# Field Notes

In-depth notes on the engineering behind Estravon and Tiberavon — the decisions, the trade-offs, ...

- [Why we don't just run a text extractor on every PDF](https://www.tiberavon.com/field-notes/vlm-vs-text-extraction) (2026-08-09) — On markitdown, VLMs, and how to tell when a "good enough" extractor has quietly failed.