How to Write Your First PRD

Many indie builders dislike writing PRDs. They think PRDs are for product managers in large companies. When one person builds the product, the idea is already in their head, so coding feels faster. But then requirements, pages, flows, data, boundaries, and pricing are decided while building. Direction keeps changing, and the original validation goal gets forgotten.

The value of a PRD is not producing a thick document or looking professional. Its value is making product decisions explicit: who the product serves, what problem it solves, what result version one delivers, what it will not do, and how success will be judged. For indie builders, a PRD should be short, but the key decisions cannot be missing.

Your first PRD should not aim for template completeness. It should create action clarity. It should work like a construction note that tells you, or your AI coding tool, what to build, what not to build, what comes first, and what counts as done.

Start With the Problem, Not Features

Many PRDs begin with a feature list: login, homepage, generation, export, history, payment, admin panel. This looks concrete, but it can easily drift because it does not explain why users need those features.

A good PRD begins with the problem. Who is the target user? In what scenario do they struggle? How do they solve it now? Where do current solutions fail? What cost appears if the problem is not solved? These answers decide every later feature decision.

Do not write “build a competitor monitoring feature.” Write “Shopify sellers manually check 10 competitor stores every week, copy product launches and price changes into a spreadsheet, spend 2 hours, and still miss important changes.” Once the problem is clear, the feature set becomes more focused.

The first goal of a PRD is to stop you from forgetting why the product exists.

Define the Core Result for Version One

The most important sentence in a PRD is what version one delivers. Not the long-term vision, not the roadmap, but what the user receives after first use. The more specific the result, the less likely development drifts.

Use this sentence:

Version one only helps [target user] get [core result] in [specific scenario].

For example: “Version one only helps indie builders generate a launch checklist before releasing a product.” With this sentence, you can judge what not to build. Team collaboration, history, template marketplaces, and auto-scheduling may be useful later, but version one is not about them.

The core result is also the acceptance standard. If users can get this result, version one can launch for validation. If they cannot, other features do not matter.

Write the User Flow, Not Only Pages

Pages are static. The user flow is what the user actually experiences. Your first PRD does not need a complex diagram, but it must describe the steps from entry to result.

For example: user opens the page, chooses product type, enters launch date, clicks generate, sees checklist, copies or downloads, and leaves email for reminders. For each step, note what the user inputs, what the system outputs, and what happens on failure.

Once the flow is written, you will see which pages are unnecessary and which edge cases are hidden. What if the user does not enter a date? What if generation fails? What if the result is too long? Can users export without login? If these are not written early, they interrupt development later.

A PRD does not need legal-level detail for every button, but the core path must be clear. The clearer the path, the faster the build and the easier the test.

Define What Not to Build

The most commonly missing part of a first PRD is the “not doing” list. Without it, scope expands constantly. Every useful idea can enter, and version one becomes too big again.

The not-doing list can be simple: no login, no team collaboration, no history, no online payment, no multilingual support, no complex admin panel, no custom templates. Once written, it helps resist feature impulses during development.

Not doing now does not mean never doing. Put those ideas into later versions. This preserves ideas while protecting the boundary of the current version.

For indie builders, the not-doing list is often more important than the feature list. The feature list tells you what to build. The not-doing list stops you from building too much.

Write Success Metrics

The PRD should end with success metrics. Without metrics, you judge the launch by feeling: the page looks good, friends say it is useful, some visitors arrived. These are not clear enough.

First-version metrics can be simple: how many users complete the core action, leave an email, return, pay, or reply with feedback. You do not need many metrics, but they must connect to the core hypothesis.

For a launch checklist tool, metrics might be: 100 target-user visits, 30 generated checklists, 10 copies or downloads, 5 email signups, and 3 feedback replies. If these behaviors do not appear, the problem, message, channel, or result needs adjustment.

Metrics turn the PRD from “what I will build” into “what I will validate.” That is the real value of an early PRD.

A Minimal PRD Template

Your first PRD can have only 8 parts:

1. Background: why build it
2. Target user: who it serves
3. User problem: what pain appears in what scenario
4. Core result: what version one delivers
5. User flow: how users complete the result
6. Scope: what this version builds
7. Out of scope: what this version does not build
8. Success metrics: what data to watch after launch

This PRD does not need to be long. Three to five lines per part is enough. The goal is not covering every detail. It is making the boundary clear and reducing rework.

If you use AI to help build, this PRD is especially useful. AI struggles with vague requirements. A clear PRD helps it generate code, pages, and data structures closer to the real goal.

Summary

Your first PRD is not a big-company process. It is a tool that prevents drift. It does not need to be thick, but it must be clear. It does not need to be fancy, but it must guide development.

A good PRD answers five questions: who it serves, what problem it solves, what version one delivers, what it will not do, and how success is judged. Once these are clear, product design becomes much steadier than building whatever comes to mind.

Homework

• Write one core-result sentence: version one only helps whom, in what scenario, get what result.
• Write a one-page PRD using the 8 sections above, no more than 5 lines per section.
• List at least 5 features this version will not build.
• Write 3 success metrics to observe in the first week after launch.

Next Lesson

How to Design a User Flow: before connecting pages, map the path users take to reach the result.