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.

September 2026

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    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

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    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

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    Influencing without authority

    None of the teams I work with report to me. Notes on getting workflows changed anyway.

January 2026

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    My RAG setup is just Obsidian now

    The clever retrieval experiment gave way to plain markdown files, and it works better.

November 2025

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    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

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    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

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    OpenAI just adopted Anthropic's MCP

    The industry is standardizing the thing I've been hand-building for two years.

February 2025

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    My first RAG experiment

    After a year of hand-feeding custom GPTs, I finally tried retrieval. Notes from the first rough version.

December 2024

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    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

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    Finally read Co-Intelligence

    Mollick's four rules for working with AI, checked against a year of doing it daily.

June 2024

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    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

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    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

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    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

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    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

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    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

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    What taking a product from zero to one taught me

    A three-month reflection on launching a recruiting platform across 26 offices.

August 2023

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    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

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    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.