Add publish-to-pages agent skill

skills/publish-to-pages/SKILL.md

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+---
+name: publish-to-pages
+description: 'Publish presentations and web content to GitHub Pages. Converts PPTX, PDF, HTML, or Google Slides to a live GitHub Pages URL. Handles repo creation, file conversion, Pages enablement, and returns the live URL. Use when the user wants to publish, deploy, or share a presentation or HTML file via GitHub Pages.'
+---
+
+# publish-to-pages
+
+Publish any presentation or web content to GitHub Pages in one shot.
+
+## 1. Prerequisites Check
+
+Run these silently. Only surface errors:
+
+```bash
+command -v gh >/dev/null || echo "MISSING: gh CLI — install from https://cli.github.com"
+gh auth status &>/dev/null || echo "MISSING: gh not authenticated — run 'gh auth login'"
+command -v python3 >/dev/null || echo "MISSING: python3 (needed for PPTX conversion)"
+```
+
+`poppler-utils` is optional (PDF conversion via `pdftoppm`). Don't block on it.
+
+## 2. Input Detection
+
+Determine input type from what the user provides:
+
+| Input | Detection |
+|-------|-----------|
+| HTML file | Extension `.html` or `.htm` |
+| PPTX file | Extension `.pptx` |
+| PDF file | Extension `.pdf` |
+| Google Slides URL | URL contains `docs.google.com/presentation` |
+
+Ask the user for a **repo name** if not provided. Default: filename without extension.
+
+## 3. Conversion
+
+### HTML
+No conversion needed. Use the file directly as `index.html`.
+
+### PPTX
+Run the conversion script:
+```bash
+python3 SKILL_DIR/scripts/convert-pptx.py INPUT_FILE /tmp/output.html
+```
+If `python-pptx` is missing, tell the user: `pip install python-pptx`
+
+### PDF
+Convert with the included script (requires `poppler-utils` for `pdftoppm`):
+```bash
+python3 SKILL_DIR/scripts/convert-pdf.py INPUT_FILE /tmp/output.html
+```
+Each page is rendered as a PNG and base64-embedded into a self-contained HTML with slide navigation.
+If `pdftoppm` is missing, tell the user: `apt install poppler-utils` (or `brew install poppler` on macOS).
+
+### Google Slides
+1. Extract the presentation ID from the URL (the long string between `/d/` and `/`)
+2. Download as PPTX:
+```bash
+curl -L "https://docs.google.com/presentation/d/PRESENTATION_ID/export/pptx" -o /tmp/slides.pptx
+```
+3. Then convert the PPTX using the convert script above.
+
+## 4. Publishing
+
+### Visibility
+Repos are created **public** by default. If the user specifies `private` (or wants a private repo), use `--private` — but note that GitHub Pages on private repos requires a Pro, Team, or Enterprise plan.
+
+### Publish
+```bash
+bash SKILL_DIR/scripts/publish.sh /path/to/index.html REPO_NAME public "Description"
+```
+
+Pass `private` instead of `public` if the user requests it.
+
+The script creates the repo, pushes `index.html`, and enables GitHub Pages.
+
+## 5. Output
+
+Tell the user:
+- **Repository:** `https://github.com/USERNAME/REPO_NAME`
+- **Live URL:** `https://USERNAME.github.io/REPO_NAME/`
+- **Note:** Pages takes 1-2 minutes to go live.
+
+## Error Handling
+
+- **Repo already exists:** Suggest appending a number (`my-slides-2`) or a date (`my-slides-2026`).
+- **Pages enablement fails:** Still return the repo URL. User can enable Pages manually in repo Settings.
+- **PPTX conversion fails:** Tell user to run `pip install python-pptx`.
+- **PDF conversion fails:** Suggest installing `poppler-utils` (`apt install poppler-utils` or `brew install poppler`).
+- **Google Slides download fails:** The presentation may not be publicly accessible. Ask user to make it viewable or download the PPTX manually.

skills/publish-to-pages/scripts/convert-pdf.py

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+#!/usr/bin/env python3
+"""Convert a PDF to a self-contained HTML presentation.
+
+Each page is rendered as a PNG image (via pdftoppm) and base64-embedded
+into a single HTML file with slide navigation (arrows, swipe, click).
+
+Requirements: poppler-utils (pdftoppm)
+Usage: python3 convert-pdf.py input.pdf [output.html]
+"""
+
+import base64
+import glob
+import os
+import subprocess
+import sys
+import tempfile
+from pathlib import Path
+
+
+def convert(pdf_path: str, output_path: str | None = None, dpi: int = 150):
+    pdf_path = str(Path(pdf_path).resolve())
+    if not Path(pdf_path).exists():
+        print(f"Error: {pdf_path} not found")
+        sys.exit(1)
+
+    # Check for pdftoppm
+    if subprocess.run(["which", "pdftoppm"], capture_output=True).returncode != 0:
+        print("Error: pdftoppm not found. Install poppler-utils:")
+        print("  apt install poppler-utils  # Debian/Ubuntu")
+        print("  brew install poppler       # macOS")
+        sys.exit(1)
+
+    with tempfile.TemporaryDirectory() as tmpdir:
+        prefix = os.path.join(tmpdir, "page")
+        result = subprocess.run(
+            ["pdftoppm", "-png", "-r", str(dpi), pdf_path, prefix],
+            capture_output=True, text=True
+        )
+        if result.returncode != 0:
+            print(f"Error converting PDF: {result.stderr}")
+            sys.exit(1)
+
+        pages = sorted(glob.glob(f"{prefix}-*.png"))
+        if not pages:
+            print("Error: No pages rendered from PDF")
+            sys.exit(1)
+
+        slides_html = []
+        for i, page_path in enumerate(pages, 1):
+            with open(page_path, "rb") as f:
+                b64 = base64.b64encode(f.read()).decode()
+            slides_html.append(
+                f'<section class="slide">'
+                f'<div class="slide-inner">'
+                f'<img src="data:image/png;base64,{b64}" alt="Page {i}">'
+                f'</div></section>'
+            )
+
+    # Try to extract title from filename
+    title = Path(pdf_path).stem.replace("-", " ").replace("_", " ")
+
+    html = f'''<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="UTF-8">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<title>{title}</title>
+<style>
+* {{ margin: 0; padding: 0; box-sizing: border-box; }}
+html, body {{ height: 100%; overflow: hidden; background: #000; }}
+.slide {{ width: 100vw; height: 100vh; display: none; align-items: center; justify-content: center; }}
+.slide.active {{ display: flex; }}
+.slide-inner {{ display: flex; align-items: center; justify-content: center; width: 100%; height: 100%; }}
+.slide-inner img {{ max-width: 100%; max-height: 100%; object-fit: contain; }}
+.progress {{ position: fixed; bottom: 0; left: 0; height: 4px; background: #0366d6; transition: width 0.3s; z-index: 100; }}
+.counter {{ position: fixed; bottom: 12px; right: 20px; font-size: 14px; color: rgba(255,255,255,0.4); z-index: 100; }}
+</style>
+</head>
+<body>
+{chr(10).join(slides_html)}
+<div class="progress" id="progress"></div>
+<div class="counter" id="counter"></div>
+<script>
+const slides = document.querySelectorAll('.slide');
+let current = 0;
+function show(n) {{
+    slides.forEach(s => s.classList.remove('active'));
+    current = Math.max(0, Math.min(n, slides.length - 1));
+    slides[current].classList.add('active');
+    document.getElementById('progress').style.width = ((current + 1) / slides.length * 100) + '%';
+    document.getElementById('counter').textContent = (current + 1) + ' / ' + slides.length;
+}}
+document.addEventListener('keydown', e => {{
+    if (e.key === 'ArrowRight' || e.key === ' ') {{ e.preventDefault(); show(current + 1); }}
+    if (e.key === 'ArrowLeft') {{ e.preventDefault(); show(current - 1); }}
+}});
+let touchStartX = 0;
+document.addEventListener('touchstart', e => {{ touchStartX = e.changedTouches[0].screenX; }});
+document.addEventListener('touchend', e => {{
+    const diff = e.changedTouches[0].screenX - touchStartX;
+    if (Math.abs(diff) > 50) {{ diff > 0 ? show(current - 1) : show(current + 1); }}
+}});
+document.addEventListener('click', e => {{
+    if (e.clientX > window.innerWidth / 2) show(current + 1);
+    else show(current - 1);
+}});
+show(0);
+</script>
+</body></html>'''
+
+    output = output_path or str(Path(pdf_path).with_suffix('.html'))
+    Path(output).write_text(html, encoding='utf-8')
+    print(f"Converted to: {output}")
+    print(f"Pages: {len(slides_html)}")
+
+
+if __name__ == "__main__":
+    if len(sys.argv) < 2:
+        print("Usage: convert-pdf.py <file.pdf> [output.html]")
+        sys.exit(1)
+    convert(sys.argv[1], sys.argv[2] if len(sys.argv) > 2 else None)