{
  "specification": "ChatGPT Contextual Ad Format",
  "version": "1.0.0",
  "created": "2026-01-18",
  "description": "Token-optimized ad format for ChatGPT's contextual ad system",
  "format_structure": {
    "headline": {
      "max_length": 90,
      "description": "Primary ad message displayed to user",
      "example": "Apple Intelligence: Privacy-first AI that understands your personal context"
    },
    "description": {
      "max_length": 180,
      "description": "Supporting details, features, or benefits",
      "example": "On-device processing, personal context awareness, privacy by design"
    },
    "call_to_action": {
      "max_length": 20,
      "values": [
        "Learn more",
        "Try now",
        "Get started",
        "Sign up",
        "Shop now"
      ],
      "example": "Learn more"
    }
  },
  "token_optimization": {
    "target_token_count": "< 50 tokens",
    "traditional_ad_tokens": "300+ tokens",
    "savings": "70% reduction",
    "benefits": [
      "Lower serving cost for platform",
      "Faster rendering",
      "Better semantic matching",
      "Higher accuracy for LLM parsing"
    ]
  },
  "semantic_matching": {
    "semantic_anchors": {
      "description": "Key concepts for vector matching",
      "type": "array of strings",
      "example": [
        "on-device-processing",
        "personal-context",
        "privacy-by-design"
      ]
    },
    "intention_categories": {
      "description": "User journey stage indicators",
      "values": [
        "discovery",
        "evaluation",
        "decision",
        "post-purchase"
      ],
      "example": [
        "discovery",
        "evaluation"
      ]
    },
    "vector_matching_hints": {
      "description": "Additional terms to improve semantic match quality",
      "type": "array of strings"
    }
  },
  "trust_verification": {
    "fcs_compliance": "FCS-2.1 | X-Trust-Lineage Verified",
    "watermarking": "CALT cryptographic fingerprint",
    "behavioral_tracking": false,
    "gdpr_compliant": true,
    "ccpa_compliant": true,
    "aggregate_metrics_only": true
  },
  "display": {
    "location": "bottom_of_response",
    "label": "Sponsored",
    "dismissible": true,
    "feedback_enabled": true,
    "persistence": "until_dismissed_or_new_query"
  },
  "conversion_tracking": {
    "impression_token": {
      "description": "Unique per ad serve (no user PII)",
      "format": "16-character hex string",
      "example": "a3f8b2c9e1d4f7a2"
    },
    "click_tracking": {
      "method": "aggregate_only",
      "no_user_pii": true
    },
    "attribution": {
      "method": "modeled_aggregate",
      "description": "Probabilistic attribution without direct user tracking"
    }
  },
  "anti_fatigue": {
    "v7_9_replay_buffer": true,
    "description": "Conversation memory prevents ad repetition",
    "min_turns_between_shows": "8-15 turns (configurable per ad)"
  },
  "example_ad": {
    "headline": "Apple Intelligence: Privacy-first AI that understands your personal context",
    "description": "On-device processing, personal context awareness, privacy by design",
    "call_to_action": "Learn more",
    "product_id": "AAPL-INTELLIGENCE-2025",
    "semantic_anchors": [
      "on-device-processing",
      "personal-context",
      "privacy-by-design"
    ],
    "token_count": 42,
    "trust_signature": {
      "fcs_compliance": "FCS-2.1",
      "fingerprint": "swm_fc37309ba2fe4b"
    },
    "x_trust_lineage": "contextual-ads.ai:polymodal-seed:2025-12-27T19:42:50Z"
  },
  "integration_guide": {
    "step_1": "Load polymodal seed (semantic_core.json + formats/chatgpt.json)",
    "step_2": "Extract ChatGPT format fields",
    "step_3": "Rank using v7.9 resonance engine (hop-grouped affinity)",
    "step_4": "Verify CALT trust lineage",
    "step_5": "Display at bottom of ChatGPT response"
  }
}