pptx

name

pptx

description

Use this skill to author or edit Microsoft PowerPoint .pptx files. Covers generating decks from scratch (HTML+PptxGenJS, Marp markdown-to-slides, or python-pptx), editing existing decks in place, and validating output. For READING existing .pptx files, use the harness `read` tool — do not invoke this skill. Triggers: 'build a deck', 'create slides', 'edit slide N', 'add a chart slide'. Does NOT apply to .pdf, .docx, .xlsx, or .ppt (legacy).

PPTX authoring and editing

Reading is not in scope. To read an existing .pptx, use the harness read tool (markitdown extracts slide text). This skill is for writing and editing.

Quick reference

Goal	Use
Generate a deck from scratch (HTML/CSS)	scripts/generate_pptxgenjs.js
Generate a deck from markdown	scripts/generate_marp.sh
Build slides programmatically	python-pptx directly
Edit a shape on an existing slide	scripts/edit_shape.py (JSON patch)
Add or remove a slide	unpack → edit → pack
QA a deck deterministically	scripts/deterministic_qa.py
Validate before delivery	scripts/validate.py

Generation modalities

HTML/CSS via PptxGenJS (preferred for visual fidelity):

node scripts/generate_pptxgenjs.js deck.json out.pptx

deck.json describes slides as a JSON tree; the script invokes PptxGenJS (and html2pptx for HTML inputs) to produce a fully-editable .pptx. Best for branded decks with gradients, custom fonts, complex shapes.