declare namespace v1 {
    /**
     * The Standard Schema interface.
     */
    interface StandardSchema<Input = unknown, Output = Input> {
        /**
         * The Standard Schema properties.
         */
        readonly "~standard": StandardSchemaProps<Input, Output>;
    }
    /**
     * The Standard Schema properties interface.
     */
    interface StandardSchemaProps<Input = unknown, Output = Input> {
        /**
         * The version number of the standard.
         */
        readonly version: 1;
        /**
         * The vendor name of the schema library.
         */
        readonly vendor: string;
        /**
         * Validates unknown input values.
         */
        readonly validate: (value: unknown) => StandardResult<Output> | Promise<StandardResult<Output>>;
        /**
         * Inferred types associated with the schema.
         */
        readonly types?: StandardTypes<Input, Output> | undefined;
    }
    /**
     * The result interface of the validate function.
     */
    type StandardResult<Output> = StandardSuccessResult<Output> | StandardFailureResult;
    /**
     * The result interface if validation succeeds.
     */
    interface StandardSuccessResult<Output> {
        /**
         * The typed output value.
         */
        readonly value: Output;
        /**
         * The non-existent issues.
         */
        readonly issues?: undefined;
    }
    /**
     * The result interface if validation fails.
     */
    interface StandardFailureResult {
        /**
         * The issues of failed validation.
         */
        readonly issues: ReadonlyArray<StandardIssue>;
    }
    /**
     * The issue interface of the failure output.
     */
    interface StandardIssue {
        /**
         * The error message of the issue.
         */
        readonly message: string;
        /**
         * The path of the issue, if any.
         */
        readonly path?: ReadonlyArray<PropertyKey | StandardPathSegment> | undefined;
    }
    /**
     * The path segment interface of the issue.
     */
    interface StandardPathSegment {
        /**
         * The key representing a path segment.
         */
        readonly key: PropertyKey;
    }
    /**
     * The base types interface of Standard Schema.
     */
    interface StandardTypes<Input, Output> {
        /**
         * The input type of the schema.
         */
        readonly input: Input;
        /**
         * The output type of the schema.
         */
        readonly output: Output;
    }
    /**
     * Infers the input type of a Standard Schema.
     */
    type InferInput<Schema extends StandardSchema> = NonNullable<Schema["~standard"]["types"]>["input"];
    /**
     * Infers the output type of a Standard Schema.
     */
    type InferOutput<Schema extends StandardSchema> = NonNullable<Schema["~standard"]["types"]>["output"];
}

export { v1 };