# What Is AI Context Engineering? Giving Coding Agents the Right Context

> Source: <https://blog.codacy.com/ai-context-engineering>
> Published: 2026-10-29 16:49:42+00:00

When a coding agent breaks a rule your team agreed on, the usual instinct is to give it more instructions, but more material can make the agent worse.[__Chroma tested 18 models__](https://www.trychroma.com/research/context-rot) and found performance dropped as input length grew, even when the task stayed the same.