Enum ExecutionEventData 

pub enum ExecutionEventData {
    ExecutionStarted {
        parent: Option<ParentLink>,
        metadata: Option<Value>,
    },
    StepStarted {
        step_id: StepId,
        parent_step_id: Option<StepId>,
        step_type: StepType,
        name: String,
    },
    StepCompleted {
        step_id: StepId,
        output: Option<String>,
        duration_ms: u64,
    },
    StepFailed {
        step_id: StepId,
        error: ExecutionError,
    },
    ExecutionPaused {
        reason: String,
    },
    ExecutionResumed,
    ExecutionCompleted {
        output: Option<String>,
        duration_ms: u64,
    },
    ExecutionFailed {
        error: ExecutionError,
    },
    ExecutionCancelled {
        reason: String,
    },
    ArtifactStored {
        artifact_id: String,
        step_id: StepId,
        content_hash: String,
        size_bytes: u64,
    },
    StepDiscovered {
        step_id: StepId,
        discovered_by: Option<StepId>,
        source_type: StepSourceType,
        reason: String,
        depth: u32,
    },
    ToolCallStarted {
        step_id: Option<StepId>,
        tool_call_id: String,
        tool_name: String,
        input: Value,
    },
    ToolCallCompleted {
        step_id: Option<StepId>,
        tool_call_id: String,
        output: Value,
    },
    CheckpointSaved {
        step_id: Option<StepId>,
        checkpoint_id: String,
        state_hash: String,
    },
    GoalEvaluated {
        step_id: Option<StepId>,
        goal_id: String,
        status: String,
        score: Option<f64>,
        reason: Option<String>,
    },
    Custom {
        event_type: String,
        data: Value,
    },
}

Event data that can be stored

These events represent all state transitions in an execution. They can be replayed to reconstruct execution state.

Variants

ExecutionStarted

Execution started

Fields

parent: Option<ParentLink>

metadata: Option<Value>

StepStarted

A step started

Fields

step_id: StepId

parent_step_id: Option<StepId>

step_type: StepType

name: String

StepCompleted

A step completed successfully

Fields

step_id: StepId

output: Option<String>

duration_ms: u64

StepFailed

A step failed

Fields

step_id: StepId

error: ExecutionError

ExecutionPaused

Execution paused

Fields

reason: String

ExecutionResumed

Execution resumed

ExecutionCompleted

Execution completed successfully

Fields

output: Option<String>

duration_ms: u64

ExecutionFailed

Execution failed

Fields

error: ExecutionError

ExecutionCancelled

Execution cancelled

Fields

reason: String

ArtifactStored

Artifact stored

Fields

artifact_id: String

step_id: StepId

content_hash: String

size_bytes: u64

StepDiscovered

A step was dynamically discovered during execution

Emitted when the agentic loop or LLM output identifies new work. Enables audit trails for discovered steps and replay of discovery sequences.

Fields

step_id: StepId

The discovered step’s ID

discovered_by: Option<StepId>

Which step discovered this new work (if any)

source_type: StepSourceType

What triggered the discovery

reason: String

Human-readable reason for discovery

depth: u32

Discovery depth (how deep in the discovery chain)

ToolCallStarted

A tool call started (input available)

Fields

step_id: Option<StepId>

tool_call_id: String

tool_name: String

input: Value

ToolCallCompleted

A tool call completed (output available)

Fields

step_id: Option<StepId>

tool_call_id: String

output: Value

CheckpointSaved

A checkpoint was saved

Fields

step_id: Option<StepId>

checkpoint_id: String

state_hash: String

GoalEvaluated

A goal was evaluated

Fields

step_id: Option<StepId>

goal_id: String

status: String

score: Option<f64>

reason: Option<String>

Custom

Custom event (for extensibility)

Fields

event_type: String

data: Value

Trait Implementations

impl Clone for ExecutionEventData

fn clone(&self) -> ExecutionEventData

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExecutionEventData

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ExecutionEventData

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ExecutionEventData

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

where __S: Serializer,

Serialize this value into the given Serde serializer.