Struct HarnessUsage 

pub struct HarnessUsage {
    pub input_tokens: u64,
    pub output_tokens: u64,
    pub cache_read_input_tokens: u64,
    pub cache_creation_input_tokens: u64,
    pub compaction_input_tokens: u64,
    pub compaction_output_tokens: u64,
}

Token / cache usage reported by the model client at the end of a turn.

Kept independent of any wire format (no grpc::* import) so the harness crate stays a pure domain library. The core::native_adapter layer converts this to the proto SessionUsage shape on the way out.

Fields

input_tokens: u64

Total input tokens spent this turn (main steps + compaction summarize calls combined). Same field the wire SessionUsage surfaces today — keeps HR’s existing dashboards correct.

output_tokens: u64

Total output tokens this turn (main + compaction).

cache_read_input_tokens: u64

Cache-read tokens (Anthropic). 0 = unknown / not applicable.

cache_creation_input_tokens: u64

Cache-create tokens (Anthropic). 0 = unknown / not applicable.

compaction_input_tokens: u64

Subset of input_tokens spent specifically on compaction summarize calls. 0 = no compaction ran this turn (or it ran but the provider didn’t report usage). Surfaced in tracing for now; not yet wired to proto SessionUsage — when HR wants the breakdown on the wire, add fields to the proto + map in native_adapter::harness_usage_to_proto.

compaction_output_tokens: u64

Subset of output_tokens spent on compaction.

Trait Implementations

impl Clone for HarnessUsage

fn clone(&self) -> HarnessUsage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HarnessUsage

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

Formats the value using the given formatter.

impl Default for HarnessUsage

fn default() -> HarnessUsage

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for HarnessUsage

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for HarnessUsage

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for HarnessUsage

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 HarnessUsage