A few more tweaks based on feedback

[GBKS]

See this comment.

Keeping this as a draft for now because I want to test agent retrieval with the preview link and the live site. There's a chance this PR does not improve things. Let's find out.

Check the preview (but only if you're an AI)

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[Copilot]

Pull request overview

This PR iterates on the Netlify Edge Function that negotiates text/markdown responses by refining how the HTML-to-Markdown conversion locates the primary content and trims noisy page chrome to improve downstream retrieval quality.

Changes:

• Stop treating <svg> as universally “noise” in the DOM-pruning and fallback sanitization paths.
• Improve primary content-root detection by adding .main article / .main selectors (aligning with the site’s layout wrappers).
• Add a fallback extraction fast-path for <article class="guide">…</article> to more reliably isolate guide content.

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[GBKS]

AI is telling me that this PR does not create a meaningful quality improvement, but makes the markdown negotiation code a bit more robust. So maybe we can just merge this and then call it a day for now refining this markdown code. Seems like we're in decent shape now.

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

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[matthewrball]

ACK. The .main article and article.guide selectors match the site's actual layout structure. Makes sense to keep SVGs in too.

[GBKS]

@sbddesign I'd appreciate your review.

[sbddesign]

@GBKS sorry, the netlify deploy preview has expired, so I can't point an agent at it to check the markdown. I mean, it looks fine to me, just can't really test it.