Engineering intelligence, quantified.

I Built an AI Second Brain That Versions Itself

Karpathy's video inspired markdown files and CLI scripts. Here's what five months of building actual infrastructure taught me.

Typed intelligence, token budgets, semver versioning, and the closed flywheel that turns each session's learnings into the next session's grounding. This is what a factbook looks like when it grows from real engineering work — not from configuration files.