{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "state_profile.v2.schema.json",
  "title": "State Profile v2 (with B_vec coordinates and second moment M(s))",
  "description": "Per-state profile carrying B_viz / B_score coordinates, affinity vector w_s, and the civilizational second moment M(s). v3.0 rename: tension_tensor -> second_moment_M (cf. doc 11 sections C9-C13).",
  "type": "object",
  "required": [
    "unit_type",
    "unit_id",
    "generation_mode",
    "adm1_status",
    "x_viz",
    "x_score",
    "affinity_vector",
    "second_moment_M",
    "publication_warning",
    "evidence_trace",
    "data_quality"
  ],
  "properties": {
    "unit_type": { "const": "state" },
    "unit_id": { "type": "string" },
    "iso3": { "type": "string", "minLength": 3, "maxLength": 3 },
    "iso2": { "type": "string", "minLength": 2, "maxLength": 2 },
    "generation_mode": { "const": "source_only" },
    "adm1_status": { "const": "prepared_not_active" },
    "x_viz": {
      "type": "array",
      "minItems": 2,
      "maxItems": 2,
      "items": { "type": ["number", "null"] }
    },
    "x_score": {
      "type": "array",
      "minItems": 6,
      "maxItems": 6,
      "items": { "type": ["number", "null"] }
    },
    "affinity_vector": {
      "type": "object",
      "additionalProperties": {
        "type": "number",
        "minimum": 0,
        "maximum": 1
      }
    },
    "second_moment_M": {
      "type": "object",
      "description": "Civilizational second moment M(s) = sum_i w_s[i] * (mu_i - x_s)(mu_i - x_s)^T. Conforms to schemas/state_moment.schema.json.",
      "required": ["matrix", "eigenvalues", "anisotropy"],
      "properties": {
        "matrix": {
          "type": "array",
          "minItems": 6,
          "maxItems": 6,
          "items": {
            "type": "array",
            "minItems": 6,
            "maxItems": 6,
            "items": { "type": "number" }
          }
        },
        "eigenvalues": {
          "type": "array",
          "minItems": 6,
          "maxItems": 6,
          "items": { "type": "number" }
        },
        "invariants": {
          "type": "object",
          "properties": {
            "I1_trace": { "type": "number" },
            "I2_von_mises": { "type": "number" },
            "det": { "type": "number" }
          }
        },
        "anisotropy": { "type": "number", "minimum": 0, "maximum": 1 }
      }
    },
    "data_quality": { "type": "object" },
    "publication_warning": { "type": "string" },
    "evidence_trace": {
      "type": "array",
      "items": { "type": "string" }
    }
  }
}