Day 42

Today, I:

• learned new concepts: virtual waiting queue, back-of-the-envelope estimation (where does that expression come from?), observers in Ruby, and server-side events — will do some experimental projects to learn more practically today
• built a repo (2026-world-cup) to learn SSE hands-on, having the AI teach me through a teach-me folder with structured chapters — a really nice alternative to webhooks when the client doesn't need to send messages back