No. 015 TEARDOWN
Industry · 1 min · Apr 22, 2026
Foundation Model Margins, Three Years In
Training is the capital expense everyone discusses. Serving is the recurring one that decides who survives.
The notebook
Entries
27 dated entries, newest first. Teardowns, field notes, build logs, and signals.
No. 014 TEARDOWN
Physical AI · 1 min · Apr 22, 2026
The Humanoid Robot Bet
Every major lab is pouring capital into humanoid form factors. The bet is not really about robots — it is about data.
No. 013 TEARDOWN
Physical AI · 1 min · Apr 21, 2026
Dexterous Hands Are the Bottleneck
Legs got solved before hands. Manipulation, not locomotion, is what gates useful work.
No. 012 BUILD LOG
Future · 1 min · Apr 18, 2026
The Five-Person Unicorn
Coordination cost, not headcount, becomes the binding constraint on what a team can ship.
No. 011 BUILD LOG
Agents · 1 min · Apr 16, 2026
Evals Are the New Unit Tests
You would not ship code with no tests. Shipping an agent with no evals is the same bet.
No. 010 SIGNAL
Takes · 1 min · Apr 13, 2026
Against AI Doomer Cosplay
Doom and utopia are each a way of skipping the boring middle, which is where the work is.
No. 009 BUILD LOG
Industry · 1 min · Apr 11, 2026
Why Every SaaS Is Now an AI Company
Most of it is positioning. A few have actually rebuilt the workflow underneath.
No. 008 TEARDOWN
Agents · 1 min · Apr 8, 2026
The Agent Handoff Problem
Most multi-agent systems lose more in the handoffs than they gain from specialization.
No. 007 FIELD NOTE
Future · 1 min · Apr 5, 2026
When Verification Becomes the Job
As machines produce more, the scarce, paid work is checking that the output is actually right.
No. 006 BUILD LOG
Physical AI · 1 min · Apr 2, 2026
A Week With a Home Robot
It folded laundry and lost to a doorway. Notes from seven days of living with an early unit.
No. 005 SIGNAL
Industry · 1 min · Mar 28, 2026
The Open-Weights Question
A capable model you can run yourself changes every build-versus-buy call on the board.
No. 004 SIGNAL
Takes · 1 min · Mar 25, 2026
Hype Cycles Are a Feature
They overshoot, then recede, and leave real infrastructure behind. Learn to read the residue.