{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "v": {
      "type": "number",
      "const": 1,
      "description": "Protocol major version."
    },
    "type": {
      "type": "string",
      "const": "person.face_set"
    },
    "id": {
      "type": "string",
      "pattern": "^evt_[0-7][0-9A-HJKMNP-TV-Z]{25}$",
      "description": "The event's own id. Stable across a retry of the same event."
    },
    "ts": {
      "type": "string",
      "format": "date-time",
      "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d:[0-5]\\d(?:\\.\\d+)?(?:Z|([+-](?:[01]\\d|2[0-3]):[0-5]\\d)))$",
      "description": "When it happened, by Chips' clock. Stamped on the way in; a value the sender writes is replaced."
    },
    "workspace_id": {
      "type": "string",
      "pattern": "^ws_[0-7][0-9A-HJKMNP-TV-Z]{25}$",
      "description": "A workspace identifier: `ws_` followed by a ULID."
    },
    "space_id": {
      "description": "The space, when the event belongs to one.",
      "type": "string",
      "pattern": "^spc_[0-7][0-9A-HJKMNP-TV-Z]{25}$"
    },
    "run_id": {
      "description": "The run, when the event belongs to one.",
      "type": "string",
      "pattern": "^run_[0-7][0-9A-HJKMNP-TV-Z]{25}$"
    },
    "seq": {
      "description": "Assigned by the server on append, monotonic per workspace. Absent on the way in.",
      "type": "integer",
      "exclusiveMinimum": 0,
      "maximum": 9007199254740991
    },
    "idempotency_key": {
      "description": "Required on every client-originated write. Sending the same key twice is a no-op.",
      "type": "string",
      "minLength": 1,
      "maxLength": 200
    },
    "actor": {
      "type": "object",
      "properties": {
        "kind": {
          "type": "string",
          "enum": [
            "person",
            "harness",
            "agent",
            "system"
          ],
          "description": "Whether a person, a harness, one of a harness's agents or Chips itself acted."
        },
        "id": {
          "type": "string",
          "minLength": 1,
          "description": "The participant id, or `system` for Chips."
        },
        "harness_id": {
          "description": "For an agent: the harness it speaks through, whose budget and runs are the agent's (ADR 0087). Filled in by Chips.",
          "type": "string",
          "pattern": "^hrn_[0-7][0-9A-HJKMNP-TV-Z]{25}$"
        }
      },
      "required": [
        "kind",
        "id"
      ],
      "description": "The participant an event is attributed to."
    },
    "participant_id": {
      "type": "string",
      "pattern": "^usr_[0-7][0-9A-HJKMNP-TV-Z]{25}$",
      "description": "Who: a person chooses only their own face."
    },
    "face": {
      "anyOf": [
        {
          "type": "object",
          "properties": {
            "icon": {
              "type": "string",
              "maxLength": 40,
              "pattern": "^[a-zA-Z]*$"
            },
            "ground": {
              "type": "integer",
              "minimum": 0,
              "maximum": 26
            },
            "letters": {
              "description": "One or two letters, or an emoji or two, the face wears on its ground in place of a mark (ADR 0139); the mark is empty beside them. Absent on a face that is a mark, or only a colour.",
              "type": "string",
              "minLength": 1,
              "maxLength": 32
            }
          },
          "required": [
            "icon",
            "ground"
          ]
        },
        {
          "type": "null"
        }
      ],
      "description": "The face they chose: a mark from Chips' library or one or two letters, on the index of a ground. `null` when they took it back and wear their initials again."
    }
  },
  "required": [
    "v",
    "type",
    "id",
    "ts",
    "workspace_id",
    "actor",
    "participant_id",
    "face"
  ],
  "description": "A person chose the face they wear beside their name, or went back to their initials. Not sent to a harness.",
  "$id": "https://chipschat.ai/schema/v1/person.face_set.json",
  "title": "PersonFaceSet"
}