One useful AI thing a day, from actual practice. No hype, no roundups of roundups.

Note Jul 17

ChatGPT 5.6: Sol, Terra, Luna, Effort-Levels: How to Pick the Right One?

Note Jul 16

Why GEO Researchers Keep Studying Perplexity Despite Its 1.3% Web-Traffic Share

Prompt Jul 15

How and when to use /compact in Claude Code