Struct Checkpoint 

pub struct Checkpoint {
    pub id: String,
    pub run_id: RunId,
    pub graph_id: Option<GraphId>,
    pub current_node: Option<String>,
    pub state: Value,
    pub messages: Vec<MessageRecord>,
    pub tool_results: HashMap<String, Value>,
    pub created_at: DateTime<Utc>,
    pub metadata: HashMap<String, Value>,
}

Checkpoint - saved state of execution

Fields

id: String

Unique checkpoint ID

run_id: RunId

Run this checkpoint belongs to

graph_id: Option<GraphId>

Graph being executed

current_node: Option<String>

Current node in execution

state: Value

State at this checkpoint

messages: Vec<MessageRecord>

Messages history (for LLM agents)

tool_results: HashMap<String, Value>

Tool results collected so far

created_at: DateTime<Utc>

Created timestamp

metadata: HashMap<String, Value>

Metadata

Implementations

impl Checkpoint

pub fn new(run_id: RunId) -> Self

Create a new checkpoint

pub fn with_state(self, state: Value) -> Self

Set the current state

pub fn with_node(self, node: impl Into<String>) -> Self

Set the current node

pub fn add_message( &mut self, role: impl Into<String>, content: impl Into<String>, )

Add a message to history

pub fn add_tool_result(&mut self, tool_name: impl Into<String>, result: Value)

Add a tool result

pub fn with_agent_name(self, name: impl Into<String>) -> Self

Set the agent name in metadata

pub fn agent_name(&self) -> Option<&str>

Get the agent name from metadata

Trait Implementations

impl Clone for Checkpoint

fn clone(&self) -> Checkpoint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Checkpoint

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Checkpoint

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Checkpoint

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

where __S: Serializer,

Serialize this value into the given Serde serializer.