freeCodeCamp

How to Build an AI Support Agent That Knows When NOT to Answer Tickets

Tech With RJ |
Most AI support agent tutorials show you how to wire up Retrieval Augmented Generation (RAG) and call it a day. Convert the docs into numeric vectors, pull the closest few passages to the user's quest... read more

How to Self‑Host an S3‑Compatible Object Store with MinIO on Your Staging Server (and Save Hundreds of Dollars a Month)

Md Tarikul Islam |
This article is a complete copy‑paste guide to running MinIO behind Traefik with HTTPS, custom domains, and pre-signed upload/download URLs — using only Docker Compose. Your production will keep using... read more

From Flutter to Backend: How to Build and Ship Production REST APIs with Dart and Shelf

Oluwaseyi Fatunmole |
As a Flutter engineer, you already know Dart. You understand async/await, you work with models and repositories, you think in clean architecture, and you have shipped real applications. The gap betwee... read more

Beyond NVIDIA: Where the AI Infra Trade Actually Shows Up

Nikhil Adithyan |
The AI capex trade is usually discussed like one clean idea. Capex simply means capital expenditure, or the money companies spend on long-term assets like data centers, chips, servers, power systems,... read more

How to Build a PDF Page Numbering Tool in the Browser Using JavaScript

Bhavin Sheth |
When you're working with contracts, reports, invoices, manuals, or academic documents, page numbers make navigation much easier. Instead of manually editing every page, modern JavaScript libraries let... read more

How Step Counters Work in Wearables and Why Different Devices Give Different Results

Shradha Puri |
It’s been three years since I started using my wearables to count my steps. Three years of trying to hit the daily 10K target, closing rings, and going to sleep knowing that I accomplished something p... read more

How Declarative Partial Updates Work in HTML

Sumit Saha |
HTML has always supported streaming. The server doesn't need to build an entire page in memory before sending it to the browser. It can send the initial HTML first, then send more chunks as each chunk... read more

The Tradeoff That Slows Production Teams Down: Flexibility vs Actually Shipping

Manish Shivanandhan |
Every company says it wants speed. Roadmaps talk about velocity. Leadership meetings talk about reducing cycle time. Quarterly goals talk about faster execution and quicker releases. Every business wa... read more

How Contextual Embeddings and Hybrid Search Fix Retrieval Failures

Rishi Raj Jain |
If you’ve built a RAG (Retrieval-Augmented Generation) system in the past year, you’ve probably hit the wall where your LLM returns confidently wrong answers, cites information that doesn’t exist, or... read more

How Wearable IoT Enables Real-Time Fall Detection and Alerts

Shradha Puri |
Wearable IoT technology has become an important part of today’s elder care, as it can help detect falls and alert caregivers or family members immediately after an incident. This technology combines s... read more