HN rcarmo 5/7/2026

Notes on GPT 5.x Model Regressions

Analysis of GPT-5.5 code generation regressions where the model makes unrequested changes and improvements to unrelated code.

LB github.com via gcv 5/7/2026

The Agent Harness Framework

Flue is a TypeScript framework for building AI agents with a built-in harness, designed as a headless, programmable alternative to Claude Code.

Ax Masafumi Oyamada, Kunihiro Takeoka, Kosuke Akimoto, Ryoma Obara, Masafumi Enomoto, Haochen Zhang, Daichi Haraguchi, Takuya Tamura 5/7/2026

cotomi Act: Learning to Automate Work by Watching You

Cotomi Act browser agent learning from user behavior observation with adaptive execution achieving 80.4% task success via multi-step execution.

Ax Zirui Tang, Xuanhe Zhou, Yumou Liu, Linchun Li, Weizheng Wang, Hongzhang Huang, Jun Zhou, Jiachen Song, Shaoli Yu, Jinqi Wang, Zihang Zhou, Hongyi Zhou, Yuting Lv, Jinyang Li, Jiashuo Liu, Ruoyu Chen, Chunwei Liu, GuoLiang Li, Jihua Kang, Fan Wu 5/7/2026

Workspace-Bench 1.0: Benchmarking AI Agents on Workspace Tasks with Large-Scale File Dependencies

Benchmark for evaluating AI agents on workspace tasks requiring reasoning over file dependencies in realistic work environments.

Ax Robert Gieselmann, Henrike von Huelsen, Mihai Samson, Marie-Christine Meyer, Dariusz Piotrowski, Oleksandr Radomskyi, Justin Okamoto, Turan Gojayev, Michael Painter, Gavin Brown, Federico Pecora, Jeremy L. Wyatt 5/7/2026

Self-Improvement for Fast, High-Quality Plan Generation

Self-improvement approach for generating high-quality plans in sub-exponential time using transformer-based generative models.

Ax Shuyue Stella Li, Rui Xin, Teng Xiao, Yike Wang, Rulin Shao, Zoey Hao, Melanie Sclar, Sewoong Oh, Faeze Brahman, Pang Wei Koh, Yulia Tsvetkov 5/7/2026

EvoLM: Self-Evolving Language Models through Co-Evolved Discriminative Rubrics

Language models self-improve through co-evolved discriminative rubrics without external supervision, eliminating reliance on human annotations or proprietary APIs.

Ax Joseph Breda, Fadi Yousif, Beszel Hawkins, Marinela Cotoi, Miao Liu, Ray Luo, Po-Hsuan Cameron Chen, Mike Schaekermann, Samuel Schmidgall, Xin Liu, Girish Narayanswamy, Samuel Solomon, Maxwell A. Xu, Xiaoran Fan, Longfei Shangguan, Anran Wang, Bhavna Daryani, Buddy Herkenham, Cara Tan, Mark Malhotra, Shwetak Patel, John B. Hernandez, Quang Duong, Yun Liu, Zach Wasson, Dimitrios Antos, Bob Lou, Matthew Thompson, Jonathan Richina, Anupam Pathak, Nichole Young-Lin, Jake Sunshine, Daniel McDuff 5/7/2026

SymptomAI: Towards a Conversational AI Agent for Everyday Symptom Assessment

Conversational AI agent for symptom assessment evaluating LLM performance in real-world patient interviewing scenarios.