Struct UsageRecord 

pub struct UsageRecord {
    pub session_id: String,
    pub parent_session: Option<String>,
    pub project: Option<String>,
    pub request_id: Option<String>,
    pub model: Option<String>,
    pub ts: Option<Timestamp>,
    pub usage: Usage,
    pub sidechain: bool,
    pub thinking_chars: u64,
    pub thinking_encrypted: bool,
    pub has_thinking: bool,
}

One deduplicated API request with its finalized usage.

Fields

session_id: String

parent_session: Option<String>

Parent session id when this spend came from a sub-agent transcript.

project: Option<String>

request_id: Option<String>

model: Option<String>

ts: Option<Timestamp>

usage: Usage

sidechain: bool

Request belongs to a sub-agent (sidechain) transcript.

thinking_chars: u64

Visible extended-thinking chars measured across this request’s lines — the basis for thinking ATTRIBUTION. These tokens are ALREADY counted inside usage.output (Claude Code, verified), so this answers “how much of output was thinking”, never an addition to the billable total. 0 when there was no thinking, or when every thinking block was encrypted (thinking_encrypted).

thinking_encrypted: bool

Thinking blocks were present but none were measurable (encrypted/redacted: "thinking":"" + signature). The thinking share of output is unknown here — surfaced as such, never guessed (CLAUDE.md §8.5). On the sampled machine ~85% of thinking requests were encrypted, so this is the common case.

has_thinking: bool

Thinking blocks were present at all (measurable or encrypted).

Trait Implementations

impl Clone for UsageRecord

fn clone(&self) -> UsageRecord

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UsageRecord

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

Formats the value using the given formatter.

impl Serialize for UsageRecord

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

where __S: Serializer,

Serialize this value into the given Serde serializer.