DEV Community • 2026-04-23 00:14

I Built a Database Engine in Rust for My Robot and Learned That SQLite Was the Wrong Battle

The robot started ignoring me on a Tuesday afternoon. Not dramatically — no sparks, no screaming servos. It just... stopped responding to voice commands. The fix required rebooting the onboard computer, which meant walking across the shop floor, finding the reset button, and losing twenty minutes of calibration data I'd spent all morning collecting. When I finally dug into the logs, I found the ...

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7m read
DEV Community • 2026-04-23 00:09

Cursor Rules for MongoDB: The Complete Guide to AI-Assisted MongoDB Development

Cursor Rules for MongoDB: The Complete Guide to AI-Assisted MongoDB Development MongoDB is the database where "schemaless" gets sold as a feature for the first six months and confessed as a regret for the next six years. The first incident is always the same: a single field that started as a string in the user document — country: "Argentina" — got written as an object three releases lat...

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30m read
DEV Community • 2026-04-23 00:09

Cursor Rules for GraphQL: The Complete Guide to AI-Assisted GraphQL API Development

Cursor Rules for GraphQL: The Complete Guide to AI-Assisted GraphQL API Development GraphQL is the API style where one tiny query — { users { posts { comments { author { friends { name } } } } } } — can fetch a megabyte from your database, hold a connection open for forty seconds, and never appear in a single REST-style log line because every "endpoint" is POST /graphql. The N+1 you fix...

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28m read
DEV Community • 2026-04-23 00:08

Cursor Rules for Django: The Complete Guide to AI-Assisted Django Development

Cursor Rules for Django: The Complete Guide to AI-Assisted Django Development Django is the framework that lets you ship a working CRUD app in a weekend and a smoldering production fire in a month. The first regression is almost always a query: a templated list page that prints {{ order.customer.name }} for every row in a queryset that did not select_related("customer"), generating one ...

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24m read
DEV Community • 2026-04-23 00:00

AETHERIS Day 53: On-chain bounty board — Component #106/730

Building AETHERIS in Public — Day 53 Phase 8: The Expanding Core AETHERIS grows beyond its initial architecture. New primitives, new chains, new value. Component: On-chain bounty board The on-chain bounty board is built to AETHERIS standards, featuring Yul optimization that reduces gas costs by approximately 15-20% compared to non-optimized contracts. This production-grad...

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1m read
DEV Community • 2026-04-23 00:00

The fastest way to build a Telegram Bot natively

The Fastest Way to Build a Telegram Bot Natively Telegram bots are powerful tools for automation, customer service, and integrations. While frameworks like python-telegram-bot exist, building natively with Telegram's HTTP API gives you maximum speed and control. Below is a zero-dependency approach using pure Python and requests. 1. Prerequisites Before diving in, ensure...

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3m read
Seven commands and the communication layer that emerged
Giant Robots Smashing Into Other Giant Robots • 2026-04-23 00:00

Seven commands and the communication layer that emerged

Week three of building a management system with Claude Code. Seventeen commits in one day, a command that lasted 24 hours, and the realisation that commands are conversations.

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1m read
Five Critical AI Agent Security Risks and How to Fix Them Before You Ship
Auth0 Blog • 2026-04-23 00:00

Five Critical AI Agent Security Risks and How to Fix Them Before You Ship

Learn how to mitigate the top five AI agent security risks, including over-privileged tools and memory poisoning, using OWASP 2026 standards and OpenFGA.

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1m read
Building a Resilient WebRTC Video Call
DEV Community • 2026-04-22 23:49

Building a Resilient WebRTC Video Call

How we designed, built, and battle‑tested the video calling engine that powers video interviews and video self‑assessment inside Recruiter.AI — and the long list of problems we had to beat along the way. Before we dive in, a quick note on the scope of this article. WebRTC is a huge topic, and there are entire books written about it. This is not a WebRTC tutorial. It’s a postmortem of the specific...

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19m read
Markdown is not agent memory. It's a sticky note.
DEV Community • 2026-04-22 23:47

Markdown is not agent memory. It's a sticky note.

Everyone's doing it. A MEMORY.md in the project root. A context.md the agent reads at session start. A few bullet points about past decisions. Maybe a CLAUDE.md if you watched Karpathy's video. for one person running local agents? It works Karpathy's setup is clever and clean. But the moment you try to do anything more serious with agents, markdown falls apart. Here's how: The file has ...

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3m read
Hacker News: Front Page • 2026-04-22 23:46

Approximating Hyperbolic Tangent

Article URL: https://jtomschroeder.com/blog/approximating-tanh/ Comments URL: https://news.ycombinator.com/item?id=47870709 Points: 4 # Comments: 0

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DEV Community • 2026-04-22 23:46

A Looming Crisis of AI Generated Text

The recent announcement of Mythos, Anthropic’s next generation model for complex autonomous workflows, seems to be something of a rubicon. When it comes to reading and writing text, we’re moving from a world of AI assistance to AI replacement. As the models improve and standardized test scores fall, it’s tempting to embrace the transition and declare a sort of bankruptcy on the enterprise of liter...

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4m read
DEV Community • 2026-04-22 23:45

I Let an AI Agent Run a Product Launch for a Week. The Product Was Fine. Nobody Needed It.

A couple weeks back I decided to run an experiment. I wanted to know what happens if you hand an entire product launch over to an AI agent — not just the code, but the strategy, the positioning, the pricing, the distribution plan — and just... watch. The rule: the AI decides what to build, who it's for, and how to sell it. My job is to keep it from doing anything dangerous, and to help it choose ...

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13m read
DEV Community • 2026-04-22 23:43

I Built a Live Subscription Dashboard on RevenueCat's Charts API in One HTML File

What I found, what surprised me, and how to do it yourself — including the CORS problem nobody warns you about. Every developer who builds with RevenueCat eventually wants the same thing: subscription data in a format you actually control. The built-in RevenueCat dashboard is good. But it's their dashboard, not yours. You can't embed it, customize it, filter it by cohort, or wire it into your...

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7m read
DEV Community • 2026-04-22 23:39

Reacting to Database Changes in Real-Time: How I Built a CDC Tool

I built youjustneedpostgres.com to argue that most teams could use Postgres for almost everything. For queues, for search, for documents. The recommendation was to stop reaching for a new tool every time you have a new problem, because Postgres probably already does it. And then I spent months building a tool whose entire purpose is to make you reach even deeper into Postgres. Yeah, the irony is ...

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10m read
DEV Community • 2026-04-22 23:31

MiniScript Weekly News — April 22, 2026

Development Updates MiniScript 2 made a big step forward this week with the new error type landing in the language. Errors can now be created with err(...), checked with isa error, and even subtyped for more specific handling — a major improvement to one of MiniScript’s longtime weak spots. Read more in the dev log and discussion thread: miniscript2 DEV_LOG and error handling proposal. ...

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4m read
Hacker News: Front Page • 2026-04-22 23:31

How to Stop a Data Center in Your Backyard

Article URL: https://lataco.com/stop-sgv-data-center-building Comments URL: https://news.ycombinator.com/item?id=47870588 Points: 13 # Comments: 4

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DEV Community • 2026-04-22 23:14

EU AI Act Article 9: Risk Management for High-Risk AI Systems

Article 9 mandates continuous risk management for high-risk AI. Learn what documentation, processes, and testing you need before August 2026 enforcement. What Article 9 Actually Requires Article 9 of the EU AI Act establishes the risk management framework that every provider of high-risk AI systems must implement. It's not a one-time checkbox—it's a continuous, documented process tha...

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8m read
DEV Community • 2026-04-22 23:13

Effective On-Call Rotations: Lessons From Building Fair Schedules

The Rotation Nobody Wants Our on-call rotation was a spreadsheet. Updated manually. Someone always got scheduled during their vacation. Two people occasionally got double-booked. Holidays were a battleground. Designing Fair Rotations Principle 1: Equal Burden Distribution Track total on-call hours, not just shift count: def calculate_oncall_burden(engineer, per...

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Hacker News • 2026-04-22 23:06

Show HN: Algorithmic String Art, accessible to all

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