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Building Apex City: Build a city that actually works.

Apex City is out now on iOS, Android, Web. This is the story of how it got made. What it isApex City is a city builder with a real simulation underneath. Every home has residents who need power, water, schools and a safe street. Lay roads, zone districts, build utilities and services, and watch traffic, blackouts and crime emerge from your layout rather than from random events. Fix the water shortage you created, then redesign the district that caused it.Transport is the endgame: open an ai

From generating files to using tools: a code agent's ReAct loop

So far in this series, the agent generated the whole solution in a single call: you gave it the spec and the tests, and the model returned the entire function. That works when the whole task fits in a prompt. But in a real repository you don't know in advance which files you'll need, and you can't fit thousands of them into the context window. The leap in this post is to give the agent tools so it can get that context itself: read, search, edit, and run commands. That pattern—reason, act with a

Rapid SaaS Prototyping: Building Production MVPs in 4 Weeks with React and Vite

Executive SummaryIn modern enterprise software engineering, building high-performance systems requires more than just calling third-party API wrappers. True competitive advantage comes from architecting custom, low-latency data pipelines and decoupled microservices that guarantee operational resilience, data privacy, and measurable ROI. Key Architectural ConsiderationsWhen engineering custom AI and automation workflows, enterprise development teams must balance speed, security, and sc

Artificial Analysis Intelligence Index v4.2

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Architectural Breakdown: Recommendations Are Cheap. Enforcement Is the Feature: Building a Backlog-P

# Recommendations Are Cheap. Enforcement Is the Feature: Building a Backlog-Pressure Gate for Self-Regulating Schedulers## The Delusion Nobody AdmitsMost scheduler backpressure designs stop at a heuristic: *"if queue depth exceeds threshold T, slow down ingestion."* That is a recommendation engine wrapped in production code. U

Reversing MikroTik's Silent Patch: The RouterOS 7.23.4 Fix They Wouldn't Explain

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Portal by Spotify cut my Claude Code token usage by 90%

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Ownership in Rust: A JavaScript Dev's Quest Like Neo in The Matrix

The Quest Begins (The "Why")I still remember the first time I tried to port a little Node.js utility to Rust. I was confident—I knew callbacks, promises, and the event loop like the back of my hand. I wrote a function that grabbed a user object, tweaked a field, and returned it. In JavaScript it looked something like this:function updateUser(user) { user.lastLogin = Date.now(); return user;}I called it, passed the same object around, and everything seemed fine—until I started mutating th

My checkout said it was ready for a month. Nobody could have paid.

The dashboard for my payment provider reads, for the whole life of the account:Revenue since inception USD 0.00Transaction History Total count: 0Users Total count: 0Live mode and sandbox mode, same numbers. The easy reading is that nobody wanted it.Here is the harder reading. Over the eight days my analytics still retains, 21 of 228 real visits reached the pricing page. Not one of those 21 had anything to click. The buy button was there. It was styled, it was enabled,

How to Access Free AI Models (GPT-4o, DeepSeek, Flux) Without an API Key

Finding free AI API endpoints for side projects without jumping through credit card verifications or key rotations can be annoying. In this quick guide, I'll show you how to call text generation (LLM), image generation, and video models completely keyless using standard HTTP requests. 1. Text Generation (LLM) Example in Node.jsHere is how to fetch a response from a free LLM endpoint using standard Javascript:javascriptconst response = await fetch('[https://cvron.alwaysdata.net/cvronai/llama

Debugging Async/Await Deadlocks in JavaScript: A Step‑by‑Step Guide for Developers

IntroductionAsync/await has become the de‑facto way to write readable asynchronous JavaScript. Yet, when promises are chained incorrectly or the event loop is unintentionally blocked, developers can encounter deadlocks that freeze an entire application. This post walks you through the root causes, shows how to reproduce the issue, and provides a systematic troubleshooting workflow. 1. What Is an Async/Await Deadlock?A deadlock occurs when an await expression never resolves because the

Google Slides AI is laughably bad

💡 TL;DR &amp; Key Takeaways:**TL;DR**Google Slides’ new “Beautify” AI merely snapshots a slide as an image, exposing how legacy slide file formats hinder true AI‑driven editing. Simpler, plain‑text formats (e.g., single‑file HTML slides) could unlock seamless, editable AI enhancements. - The “Beautify” button converts editable content into a static image, preventing further modifications.- Complex, backward‑compatible slide data models limit AI integration, forcing developers to choose quick vi

Architecting Enterprise Angular with Signals: Zoneless Reactivity and 60fps Performance

Architecting Enterprise Angular with Signals: Zoneless Reactivity and 60fps PerformanceFor nearly a decade, Angular relied on Zone.js to intercept asynchronous browser events and trigger top-down dirty checking across the entire component tree. In large enterprise dashboards displaying live telemetry, grid streams, and complex forms, this model leads directly to frame drops and memory leaks.With Angular 19+, fine-grained Signals provide a reactive paradigm where the framework tracks exact

JSON Schema Diff & Merge Tool: Free Browser-Based Tool

JSON Schema Diff &amp; Merge Tool: Free Browser-Based ToolCompare two JSON Schemas and instantly see what changed, or merge them into one unified schema. Why Another Schema Tool?JSON Schemas evolve constantly. Whether you're versioning your API contract, reviewing a PR, or consolidating multiple schemas, you need to see the diff clearly. Most online tools:Upload your schema to their server (privacy risk)Require signup or payment for full featuresDon't work offlineTrack your dataThis t

Actively exploited sandbox RCE in all Chromium versions

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GPT-6 Astra on OpenRouter

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Astro 7.3's Smallest New Feature Might Be the Most Useful One for Testing

Astro 7.3 shipped a few days ago. Most of the attention is probably going to the bigger stuff, but there's a one-line change in the CLI that I think is more useful day-to-day than it looks: astro preview finally got an --ignore-lock flag. Some background firstAstro 7.0 introduced a lockfile for astro dev — every time you start a dev server, Astro writes a small file recording its URL, port, and PID, specifically so AI coding agents don't accidentally spin up duplicate dev servers for the sa

A small experiment: building a zero-cost AI debate arena (BYOK)

I’ve been playing around with a simple idea lately: standard AI chat interfaces are way too polite, always agreeing with you, which gets boring pretty fast. I wanted to see what happens when you force two different models to actually argue with each other without the usual guardrails.So, I built a lightweight web arena using Tailwind, Vercel, and a BYOK (Bring Your Own Key) architecture so users plug in their own API keys (Gemini, Groq, etc.) and it doesn’t cost me a dime in server or token bill

The Small Rust Boundary That Makes Antigravity-Manager Feel Instant

I opened lbjlaq/Antigravity-Manager during a short coding break because the project had picked up 52 stars today. I expected another account utility with a thin desktop wrapper. Instead, I found a surprisingly clean split: React handles the interaction layer, while Rust sits behind Tauri as the privileged boundary for local account operations.That division matters. Account switching is not just a dropdown update. The application needs to read and change local state, coordinate with the Antigravi

I added scroll animations to three live pages — and silently corrupted two of them

What I was addingThree DHSeaDev project pages — Dota Companion, Annoying Dino, CaptureTools — were due for scroll animation. Nothing exotic: GSAP 3.12.5 plus ScrollTrigger, cards fading up as they enter the viewport, a screenshot strip that parallaxes on scroll. GSAP went fully free for every plugin at some point this year, which is the only reason this was worth doing at all.The site has no build step and no staging environment. Every page is a single WordPress Custom HTML block, and ever