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Coding agents make software engineering harder

via jbranchaud@gmail.com

https://simonwillison.net/2026/Sep/24/harder/

We can do amazing things with [coding agents], but unlocking their full potential requires extraordinary discipline and knowledge.

Sending prompts one at a time to Claude Code to fix a bug or build a feature is only the tip of the iceberg.

Getting coding agents to integrate well into every part of the software engineering process is way more involved. Getting coding agents to help you not just ship features faster but to ship features better is not a given.

Coding agents, in my experience, take the path of least resistance when taking on a coding task. They aren't, by default, finding useful abstractions or proactively identifying architectural improvements or pruning excess, duplicative tests from the test suite, etc. That's where your own knowledge and discipline, understanding of the broader context, asking thoughtful questions, curating agent skills and workflows, and other human touches play a big role.