Struct ResultMessage 

pub struct ResultMessage {

    pub subtype: ResultSubtype,
    pub is_error: bool,
    pub duration_ms: u64,
    pub duration_api_ms: u64,
    pub ttft_ms: Option<u64>,
    pub ttft_stream_ms: Option<u64>,
    pub time_to_request_ms: Option<u64>,
    pub num_turns: i32,
    pub result: Option<String>,
    pub session_id: String,
    pub total_cost_usd: f64,
    pub usage: Option<UsageInfo>,
    pub permission_denials: Vec<PermissionDenial>,
    pub errors: Vec<String>,
    pub uuid: Option<String>,
    pub api_error_status: Option<u16>,
    pub stop_reason: Option<String>,
    pub terminal_reason: Option<String>,
    pub fast_mode_state: Option<String>,
    pub model_usage: Option<BTreeMap<String, ModelUsageEntry>>,
}

Result message for completed queries

Fields

subtype: ResultSubtype

is_error: bool

duration_ms: u64

duration_api_ms: u64

ttft_ms: Option<u64>

Time to first token, in milliseconds.

ttft_stream_ms: Option<u64>

Time to first streamed token, in milliseconds.

time_to_request_ms: Option<u64>

Time from session start until the first request was issued, in milliseconds.

num_turns: i32

result: Option<String>

session_id: String

total_cost_usd: f64

usage: Option<UsageInfo>

permission_denials: Vec<PermissionDenial>

Tools that were blocked due to permission denials during the session

errors: Vec<String>

Error messages when is_error is true.

Contains human-readable error strings (e.g., “No conversation found with session ID: …”). This allows typed access to error conditions without needing to serialize to JSON and search.

uuid: Option<String>

api_error_status: Option<u16>

HTTP status code when the result is an API error (e.g., 429, 500, 529)

stop_reason: Option<String>

Why generation stopped (e.g., end_turn, max_tokens)

terminal_reason: Option<String>

Why the session ended (e.g., “completed”)

fast_mode_state: Option<String>

Fast mode toggle state (e.g., “off”)

model_usage: Option<BTreeMap<String, ModelUsageEntry>>

Per-model cost breakdown, keyed by model name (e.g. "claude-opus-4-8").

Trait Implementations

impl Clone for ResultMessage

fn clone(&self) -> ResultMessage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ResultMessage

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ResultMessage

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ResultMessage

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

where __S: Serializer,

Serialize this value into the given Serde serializer.