Struct Message 

pub struct Message {
    pub id: Option<String>,
    pub role: Option<String>,
    pub model: Option<String>,
    pub content: Option<MessageContent>,
    pub usage: Option<TokenUsage>,
    pub extra: HashMap<String, Value>,
}

Message content (user or assistant)

Fields

id: Option<String>

Message ID — used for SSE stream deduplication

role: Option<String>

Role (user, assistant, system)

model: Option<String>

Model string e.g. “claude-sonnet-4-5-20250929”

content: Option<MessageContent>

Content (string or typed block array)

usage: Option<TokenUsage>

Token usage — populated on assistant messages from the API response

extra: HashMap<String, Value>

Additional message metadata

Implementations

impl Message

pub fn content_blocks(&self) -> &[ContentBlock]

Returns typed content blocks (empty slice for legacy string content).

pub fn text_content(&self) -> String

Returns all plain text, handling both legacy strings and block arrays.

pub fn model_short(&self) -> Option<&str>

Model name with date suffix stripped. “claude-sonnet-4-5-20250929” -> “claude-sonnet-4-5”

Trait Implementations

impl Clone for Message

fn clone(&self) -> Message

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Message

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Message

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Message

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

where __S: Serializer,

Serialize this value into the given Serde serializer.