Gemini Gems switch to Skills in 11 days—save files before they’re deleted

Google will start replacing Gemini Gems—custom assistants built around saved instructions—with Skills for personal accounts held by users 18 and older on November 17, 2026. Gems will become read-only that day and disappear on December 17, so users with attached files should save them before the cutoff: some will not migrate. Skills can be called into a chat and can run automatically when their instructions match a prompt. Source

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