Principal AI Engineer

Daniel Halwell

Daniel Halwell's portfolio — a tiny operating system with a real shell. AI engineering, research and writing.

AboutResumeOpen HalwellOS

Projects

agent-orchestratorA runtime for multi-agent workflows with tracing, retries and human-in-the-loop checkpoints.eval-harnessRegression testing for LLM features.rag-at-scaleRetrieval over millions of documents with hybrid search, reranking and freshness guarantees.this-websiteHalwellOS — a portfolio that boots.

Research

Papers, preprints, posters and talks.

Blog

Building this websiteA portfolio you can explore rather than scroll.Evals are the productIf you can't measure it, you're demoing it.Agents need boring infrastructureThe interesting part of an agent is the model; the reliable part is everything else.

Files

Downloads — CV, slides, datasets.