Lechen Zhang

@leczhang.bsky.social

CS PhD @UIUC | Prev. MSc @UMich & BEng @SJTU. Interested in #NLProc & #AI. leczhang.com

1/ When chatbots remember something about you in “𝗽𝗲𝗿𝘀𝗼𝗻𝗮𝗹𝗶𝘇𝗲𝗱” answers, does it ever feel uncomfortable, offensive, or just unnecessary? 🚨 Our paper argues these misalignments reflects a deeper issue in LLM personalization: 𝗼𝘃𝗲𝗿-𝗿𝗲𝗹𝗶𝗮𝗻𝗰𝗲 𝗼𝗻 𝘀𝘆𝗻𝘁𝗵𝗲𝘁𝗶𝗰 𝘂𝘀𝗲𝗿𝘀 𝗮𝗻𝗱 𝗟𝗟𝗠 𝗷𝘂𝗱𝗴𝗲𝘀. 🧵👇

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🚨 𝙋𝙤𝙨𝙩𝙚𝙧 @ #ICLR2026 🇧🇷 🚨 Is your 𝘀𝘆𝘀𝘁𝗲𝗺 𝗽𝗿𝗼𝗺𝗽𝘁 actually optimal? 🚀 Catch me this Saturday (Apr 25) 3:15–5:45pm at Pavilion 3, Poster #1314 presenting 𝙎𝙋𝙍𝙄𝙂, an automatic genetic optimizer for system prompts! Come check it out and let's chat!

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This major release of my lab's annotation tool, Potato 2.0, was a long time in the making but I'm really excited by all the new features (and quality of life improvements). If you're doing data annotation of any kind, check it out. Need any other features? We'd love to hear from you too!

@potatoannotator.bsky.social · 9mo ago

Super proud that today we're releasing Potato 2.0 - the biggest update yet to our open-source annotation platform www.potatoannotator.com 🥔 Major UI/UX improvements. Support for image, audio & video annotation. AI-powered assistance/hints/labeling. And still free 🤩 Here's some of what's new: