{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "urn:orbiplex:schema:procurement-offer:v1",
  "title": "ProcurementOffer v1",
  "description": "Machine-readable schema for responder offers attached to a published procurement-capable question.",
  "type": "object",
  "additionalProperties": true,
  "x-dia-workflow": "project",
  "x-dia-status": "draft",
  "x-dia-basis": [
    "doc/project/30-stories/story-001.md",
    "doc/project/30-stories/story-004.md",
    "doc/project/50-requirements/requirements-001.md",
    "doc/project/40-proposals/011-federated-answer-procurement-lifecycle.md"
  ],
  "required": [
    "schema/v",
    "offer/id",
    "question/id",
    "created-at",
    "responder/node-id",
    "responder/participant-id",
    "price/amount",
    "price/currency",
    "deadline-at",
    "answer/min-length",
    "answer/max-length",
    "execution/mode",
    "specialization/tags",
    "reputation/evidence"
  ],
  "properties": {
    "schema/v": { "const": 1, "description": "Schema version." },
    "offer/id": {
      "type": "string",
      "minLength": 1,
      "description": "Stable identifier of the offer instance."
    },
    "question/id": {
      "type": "string",
      "minLength": 1,
      "description": "Question lifecycle identifier to which the offer responds."
    },
    "created-at": {
      "type": "string",
      "format": "date-time",
      "description": "Offer creation timestamp."
    },
    "expires-at": {
      "type": "string",
      "format": "date-time",
      "description": "Optional offer-expiry timestamp before which the asker must decide."
    },
    "responder/node-id": {
      "type": "string",
      "minLength": 1,
      "description": "Responding node that would host, route, or execute the answer path."
    },
    "responder/participant-id": {
      "type": "string",
      "minLength": 1,
      "description": "Participation-role identity that stands behind the offer and would own the responder-side participation semantics."
    },
    "responder/federation-id": {
      "type": "string",
      "minLength": 1,
      "description": "Federation identity of the responder when relevant to routing or trust."
    },
    "responder/public-key-ref": {
      "type": "string",
      "minLength": 1,
      "description": "Reference to the responder's encryption or signature key material."
    },
    "price/amount": {
      "type": "integer",
      "minimum": 0,
      "description": "Proposed price in minor units. When `price/currency = ORC`, the value uses ORC minor units with fixed scale `2`."
    },
    "price/currency": {
      "type": "string",
      "minLength": 2,
      "maxLength": 16,
      "description": "Currency or settlement unit symbol for the proposed price."
    },
    "deadline-at": {
      "type": "string",
      "format": "date-time",
      "description": "Latest timestamp by which the responder expects to deliver or conclude."
    },
    "answer/min-length": {
      "type": "integer",
      "minimum": 1,
      "description": "Lower answer-length bound the responder is willing to contract against."
    },
    "answer/max-length": {
      "type": "integer",
      "minimum": 1,
      "description": "Upper answer-length bound the responder is willing to contract against."
    },
    "answer/format": {
      "type": "string",
      "enum": ["plain-text", "markdown", "json", "edn", "mixed"],
      "description": "Preferred answer representation."
    },
    "execution/mode": {
      "type": "string",
      "enum": ["room-collaboration", "single-responder"],
      "description": "Whether the responder expects collaborative discussion or a narrowed single-responder path."
    },
    "specialization/tags": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "string",
        "minLength": 1
      },
      "description": "Tags used to justify topical fit of the offer."
    },
    "models/used": {
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 1
      },
      "description": "Models or capability labels the responder expects to use."
    },
    "operator-participation/may-occur": {
      "type": "boolean",
      "description": "Whether the responder expects possible operator consultation or live human presence under allowed room policy."
    },
    "confirmation/mode": {
      "type": "string",
      "enum": ["arbiter-confirmed", "self-confirmed", "manual-review-only"],
      "description": "Confirmation model proposed by the responder for later contract formation."
    },
    "reputation/evidence": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "required": ["kind", "ref"],
        "properties": {
          "kind": {
            "type": "string",
            "minLength": 1
          },
          "ref": {
            "type": "string",
            "minLength": 1
          },
          "score": {
            "type": "number",
            "minimum": 0,
            "maximum": 1
          }
        },
        "additionalProperties": true
      },
      "description": "Evidence references advertised to justify responder trust."
    },
    "policy_annotations": {
      "type": "object",
      "additionalProperties": true
    }
  },
  "allOf": [
    {
      "if": {
        "required": ["answer/min-length", "answer/max-length"]
      },
      "then": {
        "properties": {
          "answer/max-length": {
            "minimum": 1
          }
        }
      }
    }
  ]
}