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  1. My stealth model signed its commits as Claude Opus

    A commit signature raised a question about model identity. Here is what it can and cannot establish.

  2. There's no such thing as "just move it to a VPS"

    Moving a site to a VPS sounds like an afternoon of work. Why cheap code, old systems and real infrastructure make it a much bigger job.

  3. KIMEP lost its app, so I wrote a new one

    KIMEP's student app vanished from the App Store while its service kept running. So I wrote a new mobile client for my schedule and grades.