ai-agent 0.13.4

Idiomatic agent sdk inspired by the claude code source leak
Documentation 
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use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct TokenBudget {
    pub total: u32,
    pub used: u32,
    pub reserved: u32,
}

impl TokenBudget {
    pub fn new(total: u32) -> Self {
        Self {
            total,
            used: 0,
            reserved: 0,
        }
    }

    pub fn remaining(&self) -> u32 {
        self.total
            .saturating_sub(self.used)
            .saturating_sub(self.reserved)
    }

    pub fn available(&self) -> u32 {
        self.total.saturating_sub(self.used)
    }

    pub fn consume(&mut self, amount: u32) {
        self.used = self.used.saturating_add(amount);
    }

    pub fn reserve(&mut self, amount: u32) {
        self.reserved = self.reserved.saturating_add(amount);
    }

    pub fn release(&mut self, amount: u32) {
        self.reserved = self.reserved.saturating_sub(amount);
    }

    pub fn reset(&mut self) {
        self.used = 0;
        self.reserved = 0;
    }

    pub fn percent_used(&self) -> f64 {
        if self.total == 0 {
            return 0.0;
        }
        (self.used as f64 / self.total as f64) * 100.0
    }

    pub fn is_exhausted(&self) -> bool {
        self.remaining() == 0
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_token_budget() {
        let mut budget = TokenBudget::new(1000);

        assert_eq!(budget.remaining(), 1000);

        budget.consume(300);
        assert_eq!(budget.used, 300);
        assert_eq!(budget.remaining(), 700);

        assert!((budget.percent_used() - 30.0).abs() < 0.01);
    }
}