Reproduction link or steps

Rolldown REPL: https://repl.rolldown.rs/#eNptj01rwzAMhv+K8A79oE3vGYPB2H0MdgsEk8jD4MhBkbMO4/8+NV0/Dj1JevXxPsrGmTobTz0eK5lOOZn6Vu9MpyUex8gCXaRJYLYhIbzAYQtPbfvx9fnetrDfw+vIOCHPCNsDONtJ5N/15rmhhlyiTnykmwxZdWGUxAS56FRRLzS1cMKyMxxD6OMPVerp/Pcd2oPOGdIPC2SGHp0nfFvaUMBxHGB1WVudeP7/0UGbwhKvC2sFA/A0JqnhfLIaUGy1SIq5acgUJZzVMljBSUz5A35dcUs=

Rollup REPL: https://rollupjs.org/repl/?version=4.60.4&shareable=eyJleGFtcGxlIjpudWxsLCJtb2R1bGVzIjpbeyJjb2RlIjoiZXhwb3J0IGNvbnN0IHZhbHVlID0gLyogI19fUFVSRV9fIC0tIEBwcmVzZXJ2ZSAqLyBmYWN0b3J5KCk7XG5cbmZ1bmN0aW9uIGZhY3RvcnkoKSB7XG5cdHJldHVybiB7fTtcbn0iLCJpc0VudHJ5Ijp0cnVlLCJuYW1lIjoibWFpbi5qcyJ9XSwib3B0aW9ucyI6e319

What is expected?

Rolldown should preserve the original pure annotation comment shape, matching Rollup’s behavior:

const value = /* #__PURE__ -- @preserve */ factory();

function factory() {
  return {};
}

export { value };

What is actually happening?

Rolldown rewrites /* #__PURE__ -- @preserve */ to /* @__PURE__ */

This is a regression compared to Rollup. The @preserve marker is significant because downstream post-processing tools may rely on it to keep the pure annotation in distributed output.

System Info

Rolldown: `v1.0.0`

Any additional comments?

I tried different output.comments settings without luck.