WhoBuilt

The AI Stack We Actually Use for Prototyping, Strategy, and Personal OS

Jan 11, 2026· 52 min· 17K views·Watch on YouTube

Speakers

Peter Yang hosts product managers Tal and Aman to share AI workflows for strategy writing, rapid prototyping, prioritization, and personal productivity.

Draft strategy with AI, then sharpen the direction

Peter demonstrates using a Claude project with a one-page strategy template and research to draft a memo for Google AI Studio. Tal says the first draft is vague and recommends starting with the team’s north star, success measures, and longer-term plan. The group refines the idea around winning in prototyping first, with a longer-term path from prototype to production.

Prototype before writing the full spec

Peter uses Google AI Studio to reproduce an existing interface and add a template feature, creating a shareable prototype teammates can iterate on. He says he tested a prototype with users before the designer’s Figma mocks were ready. The group suggests prototypes can help teams explore ideas and communicate them, while documents remain useful for clear thinking and edge cases.

Use Markdown files as a thinking workspace

Tal shows an Obsidian Kanban board backed by Markdown files that he can also open in Cursor. He asks AI to review initiative priorities and rollout plans, then discusses the recommendations before applying changes. He prefers reviewing diffs and controlling edits, especially when working with plain-language planning files.

Build a personal AI workflow from skills and context

Aman demonstrates a personal operating system using Claude Code, Obsidian, Markdown files, and skills for tasks such as morning planning. The workflow can check meeting transcripts, tasks, and goals, then suggest a daily focus; a local script accesses Granola notes. Aman says adding personal goals and work context helps the agent align suggestions with what matters to him.

Personal AI products support focus and learning

Peter says AI helps him draft memos and PRDs, prototype with teams and users, stay focused across weeks, and handle routine emails in his writing style. Tal uses AI to think through initiative priorities and rollout stages. The hosts describe their customized workflows as personal AI products they keep improving, and emphasize that much of the setup is text files and context.

Takeaways

  • Start strategy work with a clear goal and success measure, then use AI research and drafts to refine it.
  • Prototype early to gather user feedback and make product ideas easier to discuss with teammates and executives.
  • Keep planning context in readable Markdown files so both people and AI tools can work with it.
  • Review AI edits to planning files and discuss recommendations before changing priorities.
  • Add goals, preferences, and work context to AI workflows to support focus and routine communication.

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What was claimed 9

  • built
    creator
    “Google AI Studio is basically this product that Google built to prototype apps and websites.”
    YouTube
    Verified2 sources· Talk, Web· archived
  • feature
    Google AI Studio: Prototypes apps and websites
    “Google AI Studio is basically this product that Google built to prototype apps and websites.”
    YouTube
    Unverified1 source· Talk
  • uses
    “I actually moved cursor.com off of a CMS to just Markdown and MDX files”
    2:45inAI codes better than me. Now what?YouTube
    Verified2 sources· Talk
  • feature
    Gemini 3: Multimodal output
    “Google's advantage is that the Gemini model is incredible at multimodal output.”
    YouTube
    Unverified1 source· Talk
  • feature
    Quarry: Turns rough notes into dev-ready specs, breaks work into tasks, and can hand them off
    “Quarry is an AI agent that handles the busy work of product development and turns rough notes into dev-ready specs, breaks work into tasks, and can even hand things off.”
    YouTube
    Unverified1 source· Talk
  • metric
    Quarry: 48% time saved on spec creation and scoping
    “Teams using Corey report 48% time saved on spec creation and scoping.”
    YouTube
    Unverified1 source· Talk
  • uses
    “It's a really pretty way to visualize Markdown files.”
    YouTube
    Unverified1 source· Talk
  • uses
    Linear uses MCP
    “Can you use the Linear MCP? Look at the MVP projects.”
    YouTube
    Unverified1 source· Talk
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