The _ob_stash regex in renderMd() used (<code>[^<]*</code>) which failed to match <code class="language-sql"> tags (attributes) and couldn't capture multiline content. Code blocks leaked into the bold/italic pipeline, corrupting SQL/C# comments into <strong><em> tags and producing < artifacts. Replace with (<code\b[^>]*>[\s\S]*?</code>) to handle attributes and multiline content correctly. Closes #890 Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>