Struct StateSnapshot 

#[non_exhaustive]
pub struct StateSnapshot<S: State> {
    pub state: S,
    pub checkpoint_id: String,
    pub step: u32,
    pub thread_id: String,
    pub parent_checkpoint_id: Option<String>,
    pub created_at: SystemTime,
    pub next_nodes: Vec<String>,
}

Complete snapshot of graph execution state at a point in time.

Used for:

• Human-in-the-loop: show state to human before they decide to resume
• Time travel: inspect or resume from any past checkpoint
• Debugging: see what the state looked like at each superstep

Example

let snapshot = graph.get_state("thread-1").await?;
if let Some(snap) = snapshot {
    println!("Step {}: next nodes = {:?}", snap.step, snap.next_nodes);
}

NOTE: #[non_exhaustive] — will grow with metadata, branch info, etc.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

state: S

The full state at this checkpoint.

checkpoint_id: String

Unique identifier for this checkpoint.

step: u32

Which superstep this was taken at.

thread_id: String

Thread this checkpoint belongs to.

parent_checkpoint_id: Option<String>

The checkpoint this one was derived from (if any).

created_at: SystemTime

When this checkpoint was created.

next_nodes: Vec<String>

Which nodes are scheduled to run next. Empty if the graph completed or hit recursion limit.

Trait Implementations

impl<S: Clone + State> Clone for StateSnapshot<S>

fn clone(&self) -> StateSnapshot<S>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<S: Debug + State> Debug for StateSnapshot<S>

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

Formats the value using the given formatter.