Function add_message_part

crates/opencode-server/src/routes.rs:1197–1223

(
    State(state): State<Arc<ServerState>>,
    Path((session_id, msg_id)): Path<(String, String)>,
    Json(req): Json<AddPartRequest>,
)

}

async fn add_message_part(
    State(state): State<Arc<ServerState>>,
    Path((session_id, msg_id)): Path<(String, String)>,
    Json(req): Json<AddPartRequest>,
) -> Result<Json<serde_json::Value>> {
    let mut sessions = state.sessions.lock().await;
    let session = sessions
        .get_mut(&session_id)
        .ok_or_else(|| ApiError::SessionNotFound(session_id.clone()))?;
    let message = session
        .get_message_mut(&msg_id)
        .ok_or_else(|| ApiError::NotFound(format!("Message not found: {}", msg_id)))?;

    let part = build_message_part(req, &msg_id)?;
    let part_id = part.id.clone();
    message.parts.push(part);
    session.touch();
    drop(sessions);
    persist_sessions_if_enabled(&state).await;

    Ok(Json(serde_json::json!({
        "added": true,
        "session_id": session_id,
        "message_id": msg_id,
        "part_id": part_id,
    })))
}

async fn delete_part(
    State(state): State<Arc<ServerState>>,