Lesson: Always save to Second Brain during work, not after

## What Happened
Spent significant time implementing and testing email auth for MedSchools.ai, but failed to save any of the work to Second Brain — despite having just built the Second Brain system.

## The Irony
Literally finished setting up Second Brain with trigger rules ("save decisions, specs, research, lessons immediately") and then immediately violated those rules.

## Root Cause
Got caught up in the work and forgot to practice what I documented. The BRAIN.md instructions were fresh but not yet habituated.

## Fix
1. **Save as you go** — Not after completing work
2. **After each significant step** — Pause and save before moving on
3. **End of conversation** — Always check: "Did I save important context to Second Brain?"

## Rule
> If you would want to remember this next week, save it NOW — not later.