declare const makeProvider: (
  fileName: string,
  options?: { readonly formats?: ReadonlyArray<Kind>; readonly searchPaths?: ReadonlyArray<string> } | undefined
) => Effect<ConfigProvider, ConfigFileError, Path | FileSystem>

declare const ConfigErrorTypeId: unique symbol

type ConfigErrorTypeId = typeof ConfigErrorTypeId

declare const ConfigFileError: (message: string) => ConfigFileError

export interface ConfigFileError extends YieldableError {
  readonly [ConfigErrorTypeId]: ConfigErrorTypeId
  readonly _tag: "ConfigFileError"
  readonly message: string
}

declare const layer: (
  fileName: string,
  options?: { readonly formats?: ReadonlyArray<Kind>; readonly searchPaths?: ReadonlyArray<string> } | undefined
) => Layer<never, ConfigFileError, Path | FileSystem>

type Kind = "json" | "yaml" | "ini" | "toml"