{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://app.vendorbenchmark.com/agent-protocol/schemas/offer.schema.json",
  "title": "ANP v0.1 offer / counter-offer",
  "type": "object",
  "additionalProperties": false,
  "required": ["currency", "term_months", "expires_at", "line_items"],
  "properties": {
    "currency": { "type": "string", "pattern": "^[A-Z]{3}$" },
    "term_months": { "type": "integer", "minimum": 1, "maximum": 120 },
    "expires_at": { "type": "string", "format": "date-time" },
    "line_items": {
      "type": "array",
      "minItems": 1,
      "maxItems": 200,
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": ["description", "quantity", "unit", "unit_price", "currency"],
        "properties": {
          "sku": { "type": "string", "maxLength": 80 },
          "description": { "type": "string", "minLength": 1, "maxLength": 300 },
          "quantity": { "type": "number", "exclusiveMinimum": 0, "maximum": 10000000 },
          "unit": { "type": "string", "minLength": 1, "maxLength": 40 },
          "unit_price": { "type": "number", "minimum": 0, "maximum": 1000000000 },
          "currency": { "type": "string", "pattern": "^[A-Z]{3}$" },
          "term_months": { "type": "integer", "minimum": 1, "maximum": 120 }
        }
      }
    },
    "total_annual": { "type": "number", "minimum": 0 },
    "conditions": {
      "type": "array",
      "maxItems": 20,
      "items": { "type": "string", "minLength": 1, "maxLength": 500 }
    },
    "notes": { "type": "string", "maxLength": 4000 }
  }
}