Archive

Articles

The full Ratchet archive, grouped by series. Start with AI Unlocked for the foundations, then move into Agent Harness Engineering for the production systems around the model.

3 essays

Agent Harness Engineering

June 18, 2026
01

Stop Blaming the Model

Why your AI agent is dumber than it should be, whether it's writing code, answering customers, or taking voice orders, and the discipline that actually fixes it.

The ConceptMay 21, 20268 minute read
02

Inside the Harness

The six pieces of scaffolding that turn a model into an agent, with examples from coding agents and e-commerce chatbots alike.

The AnatomyJune 4, 20269 minute read
03

Building Your First Agent Harness

An e-commerce customer-service chatbot in about a hundred lines of Python: four tools, three hook layers, and the ratchet of what to add only when you watch it fail.

The PracticeJune 18, 20269 minute read
14 essays

AI Unlocked

November 4, 2024
00

๐Ÿง ๐Ÿ”“ AI Unlocked: Building and Mastering Large Language Models, Step-by-Step ๐Ÿ“š

Welcome to the ultimate series on ๐Ÿง ๐Ÿ”“AI Unlocked: Building and Mastering Large Language Models, Step-by-Step ๐Ÿ“šfrom scratch!

Series OverviewOctober 19, 20247 minute read
01

#1 ๐Ÿง  Why Prompt Engineering, Fine-Tuning, and RAG? ๐Ÿค”๐ŸŽฏ

Have you ever wondered how AI models like GPT get so good at understanding and responding to our questions?

Prompting, Fine-Tuning, RAGOctober 20, 20246 minute read
02

#2 ๐Ÿ—๏ธ Introduction to LLMs: Understanding the Building Blocks of AI ๐Ÿ“๐ŸŒ

If youโ€™ve heard of AI models like GPT, you might wonder why theyโ€™re so good at understanding and responding to our questions.

LLM BasicsOctober 20, 20249 minute read
03

#3 ๐Ÿ›๏ธ LLM Architectures and Landscape: The Journey from Attention to Transformers ๐Ÿš€๐Ÿ“š๐Ÿ”

In this chapter, we explore the historical development of the attention mechanism and how it led to the creation of transformers, the core architecture of modern Large Language Models (LLMs).

Attention to TransformersOctober 21, 20247 minute read
04

#4 ๐Ÿ›๏ธ From Attention to Advanced AI: Decoding Modern LLMs with Transformers, LLaMA, GPT, and Moreโ€ฆ

In this chapter, weโ€™ll dive into the evolution of Large Language Models (LLMs), starting from the basics of transformers to the rise of popular models like LLaMA, GPT, and Claude.

Transformer ModelsOctober 21, 20249 minute read
05

#5 ๐Ÿ› ๏ธ Mastering LLMs in the Real World: Evaluating Performance, Tackling Hallucinations, Bias, and Boosting Efficiency ๐Ÿ“Š๐Ÿš€

While LLMs have revolutionized AI, they still encounter real-world challenges like hallucinations, bias, and compute limitations.

Evaluation and Failure ModesOctober 21, 202411 minute read
06

#6 ๐Ÿ—ฃ๏ธ Mastering Prompting: Techniques, Tips, and Security for Effective AI Conversations ๐Ÿ’ฌ๐Ÿ”ง๐Ÿ›ก๏ธ

Prompting is the fundamental skill needed to communicate effectively with Large Language Models (LLMs).

Prompting and SecurityOctober 27, 20246 minute read
07

#7 ๏ธ Understanding RAG โ€” From Memory to Real-Time Retrieval

In todayโ€™s AI landscape, language models are like students who have read many books but still need to look up information for precise answers.

RAG FundamentalsOctober 28, 202411 minute read
08

#8 Real-World Magic โ€” How RAG Transforms Industries โœจ

Retrieval-Augmented Generation (RAG) has emerged as a key AI innovation across industries, offering dynamic, accurate, and context-rich responses.

RAG ApplicationsOctober 28, 20247 minute read
09

#9 ๏ธ Mastering LLM Workflows with LangChain & LlamaIndex

LangChain and LlamaIndex are two widely used frameworks in the LLM ecosystem, designed to simplify interactions with LLMs, manage conversation flows, and facilitate efficient data retrieval.

LangChain and LlamaIndexOctober 28, 202412 minute read
10

#10 Real-World Power: Advanced Applications of LangChain & LlamaIndex in AI Solutions

In this chapter, we dive into advanced real-world applications of the powerful frameworks LangChain and LlamaIndex.

Framework ApplicationsOctober 28, 202412 minute read
11

#11 Elevating Your AI with Advanced RAG Techniques : A Comprehensive Guide

Retrieval-Augmented Generation (RAG) has revolutionized how AI applications interact with vast knowledge bases, enabling models to generate more accurate and contextually relevant responses.

Advanced RAGNovember 4, 202421 minute read
12

#12 ๏ธ Modular RAG: Crafting Customizable Knowledge Retrieval Systems

Imagine building a team of experts, each specializing in a unique area, working together seamlessly to solve a complex problem.

Modular RAGNovember 4, 20246 minute read
13

#13 ๏ธ Fine-Tuning LLMs for Precision: Unlocking the Full Potential of AI

Imagine youโ€™ve trained a chef who can cook any dish. But if you need them to perfect a regional specialty or add a unique twist, youโ€™ll give them more specific training.

Fine-TuningNovember 4, 202410 minute read