Struct ReplState 

pub struct ReplState<'a> {
    pub mode: &'a mut ReplMode,
    pub sess: &'a mut Session,
    pub ctx: &'a mut AgentContext,
    pub history: &'a mut InputHistory,
    pub conversation_messages: &'a mut Vec<Message>,
    pub act_messages: &'a mut Vec<Message>,
    pub coder_system_prompt: &'a str,
    pub session_id: &'a str,
    pub session_tracker: &'a SessionTracker,
    pub last_user_message: &'a mut Option<String>,
}

Mutable REPL state passed to handle_command to keep the argument count low. For Rust learners: grouping related mutable references into a struct is a common pattern to avoid “too many arguments” and to keep function signatures readable and easy to extend.

Fields

mode: &'a mut ReplMode

sess: &'a mut Session

ctx: &'a mut AgentContext

history: &'a mut InputHistory

The input history owned by the REPL main loop. Passed here so /session etc can call history.push() if needed.

conversation_messages: &'a mut Vec<Message>

act_messages: &'a mut Vec<Message>

coder_system_prompt: &'a str

session_id: &'a str

Used by /undo to persist and pop stash entries across runs.

session_tracker: &'a SessionTracker

Session-level token tracker (accumulates across multiple task runs). Passed by reference so /tokens can display cumulative stats.

last_user_message: &'a mut Option<String>

Last user message — used by /redo to re-send.