use serde::{Deserialize, Serialize};
#[derive(Debug, Clone, Serialize, Deserialize, Default)]
pub struct TokenUsage {
pub model: Option<String>,
pub input_tokens: u64,
pub output_tokens: u64,
pub cache_read_tokens: u64,
pub cache_write_tokens: u64,
pub total_tokens: u64,
pub estimated_cost_usd: f64,
pub api_calls: u32,
#[serde(default)]
pub subagent_usage: Vec<TokenUsage>,
}