Fine-Tune vs Prompt-Engineer an LLM: Decision Guide

Answer-first: A clear decision framework for AI engineers: when to fine-tune (LoRA/QLoRA), when to prompt-engineer, and when RAG is the right answer instead. Three engineers on the same team are trying to build the same thing: a customer support assistant that answers questions in the company’s specific support style, using terminology from their product documentation. One engineer says “just write a better system prompt.” Another says “we need to fine-tune a model.” The third says “this is clearly a RAG problem.” ...

June 1, 2026 · 12 min · Lê Tuấn Anh

Autonomous Hybrid-AI Pipeline: Cron to State-Machine

It’s easy to write a cron job that pings an API, hands a URL to OpenAI, and publishes a markdown file. It’s significantly harder to orchestrate a distributed swarm of AI agents that can read deeply from diverse sources, deduplicate state across time, evaluate article quality through a multi-layer gate, safely publish via GitOps, and optimize its own power footprint—all without human intervention. In this deep tech dive, I will walk you through the complete architecture of my V3 Autonomous Content Pipeline. We’ll cover the shift from a time-based monolithic script to a state-based orchestration model, the engineering behind a 3-tier Hybrid AI routing strategy that crashes token costs from ~$3.50/day to nearly $0.05/day, and how to operate a physical GPU cluster with Wake-On-LAN to drive hardware electricity costs near zero. ...

May 18, 2026 · 15 min · Lê Tuấn Anh

Production Agentic AI Swarm: OpenClaw & LiteLLM

Answer-first: Deploy a resilient, production-ready AI swarm using OpenClaw, LiteLLM, and Docker. Covers routing, security, and zero-downtime agent orchestration. The era of simple, conversational AI chatbots is over. In 2026, the industry has aggressively shifted toward Agentic AI—autonomous systems capable of planning, executing, and iterating on multi-step workflows without constant human supervision. (For a deeper dive into these Agentic System Architecture principles, see our Agentic System Architecture masterclass). However, building an agent is the easy part. The real engineering challenge lies in the infrastructure required to keep a swarm of agents running 24/7. When your autonomous system relies on third-party LLM APIs, a single rate limit (HTTP 429) or a model deprecation (HTTP 404) can instantly crash your entire operational pipeline. ...

May 17, 2026 · 7 min · Vesviet

Executive Summary: The Disruption of Naive RAG and the GraphRAG Era

If you have ever built an internal chatbot for your company by chunking documents, creating embeddings, and stuffing them into Pinecone or Milvus… you have undoubtedly encountered this scenario: User: “What was the Q3 revenue for product A, and how does it affect the Q4 strategy?” Bot: (Replies hesitantly, outputs last year’s Q2 figures, and completely loses context regarding the strategy). Welcome to the disruption of Naive RAG (Retrieval-Augmented Generation). ...

May 17, 2026 · 2 min · Lê Tuấn Anh

LeaseInVietnam: AI-Powered Expat Rental & B2B Lead Engine

Answer-first: Build an autonomous AI pipeline that scrapes and publishes expat rental intelligence for Vietnam, turning articles into a B2B lead funnel. Most AI content projects are built around one question: how do I publish more? LeaseInVietnam is built around a different question: how do I make every published piece convert? The system is an autonomous relocation hub targeting expats and digital nomads renting in Southern Vietnam — Ho Chi Minh City, Nha Trang, Phú Quốc. It produces content in American English, publishes daily via GitOps, and routes every reader interaction toward a B2B lead funnel that pays commission on moving services, cleaning bookings, furniture rentals, and legal consultations. ...

April 24, 2026 · 13 min · Lê Tuấn Anh