I intend to contribute to Suri, is there a resource that shows things like architectural diagrams to get up to speed with how the software works.
I guess 25. Suricata Developer Guide — Suricata 7.0.0-rc2-dev documentation and Suricata - Suricata - Open Information Security Foundation are the best we have so far, cc @jufajardini
Disclaimer: the dev documentation is a work in progress at the moment.
We also have suricata: Doxygen documentation