Jannik Agethen
Independent engineer — Germany

I build systems that test other systems.

Independent engineer working on open-source models, local inference, and security tooling. Currently building an open cybersecurity agent and the harness it runs in.

  • Models · Prisma

    Prisma

    A small open-source organisation I run. It trains and releases open models. Everything is built and maintained by one person, which sets the constraint: small models, tight data, no budget for waste.

  • Inference

    Local LLM stack

    A local inference setup built on llama.cpp with my own model and provider configuration, plus Qwythos on top. Running models on my own hardware taught me more about their real limits than any benchmark did.

  • Security

    Red-team environment

    A test environment for attacking my own software and local endpoints before anyone else does. Fuzzing, prompt injection, misconfigured services, exposed local ports. Everything is run against systems I own.

Now

Building a cybersecurity agent model and its harness. Both will be released open source under Prisma, a small open-source organisation I run that trains open models.