DecisionOpenedevent type

A new decision was opened (Decision lifecycle: Open). Captures initial framing; rationale and evidence accumulate via later events until DecisionDecided.

Full spec

{
  "name": "DecisionOpened",
  "description": "A new decision was opened (Decision lifecycle: Open). Captures initial framing; rationale and evidence accumulate via later events until DecisionDecided.",
  "current_version": 1,
  "actor_type_allowed": [
    "human"
  ],
  "object_type": "Decision",
  "payload_versions": {
    "v1": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "decision_id",
        "title",
        "workstream_id_ref",
        "opened_by",
        "priority_tier"
      ],
      "properties": {
        "decision_id": {
          "type": "string",
          "format": "uuid"
        },
        "title": {
          "type": "string",
          "minLength": 1
        },
        "summary": {
          "type": "string"
        },
        "workstream_id_ref": {
          "type": "string",
          "format": "uuid"
        },
        "linked_question_ids": {
          "type": "array",
          "items": {
            "type": "string",
            "format": "uuid"
          },
          "default": []
        },
        "depends_on_decision_ids": {
          "type": "array",
          "items": {
            "type": "string",
            "format": "uuid"
          },
          "default": []
        },
        "blocks_decision_ids": {
          "type": "array",
          "items": {
            "type": "string",
            "format": "uuid"
          },
          "default": []
        },
        "priority_tier": {
          "type": "string",
          "enum": [
            "P0",
            "P1",
            "P2",
            "P3"
          ]
        },
        "opened_by": {
          "type": "string",
          "format": "uuid"
        },
        "approval_chain_step_count": {
          "type": "integer",
          "minimum": 1,
          "default": 1,
          "description": "Q2: total ordered approval steps required between In Review and Decided."
        }
      }
    }
  },
  "projections_consuming": [
    "decisions_view",
    "blast_radius_view",
    "audit_log"
  ],
  "canonicalizer_module": "event-canonicalizers/decision_opened.ts"
}