Slides skill (PPTX create • edit • preview)

Use this skill when you need to create or modify a PowerPoint deck, or when you need reliable visual previews of a .pptx.

When to use

• •Generating a new deck programmatically (e.g., charts, diagrams, screenshots, product slides)
• •Updating an existing deck while preserving layout and typography
• •Previewing a deck or embedded assets (images/SVG/EMF/PDF) to verify rendering
• •Building a montage of slides for quick review / diffing

Core workflows

1) Render a PPTX to slide images (for visual QA)

Use render_slides.py to convert a .pptx into per-slide PNGs (via a PDF intermediate) so you can visually inspect results.

Common pattern

• •Render slides → open PNGs → verify layout, fonts, and chart fidelity.

2) Make a montage (one image of many slides)

Use create_montage.py to generate a montage image from a folder of slide PNGs. Great for quick reviews.

3) Rasterize embedded vector assets

Some PPTX assets may be SVG/EMF/WMF/PDF/EPS/etc. Use ensure_raster_image.py to convert to a PNG for consistent previews and embedding.

Files included

• •render_slides.py: PPTX → PDF → PNG rendering pipeline
• •create_montage.py: montage builder for slide PNGs
• •ensure_raster_image.py: rasterizes vector formats to PNG when needed
• •pptxgenjs_helpers/: helper JS modules used by deck-generation code

Output expectations

• •Slide previews are produced as PNGs in a target folder
• •Montages are a single image file suitable for quick iteration and sharing

Notes / pitfalls

• •Always validate final output by rendering and checking the PNGs—PPTX can look different depending on fonts and rendering engines.
• •Prefer raster images for predictable results when embedding complex vector assets.