{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://cezentech.com/schemas/nexus-one/artifact-manifest-v1.json",
  "title": "Nexus One AI Signed Artifact Manifest",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "schema", "artifact", "source", "targets", "payload", "requirements",
    "lifecycle", "integrity"
  ],
  "properties": {
    "schema": { "const": "com.cezen.nexus-one.artifact-manifest.v1" },
    "artifact": {
      "type": "object",
      "additionalProperties": false,
      "required": ["id", "type", "version", "created_at", "architecture"],
      "properties": {
        "id": { "type": "string", "pattern": "^[a-z0-9][a-z0-9._-]{2,127}$" },
        "type": { "enum": ["iso-payload", "model-pack", "update-bundle", "trust-bundle"] },
        "version": { "type": "string", "minLength": 1 },
        "created_at": { "type": "string", "format": "date-time" },
        "architecture": { "enum": ["amd64", "arm64", "multi"] },
        "description": { "type": "string", "maxLength": 512 }
      }
    },
    "source": {
      "type": "object",
      "additionalProperties": false,
      "required": ["repository", "revision", "builder", "build_recipe_digest"],
      "properties": {
        "repository": { "type": "string", "minLength": 1 },
        "revision": { "type": "string", "pattern": "^[0-9a-f]{40,64}$" },
        "builder": { "type": "string", "minLength": 1 },
        "build_recipe_digest": { "$ref": "#/$defs/digest" },
        "sbom": { "$ref": "#/$defs/objectRef" },
        "provenance": { "$ref": "#/$defs/objectRef" }
      }
    },
    "targets": {
      "type": "object",
      "additionalProperties": false,
      "required": ["categories", "tiers", "platform_versions", "ubuntu_release"],
      "properties": {
        "categories": {
          "type": "array", "minItems": 1, "uniqueItems": true,
          "items": { "enum": ["workstation", "server"] }
        },
        "tiers": {
          "type": "array", "minItems": 1, "uniqueItems": true,
          "items": { "enum": ["workstation", "starter", "basic", "pro", "max"] }
        },
        "platform_versions": { "type": "string", "minLength": 1 },
        "ubuntu_release": { "type": "string", "minLength": 1 },
        "hardware_profiles": {
          "type": "array", "uniqueItems": true, "items": { "type": "string", "minLength": 1 }
        }
      }
    },
    "payload": {
      "type": "array", "minItems": 1,
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": ["path", "bytes", "digest", "media_type", "install_scope"],
        "properties": {
          "path": { "type": "string", "pattern": "^[^/].*$" },
          "bytes": { "type": "integer", "minimum": 0 },
          "digest": { "$ref": "#/$defs/digest" },
          "media_type": { "type": "string", "minLength": 1 },
          "install_scope": { "enum": ["base", "category", "tier", "optional"] },
          "immutable_source": { "type": "string" }
        }
      }
    },
    "requirements": {
      "type": "object",
      "additionalProperties": false,
      "required": ["download_bytes", "unpacked_bytes", "required_free_bytes"],
      "properties": {
        "download_bytes": { "type": "integer", "minimum": 0 },
        "unpacked_bytes": { "type": "integer", "minimum": 0 },
        "required_free_bytes": { "type": "integer", "minimum": 0 },
        "minimum_ram_bytes": { "type": "integer", "minimum": 0 },
        "minimum_vram_bytes": { "type": "integer", "minimum": 0 },
        "required_capabilities": {
          "type": "array", "uniqueItems": true, "items": { "type": "string", "minLength": 1 }
        }
      }
    },
    "lifecycle": {
      "type": "object",
      "additionalProperties": false,
      "required": ["activation", "reboot", "rollback_class"],
      "properties": {
        "from_versions": { "type": "string" },
        "to_version": { "type": "string" },
        "activation": { "enum": ["install", "import", "staged-switch", "trust-update"] },
        "reboot": { "enum": ["none", "may-require", "required"] },
        "rollback_class": { "enum": ["automatic", "operator", "restore", "none"] },
        "security_floor": { "type": "string" },
        "health_validation_seconds": { "type": "integer", "minimum": 1 }
      }
    },
    "integrity": {
      "type": "object",
      "additionalProperties": false,
      "required": ["signature_algorithm", "signing_key_id", "policy_version"],
      "properties": {
        "signature_algorithm": { "const": "ed25519" },
        "signing_key_id": { "type": "string", "minLength": 8 },
        "policy_version": { "type": "string", "minLength": 1 },
        "revocation_list_version": { "type": "string" }
      }
    },
    "model": {
      "type": "object",
      "additionalProperties": false,
      "required": ["provider", "model_id", "revision", "runtime", "activation_name"],
      "properties": {
        "provider": { "type": "string", "minLength": 1 },
        "model_id": { "type": "string", "minLength": 1 },
        "revision": { "type": "string", "minLength": 1 },
        "runtime": { "type": "string", "minLength": 1 },
        "activation_name": { "type": "string", "minLength": 1 }
      }
    },
    "actions": {
      "type": "array",
      "items": {
        "type": "object", "additionalProperties": false,
        "required": ["order", "kind", "object", "failure_action"],
        "properties": {
          "order": { "type": "integer", "minimum": 1 },
          "kind": { "enum": ["install", "replace", "remove", "migrate", "activate", "validate"] },
          "object": { "type": "string", "minLength": 1 },
          "failure_action": { "enum": ["stop-safe", "rollback", "restore", "operator-recovery"] }
        }
      }
    }
  },
  "$defs": {
    "digest": { "type": "string", "pattern": "^sha256:[0-9a-f]{64}$" },
    "objectRef": {
      "type": "object",
      "additionalProperties": false,
      "required": ["path", "bytes", "digest"],
      "properties": {
        "path": { "type": "string", "pattern": "^[^/].*$" },
        "bytes": { "type": "integer", "minimum": 0 },
        "digest": { "$ref": "#/$defs/digest" }
      }
    }
  },
  "allOf": [
    {
      "if": {
        "properties": {
          "artifact": {
            "properties": {
              "type": { "const": "model-pack" }
            }
          }
        }
      },
      "then": { "required": ["model"] }
    },
    {
      "if": {
        "properties": {
          "artifact": {
            "properties": {
              "type": { "const": "update-bundle" }
            }
          }
        }
      },
      "then": { "required": ["actions"] }
    }
  ]
}