Struct TokenBudget 

pub struct TokenBudget {
    pub max_tokens: usize,
    pub used_tokens: usize,
    pub chars_per_token: f32,
    pub max_tool_output_tokens: usize,
}

Token budget for context assembly

Fields

max_tokens: usize

used_tokens: usize

chars_per_token: f32

Characters per token estimate. Varies by backend and language mix. English/code ~3.5, Chinese ~1.8, mixed ~2.5. Default: 3.0.

max_tool_output_tokens: usize

Max tokens for a single tool output before truncation. Default: 2000.

Implementations

impl TokenBudget

pub fn new(max_tokens: usize) -> Self

pub fn with_chars_per_token(self, chars_per_token: f32) -> Self

pub fn remaining(&self) -> usize

pub fn estimate_tokens(&self, text: &str) -> usize

Estimate tokens for a string using the configured chars_per_token ratio.

Trait Implementations

impl Clone for TokenBudget

fn clone(&self) -> TokenBudget

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TokenBudget

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

Formats the value using the given formatter.

impl Default for TokenBudget

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for TokenBudget

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for TokenBudget

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

where __S: Serializer,

Serialize this value into the given Serde serializer.