Struct AgentMessage 

#[non_exhaustive]
pub struct AgentMessage {
    pub message_id: MessageId,
    pub content: MaybeUndefined<Vec<ContentBlock>>,
    pub meta: MaybeUndefined<Meta>,
}

Available on crate feature unstable_protocol_v2 only.

An agent message upsert.

Only AgentMessage::message_id is required. content has patch semantics: an omitted field leaves existing message content unchanged, null clears the value, and a concrete array replaces the previous value. For a new messageId, omitted fields use client defaults. content is replaced as a whole array; send [] or null to clear it.

Message updates and chunks are applied in the order they are received. When an agent_message update includes content, that array replaces any content previously accumulated for the message, including content from earlier chunks. Later chunks with the same messageId append to the current content.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

message_id: MessageId

A unique identifier for the message.

content: MaybeUndefined<Vec<ContentBlock>>

Complete replacement content for this message.

meta: MaybeUndefined<Meta>

The _meta property is reserved by ACP to allow clients and agents to attach additional metadata to their interactions. Omitted leaves the stored metadata unchanged; null clears it. An object patches the stored metadata by top-level key: keys it omits are unchanged, a key set to null is removed, and any other value replaces that key’s stored value without merging nested objects. Beyond this patch rule, implementations MUST NOT make assumptions about values at these keys.

See protocol docs: Metadata Patches

Implementations

impl AgentMessage

pub fn new(message_id: impl Into<MessageId>) -> Self

Builds AgentMessage with the required fields set; optional fields start unset or empty.

pub fn content( self, content: impl IntoMaybeUndefined<Vec<ContentBlock>>, ) -> Self

Complete replacement content for this message.

pub fn meta(self, meta: impl IntoMaybeUndefined<Meta>) -> Self

Patches, clears, or leaves unchanged message metadata.

A concrete object patches stored metadata by top-level key; see apply_meta_update.

Trait Implementations

impl Clone for AgentMessage

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AgentMessage

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AgentMessage

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for AgentMessage

impl JsonSchema for AgentMessage

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl PartialEq for AgentMessage

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for AgentMessage

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for AgentMessage