Complexity: Beginner
Time: ~2 hours
Key Takeaway: How Plan prevents scope creep
You need to build a landing page for a new SaaS product. The founder has a vague brief: “Make it look modern, have a hero section, features, pricing, and a CTA.”
Without PUDO, this turns into 4 hours of back-and-forth with AI, changing fonts, moving sections around, and ending up with something that looks “fine” but took way too long.
With PUDO, you ship in 2 hours with a page that exceeds expectations.
I need to build a product landing page for a SaaS analytics tool called "Insightful."
Scope:
- Hero section with headline, subtitle, CTA button
- 3-column feature grid with icons
- Pricing section with 3 tiers (Free, Pro, Enterprise)
- Footer with links and social icons
Constraints:
- Single-page HTML/CSS/JS (no framework)
- Dark theme with gradient accents
- Mobile-responsive (breakpoints at 768px and 480px)
- Must load in under 2 seconds
Out of scope:
- Backend/API
- User authentication
- Blog section
Create an implementation plan before writing any code.
An implementation plan covering:
You review the plan, adjust the color palette, and approve. Total time: 10 minutes.
Why this matters: Without this step, the AI would have guessed at everything. You’d spend the Develop phase undoing decisions you didn’t agree with.
This is a greenfield project, so the Understand phase is lighter. But it’s not empty:
Before we build, research:
1. Current landing page design trends (2025-2026)
2. Best practices for above-the-fold conversion
3. Accessible color contrast ratios for dark themes
You update the plan to use a bento grid for features and ensure the CTA button uses a high-contrast accent color. Total time: 10 minutes.
- [x] Set up file structure (index.html, styles.css, script.js)
- [x] Build design system (CSS custom properties: colors, fonts, spacing)
- [x] Hero section with animated gradient background
- [x] Feature grid (bento layout, 3 items)
- [x] Pricing cards (3 tiers with hover effects)
- [x] Footer with social links
- [x] Mobile responsiveness
- [x] Scroll reveal animations
You work through the checklist top-to-bottom. The AI generates each section, you review the code, test it in the browser, and approve or request changes.
Key moment: The AI generates a pricing section with a toggle for monthly/annual billing. This wasn’t in the plan. You say:
Good idea, but that's out of scope for v1. Stick to the plan —
we can add the toggle in the next cycle.
Total time: 90 minutes.
Why this matters: The plan gave you a clear boundary to say “no” to scope creep. Without it, you’d have added the toggle, then a testimonials section, then a blog, and shipped at midnight.
Review the implementation:
1. Run a Lighthouse audit — target 90+ on all scores
2. Check accessibility (contrast ratios, alt text, keyboard nav)
3. Compress all images (WebP format)
4. Review CSS for unused rules
5. Write a walkthrough summarizing the build
| Metric | Before | After |
|---|---|---|
| Performance | 82 | 95 |
| Accessibility | 88 | 100 |
| Best Practices | 92 | 100 |
| SEO | 90 | 100 |
| Page Size | 1.2 MB | 340 KB |
Total time: 20 minutes.
| Phase | Time | Value |
|---|---|---|
| Plan | 10 min | Prevented 3 scope creep moments |
| Understand | 10 min | Caught accessibility issue early |
| Develop | 90 min | Clean, systematic build |
| Optimize | 20 min | Lighthouse went from 82 → 95 |
| Total | 130 min | Shipped with confidence |
Without PUDO (estimated): 3–4 hours, lower quality, accumulated scope creep, no documentation.
Key lesson: The Plan phase doesn’t slow you down — it speeds you up by eliminating indecision during development.