John Abrahams

I'm a master's student in Data Science at Penn, graduating in December 2026. I built Kronos, a cloud for small software. This summer I was a software engineer intern at Ninth Wave, an open-finance fintech. I'm currently researching language models and world models.

Selected work

• Kronos: a Type II Exovisor
  A cloud for small software: deploy a Python or JavaScript program and share a link anyone can run.
• Reasoning and Memory in Language Models
  A recurrent reasoning graft for frozen language models, and when a deployed model should learn a fact in its weights or just look it up.
• Crowd-Aware Music Recommender
  Sensors track how a room's crowd moves; a GRU picks the next song and a reinforcement learning head adjusts to the crowd. With Chris Spletzer.

Essays

• The Exokernel Philosophy

Papers

• Kronos: The Architecture of a Multi-Tenant WebAssembly Runtime (2026, paper)
• A Recurrent Reasoning Graft in a Frozen Language Model (2026, unpublished)
• Predictive Outcome Modeling After ACDF (LDR-C ROI Implant) (2024, co-author, 236-patient cohort study)