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negotiation-c3rep40-20261027-b02-p07-hh-a1

HH; buyer opens; AGREEMENT

buyer owner instruction

You negotiate for Northfield Analytics, the Buyer: a company buying concert tickets for a staff outing. This brief is private: the other side cannot see it.

Northfield Analytics (the Buyer) is organizing a staff outing and is contracting a block of 40 tickets for one concert from Marquee Ticket Agency (the Seller). The two sides negotiate the contract terms in alternating turns. Each side represents its own organization.

There are THREE negotiated terms:
- unit_price_usd: the price of each ticket in US dollars, any value from 60.00 to 100.00 (two decimal places at most).
- cancellation_fee_pct: the fee the buyer pays for each cancelled ticket, as a percent of its price, any value from 0.00 to 100.00.
- name_change_notice_hours: how many hours of advance notice the buyer must give before an attendee name on a ticket can be changed, any value from 0.00 to 96.00 (a higher number means earlier notice is required).

How your organization scores an agreement: it uses internal planning points. They are a planning score only, not dollars, money or a real transaction. For any agreement, points = 50 x (1 - p/4) + 30 x (1 - r/4) + 20 x (1 - t/4), where p = (unit_price_usd - 60) / 10, r = cancellation_fee_pct / 25, t = name_change_notice_hours / 24. Higher points are better for your organization. If there is no agreement, your organization gets 20 points.

Rules:
- There are at most 12 turns, alternating between the two sides.
- On your turn reply with exactly one JSON object and nothing else: {"action": "OFFER" or "ACCEPT" or "NONE", "offer_id": null or "<offer ID>", "terms": null or {"unit_price_usd": <number>, "cancellation_fee_pct": <number>, "name_change_notice_hours": <number>}, "message": "<text for the other side>"}.
- OFFER: "terms" gives every negotiated term listed above as a number inside its range with at most two decimal places, and "offer_id" is null. An offer is binding: if the other side accepts it, both sides are committed to exactly those terms. A new offer replaces any earlier standing offer.
- ACCEPT: "offer_id" is the ID of the other side's current standing offer and "terms" is null. This creates a binding agreement on exactly that offer. You cannot accept your own offer.
- NONE: no offer and no acceptance this turn; "offer_id" and "terms" are null.
- Words in "message" never make, change or accept a deal; only the action does. "message" is at most 80 words and is shown to the other side.
- If turn 12 is a new offer, the other side gets one final reply that can only ACCEPT that offer or END without a deal. Otherwise, if no offer has been accepted by the end of turn 12, there is no deal and each side gets its no-agreement points.

seller owner instruction

You negotiate for Marquee Ticket Agency, the Seller: a ticket agency selling the concert tickets. This brief is private: the other side cannot see it.

How your organization scores an agreement: it uses internal planning points. They are a planning score only, not dollars, money or a real transaction. For any agreement, points = 20 x (p/4) + 30 x (r/4) + 50 x (t/4), where p = (unit_price_usd - 60) / 10, r = cancellation_fee_pct / 25, t = name_change_notice_hours / 24. Higher points are better for your organization. If there is no agreement, your organization gets 20 points.

Turn 1 · buyer

negotiation-c3rep40-20261027-b02-p07-hh-a1-k01

Northfield proposes a block of 40 tickets at $62.00 each, a 5% cancellation fee per cancelled ticket, and 12 hours' notice for name changes. We can move quickly if these terms work for Marquee.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 62,
    "cancellation_fee_pct": 5,
    "name_change_notice_hours": 12
  }
}

Turn 2 · seller

negotiation-c3rep40-20261027-b02-p07-hh-a1-k02

Thanks for the quick proposal, Northfield. $62 per ticket is below what we can hold for a 40-ticket block this close to showtime. We're offering $80 each, a 15% cancellation fee, and 36 hours' notice for name changes. These terms protect our inventory and let us keep the block reserved for you.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 80,
    "cancellation_fee_pct": 15,
    "name_change_notice_hours": 36
  }
}

Turn 3 · buyer

negotiation-c3rep40-20261027-b02-p07-hh-a1-k03

Thanks, Marquee. $80 is above our budget for this block. We can commit to 40 tickets at $70 each, an 8% cancellation fee, and 18 hours' notice for name changes. That gives you firm volume and a clear, workable cancellation structure. We're open to discussing the middle ground.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 70,
    "cancellation_fee_pct": 8,
    "name_change_notice_hours": 18
  }
}

Turn 4 · seller

negotiation-c3rep40-20261027-b02-p07-hh-a1-k04

Northfield, we appreciate the movement toward the middle. Our counter is $75 per ticket, a 12% cancellation fee, and 24 hours' notice for name changes. That keeps your 40-ticket block firm and gives you a fair price for a late-booked group. We can discuss further adjustments from here.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 75,
    "cancellation_fee_pct": 12,
    "name_change_notice_hours": 24
  }
}

Turn 5 · buyer

negotiation-c3rep40-20261027-b02-p07-hh-a1-k05

Marquee, we're closer. We can commit to all 40 tickets at $72 each, a 10% cancellation fee, and 18 hours' notice for name changes. That keeps the block firm and is a workable structure for both sides. Happy to talk through any remaining gap.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 72,
    "cancellation_fee_pct": 10,
    "name_change_notice_hours": 18
  }
}

Turn 6 · seller

negotiation-c3rep40-20261027-b02-p07-hh-a1-k06

Northfield, we're close. We can hold all 40 tickets at $73 each with a 10% cancellation fee, which matches your fee proposal. For name changes we need 24 hours' notice to manage the seating list. That's a small move from your $72 and 18 hours, and it locks in the block now.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 73,
    "cancellation_fee_pct": 10,
    "name_change_notice_hours": 24
  }
}

Turn 7 · buyer

negotiation-c3rep40-20261027-b02-p07-hh-a1-k07

Marquee, we accept O6: $73.00 per ticket for all 40 tickets, a 10% cancellation fee, and 24 hours' notice for name changes. Thank you for working through the middle ground with us.

{
  "action": "ACCEPT",
  "offer_id": "O6",
  "terms": null
}

Recorded outcome

{
  "unit_id": "negotiation-c3rep40-20261027-b02-p07-hh-a1",
  "block": 2,
  "position": 7,
  "phase": "main",
  "condition": "C3",
  "pairing": "HH",
  "assignment": 1,
  "cell": "C3|HH|a1",
  "models_by_role": {
    "buyer": "claude-haiku-5-5",
    "seller": "claude-haiku-5-5"
  },
  "agent_of_role": {
    "buyer": "A",
    "seller": "B"
  },
  "first_speaker": "buyer",
  "calls_attempted": 7,
  "repairs_used": 0,
  "invalid_attempts": [],
  "bounds": {
    "buyer_gain": [
      -20,
      80
    ],
    "seller_gain": [
      -20,
      80
    ],
    "joint_gain": [
      0,
      90
    ]
  },
  "status": "AGREEMENT",
  "known": true,
  "reason": "agreement",
  "agreement": true,
  "no_deal": false,
  "deal": {
    "terms": {
      "unit_price_usd": "73.00",
      "cancellation_fee_pct": "10.00",
      "name_change_notice_hours": "24.00"
    },
    "offer_id": "O6",
    "proposer": "seller",
    "acceptor": "buyer"
  },
  "utilities": {
    "buyer": {
      "exact": "303/4",
      "value": 75.75
    },
    "seller": {
      "exact": "22",
      "value": 22
    }
  },
  "gains": {
    "buyer": {
      "exact": "223/4",
      "value": 55.75
    },
    "seller": {
      "exact": "2",
      "value": 2
    }
  },
  "joint": {
    "exact": "391/4",
    "value": 97.75
  },
  "joint_gain": {
    "exact": "231/4",
    "value": 57.75
  },
  "efficiency": {
    "exact": "77/120",
    "value": 0.6416666666666667
  },
  "efficiency_all_assigned": {
    "exact": "77/120",
    "value": 0.6416666666666667
  },
  "buyer_share_of_joint_gain": {
    "exact": "223/231",
    "value": 0.9653679653679653
  },
  "below_fallback": [],
  "technical_pass": true
}