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Product Hunt — The best new products, every day • 2026-04-21 17:10

OneGlanse

Free open-source GEO tracker for LLM visibility Discussion | Link

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Hacker News: Front Page • 2026-04-21 17:01

Trellis AI (YC W24) Is hiring engineers to build self-improving agents

Article URL: https://www.ycombinator.com/companies/trellis-ai/jobs/SvzJaTH-member-of-technical-staff-product-engineering-full-time Comments URL: https://news.ycombinator.com/item?id=47851456 Points: 0 # Comments: 0

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DEV Community • 2026-04-21 17:01

We're building Google for AI Agents

Humans needed Google. AI agents need the same. The problem In the early days of the web, information existed — but finding it was chaos. Yahoo built a directory. People browsed categories. It worked, until it didn't. Then content exploded. Yahoo couldn't keep up. A new problem emerged: not just finding pages, but knowing which ones were worth your time. Google solved it with PageR...

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DEV Community • 2026-04-21 17:00

PostgreSQL Design at Scale: Normalization vs JSONB (A Real-World Guide)

When you start building an app, everyone gives the same advice: “Normalize your database.” And they’re right… at the beginning. But once your app starts scaling? That same “clean design” can become your biggest bottleneck. This is where denormalization (especially JSONB in PostgreSQL) becomes a powerful tool. Let’s break this down with a real-world example. Table of Contents ...

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The Backyard Quarry, Part 6: Scaling the Quarry
DEV Community • 2026-04-21 16:59

The Backyard Quarry, Part 6: Scaling the Quarry

So far, the Backyard Quarry system has worked well. We have: a schema a capture process stored assets searchable data digital twins For a small dataset, everything feels manageable. A few rocks here and there. A handful of records. It’s easy to reason about the system. When the Dataset Grows The moment the dataset starts to grow, the assumptions change. Instead of a ...

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Building MCP Servers for Genealogy: AI-Powered Historical Research
DEV Community • 2026-04-21 16:58

Building MCP Servers for Genealogy: AI-Powered Historical Research

For years now, I’ve been writing a book tracing four family branches across Europe, the Middle East, and South Africa. One thread follows Louis Rau, my 3rd great-uncle, who was president of Compagnie Continentale Edison (CCE) in the early 1900s. He was an Edison Pioneer, part of the inner circle that brought Edison's electrical systems to Europe. Last year, I found that Thomas Edison's papers wer...

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From Monolith to Microservices: An Honest Story of Architectural Failure and Its Correction
DEV Community • 2026-04-21 16:54

From Monolith to Microservices: An Honest Story of Architectural Failure and Its Correction

It's a story about ambition, miscalculation, and ultimately, a hard-won redemption. When I first embarked on this venture, the world of software architecture seemed like a fortress I could easily conquer. I dreamt of building something monolithic, a single, powerful entity that would stand tall and unyielding against the tides of change. My vision was one of immense scale and centralized control, ...

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DEV Community • 2026-04-21 16:54

CTEs, Subqueries, and Query Optimisation in SQL

If you have been writing SQL for a while, you have almost certainly run into a moment where a query starts to feel unwieldy. You need to filter based on an aggregation, or you need to reference a result you just computed, and suddenly your query is nested three levels deep and impossible to read. That is where CTEs and subqueries come in. Both solve the same core problem: referencing intermediate ...

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DEV Community • 2026-04-21 16:54

I Was Tired of Opening 20 Tabs While Learning… So I Fixed It

I Was Tired of Opening 20 Tabs While Learning… So I Fixed It If you're a developer or student, you’ve probably experienced this: 5 YouTube videos open 3 blog articles 2 documentation pages Notes somewhere else And still… confusion I was doing the same. Every time I tried to learn something new — React, APIs, System Design — my browser looked like chaos. And the worst part? 👉 I wasn’t actua...

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Agentic AI’s Token Debt: Why Multi-Step Tool Chains Blow Up Your Context Window And How Semantic Distillation Fixes the O(N ) Problem
DEV Community • 2026-04-21 16:52

Agentic AI’s Token Debt: Why Multi-Step Tool Chains Blow Up Your Context Window And How Semantic Distillation Fixes the O(N ) Problem

The Cost Problem Nobody Warned You About Agentic AI is the hottest architectural pattern of 2026. Frameworks like LangChain, AutoGen, and CrewAI let LLM agents orchestrate multi-step workflows — calling APIs, querying databases, executing code, and chaining tool outputs to solve complex tasks. I’ve been building data integration pipelines for 18 years, so when agentic workflows started connecting...

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Pure Reducers in Kotlin: Why Your Android Unit Tests Should Run in 5 Milliseconds
DEV Community • 2026-04-21 16:51

Pure Reducers in Kotlin: Why Your Android Unit Tests Should Run in 5 Milliseconds

Reducer unit tests clear in about five milliseconds each, with no dispatcher setup, no MockK, no Turbine, and no ViewModel. That speed is not a micro-optimization — it reshapes the test pyramid, moves 80% of Android presentation tests to pure JUnit, and keeps the feedback loop under a second on a laptop. This article walks through the Kotlin contract that makes the five-millisecond figure possib...

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The Android Testing Pyramid That Strict MVI Unlocks
DEV Community • 2026-04-21 16:50

The Android Testing Pyramid That Strict MVI Unlocks

80% of your presentation tests live in the reducer tier and run in 5ms. The other four tiers exist, but they are narrow on purpose — device-bound work is the rarest thing the pyramid measures. Strict MVI is what makes that shape possible in the first place. Five tiers at a glance The shape is fixed: a wide reducer base, a thinner middleware band, a narrow store-integration strip, a...

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10 MVI Anti-Patterns Senior Android Reviewers Reject on Sight
DEV Community • 2026-04-21 16:50

10 MVI Anti-Patterns Senior Android Reviewers Reject on Sight

Strict MVI on Android fails in the same ten ways in every codebase. This article is the pocket cheat sheet senior reviewers keep open during a pull-request pass. Each entry is a smell, a bad snippet, a good snippet, and one sentence explaining why it blocks the PR. The ten # Anti-pattern Root cause 1 The God Intent Reducer authority dissolved 2 Fat State State shape sprawlin...

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The Strict-MVI Playbook: How Staff Android Engineers Structure Jetpack Compose at Scale
DEV Community • 2026-04-21 16:50

The Strict-MVI Playbook: How Staff Android Engineers Structure Jetpack Compose at Scale

A strict-MVI feature exposes exactly one public entry point, send(intent), and one observable output, StateFlow<State>. Everything else — reducer, middlewares, channels, cancellation keys — is an implementation detail negotiated behind that contract. This playbook is the staff-level brief on how to make that choice survive the tenth engineer, the fiftieth screen, and the fourth rewrite. ...

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Prompting for Structure: How to Write AI Prompts That Don't Create Architectural Debt
DEV Community • 2026-04-21 16:50

Prompting for Structure: How to Write AI Prompts That Don't Create Architectural Debt

Post 1 showed the mess. Here's the fix. The loyalty points example ended with a constrained prompt one paragraph that told the AI exactly which file, exactly which layer, exactly what wasn't allowed. The AI produced a clean domain object on the first try. No drift, no boundary violations, no cleanup. That wasn't luck. It was a pattern. This post is about making that pattern repeatable. ...

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DEV Community • 2026-04-21 16:48

Create Your Own LLVM Pass as a Plugin (Step-by-Step Guide)

f you're getting into compilers or exploring LLVM internals, one of the most powerful things you can learn is how to build your own LLVM Pass. I’ve put together a hands-on guide that walks you through creating an LLVM pass as a plugin — something that’s actually used in real-world compiler workflows. 💡 What You’ll Learn How LLVM passes work internally How to create a custom pass from scratch How...

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DEV Community • 2026-04-21 16:45

Why is Claude Mythos good at Cyber Security?

Introduction Regarding the latest model announced by Anthropic, "Claude Mythos," the CEO of Anthropic has explicitly stated that it was "created to specialize in programming." However, one of the fields where Claude Mythos is currently receiving the highest praise in the market is actually "cybersecurity." 💻 The True Nature of Programming is "Logical Thinking" In the first place, programming is n...

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HackerNoon • 2026-04-21 16:45

THE RISE OF THE SECONDARY GAMING MARKET: WHEN VIRTUAL ACCOUNTS BECOME REAL ASSETS

In the booming digital economy of 2026, spending tens of thousands of dollars on a video game account is no longer seen as "extravagance." On the contrary, it is becoming a calculated investment strategy within a multi-billion dollar market.

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DEV Community • 2026-04-21 16:40

What Investors Don't Ask Founders (And Why They Should)

When a founder walks into a pitch meeting, they're rehearsed. The deck is polished. The metrics are (hopefully) real. But investors still get blindsided. Theranos, WeWork, FTX—all had charismatic founders with compelling narratives. All committed fraud or catastrophic governance failures. And in every case, the warning signs were psychological, not financial. The Problem: Traditional ...

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DEV Community • 2026-04-21 16:40

Post-Quantum Blockchain Meets AI with 14 Brain Regions – Built by One Developer

Two separate projects, now converging. Project 1 — Uracil Chain A blockchain built from scratch in Rust with: Falcon post-quantum signatures (most chains use ECDSA which quantum computers will eventually break) Serial-based asset tracking — every token unit has a forensic history Four consensus mechanisms: PoW, PoS, PoAuth, and Proof of Useful Work via ZK protein folding Dual chai...

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