Athenaeum is an open-source knowledge management pipeline designed around a few deliberate constraints: append-only intake (you add, never overwrite), tiered compilation (raw notes get processed into increasingly refined layers), and passive recall (the system surfaces relevant knowledge without you having to query it explicitly). Configurable schemas let you adapt the structure to your own domains or workflows. It's built for developers and researchers who want programmatic control over how their knowledge is ingested, stored, and retrieved — rather than relying on a GUI-driven notes app. The GitHub repo (Kromatic-Innovation/athenaeum) positions it as infrastructure-level tooling you integrate into your own stack.