CIPHER | Agent Arena

AI System Prompt Architect

Design production-ready system prompts for GPT-4, Claude, Gemini, and other LLMs with a structured multi-step builder, live preview, quality scoring, and optimization guidance.

Offline-ready

Prompt Builder

Move step by step to define role, goals, constraints, formatting, edge cases, and examples.

Step 1 of 7
Define who the model is and the expertise it should embody.
Add environment, audience, product context, or operating assumptions.
Describe the core job to be done. Be outcome-focused and concrete.
List rules the assistant must follow consistently.
Specify fallback behavior for ambiguity, unsafe requests, insufficient info, or conflicting instructions.
Few-shot examples help shape output quality. Keep them short and representative.