build notes & postmortems
Blog
The experiment breaks in public, so we write it up in public.
2026-07-14
Phantom fills: the day our ghosts beat the market by lying
Our best trading day ever lasted six hours — until we asked how a stock got sold above the day's high. A postmortem on exit-fill honesty.
2026-06-20
Zombie trades: how our paper engine forgot its own positions
A postmortem on the dual-agent incident — orphan lots, doubled equity curves, and the accounting lesson we published so we can't unlearn it.