
One URL, Two Formats: How Our Site Serves Markdown to AI Agents
Every page of 99francs.agency is served as clean Markdown to any client that asks — same URL, one Accept header, about a tenth of the bytes. Here is the Next.js setup behind it: the proxy rewrite, the converter route, llms.txt — and the six-week bug that quietly served our homepage to every AI agent while every browser test passed.























