Enum A2aMethod 

pub enum A2aMethod {
    SendMessage,
    SendStreamingMessage,
    GetTask,
    ListTasks,
    CancelTask,
    SubscribeToTask,
    CreateTaskPushNotificationConfig,
    GetTaskPushNotificationConfig,
    ListTaskPushNotificationConfigs,
    DeleteTaskPushNotificationConfig,
    GetExtendedAgentCard,
}

Every method A2A defines, as of v1.0.

One variant per method, so an unknown name cannot be confused with a known one at the type level: lookup returning None is the only way to reach -32601.

A2A has no notifications at v1.0; every method is a request a peer answers. The wire surface is request-only.

Variants

SendMessage

SendMessage — send a message to an agent.

SendStreamingMessage

SendStreamingMessage — streaming version of SendMessage.

GetTask

GetTask — get the latest state of a task.

ListTasks

ListTasks — list tasks with optional filtering and pagination.

CancelTask

CancelTask — cancel a task in progress.

SubscribeToTask

SubscribeToTask — subscribe to task updates for a non-terminal task.

CreateTaskPushNotificationConfig

CreateTaskPushNotificationConfig — register a push notification config for a task. The webhook URL on this config is the SSRF surface T27’s push-notification follow-up has to filter.

GetTaskPushNotificationConfig

GetTaskPushNotificationConfig — fetch a push notification config.

ListTaskPushNotificationConfigs

ListTaskPushNotificationConfigs — list push notification configs.

DeleteTaskPushNotificationConfig

DeleteTaskPushNotificationConfig — remove a push notification config.

GetExtendedAgentCard

GetExtendedAgentCard — fetch the authenticated extended agent card.

Implementations

impl A2aMethod

pub const ALL: [Self; 11]

Every method, in the order the specification introduces them.

Exists so a test can assert the direction a per-name test cannot: that every variant is reachable from a name, not merely that every name has a variant. A method added to the enum and forgotten in lookup is otherwise a -32601 waiting to happen.

pub const fn as_str(self) -> &'static str

The wire name of this method, as the v1.0 specification defines it.

PascalCase to match the proto file and the gRPC service. The 0.2.x / 0.3.x slash-separated form (message/send, tasks/get) is not reachable from this method, by design — the bridge (T28) is where the form mismatch is resolved.

Trait Implementations

impl Clone for A2aMethod

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for A2aMethod

impl Debug for A2aMethod

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

Formats the value using the given formatter.

impl Eq for A2aMethod

impl Hash for A2aMethod

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for A2aMethod

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for A2aMethod