# Field notes

> Notes on software, systems and craft by Noah Mitchem.

## Every note, newest first

- [Nobody Built a Software Factory. They Bolted Agents to the Old Assembly Line.](https://noahmitchem.com/notes/nobody-built-a-software-factory.md) (AUG 2026): On August 27, Uber reported that more than 70% of its pull requests now come from agents.
- [Agent auth, twice](https://noahmitchem.com/notes/agent-auth-twice.md) (JUL 2026): I built MCP servers with OAuth 2.1 at two companies before mid-2026. Notes from doing the same thing twice.
- [AI is about to get fast, and it’s never going to slow down](https://noahmitchem.com/notes/ai-is-about-to-get-fast-and-it-s-never-going-to-slow-down.md) (JUN 2026): On June 9, Anthropic shipped Claude Fable 5, and every scoreboard agreed at once. #1 on Artificial Analysis.
- [If AI Writes Your Code, Why Use Python?](https://noahmitchem.com/notes/if-ai-writes-your-code-why-use-python.md) (APR 2026): For the last decade, fast-to-ship beat fast-to-run. Not anymore.
- [AI Agents Don’t Need Pull Requests. They Need Feedback Loops.](https://noahmitchem.com/notes/ai-agents-don-t-need-pull-requests-they-need-feedback-loops.md) (MAR 2026): A few weeks ago, I published a piece arguing that GitHub’s model is breaking under AI-generated code.
- [AI Agents Don’t Need Your Developer Tools](https://noahmitchem.com/notes/ai-agents-don-t-need-your-developer-tools.md) (MAR 2026): Vercel built sixteen specialized tools for their AI agent.
- [GitHub Is Dying and Developers Don’t Even Know It Yet](https://noahmitchem.com/notes/github-is-dying-and-developers-don-t-even-know-it-yet.md) (FEB 2026): In 2008, GitHub changed how developers worked. In 2018, Microsoft paid $7.5 billion to own that change.
- [Something Flipped in December](https://noahmitchem.com/notes/something-flipped-in-december.md) (FEB 2026): In July 2025, the most rigorous study ever conducted on AI coding tools found they made experienced developers 19% slower.

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