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Series · 4 parts · 16 min

Built with AI

  1. Part 14 min readBeginnerUp next

    I Built a Lottery App That Refuses to Predict the Jackpot

    Hot numbers and AI predictions promise a jackpot edge that does not exist. vietlott-lab computes Vietlott odds exactly, picks tickets that win any prize more often (23.01% against 22.06% for ten Mega tickets), and says on the pick screen that no pick changes the jackpot odds.

  2. Part 24 min readIntermediate

    A Spider Crawls Over My Screen and Remembers What It Read

    Screen Spider is a Windows screen capture app: a hotkey reads the screen with on-device OCR, a spider walks the exact lines it read, only that text goes to Claude, and each read becomes a searchable note. Windows on the blocklist are never captured.

  3. Part 34 min readIntermediate

    An AI Meeting Assistant That Never Hears the Audio

    Meeting Capture has no audio input: it reads Windows Live Captions, so speech recognition stays on the PC. Press a key when a question starts; a second press or a 2-second pause sends it, and an answer you can say out loud starts in about 0.8 seconds.

  4. Part 44 min readIntermediate

    One Skill Folder That Works in Every Coding Agent

    agent-skills keeps each skill as one folder in the open Agent Skills format, installs it where Claude Code, Codex, Copilot, Cursor and Gemini CLI look, fails it in CI when it breaks a rule, and ships checks such as check_email.py that can fail.