Struct AgentCheckpoint 

pub struct AgentCheckpoint {
    pub messages: Vec<Message>,
    pub iterations: usize,
    pub total_tool_calls: usize,
    pub output_tokens: usize,
    pub reasoning_tokens: usize,
    pub compact_count: usize,
    pub stop_reason: Option<StopReason>,
}

Agent Checkpoint 投影 — 可序列化的快照。

只包含需要持久化的字段，不包含运行时字段（如 last_response）。 这是 P0-1 Checkpoint Projection 的核心：Runtime State 可以包含 不可序列化字段，Checkpoint 只序列化必要字段。

Fields

messages: Vec<Message>

消息历史

iterations: usize

当前迭代轮次

total_tool_calls: usize

累计工具调用总数

output_tokens: usize

累计输出 Token 数

reasoning_tokens: usize

累计推理 Token 数

compact_count: usize

累计压缩次数

stop_reason: Option<StopReason>

停止原因

Trait Implementations

impl Clone for AgentCheckpoint

fn clone(&self) -> AgentCheckpoint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AgentCheckpoint

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AgentCheckpoint

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for AgentCheckpoint

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

where __S: Serializer,

Serialize this value into the given Serde serializer.