Struct ActionSnapshot 

pub struct ActionSnapshot {
    pub action_id: String,
    pub action_number: usize,
    pub created_at: u64,
    pub tool_name: String,
    pub arguments: Value,
    pub pre_action_message_count: usize,
    pub touched_files: Vec<String>,
    pub expected_outcome: ExpectedOutcome,
}

A snapshot of the agent state taken before executing a single action (tool call).

Unlike turn-level snapshots that capture the full conversation and file state, action snapshots are lightweight records capturing only the state delta before a specific tool call. This enables incremental undo of the last N actions.

Fields

action_id: String

Matches the tool_call_id for this action.

action_number: usize

Sequential counter — strictly increasing per session.

created_at: u64

Unix timestamp (seconds) when the snapshot was created.

tool_name: String

Name of the tool being invoked.

arguments: Value

JSON arguments passed to the tool.

pre_action_message_count: usize

The number of messages in the conversation before this action was executed. Used to truncate the messages vector on rollback.

touched_files: Vec<String>

Files we know were touched by this action (from modified_files).

expected_outcome: ExpectedOutcome

Expected outcome category, used to determine rollback strategy.

Trait Implementations

impl Clone for ActionSnapshot

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ActionSnapshot

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ActionSnapshot

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ActionSnapshot

impl PartialEq for ActionSnapshot

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for ActionSnapshot

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ActionSnapshot