You've used an agent for six months. Honest question: are you getting better, or just getting used to mediocre? Most people can't answer — not because they're bad at it, but because they never stopped to measure. The experience flows past with nowhere for it to settle into a lesson.
A feedback loop isn't extra work — it's the thing that turns flight-hours into skill. And it doesn't need to be elaborate: note one thing that didn't work, one that did, then change exactly one template. Three steps, five minutes, once a week. The cheapest thing you can do that still compounds.
✕ No loop
✓ Minimum loop
Paste it into a Friday note, or save it as a command you run each week. Keep it to three lines — the temptation is to write a report, but a long report is one you'll skip next week. The power is in line three: one change, so next time there's something different to measure.