Gemini Gems will be automatically converted into “skills” on November 17, 2026, with existing custom assistants preserved but moved into a slash-command selection model inside task threads. If you built workflows, docs, onboarding, or shared assistant patterns around Gems, the underlying instructions should survive, but the product surface and invocation path are changing—plan for retraining users and updating any operational guidance tied to Gemini’s custom-assistant UX.