Web-to-PRD Skill

Scan a live web app. Extract every feature. Turn it into a structured PRD with epics, stories, and tasks. Push it all to Notion.

When to Use

• Reverse-engineer a competitor's product
• Document an existing app you're taking over
• Create a PRD from a live product (yours or someone else's)
• Build a feature backlog from scratch by looking at what's already built

What This Skill Does

1. Checks prerequisites — makes sure Playwright MCP and Notion MCP are connected
2. Crawls the web app — navigates page by page, reads UI elements
3. Extracts features — groups what it finds into feature areas
4. Generates PM artifacts — PRD, epics, stories, tasks with priorities and dependencies
5. Exports to Notion — creates linked databases, populates everything

Prerequisites

This skill needs 2 MCP servers. The command checks both before starting.

1. Playwright MCP (browser control)

Claude uses Playwright to open a real browser, navigate pages, and read content.

Browser modes

Default setup: Persistent profile (auto-installed by the command)

The /spartan:web-to-prd command handles installation itself. Uses a lightweight separate profile at ~/.playwright-profile — no extensions, no bloat, fast startup.

What the command does internally:

bash
1claude mcp remove playwright 2>/dev/null || true
2claude mcp add playwright -- npx @playwright/mcp@latest --user-data-dir="$HOME/.playwright-profile" --browser=chrome

First run on a login-protected site: Playwright opens Chrome with a clean profile. User logs in manually. Cookies are saved to ~/.playwright-profile. Next runs are already logged in.

Why not the real Chrome profile? Real Chrome profiles load ALL extensions (AdBlock, LastPass, password managers, etc.). These add latency, block requests, and often cause Playwright to timeout or hang. A separate profile is faster and more reliable.

Chrome can stay open. Since we use a separate profile, there's no conflict.

Switching modes

To change mode, remove and re-add:

bash
1claude mcp remove playwright
2claude mcp add playwright -- npx @playwright/mcp@latest [flags]

All Playwright MCP flags

All flags also work as env vars with PLAYWRIGHT_MCP_ prefix (e.g., PLAYWRIGHT_MCP_CDP_ENDPOINT).

How to verify Playwright MCP is installed:

bash
1claude mcp list | grep -i playwright

What it gives you: browser_navigate, browser_click, browser_snapshot, browser_type, browser_tab_list and more.

2. Notion MCP (export destination)

Claude uses Notion MCP to create databases, pages, and views in your workspace.

How to install: The Notion MCP is available as a Claude.ai integration. Enable it from:

• Claude Code settings > MCP servers
• Or Claude Desktop > Settings > Integrations > Notion

How to verify:

bash
1claude mcp list | grep -i notion

What it gives you: notion-create-database, notion-create-pages, notion-create-view, notion-search, notion-update-page.

Optional: Firecrawl MCP (faster crawling)

If the user has Firecrawl, use it instead of Playwright for the initial crawl. It's faster but costs money.

bash
1claude mcp add firecrawl -- npx firecrawl-mcp

Firecrawl is optional. Playwright alone handles everything.

Prerequisite Check Logic

Run this check at the start.

IMPORTANT: claude mcp add/remove does NOT make tools available mid-session. MCP tools only load when Claude Code starts. Never try to install or reconfigure MCP servers during a running session — it won't work and wastes time.

CHECK 1: Playwright MCP
  A) Try calling any Playwright tool (e.g., browser_snapshot or browser_navigate)

  If tool works → check the config:
     Read .claude.json for playwright args
     If --user-data-dir points to ~/.playwright-profile → good, proceed
     If --user-data-dir points to real Chrome profile → warn user (extensions cause timeouts)
     If no --user-data-dir (clean mode) → OK for public sites
     If --cdp-endpoint → good, proceed

  If tool NOT found → Playwright MCP is not loaded. Show this message and STOP:

     "Playwright MCP is not available. I need it to open a browser.

     Run this in your terminal (outside Claude Code):
       claude mcp add playwright -- npx @playwright/mcp@latest --user-data-dir=$HOME/.playwright-profile --browser=chrome

     Then restart Claude Code and run /spartan:web-to-prd again."

  NEVER run `claude mcp add` or `claude mcp remove` yourself during the session.
  It changes the config file but won't load the tools until restart.

CHECK 2: Notion MCP (OPTIONAL — not a blocker)
  Try calling notion-search with a simple query
  If found → great, will export to Notion at the end
  If not found → note it, will save PRD locally instead. Continue with crawl.

Playwright OK → proceed to crawl

Notion is optional. The PRD is always saved locally. Notion export is a bonus step at the end.

Crawl Strategy

Step 0: Clean up stale lock files (before every run)

Stale lock files from previous browser sessions can cause "Opening in existing browser session" errors. Only remove lock files — never kill processes:

bash
1rm -f "$HOME/.playwright-profile/SingletonLock" \
2      "$HOME/.playwright-profile/SingletonCookie" \
3      "$HOME/.playwright-profile/SingletonSocket" 2>/dev/null
4echo "Browser cleanup done"

WARNING: Do NOT run pkill -f "playwright-profile" — it kills the Playwright MCP server process too, disconnecting all browser tools mid-session.

If navigate still fails after cleanup → retry once after 2 seconds. If still fails → user needs to restart Claude Code.

Step 1: Login FIRST (mandatory before crawling)

Never start crawling without confirming access. Login is Step 1, not an afterthought.

1. Navigate to the target URL
2. Take a snapshot — check for login signals (form fields, "Sign in" text, /login URL)
3. If login page:
   • STOP. Tell user: "Login page detected. Please log in in the browser window. Tell me when done."
   • Wait for user confirmation
   • Take snapshot to verify — still login page? Ask again. See dashboard? Proceed.
   • Repeat until logged in. Do NOT start crawling from a login page.
4. If already logged in (or public site):
   • Show the user what sections are visible
   • Ask: "Does this look like full access? Any sections I'm missing?"
   • Wait for confirmation before crawling

Session expiry during crawl: If redirected to login mid-crawl → STOP, tell user to re-login in the browser, wait for confirmation, then continue where you left off.

Security rules:

• Never use browser_type to enter passwords — user types directly in the browser
• Never ask for credentials in chat
• Never screenshot login pages
• SSO/OAuth popups work normally — just wait for user to complete

Cookies: With persistent profile (~/.playwright-profile), logins are saved. Next run on the same site = already logged in.

Step 2: Two-pass crawl

Pass 1 — Map all pages (breadth-first): Visit every nav link, take a screenshot, note the page type, go back. Build a complete sitemap. Don't explore features deeply yet. Go back to home between sections. Show the sitemap to user and ask if anything is missing.

Pass 2 — Deep exploration (exhaust every feature): Go through each page from the sitemap. On each page: try EVERY interactive element until there's nothing left to try. Click a button → opens a modal? → what's in the modal? → has a form? → what fields? → has a submit button? → what happens after submit? → follow every path until you hit a dead end or a page you already explored. Only move to next page when you've exhausted all interactions on this page. The goal is to discover features that are 2-3 levels deep — hidden behind tabs, modals, sub-pages, or conditional UI.

Screenshots (mandatory)

Take a screenshot of every page and every important UI state. Save to .planning/web-to-prd/screenshots/ with names like 01-homepage.png, 02-dashboard.png, 07-create-modal.png. Include screenshot references in each Epic. Never screenshot login pages.

For SPAs (single page apps)

SPAs don't have traditional page URLs. Use this approach:

1. Start at the root URL
2. Read the navigation/sidebar for all sections
3. Click each section, wait for content to load
4. Take snapshot after each navigation
5. Track visited states by URL hash or path changes

Crawl depth limits

After every 10 pages, show progress:

"Scanned 10/~25 pages. Found 3 feature areas so far. Continue?"

Coverage Check (mandatory before generating PRD)

After crawling, show a coverage report: pages visited, screenshots taken, buttons clicked, modals found, forms found, tabs explored, filters tested. List all nav sections and mark which were explored vs skipped.

Fail if: any nav section not explored, fewer screenshots than pages, zero modals on a page with buttons (means you didn't click them), any section with only 1 interaction (you only looked, didn't try).

Ask user to confirm coverage before proceeding to PRD generation.

Feature Extraction

What to extract from each page

For every page visited, capture:

yaml
1page:
2  url: "/dashboard"
3  title: "Dashboard"
4  type: dashboard | list | detail | form | settings | landing | auth | empty
5  features:
6    - name: "Revenue Chart"
7      type: data-display | form | action | navigation | filter | notification
8      description: "Line chart showing monthly revenue with date range picker"
9      ui_elements:
10        - chart (line, with tooltips)
11        - date range picker
12        - export button
13      interactions:
14        - hover shows tooltip with exact value
15        - date range filters the data
16        - export downloads CSV
17    - name: "Quick Actions Bar"
18      type: action
19      description: "Row of shortcut buttons: New Invoice, New Client, Reports"
20      interactions:
21        - each button navigates to respective page

Feature grouping rules

After crawling, group features into feature areas (these become Epics):

1. By navigation section — sidebar/navbar sections are natural groupings
2. By user goal — what is the user trying to do?
3. By data domain — features that touch the same data belong together

Example groupings:

Epic: User Management
  - User list with search/filter
  - User profile page
  - User invite flow
  - Role assignment
  - User deactivation

Epic: Billing & Payments
  - Invoice list
  - Create invoice form
  - Payment tracking
  - Subscription management
  - Billing settings

Priority assignment

Assign priority based on visibility and complexity:

Heuristics:

• Main navigation items → P0 or P1
• Settings/config pages → P1 or P2
• Empty states, onboarding → P2
• Social features, sharing → P2 or P3

Dependency mapping

Map dependencies between features:

Epic: Authentication (must build first)
  → Epic: User Management (needs auth)
    → Epic: Team Management (needs users)
      → Epic: Permissions (needs teams)

Epic: Product Catalog (independent)
  → Epic: Shopping Cart (needs products)
    → Epic: Checkout (needs cart)
      → Epic: Order Management (needs checkout)

Rules for dependencies:

• CRUD operations: Create before Read/List before Update before Delete
• Auth is always first
• Data display depends on data input
• Settings depend on the feature they configure

PRD Generation

Structure

Generate a PRD with 8 sections. Each Epic is a mini-PRD — a developer reads one Epic and knows exactly what to build.

1. TL;DR              — 2 sentences, what this app does
2. Goals              — Business goals, user goals, non-goals
3. User Stories        — Grouped by persona/role
4. Epics (mini-PRDs)  — THE MAIN SECTION. Each epic has full detail (see below)
5. User Flows         — End-to-end flows connecting stories across epics
6. Narrative          — 200-word story from user's POV
7. Build Roadmap      — Phased plan with dependency graph
8. Open Questions     — Things that need human input

Section 4 (Epics) is the core. Epics are ordered by build priority (Epic 1 = build first).

Each Epic is a FULL PRD with 6 sections:

Epic N: [Name]
├── 1. TL;DR — what this epic solves, who it's for
├── 2. Goals — business goals, user goals, non-goals
├── 3. User Stories — As a [user], I want...
├── 4. Functional Requirements — every feature with screenshots, UI detail, priority
├── 5. User Experience — entry point, flow (step by step), edge cases, design notes
└── 6. Narrative — 100-word user story for this epic

No epic can skip any section. Every epic gets all 6 sections. This is what makes the PRD actionable — a developer reads one Epic page and knows exactly what to build.

Screenshots are embedded in Section 4 next to the features they show. Not at the end, not as links — inline with the content.

Be as detailed as possible. Describe every button, every form field, every table column, every filter option.

Try EVERY feature. Click every menu, open every modal, test every filter. Missing features = useless PRD.

See the command file (web-to-prd.md) for the full template with examples.

Notion Export

Database Structure

Create a parent page with one sub-page per Epic:

Parent page: "[App Name] — PRD"
├── PRD overview (sections 1-3, 5-8)
├── Epic 1: [Name] (full page with screenshots, features, acceptance criteria)
├── Epic 2: [Name] (full page with screenshots, features, acceptance criteria)
├── ...
└── Optional: Epics overview database (for filtering/sorting, links to pages)

Each Epic = a full Notion page, not a database row with a Description field. Include:

• Full content from the PRD Section 4 format
• Screenshots embedded directly in the page (visible, not links)
• Every feature detail: user story, UI description, step-by-step, acceptance criteria

Screenshots must be uploaded to Notion, not just saved locally. Place them next to the features they document.

Export steps

1. Ask where to put it:

   "Where should I create the backlog in Notion? A) Create a new page in your workspace root B) Add it under an existing page (I'll search for it) C) Just generate the PRD locally, don't push to Notion"

2. Create parent page with the PRD content

3. Create Epics database with all epics

4. Create Stories database linked to Epics

5. Create Tasks database linked to Stories

6. Create views:

   • Kanban view (by Status) for Stories
   • Timeline view (by Phase) for Epics
   • Table view (default) for Tasks

If Notion MCP is not available

Save everything locally:

.planning/web-to-prd/
├── prd.md                    # Full PRD document
├── epics.md                  # All epics with stories
├── dependency-graph.md       # Visual dependency map
└── screenshots/              # Page screenshots (if taken)

User can import to Notion manually later.

Rules

1. Always check prerequisites first. Don't start crawling without confirming both MCP servers.
2. Login before crawling. Never generate a PRD from a login page or public-only view. If the app has login, handle it first. Verify you see the full app before starting.
3. Confirm access level. After login, show the user what sections are visible and ask if anything is missing. A PRD from a limited view is useless.
4. Handle session expiry. If redirected to login mid-crawl, STOP and ask user to re-login. Don't crawl from a login page.
5. Show progress during crawl. Every 10 pages or every major section, update the user.
6. Don't guess features you can't see. Only document what's visible in the UI. Mark assumptions clearly.
7. Ask before clicking destructive actions. If you see "Delete" or "Remove" buttons, don't click them during crawl.
8. Handle errors gracefully. If a page fails to load, note it and move on. Don't stop the whole crawl.
9. Respect rate limits. Add 1-2 second delays between page navigations to avoid being blocked.
10. Screenshots are mandatory. Take them for every page and embed them in the markdown PRD using ![name](path) syntax.
11. Login is the user's job. Never store or ask for production credentials. Use headed mode for manual login.
12. Local save is always available. Even if Notion export fails, the PRD is saved locally.
13. One app per run. Don't crawl multiple domains in a single session.
14. NEVER point --user-data-dir to the real Chrome profile directory (e.g., ~/Library/Application Support/Google/Chrome on Mac, ~/.config/google-chrome on Linux). This can corrupt Chrome profiles, delete saved logins, and break the user's browser. Always use a separate directory like ~/.playwright-profile.