Awesome Deck Pdf

Generate polished HTML slide decks and export as PDF. Works with OpenClaw, Claude Code, and Codex. Supports .pptx templates, images, website URLs, and style...

Karine@karinecsy-collab

Install

openclaw skills install @karinecsy-collab/awesome-deck-pdf

HTML → PDF Slide Workflow

‼️ STOP — Read Before Doing Anything

Before writing a single line of code or HTML, you MUST complete these two confirmation steps in order. Do not proceed until you receive explicit user approval for each.

Confirmation 1 of 2: Design Style

Analyze the user's input (image / URL / keyword / .pptx), then show a design spec summary and ask:

Here's the design style I extracted from [source]:

Background: #000 dark / Accent: #2997FF blue

Font: SF Pro Display, oversized heading, minimal whitespace

Style: dark Keynote, glow effects

Does this match what you want? Any changes before I start?

If the user provided a website URL and fetching fails (Fake IP, login wall, etc.):

Say exactly why it failed
Ask: "Could you send a few screenshots of the site? I'll analyze the design from those."
Do NOT assume or default to any style

Wait for explicit approval → then move to Confirmation 2.

Confirmation 2 of 2: Slide Content

Ask the user if they have existing materials:

Do you have reference materials for the content? (existing PPT, doc, data, bullet points — anything works) If yes, send them over. If not, I'll draft an outline for you to review.

Once you receive a reply, prepare a numbered list: slide title + one-line summary per slide. Show it and ask:

Here's the planned structure — does this look right? Anything to add, remove, or change?

Wait for explicit approval → only then begin generating HTML.

If either confirmation is skipped, the workflow is broken. Start over from Confirmation 1.

export_pdf.js auto-detects Chrome in this order:

Puppeteer bundled Chromium (npm install puppeteer)
System Chrome/Chromium (macOS: /Applications/Google Chrome.app, Linux: /usr/bin/chromium)
If neither found → prints a clear error with install instructions, exits

If npm install puppeteer fails (sandbox/network restriction):

bash

# Option A: skip Chromium download, install separately
npm install puppeteer --ignore-scripts
npx puppeteer browsers install chrome

# Option B: use puppeteer-core (no bundled Chrome download)
npm install puppeteer-core
# script will auto-find system Chrome

# Option C: install system Chrome first, then run script
# macOS: brew install --cask google-chrome
# Linux: sudo apt install chromium-browser
npm install puppeteer-core

Do NOT fall back to wkhtmltopdf, pdfkit, weasyprint, or any other tool.

For full installation instructions across OpenClaw, Claude Code, Codex, and Linux/macOS setup, see references/install.md.

Workflow Overview

text

User input (image / website URL / style keyword / .pptx file)
    ↓ Step 1: Extract design spec → ⚠️ Confirm with user
    ↓ Step 2: Outline slide content → ⚠️ Confirm with user
    ↓ Step 3: Generate HTML → 💾 Save slides.html to disk
    ↓ Step 4: Run export_pdf.js → 💾 Output slides.pdf
    
Both slides.html and slides.pdf must exist as final outputs.

⚠️ Two Mandatory Confirmation Gates (never skip)

Gate 1: Design Style

After analyzing the input, show the extracted design spec summary and ask for confirmation:

Here's what I extracted from [source]:

Background: #000000 black · Accent: #2997FF apple blue

Font: SF Pro Display, oversized centered headline

Style: dark Keynote, glow effects

Does this match the style you want? Any adjustments?

⚠️ If website fetch fails (e.g. Fake IP / login required):

Tell the user clearly why it failed
Ask for screenshots: "Could you send a few screenshots of the site? I'll analyze the design from those."
Never assume or default to any style — wait for user confirmation before proceeding

Website analysis priority:

Puppeteer screenshot → visual analysis (most accurate)
web_fetch page content → CSS/font extraction
Ask user to send screenshots

Gate 2: Slide Content

First ask if the user has existing materials:

Do you have any reference materials for the content? e.g. existing PPT, doc, report, or a list of key points? Send them over and I'll structure the slides — otherwise I'll draft an outline for you to review.

After receiving a reply, prepare a one-line summary per slide and confirm before generating HTML.

Step 1: Extract Design Spec → DESIGN.md

Supported inputs:

Input	Approach
📂 .pptx template	Parse with python-pptx: extract colors, fonts, backgrounds, placeholder layouts (most accurate)
📎 Image / screenshot	Visual analysis: colors, font style, spacing, component patterns
🌐 Website URL	Puppeteer screenshot + `getComputedStyle` font/color extraction
💬 Style keyword	Use brand knowledge: Apple → SF Pro, Notion → Inter, Linear → Inter, Google → Google Sans

Extracting from .pptx:

python

from pptx import Presentation
prs = Presentation("template.pptx")
slide = prs.slides[0]
for shape in slide.shapes:
    if shape.has_text_frame:
        for para in shape.text_frame.paragraphs:
            for run in para.runs:
                print(run.font.name, run.font.size, run.font.color.rgb, run.font.bold)

Fill extracted values into DESIGN.md (see references/DESIGN_TEMPLATE.md):

Colors: primary bg, secondary bg, text colors, accent, border → CSS variables
Fonts: heading / body / decorative number — name, weight, size range per level
Layout: padding, max-width, grid columns, gap, border-radius
Components: card, badge/label, button, divider, background decoration
Section list: CSS class + content theme + dark/light tone per slide

Font extraction by input type:

Input	Method
`.pptx`	`run.font.name` per text run
Website	`getComputedStyle(el).fontFamily` via Puppeteer
Image / screenshot	Visual analysis — describe closest match (e.g. "geometric sans, similar to Helvetica")
Style keyword	Brand knowledge mapping

Fonts go into DESIGN.md as CSS variables. Append Chinese fallbacks at the end (never hardcode them as primary):

css

--font-heading: 'SF Pro Display', 'PingFang SC', 'Helvetica Neue', sans-serif;
--font-body:    'SF Pro Text',    'PingFang SC', 'Helvetica Neue', sans-serif;

Step 3: Generate HTML

⚠️ Save the HTML to a .html file first. Do not merge HTML generation and PDF export into one step. The HTML file is a required intermediate artifact — it must exist on disk before running export_pdf.js.

Generate a single .html file and write it to disk (e.g. slides.html):

Single file, all CSS inlined, zero external dependencies
Each slide = one <section class="...">, fixed width 1440px, height fits content
Fonts from DESIGN.md — Chinese fallback appended, never hardcoded as primary
@media print: page-break-after: always on every section

Font consistency check after saving:

bash

grep -n "font-family" slides.html

Only proceed to Step 3 once the .html file is saved and verified.

Step 4: Export PDF via Puppeteer

⚠️ Only use export_pdf.js (Puppeteer screenshot-and-compose). Do NOT use any of these alternatives — they all produce broken output:

page.pdf() directly → A4 portrait, white space below every slide

wkhtmltopdf → outdated WebKit engine, broken flexbox/grid/modern CSS

Any other HTML-to-PDF CLI (Prince, WeasyPrint, pdfkit, etc.) → layout incorrect

The screenshot-and-compose approach is the only method that faithfully preserves the rendered layout.

Environment matters

Claude Code / Codex / OpenClaw / local agent (can run shell commands):

Read scripts/export_pdf.js, copy it to the project directory, run it:

bash

node export_pdf.js              # reads slides.html → slides.pdf (auto-detects <section> elements)
node export_pdf.js my-deck.html # specify a different file

Claude.ai chat / any chat-only interface (cannot run shell commands):

Your role ends at Step 3: generate the HTML and provide it to the user
Tell the user: "Here's your slides.html. To export the PDF, copy scripts/export_pdf.js from the skill folder to the same directory and run node export_pdf.js."
Do NOT attempt to run Puppeteer, install npm packages, or use any PDF tool in chat

Auto-detection: The script automatically finds all <section> elements in DOM order — no need to manually set SELECTORS. Only configure SELECTORS manually if you need a custom slide order or to merge multiple elements into one slide:

// Optional manual override — leave as [] for auto-detect
const SELECTORS = [
  '.cover',
  '.section-2',
  ['.chart', '.stats'],  // array = merge into one slide
];

See references/export_pdf_guide.md for details.

Troubleshooting

Issue	Fix
PDF has white space / broken layout	Do not use `page.pdf()`, `wkhtmltopdf`, or any CLI PDF tool. Run `export_pdf.js` only — it uses Puppeteer screenshot-and-compose to preserve layout exactly
Chinese text renders as Song/Ming	Add `'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC'` to font stack for cross-platform Chinese support
Inconsistent fonts across slides	Run `grep -n "font-family" slides.html` and normalize
Wrong page count in PDF	Check that SELECTORS covers all sections
Detached Frame error	Use the reusable `overlayPage` pattern — never use `newPage()/close()` in a loop
Website URL fails to fetch	Likely Fake IP proxy — use Puppeteer screenshot instead, or ask user for screenshots

Awesome Deck Pdf

Install

HTML → PDF Slide Workflow

‼️ STOP — Read Before Doing Anything

Confirmation 1 of 2: Design Style

Confirmation 2 of 2: Slide Content

Workflow Overview

⚠️ Two Mandatory Confirmation Gates (never skip)

Gate 1: Design Style

Gate 2: Slide Content

Step 1: Extract Design Spec → DESIGN.md

Step 3: Generate HTML

Step 4: Export PDF via Puppeteer

Environment matters

Troubleshooting

Related skills