Enum AgentEvent 

pub enum AgentEvent {
    Token(String),
    ReasoningToken(String),
    ToolCall(ToolCallChunk),
    ToolResult(ToolCallResult),
}

Events emitted by AgentStream.

Each variant represents a distinct, self-contained event in the agent lifecycle:

• Token(String) — a text fragment from the assistant. In streaming mode each Token is a single SSE delta; in non-streaming mode the full response text arrives as one Token.
• ToolCall(id, name, delta) — a tool call fragment. Behaves exactly like Token: in streaming mode one event is emitted per SSE chunk (first chunk has an empty delta and carries the tool name; subsequent chunks carry incremental argument JSON). In non-streaming mode a single event is emitted with the complete arguments string. Accumulate delta values by id to reconstruct the full argument JSON. Execution begins after all chunks for a turn are delivered.
• ToolResult(ToolCallResult) — a tool has finished executing. One event is emitted per call, in the same order as the corresponding ToolCall events.

Variants

Token(String)

ReasoningToken(String)

Emitted when the model produces reasoning/thinking content (e.g. deepseek-reasoner). In streaming mode this arrives token-by-token before the main reply.

ToolCall(ToolCallChunk)

ToolResult(ToolCallResult)

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.