Struct Message 

pub struct Message {
    pub role: Role,
    pub content: Option<String>,
    pub name: Option<String>,
    pub tool_call_id: Option<String>,
    pub tool_calls: Option<Vec<ToolCall>>,
    pub reasoning_content: Option<String>,
    pub prefix: Option<bool>,
}

Fields

role: Role

default role is User

content: Option<String>

The content may be null for assistant messages (only when tool_calls are present)

name: Option<String>

Optional name to identify a user or function

tool_call_id: Option<String>

Required when role = “tool”; links to the previous tool call ID

tool_calls: Option<Vec<ToolCall>>

Present when role = “assistant” and the model requested tool calls

reasoning_content: Option<String>

Reasoning content produced by the model (may appear only in responses)

prefix: Option<bool>

Beta: if true, forces the model to begin its reply with the prefix content provided in this assistant message

Implementations

impl Message

pub fn new(role: Role, message: &str) -> Self

pub fn user(message: &str) -> Self

pub fn assistant(message: &str) -> Self

pub fn system(message: &str) -> Self

pub fn is_auto_summary(&self) -> bool

Returns true if this is an auto-generated summary message produced by a built-in Summarizer implementation.

Auto-summary messages are Role::System messages whose name field is set to AUTO_SUMMARY_TAG. They may be replaced on subsequent summarization passes. All other Role::System messages are permanent user-provided prompts and must never be removed by a summarizer.

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 Default for Message

fn default() -> Message

Returns the “default value” for a type.

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.