Hi, nice to meet you!

I’m Darion, a researcher working on alignment at Anthropic.

Recent publications

VERGE: Formal Refinement and Guidance Engine for Verifiable LLM Reasoning Vikash Singh, Darion Cassel, Nathaniel Weir, Nick Feng, Sam Bayless EMNLP 2026
Learning to Triage Taint Flows Reported by Dynamic Program Analysis in Node.js Packages Ronghao Ni, Aidan Z. H. Yang, Min-Chien Hsu, Nuno Sabino, Limin Jia, Ruben Martins, Darion Cassel, Kevin Cheang ASE 2026
VeriCoT: Neuro-Symbolic Chain-of-Thought Validation via Logical Consistency Checks Yu Feng, Nathaniel Weir, Kaj Bostrom, Sam Bayless, Darion Cassel, Sapana Chaudhary, Benjamin Kiesl-Reiter, Huzefa Rangwala ICLR 2026