{
  "$defs": {
    "AccessTier": {
      "description": "Access tier for tiered pricing, derived from revealed buyer identity.\n\n- ``public``: no identity \u2014 price ranges only\n- ``seat``: authenticated DSP (demand-side platform) seat\n- ``agency``: agency identity revealed\n- ``advertiser``: advertiser identity revealed (best rates)",
      "enum": [
        "public",
        "seat",
        "agency",
        "advertiser"
      ],
      "title": "AccessTier",
      "type": "string"
    },
    "Money": {
      "description": "Exact money amount in integer micros (flagged decision FD-11).\n\n``1_000_000`` micros = 1 currency unit \u2014 the ad-industry convention\n(Google Ad Manager, among others, prices in micros). Float is BANNED on\nthe wire for money: IEEE 754 floating point is non-deterministic for\nmoney math (``0.1 + 0.2 != 0.3``, and repeated CPM \u2014 cost per mille \u2014\narithmetic accumulates error), and the two source repos used ``float``\nend-to-end; that defect must not be fossilized into the spec. Every\nprice, rate, budget, and offer in the shared contract is a ``Money``.\n\n``amount_micros`` is a strict integer: float inputs are rejected at\nvalidation time rather than silently truncated.",
      "properties": {
        "amount_micros": {
          "description": "Amount in micros; 1,000,000 micros = 1 currency unit.",
          "title": "Amount Micros",
          "type": "integer"
        },
        "currency": {
          "default": "USD",
          "description": "ISO 4217 alpha-3 currency code.",
          "pattern": "^[A-Z]{3}$",
          "title": "Currency",
          "type": "string"
        }
      },
      "required": [
        "amount_micros"
      ],
      "title": "Money",
      "type": "object"
    },
    "NegotiationAction": {
      "description": "Action taken in a negotiation round.",
      "enum": [
        "accept",
        "counter",
        "reject",
        "final_offer"
      ],
      "title": "NegotiationAction",
      "type": "string"
    },
    "NegotiationRound": {
      "description": "A single offer/counter round in a negotiation.",
      "properties": {
        "action": {
          "$ref": "#/$defs/NegotiationAction"
        },
        "buyer_price": {
          "$ref": "#/$defs/Money",
          "description": "What the buyer offered this round."
        },
        "concession_pct": {
          "default": 0.0,
          "description": "Seller concession this round (0-1).",
          "title": "Concession Pct",
          "type": "number"
        },
        "cumulative_concession_pct": {
          "default": 0.0,
          "description": "Total seller concession so far (0-1).",
          "title": "Cumulative Concession Pct",
          "type": "number"
        },
        "rationale": {
          "default": "",
          "title": "Rationale",
          "type": "string"
        },
        "round_number": {
          "minimum": 1,
          "title": "Round Number",
          "type": "integer"
        },
        "seller_price": {
          "$ref": "#/$defs/Money",
          "description": "What the seller countered (or accepted at) this round."
        },
        "timestamp": {
          "format": "date-time",
          "title": "Timestamp",
          "type": "string"
        }
      },
      "required": [
        "round_number",
        "buyer_price",
        "seller_price",
        "action"
      ],
      "title": "NegotiationRound",
      "type": "object"
    },
    "NegotiationStatus": {
      "description": "Status of a negotiation (typed; was a raw string in the seller repo).",
      "enum": [
        "active",
        "accepted",
        "rejected",
        "expired"
      ],
      "title": "NegotiationStatus",
      "type": "string"
    }
  },
  "description": "Multi-turn offer history container for a buyer/seller negotiation.\n\nFrom the seller's ``NegotiationHistory``, minus everything that must\nNOT cross the wire: the seller's ``floor_price``, ``base_price``,\nstrategy, and concession limits are seller-internal guardrails and are\ndeliberately absent from the shared schema.\n\nID minting: ``negotiation_id`` is seller-issued.",
  "properties": {
    "buyer_tier": {
      "$ref": "#/$defs/AccessTier",
      "default": "public"
    },
    "completed_at": {
      "anyOf": [
        {
          "format": "date-time",
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "title": "Completed At"
    },
    "negotiation_id": {
      "description": "Seller-issued negotiation identifier.",
      "title": "Negotiation Id",
      "type": "string"
    },
    "package_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Set when negotiating on a package.",
      "title": "Package Id"
    },
    "product_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "title": "Product Id"
    },
    "proposal_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Proposal under negotiation, if proposal-led.",
      "title": "Proposal Id"
    },
    "quote_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Quote under negotiation, if quote-led.",
      "title": "Quote Id"
    },
    "rounds": {
      "items": {
        "$ref": "#/$defs/NegotiationRound"
      },
      "title": "Rounds",
      "type": "array"
    },
    "started_at": {
      "format": "date-time",
      "title": "Started At",
      "type": "string"
    },
    "status": {
      "$ref": "#/$defs/NegotiationStatus",
      "default": "active"
    }
  },
  "required": [
    "negotiation_id"
  ],
  "title": "Negotiation",
  "type": "object"
}