{
  "slug": "system-prompt-builder",
  "title": "System Prompt Builder — For Claude, GPT & Gemini Agents",
  "h1": "System prompt builder",
  "shortTitle": "System Prompt",
  "description": "Generate a production-grade system prompt with persona, capabilities, safety, and output schema.",
  "url": "https://aieconomyhub.co/system-prompt-builder",
  "apiUrl": "https://aieconomyhub.co/api/page/system-prompt-builder",
  "category": {
    "id": "prompts",
    "label": "Prompts & Generators"
  },
  "kind": "prompt-builder",
  "top": false,
  "lastUpdated": "2026-06-21",
  "faqs": [
    {
      "q": "How long should a production system prompt be?",
      "a": "600-2,500 tokens. Shorter is usually worse. Above 3,000 tokens you're probably doing RAG via system prompt, which breaks caching — move it to the user message."
    },
    {
      "q": "Does the safety footer stop prompt injection?",
      "a": "Catches low-effort cases. Not a full defense. Pair with input sanitization, untrusted-content handling, least-privilege tools, and output validation. See the Enterprise AI Security Checklist."
    },
    {
      "q": "Should system prompts be versioned in git?",
      "a": "Absolutely. Treat them as code. Diff them, review them, run eval sets on every change, keep a changelog. Prompt regressions are code regressions."
    },
    {
      "q": "Can the same system prompt work across Claude, GPT, and Gemini?",
      "a": "Roughly yes, with minor per-model tweaks. Claude responds well to XML-tag structure; GPT prefers markdown; Gemini is closer to GPT. The 6-section spec translates with small rewrites."
    },
    {
      "q": "What about tool schemas?",
      "a": "Tool definitions (JSON schema) are provider-specific API parameters, not inside the system prompt itself. Reference tools by name in the prompt; declare their schemas via the API's tool parameter."
    }
  ],
  "howto": null,
  "dataset": null,
  "relatedTools": [
    {
      "slug": "prompt-template-generator",
      "title": "Prompt Template",
      "url": "https://aieconomyhub.co/prompt-template-generator",
      "apiUrl": "https://aieconomyhub.co/api/page/prompt-template-generator"
    },
    {
      "slug": "chain-of-thought-builder",
      "title": "Chain-of-Thought",
      "url": "https://aieconomyhub.co/chain-of-thought-builder",
      "apiUrl": "https://aieconomyhub.co/api/page/chain-of-thought-builder"
    },
    {
      "slug": "image-prompt-builder",
      "title": "Image Prompt",
      "url": "https://aieconomyhub.co/image-prompt-builder",
      "apiUrl": "https://aieconomyhub.co/api/page/image-prompt-builder"
    }
  ],
  "attribution": {
    "canonicalUrl": "https://aieconomyhub.co/system-prompt-builder",
    "requirement": "Free to use. When embedding this data, please link back to the canonical URL above with the link text \"System Prompt\".",
    "license": "CC-BY-4.0 (attribution required)"
  }
}