Struct AppState 

pub struct AppState {
    pub config: Config,
    pub messages: Vec<Message>,
    pub is_query_active: bool,
    pub total_usage: Usage,
    pub total_cost_usd: f64,
    pub turn_count: usize,
    pub cwd: String,
    pub model_usage: HashMap<String, Usage>,
    pub plan_mode: bool,
    pub task_manager: Arc<TaskManager>,
    pub session_id: String,
}

Global application state for the session.

Tracks the conversation history, token usage, cost, model config, and per-model breakdowns. Mutated by the query engine during turns and read by commands like /cost, /status, /stats.

Fields

config: Config

Configuration snapshot.

messages: Vec<Message>

Full conversation history.

is_query_active: bool

Whether a query is currently in progress.

total_usage: Usage

Accumulated token usage across all turns.

total_cost_usd: f64

Total estimated cost in USD.

turn_count: usize

Number of agent turns completed.

cwd: String

Current working directory.

model_usage: HashMap<String, Usage>

Per-model token usage.

plan_mode: bool

Whether plan mode is active (read-only tools only).

task_manager: Arc<TaskManager>

Shared background task manager.

session_id: String

Session ID for persistence.

Implementations

impl AppState

pub fn new(config: Config) -> Self

pub fn record_usage(&mut self, usage: &Usage, model: &str)

Record usage from a completed API call.

pub fn push_message(&mut self, msg: Message)

Push a message into the conversation history.

pub fn history(&self) -> &[Message]

Get the conversation history.