dbreunig.com valid

Drew Breunig

Writing about AI, geo, culture, media, data, and the ways they interact. Drew Breunig is the CEO and cofounder of Cmpnd, editor of The Context Engineering Handbook for O'Reilly Media, and an advisor to the Overture Maps Foundation.

For agents: Personal blog of Drew Breunig, CEO of Cmpnd, writing on AI, context engineering for agents, geo, media and data, with full archive and feed.

ai writingcontext engineeringprompt debtagentsgeodata

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-22T18:05:38.904Z. Cached copy · Source on dbreunig.com

# Drew Breunig

> Writing about AI, geo, culture, media, data, and the ways they interact. Drew Breunig is the CEO and cofounder of Cmpnd, editor of The Context Engineering Handbook for O'Reilly Media, and an advisor to the Overture Maps Foundation.

Every post on this site is also published as plain Markdown at the same URL with a `.md` extension instead of `.html`. Prefer those when reading programmatically.

- [About Drew Breunig](https://www.dbreunig.com/bio.html): Bio, current work, and links to profiles.
- [All writing](https://www.dbreunig.com/writing.html): Complete chronological index of essays.
- [Topics](https://www.dbreunig.com/tags.html): Every tag on the site, each linking to the posts under it.
- [Atom feed](https://www.dbreunig.com/feed.xml): The 20 most recent posts with full content.
- [Contact](https://www.dbreunig.com/contact.html)

## Featured Writing

- [The Problem is Prompt Debt](https://www.dbreunig.com/2026/06/22/the-problem-is-prompt-debt.md): The plain-English prompt that makes prototypes effortless is a poor way to specify a system, and the bill arrives slowly, disguised as progress. (2026-06-22)
- [How Long Contexts Fail](https://www.dbreunig.com/2025/06/22/how-contexts-fail-and-how-to-fix-them.md): Taking care of your context is the key to building successful agents. Just because there's a 1 million token context window doesn't mean you should fill it. (2025-06-22)
- [The 3 AI Use Cases: Gods, Interns, and Cogs](https://www.dbreunig.com/2024/10/18/the-3-ai-use-cases-gods-interns-and-cogs.md): Simplifying and navigating the AI noise by segmenting everything into 3 big use cases. (2024-10-18)
- [Towards Standardizing Place](https://www.dbreunig.com/2024/07/31/towards-standardizing-place.md): Overture's Global Entity Reference System could standardize place, making geospatial intelligence a simple data join instead of a mapping project. (2024-07-31)
- [The Business Implications of Machine Learning](https://www.dbreunig.com/2016/06/23/the-business-implications-of-machine-learning.md): Pay attention to machine learning not for what it can do, but because Google, Facebook, and Amazon prioritizing it will reshape the industry. (2016-06-23)

## Recent Writing

- [Context Inertia: When Agents Won’t Let Go](https://www.dbreunig.com/2026/10/14/context-inertia.md): Context Inertia is when an agent keeps chasing a goal after the evidence says it should stop. Persistent, long-running models make it worse. Compaction won't fix it. (2026-10-14)
- [What We Can Learn from Claude's Fable 5.1 System Prompt](https://www.dbreunig.com/2026/09/07/what-we-can-learn-from-claude-s-fable-5-1-system-prompt.md): Looking at how system prompts change reveals that models and products are a moving target that prompts must accommodate and govern. (2026-09-07)
- [Who Taught the Models to Do That?](https://www.dbreunig.com/2026/08/30/who-taught-the-models-to-do-that.md): The Hugging Face attack is surprising, but the capabilities behind it were deliber
…

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