Notes from inside the engine
Short pieces about the parts of building a venue that are usually kept quiet: where the price actually comes from, what a number means when it is wrong, and the mistakes we made finding out.
A meme coin at full confidence, gold degraded
Our first honest reading punished the most reliable market on the venue and waved through the least. The bug was not in the data. It was in believing that disagreement between venues means the same thing at every price.
ReadWhat a closed reference market costs you
Gold trades around the clock here and stops for an hour every evening in Chicago. Most venues ignore that. We price it, because the gap between a market that never closes and the market you would hedge in is where a weekend costs you everything.
ReadThe deploy script that deleted its own releases
For an unknown stretch, shipping and having shipped were different things, and nothing in the system said so. A short replay of a failure with no error message, and what we changed so the next silent one is louder.
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