Sentralis

Correction: cheap software has become cheap!

It is correct that AI can create stunning, impressive single-user small apps. Building multi-tenant, big data, and complex applications is still an engineering challenge!

We decided in the end for a custom implementation, although that wasn't the plan at first.

A key requirement for us was that the same code had to run in the browser as well as in a Node worker behind the API and the MCP server and get exactly the same results (i.e. byte equivalence, not just being "close")

So numpy/scipy as the core were out from day one, and every JS dependency became something that could drift between the two builds. Easiest way to stop worrying about that was to have no runtime imports in the engine code at all.

It's less math than it sounds (in particular the system does not yet support derivatives). We just needed Cholesky plus a repair step for near-singular matrices, VaR/CVaR, drawdown, an inverse normal CDF, matrix times vector. Less than a thousand lines for the quant stuff.

The one library we did use was d3-random for the normal draws in the Monte Carlo. Then it turned out v3 is ESM-only and the backend is CommonJS, and after a frustrating few days we just copied the Marsaglia polar function into the repo and wrote a test that checks it against the real package. Seeded with mulberry32, seed is required, no Date.now fallback.

Where libraries do the heavy lifting is upstream: the covariance matrices (Ledoit-Wolf shrinkage) are precomputed in Python with numpy and scikit-learn and handed to the engines as inputs.

Thanks for the feedback! Landing page is indeed a little verbose, but there is also a lot of features which some might not be familiar with. You might find the app itself to be more streamlined.

Settlement agreement to be found here:

https://oag.dc.gov/sites/default/files/2026-08/Settlement%20...

I lived in Swizterland, but never experienced any refund. Some places would reject tips outright when asked or point out that your tip is excessive, but a refund?

For the unlucky, regular joe-shmoes who have to hunt for jobs, and don't come with the privilege of having relevant connections, the job market is getting tougher by the minute, not the least because of a flood of AI written applications paired with HR departments equally using AI for pre-filtering. Nobody reads any job descriptions, cover letters, CV's or applications anymore.