Enum AgentEvent 

pub enum AgentEvent {
    AssistantText {
        delta: String,
    },
    ToolUse {
        tool_use_id: String,
        tool: String,
        input: Value,
    },
    ToolResult {
        tool_use_id: String,
        output: Value,
        is_error: bool,
    },
    Cost {
        cost_usd: f64,
        tokens: TokenCounts,
    },
    Done {
        response: String,
        transcript: Vec<AgentTurn>,
    },
    Error {
        message: String,
    },
}

Discriminated streaming event. Same union for both the agent pane (renders into the UI) and the drone Agent block (accumulates until Done, returns AgentRunResult).

Provider-specific extension goes through a Custom variant reserved here but intentionally not shipped Phase 1.5 — leave the enum open for it. See spec §8 risks.

Variants

AssistantText

Streaming text chunk from the assistant. Agent pane appends to the visible transcript; drone Agent block buffers until Done.

Fields

delta: String

ToolUse

Tool invocation about to run. input is the provider’s raw tool input JSON; renderers may dispatch on tool name.

Fields

tool_use_id: String

tool: String

input: Value

ToolResult

Tool execution result.

Fields

tool_use_id: String

output: Value

is_error: bool

Cost

Final cost + token accounting. Emitted once per run, before Done.

Fields

cost_usd: f64

tokens: TokenCounts

Done

Run completed successfully. response is the final assistant message text (the drone Agent block’s primary output). transcript is the full ordered turn list for audit / replay.

Fields

response: String

transcript: Vec<AgentTurn>

Error

Run failed. message is the user-facing error.

Fields

message: String

Trait Implementations

impl Clone for AgentEvent

fn clone(&self) -> AgentEvent

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AgentEvent

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AgentEvent

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for AgentEvent

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

where __S: Serializer,

Serialize this value into the given Serde serializer.