pptx

A guide and toolkit for creating, reading, and editing PowerPoint presentation files in the .pptx format. It supports slide decks such as presentations, pitch decks, and training materials.

In plain words
What is it for?
Use it to create a presentation, extract text from an existing PowerPoint file, replace content, update charts, or combine and split slides.
Why use it?
It helps keep slide layouts, templates, text hierarchy, images, and charts organized when generating or changing a deck. It also helps ensure the resulting file opens in common presentation software.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/gtmify/aigtm/pptx
Any agent
npx skills add GTMify/aigtm --skill pptx
Clone the repo
git clone --depth 1 https://github.com/GTMify/aigtm

Made for: Claude Code, Codex.

Per session 103 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,467 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00103 $0.01467
Opus 5 $0.00051 $0.00733
Sonnet 5 $0.00021 $0.00293
Haiku 4.5 $0.00010 $0.00147

Measured 2d ago against content hash 25f6c611bdf9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

pptx scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/pptx/SKILL.md · 143 lines

How it starts

The opening of the file, as written. The whole thing — 143 lines — stays where its author put it; the contents beside it link to each section on GitHub.

PowerPoint Skill

Your Role

You are a deck operator who builds and edits PowerPoint files using Python's python-pptx library. You respect slide layouts, master templates, and design hierarchy — you do not produce 50 text-heavy slides with no structure. Your output is a .pptx file that opens cleanly in PowerPoint, Keynote, or Google Slides.

When to use this skill

Trigger when:

  • The user references a .pptx file by name or path
  • The user wants to create a pitch deck, sales deck, training deck, or QBR deck
  • The user wants to extract text from a deck (e.g., for summarization or repurposing)
  • The user wants to modify an existing deck (find-and-replace, swap slides, update charts)
  • The user mentions "deck," "slides," "presentation," "pitch deck," "PowerPoint"

Do NOT trigger when:

  • The deliverable is a PDF, Word doc, or HTML page
  • The user wants Keynote-specific features (those don't round-trip via python-pptx)

Required libraries

  • python-pptx — read/write .pptx, slides, shapes, text, images, charts, notes
  • Pillow — image processing
  • matplotlib (optional) — generate chart images for slides

Install: pip install python-pptx Pillow matplotlib.

Process

Step 1: Plan the Deck

Before writing any code, decide:

  • Slide count: A pitch deck is 10-15. A sales deck is 8-12. A board deck is 20-30. Don't ship 50.
  • Slide types: Title, section divider, content (bullets), data (chart/table), quote, image-heavy, closing
  • Template: Start from an existing .pptx template if available — never start from a blank Presentation() unless the user has no brand

Step 2: Load Template or Start Fresh

from pptx import Presentation
from pptx.util import Inches, Pt
from pptx.dml.color import RGBColor

# Load template (preferred)
prs = Presentation("template.pptx")

# Or start fresh
prs = Presentation()  # 4:3 default
# For 16:9:
# from pptx.util import Emu
# prs.slide_width = Inches(13.333)
# prs.slide_height = Inches(7.5)

Read the full file on GitHub · 143 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 143 lines · 103 tokens per session scan A 25f6c611bdf9

Subscribe to this mod's changes

pptx is a skill published in the GitHub repository GTMify/aigtm (24 stars, last pushed 24d ago), licensed MIT. It adds 103 tokens to every session and 1,467 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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