Most software pulls work toward you. I build software that pushes it away. The measure of a system is whether it holds once you leave the room.
An operations layer for German tax practices. No dashboard, no upload. It sits in the mail flow. Post arrives, it is read and classified, the figures are computed deterministically and traced to the paragraph of law that produced them, a reply is drafted on the firm's letterhead, and the Berufsträger receives one email with the draft, the figures, and a confidence score. He gives Freigabe. It files, it logs, it watches the Fristen.
No one has to watch it, and no one has to learn it. There is no dashboard, nothing to open, nothing new in the office. The routine simply stops reaching desks. It works in the background.
No model ever computes a number. Nothing leaves the building. § 203 permits no other architecture.
It prepares and it proves. It does not sign.
The compute layer. Calculators generated from the Bundesfinanzministerium's own published pseudocode rather than transcribed by hand, because transcribing it by hand gets the decimals wrong. Exact decimal arithmetic, no floating point. Every figure carries its paragraph and the hash of the source it came from. Checked against an independently written implementation across 25 statutory years: 100.000 field comparisons, zero deviations, on value and on scale.
The mail loop and the channels. The Fristen register. The Freigabe routing. The revisionssichere archive. The operator dashboard.
The same architecture at the scale of one firm. Reads a DATEV export and finds money left behind. Runs entirely on the advisor's own machine. Zero outbound connections, checkable in the network tab. The advisor approves and files. staedy never files.
Complete, and sold to nobody. One practice cannot justify the layer beneath such a tool. Across thirty locations the arithmetic reverses.
staedy.com the demo runs on sample data
Three exits. A leadership layer rebuilt in ninety days, which cannot be done by hand, because the whole job is getting other people to own outcomes and then not taking them back.