I design AI-native product operating systems that turn humans into builders.

Director of Product by day; solo founder of Angry Letters by side. Human-in-the-loop workflows augmented with effective AI, not buzzwords.

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What I Do

Structured systems for shipping product. Clarity, gates, visibility, and alignment. The shit stakeholders love.

I turn messy product intent into a runbook a team can actually operate when AI makes execution cheap and judgment expensive.

Operating systems

I design Product OS workflows across product, execution, memory, and human layers so teams ship with governance, not drift.

  • Conversion lifted 6.5% to 8.4% by making the operating model measurable, not prompt-driven.
  • OKRs, A/B tests, and a North Star replaced feature theater. Engagement moved 116% year over year.
  • Human checkpoints stay in the loop so speed does not become silent drift.

See the Work evidence →

Build in public

Labs is where I run real experiments... Angry Letters, this site, Mage Match... and document the OS behind each. Compare stacks, context, and tradeoffs.

  • Angry Letters is a live SaaS: payments, creator programs, admin, and AI-assisted content under real constraints.
  • This site is the public experiment for a grepable, stage-gated Product OS.
  • Mage Match is a browser puzzle-battle: vs CPU first, then human PvP.

Open the Labs case studies →

Portable frameworks

Templates, agent packs, and runbooks you can drop into your repo.

  • One four-layer language: Product, Execution, Memory, Human.
  • Angry Letters OS and the strategy/context system ship as public repositories, not slideware.

Clone the Frameworks →

Featured Lab

Angry Letters

Live SaaS: payments, creator programs, admin back office, AI-assisted content. Built as a solo founder using a product-specific operating system that is separate from this site’s system.

angryletters.us · See all Labs →

Featured Writing

Product Work Needs an Operating System, Not a Prompt Library

I think prompts get a team moving, but they do not give the work anywhere to go. That is where a product operating system starts to matter.

5 min read · Product operating systems

Read article → · See all in Thinking →

Collaborate

Reach out by email or connect on LinkedIn.

mpheyman@gmail.com LinkedIn