* Helper function to handle OAuth errors with provider-specific messages. * Returns true if error was handled, false otherwise.

* Helper function that contains the shared post-profile OAuth logic * (supports OAuth 1.0a and OAuth 2.0 providers). * Returns User (new or updated)

* Helper: Send SSE event to client * @param {Object} res - Express response object * @param {string} eventType - Type of SSE event (chat, status, ra

* Initialize MongoDB checkpointer for persistent sessions. * * Session cleanup strategy: * - Authenticated users: Data cleaned up on account deleti

* Common function to handle OAuth2 token processing and saving user data. * * This function is to handle various scenarios that we would run into wh

* Initialize the MongoDB collection for RAG

* Configure or update the vector index dimensions based on our embedding results * Do this only once. If you change your embedding model to a differe

* Helper to send a 2FA code email. * The success flash message is customizable so callers can distinguish * between first send and resend.

* Helper function to update or set a vector index in MongoDB Atlas with a new index definition

* Create the Customer Service Agent using createAgent with built-in middleware

* Helper: Extract AI chat messages from model_request node

* Helper: Extract status from graph node updates

* Helper to send a passwordless login link if a user is trying to create an account * but we already have an account for that email address. * This

* Helper to send a passwordless signup link for new users.

* Create a minimal PDF file with ExampleCorp test data * * Note: This minimal PDF structure will trigger a "Warning: Indexing all PDF objects" * me

* Removes all valid sessions for a given user * @param {string} userId * @returns {Promise}