Engineering Insights

Context compaction for AI agents: a complete guide

Your agent just spent 40 turns debugging a gnarly authentication issue. It found the root cause, mapped out a fix, and started implementing. Then, somewhere around turn 45, it forgot everything it learned and started investigating from scratch. This ...

OpenAI, Grupo Folha and Grupo UOL announce strategic content partnership

OpenAI partners with Grupo Folha and Grupo UOL to bring trusted Brazilian journalism to ChatGPT, expanding access to news with attribution and transparency.

Harness, Scaffold, and the AI Agent Terms Worth Getting Right

Don't fall for the Claude Mythos hype

It’s just Anthropic’s marketing. Claude Mythos is making waves. Initially, the preview was only made available to a very select few Big Tech companies, such as Google and Apple. It seems Anthropic decided it would be too dangerous to release it to the public all at once. The access was gradually expanded, and recently, news broke in my country, Japan, that a major megabank had been granted access. Politicians are also treating it as a risk, and it feels like discussions about how to use AI safel

Vestige: A Gemma 4 Brain Tracker That Won't Blow Smoke Up Your Ass

This is a submission for the Gemma 4 Challenge: Build with Gemma 4 What: Vestige—an ADHD-friendly Android app designed to point out the things you don't know you're doing every day. 30-second voice entries in, sourced behavioral patterns out. No grading, no gamification, no feelings prompts. Gemma 4 doing real work: E4B handles native audio in (no SpeechRecognizer), transcription + persona-flavored follow-up in the foreground, then a 3-lens convergence extraction pass in the background. Embeddin

Gemminate: Transforming Static Textbooks into Interactive Learning Journeys with Gemma 4

This is a submission for the Gemma 4 Challenge: Build with Gemma 4 Static textbooks are a thing of the past. I built Gemminate, an intelligent, agentic learning platform that ingests raw textbook PDFs and instantly transforms them into interactive, personalized, and highly dynamic learning journeys. Instead of forcing students to read hundreds of pages sequentially, Gemminate uses AI to act as a 1-on-1 tutor. When a user uploads a PDF, the platform: Extracts and Maps: Analyzes the Table of Cont

Where Did All the Code Playgrounds Go?

I wanted to get better at technical interviews. That's really where this story starts. A couple of years ago I was taking Master the Coding Interview on Udemy — a course from ZTM (Zero to Mastery). It covers the fundamentals well: what algorithms actually are, what data structures do, and the relationship between time and memory that underlies almost every engineering decision you'll ever make. Many people criticize it. I thought it was good. The instructor taught everything using Replit. All th

I built PROOFER - Privacy first Chrome extension that proofreads your texts using Gemma 4

This is a submission for the Gemma 4 Challenge: Build with Gemma 4 I built PROOFER, a privacy first browser extension that helps me proofread text right where I am already typing, whether that is an email draft, a Discord message, a social post, or any other editable text field on the web. Instead of copying text into a separate chatbot tab, PROOFER lets me select the text in place and trigger proofreading from a floating action button, a context menu entry, or a keyboard shortcut. The extension