Struct ChatTask 

pub struct ChatTask {

    pub id: ChatTaskId,
    pub session_id: String,
    pub session_title: String,
    pub space_id: String,
    pub model: String,
    pub model_id: String,
    pub backend: BackendTag,
    pub incognito: bool,
    pub buffer: String,
    pub thinking: String,
    pub tool_status: Option<String>,
    pub usage: Option<Usage>,
    pub usage_row_id: Option<i64>,
    pub started: Instant,
    pub thinking_idx: usize,
    pub spinner_color: SpinnerColor,
    pub abort: AbortHandle,
}

State owned by one in-flight chat response. Provider/toolbox values stay in the spawned task; this state is the UI/database-facing projection.

Fields

id: ChatTaskId

session_id: String

session_title: String

space_id: String

model: String

model_id: String

Raw wire model id (backend prefix stripped) — the key for pricing.

backend: BackendTag

Which backend serves this task’s requests.

incognito: bool

buffer: String

thinking: String

tool_status: Option<String>

usage: Option<Usage>

usage_row_id: Option<i64>

Most recent usage_log row for this task; a trailing OpenCode Zen cost event updates it rather than inserting a duplicate.

started: Instant

thinking_idx: usize

spinner_color: SpinnerColor

abort: AbortHandle