Struct Task 

pub struct Task {
    pub id: String,
    pub context_id: Option<String>,
    pub status: TaskStatus,
    pub artifacts: Vec<Artifact>,
    pub history: Vec<Message>,
    pub metadata: Option<Value>,
}

A unit of work dispatched to or created by an A2A agent.

Tasks are the central concept in the A2A protocol. A caller creates a task by sending a Message via message/send. The agent processes it and returns the completed Task with artifacts and final status.

Fields

id: String

Unique task identifier, assigned by the server on creation.

context_id: Option<String>

Optional session/conversation context shared across multiple tasks.

status: TaskStatus

Current lifecycle state plus timestamp.

artifacts: Vec<Artifact>

Output artifacts produced by the agent for this task.

history: Vec<Message>

Conversation history for this task (may be limited by historyLength on retrieval).

metadata: Option<Value>

Arbitrary key-value metadata for extension without schema changes.

Trait Implementations

impl Clone for Task

fn clone(&self) -> Task

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Task

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Task

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Task

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

where __S: Serializer,

Serialize this value into the given Serde serializer.