Morning.dev

DEV Community • 2026-04-21 13:31

Hermes vs OpenClaw — Two Different Visions for AI Agents in 2026

If you've spent any time in the AI agent space lately, you've probably heard of both Hermes Agent and OpenClaw. One is the fast-rising Python agent from NousResearch with 107K+ GitHub stars. The other is the TypeScript-powered personal AI assistant with a staggering 361K stars and a lobster mascot that has taken GitHub by storm. But here's the thing — these two projects don't actually compete in ...

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6m read

DEV Community • 2026-04-21 13:30

Mistake 14/14: Not using the tools Playwright already gives you

This is the final mistake in the series. A lot of teams still debug failed tests the hard way: read the error add a console log re-run the suite repeat That works, but it is slow. Playwright already ships with tools that make debugging much easier: Trace Viewer Replay a failed run step by step and inspect DOM state, actions, network calls, and timing. npx playwright show-trace trace.zip...

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1m read

DEV Community • 2026-04-21 13:30

Stop Setting Up Databases for Things That Just Need to Remember Stuff

You're 45 minutes into building something fun with Cursor or Claude. The app is taking shape. Then your data needs to exist somewhere between page refreshes. And your brain immediately goes: do I really have to set up a database for this? You don't. The infrastructure trap Setting up persistence used to mean one of these: Spin up a Postgres instance Configure a Firebase project ...

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2m read

DEV Community • 2026-04-21 13:28

Your AI Agent Has Your API Keys (And So Does Every Other Agent)

Open your Claude Code settings.json. Look at the env blocks under your MCP servers. Every API key, every database token, every webhook URL you've put there — your agent has all of them, right now, in its process environment. That might sound obvious. You configured it that way. But think about what it actually means. You've got an MCP server for file operations and one for notifications. The not...

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9m read

How to Create a Zero Knowledge DApp: From Zero to Production, Case 2: zk P2P

DEV Community • 2026-04-21 13:26

How to Create a Zero Knowledge DApp: From Zero to Production, Case 2: zk P2P

Can a P2P on-ramp still work without a platform acting as escrow? In the world of crypto, the first thing a newcomer really has to do to enter the space is usually not trading and not doing DeFi, but completing an on-ramp first. And the on-ramp flow most people are familiar with is usually an OTC exchange on an exchange: the user sends fiat first, and after the platform confirms the pa...

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27m read

DEV Community • 2026-04-21 13:26

How to Create a Zero Knowledge DApp: From Zero to Production, Case 2: zk P2P

Can a P2P on-ramp still work without a platform acting as escrow? In the world of crypto, the first thing a newcomer really has to do to enter the space is usually not trading and not doing DeFi, but completing an on-ramp first. And the on-ramp flow most people are familiar with is usually an OTC exchange on an exchange: the user sends fiat first, and after the platform confirms the pa...

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27m read

DEV Community • 2026-04-21 13:24

Is ChatGPT citing your site? A conceptual guide to GEO tracking in Python published

When someone asks ChatGPT, Perplexity, or Gemini the same question, there is no rank. The model either mentions your site, paraphrases something from it, makes up a claim about it, or ignores it entirely. No dashboard tells you which happened. This is what people are starting to call GEO — Generative Engine Optimization. I've been building a tracker for it over the past several months, and I want...

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5m read

Hacker News: Front Page • 2026-04-21 13:24

Vera C. Rubin Observatory has Discovered 11,000 New Asteroids

Article URL: https://www.universetoday.com/articles/the-vera-c-rubin-observatory-has-discovered-11000-new-asteroids-and-its-barely-even-started Comments URL: https://news.ycombinator.com/item?id=47848487 Points: 7 # Comments: 0

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1m read

DEV Community • 2026-04-21 13:21

My First Attempt at Contributing to Firefox (Outreachy Journey)

🟢“From Confusion to Clarity: My Firefox Bug Fix Experience” “What Trying to Fix a Mozilla Bug Taught Me”🟡 Starting my journey into open source with Firefox has been both exciting and challenging. To be honest, outreachy project is not a 'TEA PARTY' Absolutely not!!!! When I began working on my first bug through Outreachy, I expected a straightforward process. Instead, I encountered a complex cod...

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2m read

Autonomous AI Agents Attack Surface 2026 — Security Risks of Agentic AI

DEV Community • 2026-04-21 13:21

Autonomous AI Agents Attack Surface 2026 — Security Risks of Agentic AI

📰 Originally published on SecurityElites — the canonical, fully-updated version of this article. The moment an LLM gets tool access, every vulnerability in the system becomes dramatically more dangerous. A prompt injection that makes a chatbot say something offensive is a content policy issue. The same injection against an AI agent that manages your email, accesses your file system, and calls...

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5m read

DEV Community • 2026-04-21 13:21

I scanned 1.27M DEV articles to find the books developers actually recommend.

I kept wishing for a data-driven book ranking for developers. "Top 10 Books Every Developer Should Read" articles all come down to one person's opinion. Some of them are paid posts. But I got curious. Out of the millions of articles on DEV.to — written by actual working developers — the books that lots of engineers mention have to be good ones, right? And wouldn't it be useful to see them sorted...

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5m read

DEV Community • 2026-04-21 13:19

The Three Silent Cloud-Cost Patterns We Find in Every Series A-C SaaS Audit

I read cloud bills, architecture diagrams, and CloudWatch dashboards for a living. Across 23 Series A-C SaaS environments last quarter — fintech, devtools, vertical SaaS, AWS and GCP — the same three patterns showed up every time. None of them are exotic. None require a migration. They're just the specific line items that grow in the shadow of a product roadmap and nobody has the time to look at. ...

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5m read

Lobsters • 2026-04-21 13:19

LixCon 2026

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1m read

DEV Community • 2026-04-21 13:19

CVE-2026-21520: Why Patching a Prompt Injection Doesn't Fix the Architecture

Microsoft patched CVE-2026-21520 on January 15, 2026. Three months later, the headline still ran: "The data exfiltrated anyway." That phrase deserves more attention than it's gotten. This isn't a story about a botched patch or a slow response. It's a story about a category of control — AI safety filters — being asked to do something they structurally cannot do. A governance-plane kill switch is ...

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9m read

Product Hunt — The best new products, every day • 2026-04-21 13:18

Clawdi

Best home for all AI agents Discussion | Link

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1m read

DEV Community • 2026-04-21 13:18

Why Debugging Is a More Important Skill Than Solving Algorithms

Most coding platforms train you to solve clean problems. You’re given a neat description. Clear inputs. Clear outputs. A well-defined goal. Real software development rarely looks like that. Instead, it looks like this: A job queue randomly stops processing. A rate limiter "works"... but never actually limits. A race condition only appears under load. There’s no tidy prompt. Just something b...

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3m read

DEV Community • 2026-04-21 13:18

I Added a Paragraph to My AI Character's System Prompt. She Invented a Different One.

I spent years in the gaming industry learning that characters are the reason people come back. Features rot. Graphics age. A character people can't stop thinking about outlasts every mechanic. Then I went to build an AI companion product and learned the same lesson the hard way — by writing a system prompt paragraph, watching the character invent something better instead, and having to delete my ...

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6m read

DEV Community • 2026-04-21 13:18

I replaced my boilerplate's setup wizard with a prompt

When someone clones a SaaS boilerplate, they spend the next 3 hours clicking through provider dashboards, dropping env vars into .env, and debugging why pnpm dev can't connect to their database. Every boilerplate I've used or shipped has tried to automate this away. They all failed in the same way. Here's what failed for me in the past: CLI wizards (pnpm setup). You answer 40 questions. Great on...

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4m read

Product Hunt — The best new products, every day • 2026-04-21 13:17

Reference Board

Infinite Canvas for your ideas Discussion | Link

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1m read

DEV Community • 2026-04-21 13:17

How I handle Claude API rate limits without losing user messages (with code)

How I handle Claude API rate limits without losing user messages (with code) Rate limits hit at the worst possible moment. Your user is mid-conversation, they send a message, and instead of a response they get a 529 error. Here's exactly how I handle this in SimplyLouie — a $2/month Claude wrapper with ~100 concurrent users. The problem Claude's API returns a few different ...

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4m read