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⚡ AI Lessons

Dev.to · Julien L
📐 ML Fundamentals
⚡ AI Lesson
2mo ago
Building a Real-Time Recommendation Engine with VelesDB
A visitor lands on the Elden Ring product page. They have never signed up, just browsing. Next to the...

Dev.to · Julien L
👁️ Computer Vision
⚡ AI Lesson
3mo ago
Find duplicate photos on your machine in 0.3ms - no cloud, no GPU
You have 10,000 photos on your laptop. Some are duplicates. Some are resized. Some are cropped...

Dev.to · Julien L
🔐 Cybersecurity
⚡ AI Lesson
3mo ago
I built a database in France because the Cloud Act makes EU data sovereignty impossible
In January 2025, the US administration fired three members of the Privacy and Civil Liberties...

Dev.to · Julien L
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3mo ago
What if SQL could search by meaning? Meet VelesQL
VelesQL is a SQL-like query language that does vector search, graph traversal, and full-text ranking in a single query. Here is what it looks like in practice.

Dev.to · Julien L
🤖 AI Agents & Automation
⚡ AI Lesson
3mo ago
Run your AI assistant fully offline: a local-first architecture
What if your AI assistant worked on an airplane? In a hospital? On a classified network? Most AI...

Dev.to · Julien L
🤖 AI Agents & Automation
⚡ AI Lesson
3mo ago
Share memory between AI agents without infrastructure
Two AI agents need to collaborate. One researches, the other writes. How do they share what they...

Dev.to · Julien L
🔍 RAG & Vector Search
⚡ AI Lesson
3mo ago
One query is never enough: why top RAG systems search three times
LangChain's MultiQueryRetriever and LlamaIndex's SubQuestionEngine exist for a reason. Here's the math behind multi-query fusion - and how to do it in one API c

Dev.to · Julien L
⚡ AI Lesson
3mo ago
Stop Using Cosine for Everything: 5 Distance Metrics That Unlock Hidden Powers in Your Vector Database
Everyone uses cosine similarity. Tutorials use it. Frameworks default to it. If you ask "which...

Dev.to · Julien L
3mo ago
Your RAG pipeline is missing two-thirds of the picture
Most RAG pipelines do one thing well: find text chunks that are semantically similar to a query. But...

Dev.to · Julien L
3mo ago
Build a local RAG pipeline in 30 lines of Python (no Docker, no API keys)
Most RAG tutorials start with "spin up Docker" and "get your API key." This one starts with pip...

Dev.to · Julien L
3mo ago
Build an MCP server that gives any LLM long-term memory
Your LLM forgets everything after each session. MCP lets you fix that with 3 tools and zero...

Dev.to · Julien L
🤖 AI Agents & Automation
⚡ AI Lesson
3mo ago
Give your AI agent a real memory in 50 lines of Python
Your AI agent is brilliant for exactly one conversation. Then it forgets everything. It doesn't...

Dev.to · Julien L
3mo ago
I replaced my 500MB vector database Docker stack with a 3MB embedded engine
Most vector database tutorials start the same way: docker pull qdrant/qdrant docker run -p...
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