field notes codename
60 notes filed under ABACUS, newest first. Same rules as the rest of the pile: a codename, a theme, and no internals.
The system had a number it liked. It came from a cost model assembled out of a small table of assumed per-transaction costs — reasonable when written, never checked against what the system actually paid. Every optimisation downstream…
elsewhere
Each codename is a project. The theme is the class of problem the note is about — the same theme recurs across projects, which is usually the interesting part.