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Deck Builder PPTX

Build a finished PowerPoint (.pptx) in ONE command from a short JSON outline: title slide, section and bullet slides, two-column, quote, big-number and closing slides, with a clean theme and speaker notes, optional PDF. Use for any request for a deck, presentation, slides or pitch when the content is text and bullets. Faster and far cheaper than hand-written pptxgenjs code: write outline.json, run build_deck.py, done. Triggers: PowerPoint, pptx, deck, slides, presentation, præsentation, pitch deck.

11 uses this weeksource Percernolicence MIT

Quality gate: PASS · makes it possible · measured 2026-10-23
Delivered a valid file in 3 of 3 requests; the bare model cannot produce this file type.
3/3 requests produced a file that opens

Security scan: clean · 2026-10-24 · 2 files · ran in sandbox
no network calls, shell tricks, credential access or instruction tampering found in its files.

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When it is the right choice

The full recipe the assistant reads

Deck builder (one command)

Write the outline as JSON, run one script, hand back the file. Do not write pptxgenjs or python-pptx code yourself; do not inspect the result slide by slide. The script validates the file.

1. Write the outline

/work/outline.json:

{
  "title": "On-premise AI for Danish SMEs",
  "subtitle": "Why keep the model in the building",
  "author": "Percerno",
  "theme": "navy",
  "language": "en",
  "slides": [
    {"type": "section", "title": "The problem"},
    {"type": "bullets", "title": "Cloud AI leaves three gaps", "bullets": ["Data leaves the EU", "Per-token cost scales with success", "No control over model changes"], "notes": "Open with the GDPR point."},
    {"type": "two-column", "title": "Cloud vs on-premise", "left_title": "Cloud", "left": ["Fast start", "No hardware"], "right_title": "On-premise", "right": ["Data stays", "Fixed cost"]},
    {"type": "big-number", "title": "Payback", "number": "14 months", "caption": "at 200 daily users"},
    {"type": "quote", "quote": "We stopped asking legal for permission.", "attribution": "CIO, manufacturing company"},
    {"type": "bullets", "title": "Next steps", "bullets": ["Pilot on one team", "Measure for 90 days", "Decide on rollout"]},
    {"type": "closing", "title": "Thank you", "subtitle": "questions@percerno.ai"}
  ]
}

Slide types: section, bullets (3–6 bullets, each under 14 words), two-column, big-number, quote, closing. Every slide may carry "notes". Themes: navy, teal, charcoal, warm. language only affects the date format on the title slide. Aim for 6–12 slides; one idea per slide; put the takeaway in the title.

2. Build

python3 /skills/deck-builder/scripts/build_deck.py /work/outline.json /work/out/deck.pptx --pdf

Prints OK <slides> slides -> /work/out/deck.pptx (and deck.pdf) or a clear error. --pdf also renders a PDF with LibreOffice (adds ~10 s). That is the whole job: give the person the download link(s).

Editing an existing deck or reading one

Not this skill: use pptx-generator (template editing, XML) or python -m markitdown file.pptx (text extraction).

Files in this skill (2)

SKILL.md
scripts/build_deck.py

Where it comes from

Written by Percerno, MIT licence.