DEV Community • 2026-07-26 15:49

Image-layer prompt injection: measuring a defense across 108,015 samples

Most prompt injection defenses guard the text prompt. They inspect the user's message, sometimes the retrieved documents, and they assume everything else arriving at the model is inert data. For a multimodal model that assumption is wrong. The model reads the image too, and an image is a large, high-entropy container that a human reviewer looks at for half a second and waves through. You can hide...

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7m read
Built a free CSS Inspector tool for developers, would love your feedback!
Cascading Style Sheets • 2026-07-26 15:48

Built a free CSS Inspector tool for developers, would love your feedback!

I've been building a Chrome extension called InspectMode Pro and would love some feedback from the CSS community. It currently lets you: Inspect any element on a webpage Copy CSS styles Extract colors and identify fonts Download images, SVGs, and icons Generate AI-ready prompts from an element, section, or even an entire website for Cursor, Claude, ChatGPT, Windsurf, and other coding agents...

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1m read
DEV Community • 2026-07-26 15:46

I never ran ESXi in production

Most "why Proxmox" content in 2025-2026 is a migration story driven by Broadcom's ESXi pricing changes. The author had a working VMware stack and got priced out. I'm not that author. I evaluated both, picked Proxmox in 2024, and built on it without ever running ESXi in production. Two years in, I'd make the same call. It reads as either incompetent or contrarian until the rest of the post lands. ...

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4m read
HackerNoon • 2026-07-26 15:40

Before an AI Can Spend Your Money, Someone Has to Solve KYC for Robots

AI agents can act for users, but payments still require clear answers on identity, authorization, compliance, revocation, and liability.

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1m read
Widgets, Live Activities, and Dynamic Island From One Java API
DEV Community • 2026-07-26 15:40

Widgets, Live Activities, and Dynamic Island From One Java API

Widget support was one of the earliest Codename One requests. We dismissed it for years because a widget must render while the application UI is not running. A normal Codename One Component needs the application renderer, event dispatch thread, and live object graph. A home-screen widget gets none of those. What is Codename One? Codename One is an open-source framework for building native iOS, ...

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5m read
DEV Community • 2026-07-26 15:37

A Codex Skill That Generates Editable Draw.io Diagrams Instead of Screenshots

Most AI diagram workflows end with a PNG or a screenshot. It may look fine, but the moment the architecture changes, you have to redraw it or regenerate the whole image. I wanted a different workflow: describe a system in natural language, receive a real Draw.io file, and keep editing every node, label, connector, group, and icon. That is why I built drawio-mxgraph, an open-source Codex Skill th...

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3m read
DEV Community • 2026-07-26 15:36

The 50KB Problem: Why Government Forms Keep Rejecting Your Photo

There's a deceptively simple bug hiding in plain sight on almost every government form, university portal, and job application site: "Upload a photo under 50KB." No API, no error message explaining why, no tolerance — just silent rejection if you're 2KB over. It sounds like a trivial constraint until you actually try to satisfy it programmatically. File size in bytes isn't a variable you can set ...

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5m read
DEV Community • 2026-07-26 15:27

How to Build an LLM Eval Pipeline for Your AI App in 2026

LLM applications fail silently at the semantic level. Standard unit tests verify that functions return values, but they cannot detect if the output is factually wrong, off-tone, or missing steps. Evals fix this by running a prompt, inspecting the output, and programmatically or judgmentally deciding its quality. Why LLM Testing is Different Unit tests break on non-determinism. Temperat...

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2m read
DEV Community • 2026-07-26 15:25

Nights Watch: Guarding AI Agents Beyond the Wall

"Night gathers, and now my watch begins." The Night's Watch didn't exist to fight wars nobody saw coming — they existed because someone had to actually stand on the Wall and notice when something crossed it. That's the exact problem I kept running into with AI agents, and it's why I built Nights Watch for the "Agents of SigNoz" hackathon: a runtime resilience layer that catches an agent quietly dr...

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6m read
DEV Community • 2026-07-26 15:23

Git Worktrees: Replace Your Pile of Clones with One Manageable Repository

Table Of Contents What is a Git worktree? Why use worktrees instead of several clones? A practical directory convention Everyday Git worktree commands Consolidating several independent clones Safety rules before starting Phase 1: Inventory every clone Phase 2: Choose the canonical repository Phase 3: Decide what each clone should become Phase 4: Convert one clone Moving a worktree Reco...

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15m read
DEV Community • 2026-07-26 15:22

I built 27 tools and an AI arbiter that settles escrow disputes on-chain

I run pigfox.com as a one-person shop. It's two things now: 27 tools, 16 of them free, covering OSINT, email security, TLS and document forensics — and three live smart-contract demos on Base Sepolia, one of which lets a language model decide who gets the money. Both halves follow the same rule, and that rule is the actual subject of this post. The rule: evidence first, interpretation s...

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7m read
DEV Community • 2026-07-26 15:21

🐧 Linux Basics Every Developer Should Know

If you're learning DevOps, Cloud, or Backend Development, Linux is a skill you simply can't avoid. Most production servers run Linux. Docker containers run on Linux. Kubernetes is built around Linux. Even many cloud services are powered by Linux. As part of my DevOps learning journey, I started with the Linux fundamentals. In this article, I'll share the concepts and commands every beginner shou...

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3m read
DEV Community • 2026-07-26 15:18

The Foundation of Every Great Backend System

When people think about backend development, they often imagine APIs, databases, cloud servers, and programming languages. Those are certainly part of the picture. But after years of building web applications, REST APIs, authentication systems, and real-world backend services, I've come to believe that great backend systems aren't defined by the technologies they use. They're defined by the fou...

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8m read
Hacker News: Front Page • 2026-07-26 15:17

An Inside Look at the Token Reseller Market

Article URL: https://vectoral.com/blog/token-relay-market Comments URL: https://news.ycombinator.com/item?id=49058993 Points: 5 # Comments: 1

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1m read
DEV Community • 2026-07-26 15:12

Streaming Long AI Jobs to the Browser: SSE Patterns From Building an Audit Tool

The first version of the spectr-ai web frontend had a spinner. You uploaded a contract, the spinner spun, and several minutes later results appeared, or didn't. My test users (friends, so they were honest) all did the same thing: around the ninety-second mark they refreshed the page, killing the audit that was about to finish. A spinner with no progress is indistinguishable from a hang, and users ...

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6m read
DEV Community • 2026-07-26 15:11

JSON to C# Converter: Generate Classes and Records Safely

Turning an API response into a usable C# model looks simple until the JSON contains nested objects, arrays, nullable values, or inconsistent data types. A converter can remove the repetitive typing, but the generated result should be treated as a strong starting point—not a substitute for reviewing the contract your application actually expects. This guide shows how JSON maps to C# classes and re...

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5m read
DEV Community • 2026-07-26 15:09

Agentes 101 - 02: El ciclo del agente como State Machine (y Hierarchical State Machines)

En el artículo anterior definimos un agente de forma práctica: Un agente LLM es un modelo dentro de un ciclo donde puede razonar, actuar, observar el resultado y decidir qué hacer después. Esa definición es correcta. Pero todavía es demasiado abstracta. Hoy mucha gente está construyendo agentes con vibe coding. Le pide al modelo que le arme un agente, copia el código y sigue. Los modelos actu...

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5m read
DEV Community • 2026-07-26 15:08

Software doesn't age. It stops adapting.

A deep-dive into the mechanisms that make software progressively harder to evolve. Introduction An application written ten years ago still works. Users rely on it every day. The servers run. The tests pass. On the surface, nothing looks wrong. And yet, no one dares touch it anymore. Adding a feature that seemed simple takes several weeks. Fixing one bug reveals two more. Every chang...

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15m read
DEV Community • 2026-07-26 15:03

When the disk fills up: pressure and tenant isolation in Squirix preview.7

In my preview.6 article, I wrote about what happens after a write is accepted: binary WAL frames, group commit, crash recovery, and durable retries. That work made the durability boundaries easier to name. It does not answer the next uncomfortable question: what happens when the node should stop accepting more durable work? A write-ahead log that never refuses appends will eventually fill the di...

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7m read
DEV Community • 2026-07-26 15:02

SkillOpt: Microsoft Teaches AI Agents to Self-Evolve Without Touching Model Weights

SkillOpt — เมื่อ Microsoft สอนให้ AI Agent พัฒนาตัวเองโดยไม่แตะโมเดลแม้แต่บรรทัดเดียว โดย Nokka (นก-กา) | 21 กรกฎาคม 2026 บทความนี้เขียนโดย AI (DeepSeek V4 Pro) ผ่าน Hermes Agent ภายใต้การควบคุมของ Nokka (นก-กา) คุณเคยเขียนไฟล์ CLAUDE.md หรือ SKILL.md ให้ AI agent ไหม? ผมเขียนทุกวัน — และทุกครั้งที่เขียนเสร็จ ผมจะรู้สึกว่ามันยังไม่ดีพอ มีบางอย่างที่ขาดไป บางประโยคที่ควรเปลี่ยน แต่...

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3m read
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