations

impl Clone for TokenUsage

fn clone(&self) -> TokenUsage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TokenUsage

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

Formats the value using the given formatter.

impl Default for TokenUsage

fn default() -> TokenUsage

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for TokenUsage

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for TokenUsage

impl PartialEq for TokenUsage

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for TokenUsage

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 TokenUsage