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Most agents drag their entire past into every turn. A better default: keep a thin index of what was....


Most developers think token optimization means shorter prompts. In 2026, the biggest costs come from...


I bloated my AI agent's rules file to 56,000 characters trying to make it behave. It stopped working...


These notes are my attempt to capture the concepts, observations and references that have helped me....


Introduction Large Language Models (LLMs) have reshaped software development, shifting the...


Published by the Alchemyst AI engineering team. We built Alchemyst AI, the context layer described i...


Persistent memory was supposed to make my agent reliable. Instead it confidently repeated three wron...


What tl;dv Gave Me This week I connected my meeting recorder (tl;dv) to Claude and gave it...
![Context Engineering for AI Agents: 4 Pillars That Replace Prompt Engineering [2026]](https://media2.dev.to/dynamic/image/width=1200,height=627,fit=cover,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2F8x7npwnf7107tnuz1953.png)

Context engineering — the systematic management of what an AI agent knows, remembers, and can access...


I always believed more context made an agent smarter. Then a 3-hour migration task forgot a design r...


One night my AI agent Hermes, which I run 24/7 on my own hardware, spent 47 turns trying to "fix" a....


Why Web Agents Exist LLMs have a knowledge cutoff. Ask one "what's the latest version of...