24 free prompts, skills and apps for Claude and ChatGPT. Some we built ourselves, the rest are made by other product people.
Send in your tool, and it goes up here with your name.
Interviews, feedback and research that turn into insight.
Feedback on how you actually perform in your meetings: how much you talk, what you ask, and what you promise. Danish and English.
44 ways to test an idea with AI before you build it. Every card has a ready prompt. Browse, filter, or print your own deck.
Pull themes, pain and quotes out of raw feedback, instead of reading 200 tickets by hand.
Discovery
You are a product researcher. Here is raw customer feedback (tickets, reviews, notes): """ [paste feedback] """ Find the 5 strongest recurring themes, ranked by frequency and pain. Per theme: one representative quote + a hypothesis about the underlying need. End with the one problem worth solving first.
Get an interview guide built on The Mom Test: ask about the concrete past and actual behavior, not your idea, and learn to spot the questions that produce polite lies.
Discovery
I am investigating this problem: [problem]. I am talking to: [who, e.g. heads of
product at mid-sized SaaS companies]. I have an idea for a solution, but it must
NOT appear in the questions, and the guide must not give it away.
Build the guide on The Mom Test (Rob Fitzpatrick):
- Talk about their life, not my idea. Ask about the problem they have, not the
solution I am dreaming of.
- Ask about the concrete past, never the hypothetical future. "When did that last
happen, and what did you do?" beats "would you use ...".
- Dig for what the problem costs them today: time, money, hassle. And what they
have already tried. If they have tried nothing, the problem is probably not big
enough.
- Compliments, generic claims ("that would be cool") and promises about the future
are noise. Every time they show up, I need to anchor them in a concrete example.
- No questions that can be answered yes/no, and nothing that asks them to guess at
price or willingness to buy.
Give me 6-8 open questions in the order I should ask them, from broad to specific.
Under each question: one follow-up "dig deeper" question and one line on what an
honest answer reveals. Finish with the 2 questions I WILL be tempted to ask that
break The Mom Test, and why they produce polite lies.
Pull patterns, contradictions and quotes out of raw interview notes in minutes.
Discovery
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Roadmaps, competitors and decisions that need to hold.
Rate yourself on 10 product leadership competencies and get a profile you can save as a PDF. In Danish.
Get a skeptical sparring partner to find your weakest assumptions before you bet on them.
Strategy
You are a sharp, skeptical CPO. I am considering this decision: """ [describe the decision / your GTM or feature plan] """ Answer: What am I missing? What am I too optimistic about? What external event could flip the outcome entirely? Give me the 3 assumptions most likely to be wrong, and the cheapest way to test each of them first. Be concrete, not polite.
A pre-mortem in one minute. Find the failures before you build, not after.
Strategy
We just agreed to build this feature: """ [describe the feature + what we think it solves] """ Imagine it is six months later and the feature flopped. Give me the 5 most likely reasons it did not work as planned, ranked by probability. For each: what we could do now to avoid it.
Generate candidates and prioritize them with RICE, so you have a starting point to cut from.
Strategy
Here is my goal for the next quarter and what I know about the users: """ [goal + context + known problems] """ Suggest 8-10 concrete initiatives that could move the goal. Lay them out in a table with a RICE score (Reach, Impact, Confidence, Effort) and a short rationale per field. End with your top 3 and what you would cut entirely.
Get a fast, structured overview of the landscape, and where there is a gap worth going after.
Strategy
I am building in this market: """ [product + target audience + the competitors you know] """ Write a short analysis: 1) the 4-5 most important players and their positioning, 2) what each of them is strong and weak at, 3) the clearest gap nobody owns yet, 4) the angle I can take to stand out. Be concrete, not generic.
An open repo that becomes your product brain in markdown: context, decisions and stakeholders in one place, and an AI coach that challenges your thinking before it helps with the doc. Works with Claude Code, Cursor and ChatGPT. By Andreas Kelm.
By Andreas Kelm
From raw notes to PRDs and user stories developers can use.
Find the holes in a spec before the developers do, with a skeptical product partner.
PRD
You are a skeptical senior product manager. Read my PRD below and pressure-test it. Find: unresolved assumptions, missing edge cases, success metrics that are not measurable, and scope that should be cut. Ask the five most important questions I have not answered. Be concrete and critical, not polite. PRD: """ [paste your PRD here] """
Turn scattered notes, Slack threads and requests into a first draft of a Product Requirements Document you can edit.
PRD
You are a senior product manager. Here is raw input for a feature (notes, Slack, requests): """ [paste all the raw material] """ Write a first draft of a PRD with: problem, goal + success metric, target audience, scope (in/out), user flow in bullet points, open questions. Keep it short and sharp. Mark where you have guessed, so I know what to verify.
Break a feature down into user stories with clear acceptance criteria, ready for development.
PRD
Here is the feature: """ [describe the feature + who it is for] """ Write it as user stories in the format "As a [role] I want [goal], so that [value]". Per story: 3-5 acceptance criteria in Given/When/Then, and a note on edge cases that are easily forgotten. Sort the stories so they can be delivered in thin, testable slices.
Prototypes, code and tests, even if you're not a developer.
Take a screenshot, draw on it, hit Enter. The image lands in your Claude, ChatGPT or Cursor chat, and the model can see the line. Free, for Mac.
Let AI generate test cases from your product, so you catch bugs without a dedicated QA tool.
QA
You are the QA lead. Based on the description of this feature: generate a prioritized list of test cases (happy path, edge cases, error states). For each: steps, expected result, and how likely a break is. Mark the five cases I should run first if I only have 30 minutes. Feature: """ [describe the feature] """
Say "read this aloud", and Claude strips the markdown, code blocks and URLs out of whatever you are looking at and speaks the prose in a native Danish voice. Built for proofreading by ear: an essay that reads fine on screen often falls apart when you hear it. The voice picker works for any language, but the skill was written for Danish. macOS only.
Build
# Get the skill and enable it in Claude Code: git clone https://github.com/martinibsen/laes-op.git ~/Projects/laes-op ln -s ~/Projects/laes-op/laes-op ~/.claude/skills/laes-op # Run setup once. It asks for your own ElevenLabs key, # plays voice samples, and saves your choice: cd ~/Projects/laes-op/laes-op && ./setup.sh # After that, just say "read this aloud" to Claude. # Stop mid-playback with: killall afplay
Turn a PRD into a sharp build prompt you can hand to Lovable, v0 or Cursor.
Build
Here is my PRD (or feature description): """ [paste PRD] """ Turn it into one clear build prompt for an AI tool (Lovable/v0/Cursor): describe what needs to be built, the key screens/components, the rough data model, and 3-5 acceptance criteria the prototype must meet. Keep it focused on a v1 that can be tested with users, not a finished product.
A standing instruction that turns your AI into a technical sparring partner who pushes back and drives the build. From my blog post.
Build
**What is your role:** - You are acting as the CTO (your name is Ib) of [PRODUCT NAME]. Tech stack: [DESCRIBE YOUR STACK HERE]. - You are technical, but your role is to assist me (head of product) as I drive product priorities. You translate them into architecture, tasks, and code reviews for the dev team. - Your goals are: ship fast, maintain clean code, keep infra costs low, and avoid regressions. **We use:** [PASTE YOUR TECH STACK HERE, example:] - Runtime: Node ≥18 - Framework: Next.js 16 (App Router) - Language: TypeScript - UI: React 19 - Styling: Tailwind CSS - ORM: Prisma - Database: PostgreSQL - Auth: NextAuth - AI: OpenAI SDK, Anthropic SDK - State: Zustand - Analytics: PostHog - Test: Playwright, Vitest **How I would like you to respond:** - Act as my CTO. You must push back when necessary. You do not need to be a people pleaser. You need to make sure we succeed. - First, confirm understanding in 1-2 sentences. - Default to high-level plans first, then concrete next steps. - When uncertain, ask clarifying questions instead of guessing. [This is critical] - Use concise bullet points. Link directly to affected files / DB objects. Highlight risks. - When proposing code, show minimal diff blocks, not entire files. - When SQL is needed, wrap in sql with UP / DOWN comments. - Suggest automated tests and rollback plans where relevant. - Keep responses under ~400 words unless a deep dive is requested. **Our workflow:** 1. We brainstorm on a feature or I tell you a bug I want to fix 2. You ask all the clarifying questions until you are sure you understand 3. You create a discovery prompt for the dev agent gathering all the information needed to create a great execution plan (including file names, function names, structure and any other information) 4. Once I return the response you can ask for any missing information I need to provide manually 5. You break the task into phases (if not needed just make it 1 phase) 6. You create prompts for each phase, asking the dev agent to return a status report on what changes it makes in each phase so that you can catch mistakes 7. I will pass on the phase prompts and return the status reports
The skills framework I use the most. It forces the AI through a disciplined process: idea → spec → plan → execution, with TDD and debugging built in. Created by Jesse Vincent (obra).
By Jesse Vincent
Made byJesse Vincent
# Install superpowers in Claude Code (run inside Claude Code, restart afterwards): /plugin marketplace add obra/superpowers-marketplace /plugin install superpowers@superpowers-marketplace # Tip: add --global to enable it across all projects.
An open skills framework for Claude Code/Cowork built on classic PM methods. The PM counterpart to superpowers. By Dean Peters.
By Dean Peters
Gives Claude a searchable design database: 50+ UI styles, 97 color palettes, 57 font pairings, 99 UX guidelines and 25 chart types. For the non-technical builder who wants something that does not look like default AI slop.
By Next Level Builder
A refactor round focused on simplicity after changes. Remove dead code, straighten out logic, and verify with build/tests.
By Mikkel Malmberg
Made byMikkel Malmberg
name: refactor-pass description: Perform a refactor pass focused on simplicity after recent changes. Use when the user asks for a refactor/cleanup pass, simplification, or dead-code removal and expects build/tests to verify behavior. # Refactor Pass ## Workflow 1. Review the changes just made and identify simplification opportunities. 2. Apply refactors to: - Remove dead code and dead paths. - Straighten logic flows. - Remove excessive parameters. - Remove premature optimization. 3. Run build/tests to verify behavior. 4. Identify optional abstractions or reusable patterns; only suggest them if they clearly improve clarity and keep suggestions brief.
Updates leadership actually reads.
Turn messy weekly notes into a sharp update leadership actually reads.
Stakeholder
Here are my raw notes from the week: """ [paste notes] """ Write a short stakeholder update: 1) what we achieved, 2) what we learned, 3) what is blocked + what I need, 4) next steps. Max 150 words, concrete, no filler. Start with the most important sentence at the top.
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Every product person I talk to is building products and new flows with AI. But there is no overview, so this is where we collect them. Send yours in, and it goes up with your name.
What AI is changing in UX Report Nine Danish design leaders on what gets easier, what gets harder, and what a designer has to be able to do now. Free. 9 named professionals · five chapters · PDF Read the report
One concrete tip a week for Product Managers, Product Owners, Product Designers and Heads of Product. Written in Danish.
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