How to Build Your Own AI Agent (Like PewDiePie)

PewDiePie is building his own AI assistant, Odysseus, and training a local model, Ajax, to power it. In this video I break down what Odysseus is, how an agent harness works from scratch, what it actually means to run a model locally with llama.cpp and Hugging Face, and how you can fine-tune a small model like Qwen 3.5 9B on agent traces so it calls tools reliably in your own harness. --- 🔗 *Links* - Odysseus (GitHub): https://github.com/odysseus-dev/odysseus - Claude system prompts: https://platform.claude.com/docs/en/release-notes/system-prompts - Hugging Face models: https://huggingface.co