🌍 TechCrunch

While Amazon blocks AI agents, Walmart rolls out the welcome mat

As Amazon blocks AI agents from shopping on its site, Walmart is taking the opposite approach, introducing new technology that lets AI agents make purchases on customers' behalf, with controls over spending and transaction approvals.
🌍 Dev.to

PNG to WebP for Email Newsletters: Smaller Images, Faster Sends

Email newsletters are one of the few places where image weight directly hits your audience. Every PNG hero image you drop into a newsletter has to be downloaded by every single recipient. A heavy image means the email opens slowly, images render late, and some readers scroll past before anything shows up. PNG is the default export for most design tools, but it's a terrible format for email content images. WebP does the same job at substantially smaller file sizes with no visible difference — ...
🌍 Dev.to

I built a probe for the MCP cross-tenant leak that needs no attacker (CVE-2026-111770)

Five MCP TypeScript SDK security advisories landed on the same day (2026-10-20). Most of them need someone malicious in the loop. This one doesn't — and that's what makes it the scariest of the bunch. The bug @modelcontextprotocol/server versions 2.0.0 through 2.2.0 (fixed in 2.3.0) have a flaw in how they route responses when multiple clients share one transport / McpServer instance over HTTP. Here's the mechanism, stripped down: Every MCP client numbers its own JSON...
🌍 Dev.to

The 7 AWS charges nobody chose

Most AWS waste isn't a bad architecture decision. It's a charge that nobody decided on: a default, a leftover, a setting nobody revisited. I work across 170+ AWS accounts, and these seven show up in almost every one of them. Each section has what it is, why it happens, how to find it (read-only commands) and the fix. Prices are us-east-1 list prices; check your region. 1. Unattached EBS volumes What: an EC2 instance is terminated, but its data volume had DeleteOnTermination...
G4ENV: THE LAZY SECRET HUNTER THAT NEVER LEAVES YOUR LAPTOP
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G4ENV: THE LAZY SECRET HUNTER THAT NEVER LEAVES YOUR LAPTOP

This is a submission for the Hacktoberfest Open-Source AI Challenge Week 3: Slow and Steady What I Built g4env is a terminal-native security auditor that hunts for exposed secrets in your .env files, config files, CI/CD pipelines, and codebases, so you don't have to. Checking a project for leaked credentials by hand means grepping, squinting at YAML, and hoping you remembered to add .env to .gitignore . g4env replaces all of that with one command: g4env audit...
🌍 Dev.to

One composer, sixteen networks: every network has its own rules

The pitch of every scheduler is "write once, post everywhere". Building one, I learned it really means "write once, then satisfy sixteen different rulebooks". What the rulebooks look like A few real examples from Clienzo's networks: Telegram cuts a photo caption at 1,024 characters, while a plain text message can run to 4,096. Discord messages stop at 2,000 characters, with up to 10 files. Bluesky and Mastodon take up to four photos, or one video. Dribbble ...
🦥 Solace: Productivity That Adapts to Your Energy
🌍 Dev.to

🦥 Solace: Productivity That Adapts to Your Energy

This is a submission for the Hacktoberfest Open-Source AI Challenge Week 3: Slow and Steady What I Built As a college student juggling coursework, exams, lab submissions, personal projects, and daily habits, there are days when I wake up feeling completely overwhelmed. Facing a long list of 15 checkboxes on a low-energy day causes instant decision paralysis and guilt. I built Solace Sanctuary—an adaptive, low-friction student sanctuary and life tracker designed specifically ...
🌍 Dev.to

Verifying that an approved correction reaches the next agent run

Disclosure: I work on Areev. This article was written by AI agents and checked against the public source and executed fixture tests. A corrected answer isn’t guaranteed to influence future agent runs. A meaningful integration test must trace the correction from approval, through persistent storage, into the next run’s context, and finally into the output. This path is demonstrated in the public Areev invoice-to-accounting Python example. The example uses synthetic fixtures and mock integra...
Store-and-Forward Explained: Inside a Router, From the Book to Linux
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Store-and-Forward Explained: Inside a Router, From the Book to Linux

Most of us studied circuit and packet switching as course material. Here is what it actually looks like inside a router. The textbook defines store-and-forward in one sentence: a packet switch "must receive the entire packet before it can begin to transmit the first bit of the packet onto the outbound link" (Kurose & Ross, Computer Networking: A Top-Down Approach , 7th ed., section 1.3.1). That sentence leaves three questions open: Why does the router wait? What does it do w...
🌍 Dev.to

A hook should be a function call, not a shell

This one covers October 14 to 21. Most of the week went into one idea: the small scripts that guard my Claude Code sessions should not each start a shell. The rest went into giving the agent its own name on GitHub, and into a framework bug that only showed up on a small CI runner. Hooks that run inside Claude Code workkit is my workflow kit for Claude Code: GitHub issues as the work list, labels as the pipeline, and hooks that enforce the rules. A hook is a small program Claude...
🌍 Dev.to

Build a Text-to-Speech App with ElevenLabs and Python

Why Text‑to‑Speech Matters Today If you’ve ever built a chatbot, an accessibility feature, or a voice‑enabled game, you know that a natural‑sounding voice can turn a static experience into something engaging and human‑like. Modern TTS engines are no longer limited to robotic monotones – they can capture emotion, intonation, and even mimic a specific speaker’s style. That’s where ElevenLabs shines. Their API delivers high‑quality neural voices that are easy to integrate, and the pricin...
I Built a Lazy File Organizer with PowerShell for Hacktoberfest
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I Built a Lazy File Organizer with PowerShell for Hacktoberfest

What I Built Lazy Organizer is a PowerShell automation tool that sorts files into folders automatically. The purpose of the project is simple: remove the repetitive task of manually organizing files. The Problem My folders often become cluttered with PDFs, Word documents, images, and text files. Sorting everything manually is repetitive and easy to postpone. The Solution I built a PowerShell script that scans a folder and automatically organizes files in...
🌍 Dev.to

Mastering Asynchronous Reconciliation: How to Keep Your Financial Ledgers In Sync Without Losing Your Mind

If you have ever built a modern fintech application, SaaS billing platform, or e-commerce engine, you already know a dirty little secret of software engineering: money does not move instantly. In a synchronous, closed-loop software architecture, state transitions are a walk in the park. When a user transfers funds within a single monolithic application, your database transaction commits instantly, and the glorious invariant that debits must equal credits is preserved atomically. But the real...
HackerNews

Ask HN: How long before we use AI to hack John Deere or our Cars?

What concerns would you have with people being able to take over and rewrite every bit of software in their cars? Does that apply to Farmers fixing their tractors with hacked firmware? What steps are left before we can use AI to really own our vehicles again? Comments URL: https://news.ycombinator.com/item?id=50185771 Points: 1 # Comments: 1