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What is a PRD?

Product Requirements Document

A PRD — also called a product spec — is a blueprint that describes what a product should do, who it's for, and how it should work, before a single line of code is written. For vibe coding, it's the difference between getting what you imagined and going round after round of re-prompting. Draftlytic turns a one-line idea into the full spec.

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Why PRDs matter

When you prompt an AI coding tool with just "build me a habit tracker," you get generic code that doesn't match what you had in mind. You end up going back and forth, re-explaining, and losing context with every message.

A PRD changes that. It's a structured spec that tells your AI tool exactly what to build — the features, the priorities, the tech stack, the screens. Tools like Claude Code, Cursor, and Lovable perform dramatically better when you give them a clear, detailed brief instead of a vague prompt. Rather than prompt engineering your way through dozens of iterations, you write the spec once and let the AI execute it properly.

What's inside a PRD

A typical PRD includes these key sections.

Overview

A clear summary of what you're building, who it's for, and why. Gives your AI coding tool the big-picture product vision it needs.

Features & Priorities

A prioritized list of features — must-have, nice-to-have, and future. Each with a title and description so your AI coding tool knows what to build first.

Technology & Architecture

Platform targets, tech stack, navigation flow, and external services. Helps your AI coding tool pick the right frameworks and structure.

Design & UX

Design style, color palette, fonts, UX patterns, and the first thing users should do. Gives your AI coding tool the visual direction.

Market & Business

Target audience, competitors, revenue model, products, and constraints. Rounds out the spec with business context.

Looking for a head start? Browse PRD templates by app type or see a spec tailored to your AI coding tool.

See a real example

Here's what a Draftlytic-generated PRD looks like — exported as a .md file, ready to paste into any AI coding tool.

PRD.md

HabitStack

Product Requirements Document — June 18, 2026

Overview

HabitStack is a minimal habit tracking app that helps you build daily routines through streaks, gentle reminders, and simple progress charts. Built for personal use — no social features, no accounts to manage, just you and your habits.
It solves a simple problem: most habit trackers are bloated with social features and premium upsells when all you really need is a clean way to track daily habits and see your streaks. The app focuses on speed and simplicity — adding a habit takes seconds, checking it off takes one tap, and your progress is always visible at a glance.

Features

Must Have
1. Habit Creation
Create habits with a name, icon, and target frequency (daily, weekdays, custom days).
Products: Free, Pro
Acceptance criteria:
- User can name a habit and pick from preset icons
- Frequency picker supports daily, weekdays, and a custom-days mode
- Saving a habit returns to the dashboard with the new habit visible
2. Daily Check-In
One-tap completion for each habit. Visual feedback with streak count and completion percentage.
Products: Free, Pro
Acceptance criteria:
- Tapping a habit toggles today's completion in under 100 ms
- Streak count and completion percentage update without a page reload
- Undo is available for the last toggle
3. Streak Tracking
Current streak, longest streak, and weekly/monthly completion rates displayed on a simple dashboard.
Products: Free, Pro
Acceptance criteria:
- Current streak displayed on each habit card
- Streak resets to 0 if a scheduled day is missed
- Longest streak tracked separately and surfaced in habit detail view
4. Progress Charts
Clean bar and heatmap charts showing completion history over the last 30, 60, or 90 days.
Products: Pro
Acceptance criteria:
- Chart renders in under 500ms for 90 days of data
- User can switch between 30 / 60 / 90-day views
- Completion percentage shown above the chart
Nice to Have
1. Gentle Reminders
Optional push notifications at custom times for each habit.
Products: Pro
2. Habit Categories
Group habits by category (health, learning, creative) with color-coded labels.
Products: Pro
Future
1. Data Export
Export habit history as CSV for personal analytics or backup.
Products: Pro
Completed
1. Auth / signup flow
Email + password authentication with email verification. Sets up user accounts so habits can be saved per-user. Persisted via Supabase Auth.
Products: Free, Pro

Design

Navigation Pattern
top_nav
Onboarding Pattern
progressive
Design Style
Copy Tone
Minimal and clean
Friendly & casual
Colors
Fonts
#6366f1 · #10b981 · #f59e0b
Header: Space Grotesk · Sub: DM Sans · Body: Inter
UX Patterns
First User Action
Dashboard, Notifications
Create your first habit with a name and target frequency

Technology

Platforms
- Web — Responsive web app (works on desktop and mobile browsers)
- iOS — Native iPhone and iPad app (future v2 consideration)
Technology Stack
- React / Vite / Tailwind — Frontend framework and styling
- Supabase — Auth, database, and edge functions
- Vercel — Frontend hosting with preview deployments

Architecture

Navigation Flow
Legend:
- Screen types: page (full view), modal (overlay dialog), component (reusable UI element), external (third-party service)
- Connection types: navigation (user moves between screens), action (user triggers an operation), redirect (automatic reroute), conditional (depends on state/logic)
Screens:
- Dashboard / Home (page) — Main habit overview
- Habit Detail (page) — Individual habit tracking
Endpoints: GET /api/habits/:id, POST /api/habits/:id/checkins
- Progress Charts (page) — Visual progress analytics
- Settings (modal) — App configuration
Screen Flow:
- Dashboard / Home (page) → Habit Detail (page) [navigation "View habit details"]
- Dashboard / Home (page) → Progress Charts (page) [navigation "View analytics"]
- Dashboard / Home (page) → Settings (modal) [action "Open settings"]
Edge case: No connection — queue setting changes locally and sync when back online
- Habit Detail (page) → Progress Charts (page) [navigation "View habit progress"]
Authentication
email_password, magic_link
Notification Channels
push
Collaboration
single_user
Data Model
Habit
Field
Type
Notes
id
uuid
Primary key
name
text
User-facing label
icon
text
Lucide icon name
frequency
enum
daily / weekdays / custom
custom_days
array
0–6 weekday indices when frequency=custom
created_at
timestamp
Defaults to now()
CheckIn
Field
Type
Notes
habit_id
uuid
Foreign key → Habit.id
date
date
The day this check-in covers
completed
boolean
True when toggled on
Notifications
- Daily reminder — Push notification at the user's chosen time for each habit
- Streak milestone — Local notification when a habit hits 7, 30, or 100 days
Admin Panel
Minimal (view users/data)
External Services
- Supabase — Auth and database
- Firebase Cloud Messaging — Delivers scheduled push notification reminders for daily habit check-ins

Market

Audience Model
- **Type:** B2C (Individual consumers)
- **Launch scale:** 100–1k users
Customers
- Personal users — Anyone who wants to build better daily routines without the complexity of a full productivity suite
- Productivity enthusiasts — People who track OKRs, morning routines, and deliberate practice using apps like Notion or Obsidian
- Health-focused users — Individuals building wellness habits around exercise, sleep, and nutrition who want a lightweight tracker without a full fitness app
Personas
- Maya, 31, product designer — Wants a frictionless way to keep her morning routine consistent. Bounces off Habitica because the RPG layer feels infantile.
- Jordan, 24, CS student — Tracks deliberate-practice sessions and wants a clean weekly view, not a productivity bundle.
- Priya, 38, parent of two — Builds wellness habits around exercise and sleep; values privacy and offline-first behaviour.
Competitors
- Habitica — Gamified habit tracker with RPG mechanics. Heavy on social features and complexity — opposite of what HabitStack is.
- Streaks — Minimalist iOS habit tracker with great UX. iOS-only, no web app or cross-platform support.
- Google Tasks — Built into Google Workspace but has no streak tracking, habit cadence, or progress charts.

Business

Revenue Model
- Freemium
Products
- Free — USD 0
- Pro — USD 3 / month
Constraints
Scope: MVP is web-only. Mobile app version is a future consideration.
Timeline: 2026-06-01
Budget: 500 USD
Additional Constraints:
- Offline Support — Daily check-ins should work offline and sync when back online
- Privacy First — No analytics tracking, no data sharing, no social features
Non-Goals
- No social or community features (friend lists, leaderboards, shared habits)
- No Apple Watch or wearable integrations
- No calendar sync (Google Calendar, Apple Calendar, etc.)

Generated from a single prompt. Your PRD will be tailored to your idea.

Benefits of writing a PRD

  • Gives AI coding tools the full context they need to generate accurate, complete code — not half-finished guesses.
  • Stops the "build me X" → "no, not like that" loop with your AI coding tool.
  • Helps you think through features, priorities, and tech choices before writing a single line of code.
  • Keeps your vision clear so AI doesn't generate features you never asked for.
  • Saves hours of back-and-forth by giving your AI coding tool everything upfront.

PRDs and AI-assisted development

AI coding tools are only as good as the context you give them. When you tell Claude Code "build me a habit tracker," you get a generic app. When you give it a spec with your exact features, priorities, and tech stack, you get something that actually matches what you imagined.

That's exactly why Draftlytic exists as a product requirements document generator for AI project planning. It takes you from a rough idea to a complete product spec in minutes, then exports it in a format your AI coding tool can immediately act on. You control the depth — Brief for a quick overview, Standard for a solid spec, or Detailed for a comprehensive plan that covers every edge case. Better spec in, better code out.

See the tool-specific guides for Claude Code, Cursor, and Lovable.

Draftlytic — a product requirements document generator for vibe-coders

Draftlytic is a product requirements document generator built specifically for indie developers and vibe-coders. Instead of manually writing specs from scratch, you describe your idea and AI produces a structured PRD in minutes — covering features, tech stack, target audience, and more.

PRDs vs prompt engineering

Prompt engineering — crafting ever-more-precise prompts to coax better output from an AI coding tool — is time-consuming and fragile. A product requirements document solves the same problem structurally: write the spec once, feed it to any AI tool, and skip the back-and-forth entirely. If you want to go deeper on the topic, read our guide on prompt engineering and how PRDs complement it.

Want to see exactly what a finished spec contains? Read our section-by-section tour of an exported PRD.

What is PRD-driven development?

PRD-driven development means the spec comes first and the code comes second. You write down what you're building — features, priorities, stack, audience — and then your AI coding tool builds against that document instead of against a prompt you improvised at 11pm.

It's the same instinct as test-driven development, one layer up. TDD says define the expected behaviour before the implementation. PRD-driven development says define the expected product before the behaviour. Both trade five minutes of thinking for an hour of not rewriting.

The alternative is what most people actually do: prompt, look at what came back, prompt again to fix it, and slowly discover the requirements by watching the AI get them wrong. That works until the app has more than a handful of features — then every new prompt quietly contradicts an earlier decision the AI has already forgotten.

In practice the loop looks like this:

  • Write the PRD once — or generate it, then edit the parts the AI guessed wrong.
  • Hand the whole spec to your coding tool as context, not a paraphrase of it.
  • Build feature by feature in priority order, checking each one against what the spec said.
  • When the plan changes, change the PRD first — so the document stays the thing that's true.

We wrote up the longer argument in spec-first vs prompt-and-pray.

What is a PRD file (prd.md)?

A PRD file is the spec saved as something you can open, share, and hand to a tool. For AI coding work that file is almost always prd.md — Markdown, living in the repo.

The format choice isn't taste. Headings, nested lists and priority labels survive as structure in Markdown, so the model reads "these four features are must-have, these two are future" rather than one long paragraph of intent. Hand over the same spec as a PDF and most of that shape is gone before the model sees it.

Where the file lives matters as much as what's in it. Keep it in the project — prd.md at the root, or docs/prd.md — so you can point your tool at it on any request and so changes to the plan show up in diffs like everything else. How much a tool picks up on its own varies: some read repo files as context automatically, others only when you reference the file, so check your tool's docs rather than assuming. Either way, a file in the repo beats a spec you pasted into a chat two hours ago and have since scrolled past.

Paid Draftlytic plans push the .md straight to a GitHub repo, so the spec lands next to the code instead of in your downloads folder.

Export as Markdown, PDF, or Word doc

Once your PRD is ready, Draftlytic lets you export it in three formats — each suited to a different audience.

Markdown — for AI tools

Plain text that AI coding tools parse perfectly. Drop the .md file into Claude Code, Cursor, or Lovable and it immediately understands your features, tech stack, and priorities. On paid plans you can also push it straight to a GitHub repo — handy when your AI coding tool reads from the repo.

PDF — for people

A polished, styled document with your project's accent colors, priority badges, and page numbers. Share it with collaborators, clients, or keep it as a reference for yourself.

Word doc — for editing

The same content as Markdown in a .doc file you can open in Microsoft Word, Google Docs, or Apple Pages — handy when a collaborator wants to edit it without seeing markup.

All three formats let you choose which sections to include, add your project logo, and edit the content before exporting.

Frequently asked questions

What does PRD stand for?

PRD stands for Product Requirements Document — that's the full PRD meaning. It's sometimes called a product spec or product brief — all three mean the same thing: a structured document that describes what you're building, who it's for, and how it should work.

What is a PRD?

A PRD (Product Requirements Document) is a blueprint you write before building anything. It covers your app's features, priorities, tech stack, target audience, and business model. For indie devs and vibe-coders, it's the spec you drop into Claude Code, Cursor, or Lovable so the AI builds exactly what you imagined — not a generic version of it.

What is a PRD file?

A PRD file is simply a PRD saved as a document — usually Markdown (.md), PDF, or Word (.doc). Draftlytic exports your spec in all three formats. The .md file is the most useful for AI coding tools: you paste or push it into your tool and it reads your features, stack, and priorities directly.

What is the full form of PRD in software?

The full form of PRD is Product Requirements Document. In software it means the same thing it means anywhere else: a written description of what you're building and why, ahead of building it. You'll also see it written as a product spec, a product brief, or just prd.md if someone means the file in the repo.

What is a PRD in software development?

In software development a PRD is the document the build works from — features and their priority, the tech stack, who the users are, and what's explicitly out of scope. Traditionally a product manager wrote it for a team of engineers. If you're building solo with an AI coding tool, the tool is the team, and the PRD is how you brief it once instead of re-explaining the project in every prompt.

Is a 'PRD doc' the same thing as a PRD?

Yes — "PRD doc" just means the PRD written down as an actual document, usually Markdown, PDF, or Word. People say "PRD doc" when they want to be clear they mean the file itself, not the abstract idea of requirements. Draftlytic generates the PRD doc for you and exports it in all three formats.

Is a PRD the same as a spec or brief?

Close enough that the terms are used interchangeably. PRD is the classic product-management term. Spec (short for specification) is more common in engineering contexts. Brief is the creative/agency word. Draftlytic generates what engineers call a spec and what product managers call a PRD — the document is the same either way.

Do I need a PRD for a solo project?

Yes — especially when you're using an AI coding tool. A PRD forces you to think through features and priorities before writing any code, and gives the AI full context so it doesn't fill in the blanks with generic assumptions. Even a brief 10-minute spec saves hours of back-and-forth later.

What is PRD-driven development?

PRD-driven development means writing the spec before you write code — the same idea as test-driven development, but the PRD is the thing you write first instead of the test. You describe features, priorities, and tech choices upfront, then let your AI coding tool build against that spec instead of a loose prompt. It's slower for the first five minutes and dramatically faster for everything after.

Is there such a thing as PRD software?

Two different things get called that. One is a tool that writes the PRD for you — that's what Draftlytic is: you describe an idea and it generates a structured spec you can edit and export. The other is a PRD written about a piece of software, which is the normal case: almost every PRD is a software PRD. If you're looking for the first, you don't need a document template, you need something that asks the right questions and fills in the structure.

How long does it take to create a PRD with Draftlytic?

Most people get a complete spec in under 10 minutes. Describe your idea, optionally answer a few guided questions to sharpen the details, and the AI generates a structured PRD with features, tech stack, audience, and more. You can edit and reorder everything before exporting.

Keep reading

PRD templates by app type

Ready-made specs for SaaS, marketplaces, mobile apps, and more.

PRD for your AI coding tool

See how a spec maps onto Cursor, Claude Code, Lovable, and others.

PRD vs spec vs brief

Which one your AI coding tool actually needs.

Inside an exported PRD

A section-by-section tour of a finished spec.

Create your first PRD in minutes

Describe your idea. Draftlytic handles the rest. Start for free — no credit card required. Need more depth? Check out our Starter, Plus, and Pro plans.

Start for free