{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "dd-flow/mb-upgrade-migration-report@1",
  "title": "mb-upgrade runtime/home migration report",
  "type": "object",
  "additionalProperties": true,
  "required": [
    "ok",
    "schema_id",
    "generated_at",
    "project",
    "migration",
    "backup",
    "active_state",
    "primary_data",
    "derived_artifacts",
    "verification"
  ],
  "properties": {
    "ok": { "const": true },
    "schema_id": { "const": "dd-flow/mb-upgrade-migration-report@1" },
    "generated_at": { "type": "string", "minLength": 1 },
    "project": {
      "type": "object",
      "required": ["id", "root", "memory_bank_version"],
      "additionalProperties": true,
      "properties": {
        "id": { "type": "string", "minLength": 1 },
        "root": { "type": "string", "minLength": 1 },
        "memory_bank_version": { "type": ["string", "null"] }
      }
    },
    "migration": {
      "type": "object",
      "required": [
        "mode",
        "status",
        "source_memory_bank_version",
        "target_memory_bank_version",
        "adjacent_only",
        "chain",
        "blocked_reasons"
      ],
      "additionalProperties": true,
      "properties": {
        "mode": { "const": "mb-upgrade-only" },
        "status": { "enum": ["ready", "blocked", "noop", "completed", "failed", "degraded"] },
        "source_memory_bank_version": { "type": "string", "minLength": 1 },
        "target_memory_bank_version": { "type": "string", "minLength": 1 },
        "adjacent_only": { "const": true },
        "chain": {
          "type": "array",
          "items": {
            "type": "object",
            "required": ["id", "from", "to", "status"],
            "additionalProperties": true,
            "properties": {
              "id": { "type": "string", "minLength": 1 },
              "from": { "type": "string", "minLength": 1 },
              "to": { "type": "string", "minLength": 1 },
              "status": { "enum": ["planned", "applied", "skipped", "failed", "blocked"] }
            }
          }
        },
        "blocked_reasons": {
          "type": "array",
          "items": { "type": "string", "minLength": 1 }
        }
      }
    },
    "backup": {
      "type": "object",
      "required": ["status", "path", "created_at", "rollback_route", "size_bytes", "sha256"],
      "additionalProperties": true,
      "properties": {
        "status": { "enum": ["present", "planned", "missing"] },
        "path": { "type": ["string", "null"] },
        "created_at": { "type": ["string", "null"] },
        "size_bytes": { "type": ["integer", "null"], "minimum": 1 },
        "sha256": { "type": ["string", "null"], "pattern": "^[a-f0-9]{64}$" },
        "rollback_route": { "type": "string", "minLength": 1 }
      }
    },
    "active_state": { "type": "object", "additionalProperties": true },
    "primary_data": {
      "type": "array",
      "items": { "type": "string", "minLength": 1 }
    },
    "derived_artifacts": {
      "type": "array",
      "items": { "type": "string", "minLength": 1 }
    },
    "verification": { "type": "object", "additionalProperties": true }
  }
}