Worked on the RasaHQ/rasa-calm-demo repository to deliver a feature upgrade focused on persistent slot configuration for chatbot flows using Rasa Pro 3.11.2. The approach involved upgrading the Rasa Pro version, introducing the persist_slots mechanism to stabilize session data, and refactoring the verify_account flow to leverage this new persistence method instead of the previous reset_after_flow_ends logic. End-to-end tests were updated in Python and YAML to validate the new behavior across conversation scenarios, and model group configurations were adjusted to align with the persistent slot approach. The work concentrated on feature delivery and robust validation without major bug fixes.