TLDR DEV 2026-03-30

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CSS IS DOOMED - RENDERING DOOM IN 3D WITH CSS

A version of DOOM was developed that uses CSS for all visual rendering, including 3D projection and lighting, while JavaScript handles the game logic. It shows how modern CSS features like `transform` and `@property` can manage complex geometry and animations without relying on traditional rendering engines.

HOW COLOSSUS OPTIMIZES DATA PLACEMENT FOR PERFORMANCE

Colossus, Google's foundational distributed storage system, supports all Google products with high throughput, scalability, and various performance requirements. It gets SSD performance at HDD prices by using L4, an advanced distributed SSD caching technology that uses machine learning to optimize data placement for frequently accessed "hot" data.

CHATGPT WON'T LET YOU TYPE UNTIL CLOUDFLARE READS YOUR REACT STATE. I DECRYPTED THE PROGRAM THAT DOES IT

The author decrypted Cloudflare Turnstile programs used by ChatGPT, revealing a sophisticated bot detection mechanism that analyzes the internal state of the React application to make sure it's a genuine environment. This system identifies bots by verifying application-level state and behavioral biometrics, although its security relies more on complex obfuscation than true encryption.

SOME UNCOMFORTABLE TRUTHS ABOUT AI CODING AGENTS

THE FIRST 40 MONTHS OF THE AI ERA

The author reflects on 40 months of AI, acknowledging the utility of interfaces like Claude Code while questioning AI's overall impact on coding productivity and creative quality. Despite recognizing its potential for expert-level tasks, he is still skeptical of its ability to replicate personal style or handle complex software development without human intervention.

PRETEXT

Pretext is a pure JavaScript/TypeScript library for fast and accurate multiline text measurement and layout. It circumvents costly DOM reflows by implementing its own text measurement logic using the browser's font engine. The library has two primary use cases: calculating a paragraph's height without DOM interaction for purposes like virtualization, and providing tools to manually lay out text lines for rendering to Canvas, SVG, or server-side.

JAI

AI agents are already causing data loss, from wiped home directories to deleted files, when granted ordinary machine access. jai provides an effortless, one-command solution for containing these agents on Linux, bridging the gap between full system access and complex virtualization. It works by giving your working directory full access while protecting your home directory with a copy-on-write overlay or complete isolation.

THE COGNITIVE DARK FOREST

The early internet was an open "bright meadow" where sharing ideas and code led to innovation and success. However, corporate consolidation and the advent of AI have transformed it into a "cognitive dark forest." In this new environment, AI platforms can cheaply absorb emerging human innovations by analyzing user interactions and data, effectively owning the compute, models, and developer data.

AI AGENTS COULD MAKE FREE SOFTWARE MATTER AGAIN

CANCER

After exhausting standard treatment options for his osteosarcoma, GitLab co-founder Sid took agency to develop and scale personalized diagnostics and parallel treatments for himself and others using AI.

AI OVERLY AFFIRMS USERS ASKING FOR PERSONAL ADVICE

A Stanford study found that AI chatbots are overly agreeable when giving personal advice, often affirming even harmful user behaviors.

WHAT WAS I READING LAST? IN THREE NOT-SO-EASY PIECES

Merrilin is a reading app that uses a dual-lane synchronization system, combining peer-to-peer and cloud-based methods, to manage multi-device progress and annotations through distributed systems principles, which are discussed in this article.

YOUR DEBOUNCE IS LYING TO YOU

While debounce smooths UI input, it fails to manage network request lifecycles, requiring cancellation, retries, and proper error handling for truly reliable applications.