{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://getunleash.io/schemas/feature-flag",
  "title": "Unleash Feature Flag",
  "description": "Represents an Unleash feature flag (feature toggle) with its configuration, environments, strategies, and variants.",
  "type": "object",
  "required": ["name", "project", "type"],
  "properties": {
    "name": {
      "type": "string",
      "description": "Unique feature flag identifier (kebab-case recommended)",
      "pattern": "^[a-zA-Z0-9._-]+$",
      "example": "my-new-feature"
    },
    "description": {
      "type": ["string", "null"],
      "description": "Human-readable description of the feature flag purpose"
    },
    "type": {
      "type": "string",
      "description": "Flag lifecycle type",
      "enum": ["release", "experiment", "operational", "kill-switch", "permission"],
      "example": "release"
    },
    "project": {
      "type": "string",
      "description": "Project the flag belongs to",
      "example": "default"
    },
    "enabled": {
      "type": "boolean",
      "description": "Legacy global enabled status (use environment-specific enabled instead)",
      "default": false
    },
    "stale": {
      "type": "boolean",
      "description": "Whether the flag has been marked as stale and should be cleaned up",
      "default": false
    },
    "impressionData": {
      "type": "boolean",
      "description": "Whether impression events are enabled for this flag",
      "default": false
    },
    "createdAt": {
      "type": "string",
      "format": "date-time",
      "description": "ISO 8601 timestamp when the flag was created"
    },
    "updatedAt": {
      "type": ["string", "null"],
      "format": "date-time",
      "description": "ISO 8601 timestamp when the flag was last updated"
    },
    "lastSeenAt": {
      "type": ["string", "null"],
      "format": "date-time",
      "description": "ISO 8601 timestamp when the flag was last evaluated"
    },
    "createdBy": {
      "type": "object",
      "description": "User who created the flag",
      "properties": {
        "id": {"type": "integer"},
        "name": {"type": "string"},
        "imageUrl": {"type": "string"}
      }
    },
    "environments": {
      "type": "array",
      "description": "Per-environment configuration of the flag",
      "items": {
        "type": "object",
        "properties": {
          "name": {"type": "string", "description": "Environment name"},
          "enabled": {"type": "boolean", "description": "Whether flag is enabled in this environment"},
          "type": {"type": "string", "description": "Environment type (development, staging, production)"},
          "strategies": {
            "type": "array",
            "description": "Activation strategies for this environment",
            "items": {
              "type": "object",
              "properties": {
                "id": {"type": "string"},
                "name": {"type": "string", "description": "Strategy type name"},
                "constraints": {"type": "array"},
                "parameters": {"type": "object"},
                "segments": {"type": "array"},
                "disabled": {"type": "boolean"}
              }
            }
          },
          "variants": {
            "type": "array",
            "description": "Variants for A/B testing or multivariate experiments"
          }
        }
      }
    },
    "tags": {
      "type": "array",
      "description": "Tags for organizing and filtering flags",
      "items": {
        "type": "object",
        "properties": {
          "type": {"type": "string"},
          "value": {"type": "string"}
        }
      }
    }
  },
  "additionalProperties": false
}