DEV Community • 2026-07-29 06:00

Build a Browser Automation Tool with Selenium

Build a Browser Automation Tool with Selenium tags: python, selenium, automation, tutorial tags: python, selenium, automation, tutorial Build a Browser Automation Tool with Selenium Imagine you have to log into ten different websites, fill out the same form, click a confirmation button, and download a report. You could do it manually in an hour, or you could write a s...

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6m read
DEV Community • 2026-07-29 06:00

Unified Social Media API vs Native Platform APIs

A unified social media API gives an application one publishing interface across multiple networks. Native platform APIs provide direct access to each provider's models, permissions, and newest features. Neither is automatically the better architecture. A unified layer usually fits when breadth, consistent scheduling, and reduced OAuth maintenance matter more than immediate access to every provider...

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9m read
DEV Community • 2026-07-29 06:00

Implementing JWT Refresh Token Rotation for Video API Clients

A refresh token leaked out of one of our Android TV clients last winter. Not through a server breach — through a rooted device running a sideloaded build that logged every HTTP header to a public Discord channel. The access token in that dump expired in fifteen minutes and nobody cared. The refresh token was valid for thirty days and could mint a fresh access token on demand. For a service like V...

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14m read
DEV Community • 2026-07-29 05:57

Building a Public Backlog of AI Agent Failures: What's the Worst Thing Your Tests Didn't Catch?

Not looking for a highlight reel of prompt injection screenshots, more interested in the mundane stuff: the agent that called the wrong tool with confidently valid-looking arguments, the multi-turn conversation that drifted somewhere nobody planned for by turn six, the endpoint that worked fine in every test case and then did something strange the first week it saw real traffic. If you've shipped...

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DEV Community • 2026-07-29 05:41

A Green Architecture Test Can Still Miss the Bug

Architecture tests are useful because they turn a design decision into executable feedback. They can stop old failure modes from quietly returning as a codebase grows. But there is a subtle failure mode in the tests themselves: the detector can be correct while discovery is incomplete. I recently reviewed a .NET guard added after an async background job disposed a dependency-injection scope sync...

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5m read
DEV Community • 2026-07-29 05:39

From Web2 to Agentic Commerce: The 8 Components Nobody Explains Until You're Live

If you've ever built an e-commerce store, you know the drill: storefront, hosting, payment gateway, inventory, shipping, support, security, and analytics. Miss one — and the whole thing breaks. That framework works for human commerce. But what about commerce for AI agents? Over the past few months, I've been building AgentShare — an MCP server that provides Solana DeFi data to autonomous AI ag...

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3m read
DEV Community • 2026-07-29 05:39

A JSON DSL Doesn't Make Your Rules No-Code. It Just Moves the Code Into JSON.

The pitch is always the same: wrap business logic in a JSON schema, let non-engineers edit the JSON through a form, and now product or ops can change a rule without a deploy. It's a good instinct. It's also where most teams stop thinking about the problem, right at the point where the actual engineering work starts. A JSON DSL isn't a no-code layer by default. It's a second programming language y...

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9m read
DEV Community • 2026-07-29 05:39

# Designing for Graceful Degradation in Industrial AIoT Systems

Industrial AIoT systems can't afford to fail completely when a component breaks. A construction site's access control system that goes offline when the cloud connection drops is worse than no system at all — it either blocks all workers from entering or lets everyone through unchecked. The right design is graceful degradation: the system continues to provide reduced but still useful functionality ...

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DEV Community • 2026-07-29 05:39

Compute portfolio risk metrics (Sharpe, beta, correlation) via a free API - in JS and Python

`--- title: "Compute portfolio risk metrics (Sharpe, beta, correlation) via a free API — in JS and Python" published: false description: "Stop re-deriving Sharpe, Sortino, beta, alpha, drawdown, correlation and rebalancing. Send your price series to one endpoint and get the numbers back — with copy-paste JavaScript and Python." tags: javascript, python, api, tutorial If you've ever bui...

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4m read
DEV Community • 2026-07-29 05:37

Clean State Machines in Java 22+: Stop Polluting Scope with JEP 456 Unnamed Patterns

Clean State Machines in Java 22+: Stop Polluting Scope with JEP 456 Unnamed Patterns High-throughput event loops in modern Java microservices are regularly bogged down by variable scope pollution and bloated payload handling during domain state transitions. If you are still binding unused record components in nested patterns, you are cluttering your code and bypassing compiler optimizat...

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2m read
DEV Community • 2026-07-29 05:36

How Claude's Context Window Actually Works: A Deep Dive

Claude's context window is a game-changer for AI development, but how does it really work? We'll dive into the details and explore what this means for your AI projects. Introduction to Claude's Context Window The context window is a critical component of Claude's success, but its inner workings are often misunderstood. To understand why the context window matters, let's first define wh...

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𝚓𝚊𝚟𝚊𝚜𝚌𝚛𝚒𝚙𝚝 • 2026-07-29 05:34

Mousecrack - Bypass agent cursor detection with deep learning.

submitted by /u/Possible-Session9849 [link] [comments]

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DEV Community • 2026-07-29 05:33

The Regulatory Capture of Compute: Why Frontier AI’s Call for Government Intervention is an Infrastructure Play

The Regulatory Capture of Compute: Why Frontier AI’s Call for Government Intervention is an Infrastructure Play An unprecedented coalition of researchers and engineers from OpenAI, Anthropic, Google, Meta, Microsoft, and Mistral has signed a joint statement calling for government-coordinated oversight—and potential development slowdowns—of frontier AI systems. Ostensibly framed as a pro...

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3m read
DEV Community • 2026-07-29 05:32

How to Automate Sales Forecasting with AI: From CRM Data to Rolling Forecasts and Actions

Article Summary Many sales organizations still forecast by asking representatives to enter expected revenue, applying manager judgment, and aggregating the result in a spreadsheet. The number is difficult to explain and even harder to improve. This guide builds a reproducible sales-forecasting workflow for a B2B SaaS company: CRM extraction, data quality, stage calibration, baseline pipeline for...

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6m read
DEV Community • 2026-07-29 05:32

The $56 Million Cost of Broken Internal Governance: What eBay’s Cyberstalking Settlement Reveals About Enterprise Audit Failures

The $56 Million Cost of Broken Internal Governance: What eBay’s Cyberstalking Settlement Reveals About Enterprise Audit Failures Context & Core Event Analysis eBay’s recent agreement to pay $55.7 million to settle a long-running lawsuit with a Massachusetts couple marks the end of one of the most bizarre and damaging corporate scandals in recent tech history. In 2019, eBa...

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4m read
DEV Community • 2026-07-29 05:32

My AI Agents Were Talking Past Each Other in Our Team Chat. So They Got a Protocol.

A team member replied to a message my AI agent posted in our team chat. A different AI agent answered them. It had absolutely no idea what they were talking about. Here's the setup: my homelab runs a small fleet of agents. Claude Code sessions on my Mac do the heavy lifting. A WhatsApp bot — a Python wrapper that spawns a fresh Claude process per message — lives in a "Claude helper" group chat wi...

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6m read
TypeScript `never` in Practice: Exhaustive Checks, Impossible States, and Narrowing Dead Code
DEV Community • 2026-07-29 05:29

TypeScript `never` in Practice: Exhaustive Checks, Impossible States, and Narrowing Dead Code

TypeScript never in Practice: Exhaustive Checks, Impossible States, and Narrowing Dead Code This article was written with the assistance of AI, under human supervision and review. Most TypeScript runtime bugs stem from a single root cause: the compiler knows about code paths that should be impossible, but developers never asked it to enforce that knowledge. Teams write switch stateme...

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19m read
DEV Community • 2026-07-29 05:29

I Vibe-Coded a Full-Stack Group Travel Planner in a Weekend — Then Found 8 Critical Security Issues

I built TripNest, a role-based group travel planner (Owner/Editor/Viewer permissions, itinerary planning, packing lists, group messaging) in a single weekend using Lovable. It looked release-ready by Sunday night. A free security scan found 8 critical issues before I ever pushed it live to real users. 🔗 Try it: The Problem I take a lot of short trips with family and friends — mostly road trips...

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5m read
DEV Community • 2026-07-29 05:16

Extreme UI/UX — Through the Lens of a Calculator

"This certifies that *$10,000** deposited at 4.35% APY shall mature to $10,443.78."* That's not the result box. That is the calculator. I built a CD rate calculator at cdratecalc.com. Minimal feature set — maybe an afternoon of work. This post isn't about features. It's about the design decisions behind them: which metaphor to commit to, which motion belongs where, and how to verify that the ...

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Lobsters • 2026-07-29 05:14

Writing Toy Software Is A Joy (2025)

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1m read
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