Struct AgentCapabilities 

pub struct AgentCapabilities {
    pub streaming: bool,
    pub push_notifications: bool,
    pub state_transition_history: bool,
    pub images: bool,
    pub audio: bool,
    pub files: bool,
}

Boolean flags advertising which A2A protocol extensions an agent supports.

The three protocol-defined fields (streaming, push_notifications, state_transition_history) are part of the A2A specification. The modality fields (images, audio, files) are Zeph forward-compatible extensions — they default to false so that peers that do not understand them can safely ignore the fields via #[serde(default)]. If the A2A spec standardises different names for these capabilities in a future revision, a follow-up PR can add the canonical names without breaking existing serialised cards.

Fields

streaming: bool

Agent supports message/stream for real-time SSE output.

push_notifications: bool

Agent supports server-initiated push notifications.

state_transition_history: bool

Agent includes full state-transition history in task responses.

images: bool

Agent can receive and send Part::File entries with image/* media types (#3326).

Defaults to false. Set via AgentCardBuilder::images.

audio: bool

Agent can receive and send Part::File entries with audio/* media types (#3326).

Defaults to false. Set via AgentCardBuilder::audio.

files: bool

Agent can receive and send non-media file attachments via Part::File (#3326).

Defaults to false. Set via AgentCardBuilder::files.

Trait Implementations

impl Clone for AgentCapabilities

fn clone(&self) -> AgentCapabilities

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AgentCapabilities

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

Formats the value using the given formatter.

impl Default for AgentCapabilities

fn default() -> AgentCapabilities

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for AgentCapabilities

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for AgentCapabilities

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

where __S: Serializer,

Serialize this value into the given Serde serializer.