Struct SessionMessageChunk 

#[non_exhaustive]
pub struct SessionMessageChunk {
    pub message_id: MessageId,
    pub content: ContentBlock,
    pub meta: Option<Meta>,
}

Available on crate feature unstable_protocol_v2 only.

UNSTABLE

This capability is not part of the spec yet, and may be removed or changed at any point.

A streamed content block of an inter-session message.

A chunk carries only content. The message’s participants and references come from session_message upserts, which can arrive before, between, or after its chunks.

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

Identifier of this message within the enclosing session’s transcript.

content: ContentBlock

A single content block appended to the message.

meta: Option<Meta>

The _meta property is reserved by ACP to allow clients and agents to attach additional metadata to their interactions. Omitted and null are equivalent and mean no metadata. Implementations MUST NOT make assumptions about values at these keys. This metadata is scoped to the chunk and does not patch stored metadata.

See protocol docs: Extensibility

Implementations

impl SessionMessageChunk

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

Available on crate feature unstable_subagents only.

Builds a single streamed content block without chunk metadata.

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

Available on crate feature unstable_subagents only.

Sets optional chunk-scoped metadata.

Trait Implementations

impl Clone for SessionMessageChunk

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 SessionMessageChunk

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SessionMessageChunk

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for SessionMessageChunk

impl JsonSchema for SessionMessageChunk

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 SessionMessageChunk

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for SessionMessageChunk

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 SessionMessageChunk