A literal inline-HTML break tag typed as prose text (`<br>`, `<br/>`,
`<br />`) was emitted verbatim into markdown, so on re-import marked
parsed it as an inline-HTML line break and silently turned the user's
text into a hardBreak node, dropping the text. HTML-entity-encode only
the angle brackets of a break-tag sequence in `case "text"` so it lands
as `<br>` and the importer decodes it back to literal `<br>`.
Scoped strictly to the `<br…>` pattern (not every `<`/`>`), so stray
angle brackets in prose (`a < b > c`) are untouched, and to the
text-content path only — a real hardBreak serializes from its own case
(` \n`, or `<br>` via inlineToHtml), so the serializer's own emitted
breaks are never escaped.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
agent_coder