{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://adcontextprotocol.org/schemas/3.3.0-beta.1/media-buy/list-proposals-response.json",
  "title": "List Proposals Response",
  "x-status": "experimental",
  "x-added-in": "3.3.0",
  "description": "One page of proposals for the requested account with their seller-tracked dispositions, plus the current state of every opportunity those proposals belong to. Each snapshot is returned byte-for-byte as issued, so terms_digest still verifies; lifecycle state lives beside it, never inside it. Experimental (media_buy.open_opportunities).",
  "type": "object",
  "properties": {
    "outcome": {
      "type": "string",
      "const": "listed"
    },
    "proposals": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "proposal": {
            "$ref": "https://adcontextprotocol.org/schemas/3.3.0-beta.1/core/canonical-proposal.json",
            "description": "The immutable snapshot exactly as the seller issued it."
          },
          "disposition": {
            "$ref": "https://adcontextprotocol.org/schemas/3.3.0-beta.1/enums/proposal-disposition.json"
          },
          "disposition_changed_at": {
            "type": "string",
            "format": "date-time",
            "description": "When the seller recorded the current disposition. Equals the issue time for an available snapshot."
          },
          "origin": {
            "type": "string",
            "enum": [
              "request",
              "refinement",
              "later",
              "seller_offer"
            ],
            "description": "How the snapshot was created: in a request_proposals response, by refine_proposals, by the seller after the creating task completed under later_proposals consent, or by the seller as an offer against an accepted media buy (media_buy.seller_offers, distinct from later proposals). Always seller_offer for a snapshot with proposal_initiator seller."
          },
          "later_reason": {
            "$ref": "https://adcontextprotocol.org/schemas/3.3.0-beta.1/enums/later-proposal-reason.json"
          }
        },
        "required": [
          "proposal",
          "disposition",
          "disposition_changed_at",
          "origin"
        ],
        "if": {
          "properties": {
            "origin": {
              "const": "later"
            }
          },
          "required": [
            "origin"
          ]
        },
        "then": {
          "required": [
            "later_reason"
          ],
          "properties": {
            "proposal": {
              "properties": {
                "proposal_status": {
                  "const": "draft"
                },
                "proposal_kind": {
                  "const": "new_media_buy"
                }
              },
              "required": [
                "opportunity_id",
                "expires_at"
              ]
            }
          }
        },
        "else": {
          "not": {
            "required": [
              "later_reason"
            ]
          }
        },
        "allOf": [
          {
            "if": {
              "properties": {
                "origin": {
                  "const": "seller_offer"
                }
              },
              "required": [
                "origin"
              ]
            },
            "then": {
              "properties": {
                "proposal": {
                  "properties": {
                    "proposal_initiator": {
                      "const": "seller"
                    },
                    "proposal_kind": {
                      "enum": [
                        "media_buy_update",
                        "media_buy_cancellation"
                      ]
                    },
                    "proposal_status": {
                      "enum": [
                        "committed",
                        "accepted"
                      ]
                    }
                  },
                  "required": [
                    "proposal_initiator"
                  ]
                }
              }
            },
            "else": {
              "properties": {
                "proposal": {
                  "properties": {
                    "proposal_initiator": {
                      "not": {
                        "const": "seller"
                      }
                    }
                  }
                }
              }
            }
          }
        ],
        "additionalProperties": false
      }
    },
    "opportunities": {
      "type": "array",
      "description": "Current state of each opportunity referenced by a returned proposal or named in opportunity_ids. One entry per opportunity_id; unknown or inaccessible opportunity IDs are omitted, not errors.",
      "items": {
        "type": "object",
        "properties": {
          "opportunity_id": {
            "type": "string",
            "minLength": 1,
            "maxLength": 255,
            "pattern": "^[A-Za-z0-9_.:-]{1,255}$",
            "x-entity": "opportunity"
          },
          "status": {
            "type": "string",
            "enum": [
              "open",
              "closed"
            ]
          },
          "close_reason": {
            "type": "string",
            "enum": [
              "accepted_with_seller",
              "purchased_elsewhere",
              "selected_alternative",
              "not_pursued",
              "budget_changed",
              "timing_changed",
              "other"
            ]
          },
          "later_proposals": {
            "$ref": "https://adcontextprotocol.org/schemas/3.3.0-beta.1/core/later-proposals-state.json"
          }
        },
        "required": [
          "opportunity_id",
          "status"
        ],
        "if": {
          "properties": {
            "status": {
              "const": "closed"
            }
          },
          "required": [
            "status"
          ]
        },
        "then": {
          "required": [
            "close_reason"
          ]
        },
        "else": {
          "not": {
            "required": [
              "close_reason"
            ]
          }
        },
        "additionalProperties": false
      }
    },
    "next_cursor": {
      "type": "string",
      "minLength": 1
    },
    "replayed": {
      "type": "boolean",
      "const": true
    },
    "context": {
      "$ref": "https://adcontextprotocol.org/schemas/3.3.0-beta.1/core/context.json"
    },
    "ext": {
      "$ref": "https://adcontextprotocol.org/schemas/3.3.0-beta.1/core/ext.json"
    }
  },
  "required": [
    "outcome",
    "proposals",
    "opportunities"
  ],
  "additionalProperties": false
}