{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://cdsl.local/schema/cad.generation-spec.v1",
  "title": "CDSL GenerationSpec",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "schema": {"const": "cad.generation-spec.v1"},
    "schema_version": {"const": "1.0"},
    "mode": {"enum": ["create", "revise"]},
    "base_revision_id": {"type": "string"},
    "patch_intent": {"type": "string"},
    "part": {"$ref": "#/$defs/part"},
    "parameters": {"type": "object", "additionalProperties": {"$ref": "#/$defs/parameter"}},
    "features": {"type": "array", "items": {"$ref": "#/$defs/feature"}},
    "constraints": {"type": "array", "items": {"$ref": "#/$defs/constraint"}},
    "acceptance": {"type": "array", "items": {"$ref": "#/$defs/acceptance"}},
    "assumptions": {"type": "array", "items": {"type": "string", "minLength": 1}},
    "approximations": {"type": "array", "items": {"$ref": "#/$defs/approximation"}},
    "references": {"type": "array", "items": {"type": "object"}}
  },
  "required": ["schema", "schema_version", "mode", "base_revision_id", "part", "parameters", "features", "constraints", "acceptance", "assumptions", "approximations", "references"],
  "$defs": {
    "part": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "family": {"type": "string", "minLength": 1},
        "name": {"type": "string", "minLength": 1},
        "units": {"const": "mm"},
        "coordinate_system": {"type": "string", "minLength": 1}
      },
      "required": ["family", "name", "units", "coordinate_system"]
    },
    "parameter": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "value": {},
        "unit": {"enum": ["mm", "deg", "rad", "count", ""]},
        "source": {"enum": ["user", "technical_drawing", "image_estimate", "template_default", "derived_standard", "assumption"]},
        "confidence": {"type": "number", "minimum": 0, "maximum": 1},
        "locked": {"type": "boolean"},
        "assumption": {"type": "string"}
      },
      "required": ["value", "unit", "source", "confidence", "locked", "assumption"]
    },
    "feature": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "id": {"type": "string", "pattern": "^[A-Za-z0-9_-]{1,80}$"},
        "kind": {"type": "string", "minLength": 1},
        "depends_on": {"type": "array", "items": {"type": "string", "pattern": "^[A-Za-z0-9_-]{1,80}$"}},
        "parameters": {"type": "object"},
        "semantic_role": {"type": "string"}
      },
      "required": ["id", "kind", "depends_on", "parameters"]
    },
    "constraint": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "type": {"enum": ["less_than", "less_equal", "greater_than", "greater_equal", "equal", "inside_boundary", "symmetric", "same_axis", "distance", "count"]},
        "left": {"type": "string"},
        "right": {"type": "string"},
        "value": {},
        "feature": {"type": "string"},
        "margin": {"type": "number"},
        "ratio": {"type": "number"},
        "message": {"type": "string"}
      },
      "required": ["type"]
    },
    "acceptance": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "id": {"type": "string", "pattern": "^[A-Za-z0-9_-]{1,80}$"},
        "type": {"enum": ["bbox", "solid_count", "feature_count", "hole_diameter", "hole_center", "hole_spacing", "wall_thickness", "overall_length", "overall_diameter", "coaxiality", "symmetry", "through_condition", "blind_depth"]},
        "feature": {"type": "string"},
        "expected": {},
        "tolerance": {"type": "number", "minimum": 0},
        "severity": {"enum": ["blocking", "warning", "informational"]}
      },
      "required": ["id", "type", "expected", "tolerance", "severity"]
    },
    "approximation": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "request": {"type": "string", "minLength": 1},
        "status": {"enum": ["approximated", "expanded", "omitted", "blocked"]},
        "translation": {"type": "string", "minLength": 1},
        "reason": {"type": "string", "minLength": 1}
      },
      "required": ["request", "status", "translation", "reason"]
    }
  }
}