/**
 * Tests for `pieui card dump-metadata` envelope format policy.
 *
 * Critical invariants:
 *  - Output is always wrapped in `{ typescript: {...} }` — never bare.
 *  - Writing to --out file shallow-merges: only the `typescript` key is
 *    replaced; sibling keys (e.g. `python`) are preserved.
 *  - Re-running on the same --out file does not corrupt the sibling key.
 *  - Existing --out file must be valid JSON and a JSON object; otherwise
 *    a descriptive error is thrown.
 */
export {};
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