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SebastianSosa

12 karma · joined July 27, 2023

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SebastianSosa··on Binance-hacker-1029 – $5.6B stolen from Binance
If this is real short, crypto hard
SebastianSosa··on GPT‑6 and Intelligent UI for everyone
Literate people lost their edge
SebastianSosa··on GPT‑6 and Intelligent UI for everyone
Children learn very quickly. Our biases on maturity should not influence our idea on what makes for effective learning
SebastianSosa··on Clef: Open-weight decision models, and new RL fine-tuning platform
Public benchmarks are easy to cheat, if I am typesafe I would also release a public benchmark to distract otherwise competent people in overfitting to a benchmark instead of making something actually useful. Diogo very much is against public benchmarks ;)
SebastianSosa··on How to stop Claude from saying load-bearing
This a you problem
SebastianSosa··on The Eternal Sloptember
A problem that's impossible to detect is indistinguishable from it working. Hence it works. Hence it's not a problem.
SebastianSosa··on Microsoft reports AI is more expensive than paying human employees
Makes me feel good about my career. Upvote
SebastianSosa··on Letting AI play my game – building an agentic test harness to help play-testing
Edit: let me begin with this is fucking brilliant!!

What if the event flow has a time component?

My naive guess is make the time ticker a tool claude can control time.

Which would bifurcate the control surface into two classes: user accessible (keypress) and user inaccessible (fixtures, time).

"tick" would not work for small intervals.

Instead you would need "progress_x_time".

The concept of non-linear problems lingers in my mind.

SebastianSosa··on I gave every train in New York an instrument
Hey, this is amazing. I've been building another musical toy that I'm terming Euclidean Pulses, but I haven't been able to find a good library for making sounds. What did you use?
SebastianSosa··on Show HN: Reverse-engineered Claude in Chrome after the source leak
After the Claude Code source leak, instead of digging through feature flags and anti-distillation defenses, I focused on what I could ship. I focused on reverse-engineering Claude in Chrome from its MCP tool schemas. Clean room, not a fork.

Claude in Chrome blocks 58 domains. Banks, Tinder, Reddit, Robinhood, Bloomberg. Also only works in Chrome and Edge. open-claude-in-chrome has none of that.

Same 18 tools, same performance. Claude doesn't know the difference because it was trained on these exact schemas.

Stuff I found running both extensions side-by-side:

- The official forces deviceScaleFactor: 1 via CDP. Without this, Retina displays make every click miss. Spent an afternoon staring at window.devicePixelRatio to figure that one out.

- It doesn't return screenshots on clicks or typing. Only on screenshot and scroll. I was returning one on every action and burning through the 20MB API limit in 15 calls.

Case study on how I built it: https://www.noemica.io/blog/reverse-engineered-claude-in-chr...

SebastianSosa··on Autoresearch on an old research idea
autoresearch is a trivial research idea "ablate through experiments with knowledge over previous experiments"
SebastianSosa··on Chuck Norris has died
All due respect, no comparison, teddy is a real legend not just cinema. Lets not conflate the two. Much love to chuck though.
SebastianSosa··on Ask HN: What Are You Working On? (March 2026)
A developer tool that lets you (or your coding agent) understand how users will experience your AI product before you ship it.
SebastianSosa··on Ask HN: What Are You Working On? (March 2026)
A developer tool that lets you understand how users will experience your AI product before you ship it.
SebastianSosa··on The Waymo World Model
Very concerned with this direction of training “counterfactual events such as whether the Waymo Driver could have safely driven more confidently instead of yielding in a particular situation.” Seems dicey. This could lead in the direction to a less safe Waymo. Since the counterfactual will be generated, I suspect that that the generations will be biased towards survivor situations where most video footage in its training data will be from environments where people reacted well not those that ended in tragedy. Emboldening Waymo on generated best case data. THIS IS DANGEROUS!!!
SebastianSosa··on Claude Opus 4.6
now thx to this post (and the infra provider inclination to appeal to hacker news) we will never know if the model actually discovered the 50 spells or memorized it. Since it will be trained on this. :( But what can you do, this is interesting
SebastianSosa··on OpenTSLM: Language models that understand time series
I understand this provides a conversation interface for interacting with internet scale data (ChatGPT), but is there any benefit to this over searching in Google then clicking on the top link, (avoiding the ad) clicking accept my cookies, reading the header, scrolling down, Xing out of premium subscription, reading rest of article, repeat for the 4 next links?

Ok bro.

SebastianSosa··on Ask HN: Who wants to be hired? (February 2025)

  Location: US
  Remote: Yes
  Willing to relocate: Yes
  Technologies: Full-stack SWE
  Résumé/CV: Upon request
  Email: 1sebastian1sosa1@gmail.com
All info here https://www.kuoly.com/ctg/880e935b-14c5-44b1-9c69-b5f9602309...
SebastianSosa··on Stimulation Clicker
Neal.. screw you. Youve robbed me of 15 mins. So far....
SebastianSosa··on Action Collective: Community Driven Actions Database
Request for feedback. All ideas, criticisms, and concerns are welcome!
SebastianSosa··on Structured Outputs with Ollama
Yeah... I was hoping to collaborate in building this but the conversation reached an abrupt end.
SebastianSosa··on Open-source SDK for autonomously organizing data in hierarchical structures
It is designed to be fully modular with the ability to have a human/programmer in the loop at any stage of the process. Enabling you to: - effectively execute hierarchical orchestration :chains: - visualize data in an organized manner - dynamically classify items - etc. (I would love to learn about what you may use it for!)
SebastianSosa··on Building OpenGPTs: A Fully Open-Source GPT Store Alternative
Excited to share the v0 of OpenGPTs-platform https://github.com/OpenGPTs-platform , an open-source project aimed at replicating and surpassing the "GPT store" with a focus on minimal abstraction, high modularity, and extensibility. Our platform is built to seamlessly integrate a wide array of tools, empowering the community to contribute and expand beyond the existing capabilities of conventional platforms. The initial release features an enhanced "Assistants API" with tools like "retrieval", identical to the one from the GPT store, and a custom "web_retrieval" tool designed for efficient retrieval of information from pre-indexed websites, developed in collaboration with https://huggingface.co/spaces/seansullivan/Better_Langchain_... . Check out our project on GitHub and watch our demo on YouTube https://www.youtube.com/watch?v=yPdIEKb3jWc . Join our Discord community https://discord.gg/23aZEjyjp2 to get involved and help us shape the future of OpenGPTs!