Struct ChatMessage 

pub struct ChatMessage {
    pub role: String,
    pub content: String,
    pub timestamp: DateTime<Utc>,
    pub tool_call_id: Option<String>,
    pub tool_calls: Option<Vec<Value>>,
    pub name: Option<String>,
    pub reasoning_content: Option<String>,
    pub thinking_blocks: Option<Vec<Value>>,
}

A chat message

Fields

role: String

Message role (user, assistant, system, tool)

content: String

Message content

timestamp: DateTime<Utc>

Message timestamp

tool_call_id: Option<String>

Tool call ID (for tool-result messages)

tool_calls: Option<Vec<Value>>

Tool calls made by the assistant

name: Option<String>

Tool name (for tool-result messages)

reasoning_content: Option<String>

Optional reasoning content captured from thinking-capable models

thinking_blocks: Option<Vec<Value>>

Optional structured thinking blocks (provider-specific)

Implementations

impl ChatMessage

pub fn new(role: impl Into<String>, content: impl Into<String>) -> Self

Create a new chat message

pub fn with_tool_metadata( role: impl Into<String>, content: impl Into<String>, tool_call_id: Option<String>, tool_calls: Option<Vec<Value>>, name: Option<String>, ) -> Self

Create a chat message with full tool metadata

pub fn to_llm_format(&self) -> Value

Convert to LLM format (role and content only)

Trait Implementations

impl Clone for ChatMessage

fn clone(&self) -> ChatMessage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChatMessage

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ChatMessage

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ChatMessage

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

where __S: Serializer,

Serialize this value into the given Serde serializer.