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Gemini Custom Instructions Four Pillars Framework
design.dev April 23, 2026
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Framework for creating effective Gemini Gems using four key dimensions: Persona (who the Gem pretends to be), Tone (formal/casual/technical), Expertise (domain knowledge), and Output Format (bullet points, tables, code).
Rule Content
The Four Pillars Framework for Gemini system instructions: 1) Persona - define who the AI should act as, 2) Tone - specify formal, casual, technical, or friendly, 3) Expertise - niche domain knowledge and specializations, 4) Output Format - bullet points, paragraphs, code, tables, plus Constraints for what to avoid or always include.
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