marketing/marketing-email-strategist.md (#509) landed with CRLF line
endings, which violate .gitattributes (*.md text eol=lf) and broke
./scripts/lint-agents.sh — head -1 saw "---\r" and reported a confusing
"missing frontmatter opening ---" on a file that visibly starts with ---.
- Normalize that file to LF (content-neutral; 0 non-whitespace changes).
- Add a CRLF guard to lint-agents.sh that fails fast with a clear,
actionable message instead of the misleading frontmatter error.
Thanks @hedonnn for the Email Marketing Strategist agent — great content;
just needed the line endings normalized.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>