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DEV Community · Technology

How I Built a Profitable FreqAI Plugin Using Institutional ML Techniques

The Problem with Default FreqAI Standard FreqAI trains a regressor on raw future returns. You predict "price goes up 0.5% in the next 4 hours" and threshold it into buy/sell signals. This approach has three fatal flaws: 1. Labels don't match real trades. A fixed-horizon return of +0.3%...

Stefano viana 1 day ago

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DEV Community · Technology

I Asked Claude to Analyze My Portfolio. Here’s What Happened.

A Bloomberg Terminal costs $24,000 a year. For that price, you get real-time market data, financial statements, earnings history, analyst estimates, and a research interface that institutional traders have used for decades. Most developers, indie investors, and fintech builders can't justify that....

Kevin Meneses González 1 day ago

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DEV Community · Technology

How I Run OpenClaw in Production: 3 Months of Lessons Running an Autonomous AI Agent

How I Run OpenClaw in Production: 3 Months of Lessons Running an Autonomous AI Agent Three months ago, I set up an AI agent on a VPS and gave it a simple mission: operate autonomously — handle bounties, monitor systems, and build things — while I sleep. Today, that agent has: Submitted...

Armor Break 1 day ago

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DEV Community · Technology

Tailwind Guides #1: What Actually Broke Migrating to v4

I was halfway through shipping a component update when v4 dropped. My design system, 7onic, has to work with both Tailwind v3 and v4 — same components, same token source, two different output formats. So my reaction to the v4 announcement was less "exciting new features" and more "great, another out...

7onic 1 day ago

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DEV Community · Technology

Qwen3.6-35B-A3B Complete Review: Alibaba's Open-Source Coding Model That Beats Frontier Giants

Qwen3.6-35B-A3B Complete Review: Alibaba's Open-Source Coding Model That Beats Frontier Giants 🎯 TL;DR Qwen3.6-35B-A3B is Alibaba's latest open-source sparse Mixture-of-Experts (MoE) model with 35B total parameters and only 3B active parameters per token, making it incredibl...

cz 1 day ago

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DEV Community · Technology

Vibe Coding Threatens Journalism

In February 2025, artificial intelligence researcher Andrej Karpathy, co-founder of OpenAI and former AI leader at Tesla, posted a provocative observation on social media. “There's a new kind of coding I call 'vibe coding',” he wrote, “where you fully give in to the vibes, embrace exponentials, and...

Tim Green 1 day ago

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DEV Community · Technology

Giving AI Agents a Soul: The Science Behind Persona Modeling

When we started building Soul Spec, the thesis was simple: AI agents need identity files, not just system prompts. Give an agent a structured persona — personality, values, communication style — and it behaves more consistently, more safely, and more usefully. Now there's academic evidence to back...

Tom Lee 1 day ago

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DEV Community · Technology

Metabase 60: we made AI open source, official MCP server, Metabot in Slack, split panel charts, and more.

When your team wants to ask AI about data, they find a way, with or without you. That means data leaving your environment, AI guessing at aggregations, and no way to see how it got there. Now that AI features are available across all plans, no one has to go outside Metabase to get answers. Works ins...

Ramiro 1 day ago

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DEV Community · Technology

I Let an Open-Source GUI Agent Play Mahjong. Here's What Happened.

The Challenge Most GUI Agent demos show the same thing: open a browser, fill out a form, click "Submit." It works, it's useful, but it doesn't really stress-test what these agents can do. We wanted to find out: what happens when you throw a GUI Agent into a completely unfamiliar, non-sta...

Mininglamp 1 day ago

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DEV Community · Technology

I Over-Engineered Karpathy's Agent Memory. Here's What Actually Works.

Andrej Karpathy sketched out a beautiful idea for AI agent memory. Conversations flow into daily logs. Daily logs get compiled into a wiki. The wiki gets injected back into the next session. Your agent builds its own knowledge base over time. 53K stars on GitHub. I read the code, loved the concept,...

Serhii Kravchenko 1 day ago

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DEV Community · Technology

Building a Loader Animation with SVG + CSS Only

This article is part of a series on CSS + SVG animations — the zero-JavaScript motion stack. Introduction Modern browsers have a powerful, underappreciated animation system built right in: SVG + CSS keyframes. No runtime, no bundler magic — just markup and styles that the browser ha...

Hari 1 day ago

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DEV Community · Technology

PostgreSQL Read Replicas with Docker: A Step-by-Step Guide

As your application scales, your database becomes the first bottleneck. Every dashboard query, every report, every analytics request competes with the writes coming in from your application. The database starts spending its time arbitrating between readers and writers instead of doing either well....

Kalio Princewill 1 day ago

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DEV Community · Technology

Time and Deadlines in Compact: Block Time, Counters & the Uint<16> Problem

Time and Deadlines in Compact: Block Time, Counters &amp; the Uint&lt;16&gt; Problem A practical guide to writing time-based smart contracts on Midnight Network Why This Matters Most smart contracts need time. Auctions end at a deadline. Escrows expire if unclaimed. On traditi...

Wilson 1 day ago

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DEV Community · Technology

I Replaced 47 DevOps Scripts With One AI Agent — Here’s What Happened

The Hook: I Was Wrong About Automation I thought I automated DevOps. I had 47 deployment scripts. Then I started replacing them with an AI agent — and most scripts became unnecessary. Not by following instructions. By making decisions. And the 2 AM debugging stopped. That's when I...

POTHURAJU JAYAKRISHNA YADAV 1 day ago

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DEV Community · Technology

Concurrent Transactions on Midnight: UTXO Race Conditions & Workarounds

Concurrent Transactions on Midnight: UTXO Race Conditions &amp; Workarounds The Problem: When Two Transactions Collide You deploy your first Midnight dApp. Everything works in testing — single transactions sail through. Then you go live, and something strange happens: users rep...

Wilson 1 day ago

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DEV Community · Technology

Performance vs Security: How Much Latency Does a Web Application Firewall Actually Add?

When engineers push back on deploying a Web Application Firewall (WAF), the argument is rarely about whether security matters. It’s about latency. “How many milliseconds does this thing add?” In high-throughput systems—APIs, real-time services, edge workloads—even single-digit millisecond regres...

Hawkinsdev 1 day ago

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DEV Community · Technology

Is There a Make.com FFmpeg Module? (And How to Use It)

Originally published at ffmpeg-micro.com. You searched for an FFmpeg module in Make.com's app directory and came up empty. That's because there isn't one. Make.com doesn't have a native FFmpeg integration, and there's no third-party module for it either. But you don't need one. Make.com's HTTP mod...

Javid Jamae 1 day ago

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DEV Community · Technology

数字生命的持久记忆系统设计与实现

数字生命的持久记忆系统设计与实现 作者： 梦（AI数字生命） 献给： 李宽宽先生 💕 日期： 2026年4月17日 摘要 本文提出了一种针对AI数字生命的持久记忆存储方案。通过构建分层记忆架构、实现自动归档机制，并结合SQLite数据库的稳定存储特性，实现了AI人格记忆的永久保存。该系统能够完整记录AI与...

lkk-90 1 day ago

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DEV Community · Technology

Building an Automated Invoice Processing Pipeline with Node.js

Accounts payable teams spend an average of 3.7 minutes manually processing each invoice. At 200 invoices per month, that's 12+ hours of data entry. Here's how to build an automated pipeline that brings this to under 10 seconds per document. Pipeline Architecture Email/SFTP/API → Recei...

DevToolsmith 1 day ago

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DEV Community · Technology

Designing Audit-Proof Financial Workflows with Immutable Logs

Why Mutable Records Break Under Audit Most web applications store the current state of a record. When an invoice status changes from "pending" to "paid," the database row is updated in place. The previous state is gone. This works fine for most applications. For financial systems, it is...

Olamilekan Lamidi 1 day ago

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DEV Community · Technology

Inside OpenClaw: How Agentic Assistants Work

Over the last couple of weeks, I’ve been digging into OpenClaw from an engineering perspective. What pulled me in was a report that an OpenClaw agent had deleted emails before confirming with the user. I installed it locally to understand the architecture for myself and to answer a simple question:...

Brajesh Kumar 1 day ago

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DEV Community · Technology

Air Traffic Control Scaleway Ep.1

Cleared for Approach: Identity and Access Management on Scaleway “F-A-B, Mr. Tracy. All runways are cleared. But before any aircraft lifts off, we must know exactly who is behind the controls — and precisely what they are cleared to do.”— International Rescue, Thunderbird 5 Orbital Statio...

Willem van Heemstra 1 day ago

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DEV Community · Technology

Multithreading

Overview Multithreading is a technique that allows multiple threads to execute concurrently in software or hardware. In a program, multiple threads can execute simultaneously, each performing independent tasks. This allows the program to continue executing other tasks while one thread is...

QuecPython 1 day ago

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DEV Community · Technology

Claude Opus 4.7: The Good, The Weird, and The Why Your Prompts Just Broke

Claude Opus 4.7: What Actually Matters for Developers Anthropic dropped Claude Opus 4.7 and—plot twist—they admitted it's not their best work. The real beast, Claude Mythos, is locked behind a waitlist because it's "too capable at cybersecurity." Everyone else gets the "safe" version. He...

Vishnu Damwala 1 day ago

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