The trick was doing some user-agent sniffing to detect if it's a request from a link preview or if it's a browser. If it's a link preview request the endpoint will return an HTML page with custom meta tags, otherwise it redirects you to the puzzle of the day.

Found this which is a good start
ilo.so/bluesky-link...

Thanks again for the feedback @gloomcloud.bsky.social around clue browsing 🙏

s/o to emoji-blast www.emojiblast.dev for a super fun to use library. I often incorporate this into side projects somehow

Thanks! Great feedback, I will definitely add that. I haven't posted the code anywhere, it's a vibe coded mess rn but I wanted to just get something out that worked, I plan on cleaning it up this week. Thanks so much for giving it a spin!!