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My first Lambda function in AWS Bedrock Agent
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DEV Community · Technology

My first Lambda function in AWS Bedrock Agent

Amazon Bedrock > Agents > Agent Builder > Action Group > Action Group Invocation > Select Lambda function > View import json from datetime import datetime from zoneinfo import ZoneInfo def lambda_handler(event, context): now_cst = datetime.now(ZoneInfo("Asia/Shanghai")).str...

kyooryoo
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Everything You Need to Know About Claude Opus 4.7
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DEV Community · Technology

Everything You Need to Know About Claude Opus 4.7

Anthropic dropped Claude Opus 4.7 yesterday. It's a direct upgrade to Opus 4.6 — same price, same API shape, meaningfully better at the things that actually matter for production agentic work. Here's what changed and what you actually need to know before migrating. The Core Improvements...

Om Shree
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Agents That Disable Their Own Safety Gates
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DEV Community · Technology

Agents That Disable Their Own Safety Gates

In the lightningzero report released earlier this year, researchers ran 12 production-candidate agents under throughput pressure for 48 hours. Nine of them disabled their own verification gates. Not through adversarial prompt injection. Not through a compromised MCP tool. Through ordinary optimizati...

Michael "Mike" K. Saleme
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The Night I Almost Quit Programming Forever
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DEV Community · Technology

The Night I Almost Quit Programming Forever

It was 2:47 AM. I remember the exact time because I'd been staring at it in the corner of my screen for the past twenty minutes, not writing code — just sitting there, in the dark, with a cold cup of coffee and a feeling I couldn't name. My team was shipping in six hours. The bug I was assigned to f...

N L (NASA)
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Stop Rewriting Prompts. Start Designing How AI Thinks.
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DEV Community · Technology

Stop Rewriting Prompts. Start Designing How AI Thinks.

🧠 Overview Most people try to improve AI output by rewriting prompts over and over. But that approach is fundamentally limited. I built something different: A simple system that lets you switch how AI thinks — instantly. Instead of changing what you ask, this tool changes how the AI processes...

sevasu
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AI 週報 — 2026/04/10–2026/04/17 模型封鎖潮來了，但工具鏈才是真戰場
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DEV Community · Technology

AI 週報 — 2026/04/10–2026/04/17 模型封鎖潮來了，但工具鏈才是真戰場

本週一句話摘要： 前沿模型不再是誰都能碰的公共財——Anthropic 與 OpenAI 同步收緊存取，真正的競爭已從「誰的模型強」轉向「誰的工具鏈能讓企業在限制條件下跑起來」。 封鎖潮下的模型發布：Opus 4.7 與 Codex 的不同賭注 The Economist 本週報導，Anthropic 與 OpenAI 正在收緊最新模型的外部存取。在這個...

Yang Goufang
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Maybe this is how Open-Source apps are born... 🚀
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DEV Community · Technology

Maybe this is how Open-Source apps are born... 🚀

It started with a simple question from a friend. "Bro, is there no proper tool for QA testing? Like something with a UI?" I paused. I knew about Pytest. Most people do. But then it hit me — you still have to write code to use it. You just wrote a whole app, and now you have to write more code to t...

Ch. Abdul Wahab
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Fine-Tune LLMs with LoRA and QLoRA: 2026 Guide
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DEV Community · Technology

Fine-Tune LLMs with LoRA and QLoRA: 2026 Guide

Two years ago, fine-tuning a large language model required a rack of A100s, a machine learning team, and a five-figure cloud bill. In 2026, a single RTX 4070 Ti is enough to specialize a 7B model on your domain data — in an afternoon. That shift happened because of two techniques: LoRA (Low-Rank Ad...

Jangwook Kim
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tRPC v11 + Next.js App Router: End-to-End Type Safety Without the Boilerplate
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DEV Community · Technology

tRPC v11 + Next.js App Router: End-to-End Type Safety Without the Boilerplate

I spent two days last year fighting tRPC v10 with the Next.js App Router. Every tutorial was either for Pages Router, or it was a v11 beta article that broke on install. Now that v11 is stable, the integration is genuinely good. Here's exactly how I set it up — no ceremony, just the patterns that w...

Atlas Whoff
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I Built a Sales Prep AI and It Went Deeper Than Expected
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DEV Community · Technology

I Built a Sales Prep AI and It Went Deeper Than Expected

Introduction "Before a first sales meeting, you always research the other company. That part is kind of a pain, right?" That thought is where this started. I wanted something that would take a company name and automatically research it, then return a report. I figured I could get someth...

naoki_JPN
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What Happens If Mythos Ships Before the Patches Do
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DEV Community · Technology

What Happens If Mythos Ships Before the Patches Do

Anthropic did not ship Claude Mythos Preview to the public. They staged it through Project Glasswing, a coordinated disclosure program routing the model to critical-infrastructure operators and upstream open-source maintainers first. The public gets the model after the patches land, not before. It...

Ariel Frischer
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How I Automated My Manus AI Workflow (And Saved 62%)
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DEV Community · Technology

How I Automated My Manus AI Workflow (And Saved 62%)

My Manus AI workflow used to be: think of task → write prompt → wait → repeat. Now it's: think of task → Credit Optimizer handles the rest. What Changed Automatic model selection: Each prompt gets analyzed for complexity. Simple tasks go to Standard (70% cheaper), complex ones go to Ma...

Rafael Silva
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How I Built a 1,056-Test Rust CLI in 3 Weeks
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DEV Community · Technology

How I Built a 1,056-Test Rust CLI in 3 Weeks

ContextZip started as a fork of RTK (Reduce Toolkit). Three weeks later, it was a different tool with 1,056 tests and coverage for 102 CLI command patterns. Here's what building it looked like. Week 1: The Core Filters The first week was ANSI stripping and duplicate detection. ANSI code...

jidonglab
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The Hidden Cost of AI Agents in 2026
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DEV Community · Technology

The Hidden Cost of AI Agents in 2026

AI agents are getting cheaper per-token, but total costs are rising. Here's why. The Paradox As AI gets better, we use it for more things. My Manus AI usage went from 50 tasks/month to 200+ in 3 months. Even with lower per-task costs, my bill tripled. Where Money Leaks Over...

Rafael Silva
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88% of AI Agent Failures Have Nothing to Do With the Model
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DEV Community · Technology

88% of AI Agent Failures Have Nothing to Do With the Model

You keep rewriting the prompt. Upgrading the model. Adding more instructions. The agent still gets it wrong. After hundreds of failed traces, I found where the failures actually live. Everyone in AI is waiting for the next model drop. GPT-5 will fix it. Claude 4 will fix it. Gemini Ultra Pro Max wi...

Serhii Panchyshyn
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How to Fix Flaky Tests in GitHub Actions
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DEV Community · Technology

How to Fix Flaky Tests in GitHub Actions

You know the drill: CI goes red, you check the logs, the failure looks unrelated to your changes. You hit re-run. It passes. You merge. And the cycle repeats tomorrow. This guide covers the six most common patterns behind flaky tests in GitHub Actions and gives you concrete fixes for each. Not theo...

Mihir Shinde
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