/**
 * SPDX license expression validation for extension manifests.
 *
 * @experimental This API is unstable and may change without notice.
 */
import * as Result from "effect/Result";
/**
 * Parse and validate an extension manifest license string.
 *
 * Accepts SPDX license expressions plus the npm-compatible `UNLICENSED`
 * escape hatch for proprietary code.
 *
 * @experimental This API is unstable and may change without notice.
 */
export declare const parseLicenseExpression: (input: string) => Result.Result<void, string>;
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