fathom-lab / styxx Star 5 Code Issues Pull requests Cognitive observability for LLM agents. Cognometric instruments + self-healing reflex (F10) + MCP server. Pure-Python, MIT, no LLM required. 9-for-9 on K=1 phase transition. Every Mind Leaves Vitals (DOI 10.5281/zenodo.19777921). python mit-license ai-safety nli rag guardrails llm llm-safety hallucination-detection truthfulqa halueval cognometry halubench Updated May 20, 2026 Python