Pier Madsen
I'm the AI director at One Planet Group, a portfolio of operating companies. I write about AI adoption, product, and leadership, and the decisions behind that work.
Latest
All writingSeptember 2026
- Alex Lieberman's AI roadmap playbook
Tenex sells the roadmap I run in-house. Where we match, and the step I'd add after the final presentation.
August 2026
- Identifying and implementing AI opportunities: an update
Results from the first find, prove, scale project nine months in, and why the monitoring layer turned out to be the bigger asset.
June 2026
- Influencing without authority
None of the teams I work with report to me. Notes on getting workflows changed anyway.
January 2026
- My RAG setup is just Obsidian now
The clever retrieval experiment gave way to plain markdown files, and it works better.
November 2025
- From AI experiments to AI products
A new job where AI is the whole job, and the first thing I've had to unlearn.
August 2025
- On "vibe coding"
Karpathy named the way I already build my spare-time tools. Here's where I do it and where I don't.
April 2025
- OpenAI just adopted Anthropic's MCP
The industry is standardizing the thing I've been hand-building for two years.
February 2025
- My first RAG experiment
After a year of hand-feeding custom GPTs, I finally tried retrieval. Notes from the first rough version.
December 2024
- How I'm putting AI to work as a product manager
Managing six people and maintaining custom GPTs turned out to be the same lesson about context.
September 2024
- Finally read Co-Intelligence
Mollick's four rules for working with AI, checked against a year of doing it daily.
June 2024
- Andrew Ng's agentic workflow patterns
Ng's four design patterns describe AI a step past where I am, and one of them keeps bugging me.
May 2024
- Staying accountable for AI-assisted work
What I expect from my team, and from myself, now that a lot of our first drafts come from AI.
April 2024
- Lenny on how AI will impact product management
My reaction to Lenny Rachitsky's take that AI will come for the high-level PM skills before the low-level ones.
March 2024
- Reading Marty Cagan's Transformed
Cagan's new book on the product operating model, read from inside a company that isn't a tech company.
January 2024
- How to get buy-in from stakeholders with competing priorities
What I've learned about winning resources for a product when every decision-maker is measured on something different.
October 2023
- What taking a product from zero to one taught me
A three-month reflection on launching a recruiting platform across 26 offices.
August 2023
- A Lenny’s Podcast episode on what makes a good PM
Why a Lenny’s Podcast conversation about product management resonated with me in 2023.
July 2023
- The Questions I Ask Before Writing a PRD
The questions I use to clarify a product problem, test assumptions, and prepare a PRD before writing requirements.