agentmods.dev

pptx-offline

pptx-offline is a skill for Claude Code, Codex from okwinds/miscellany. It costs 65 tokens per session (6,317 once invoked), scanned B, a copy of pptx, MIT.

A set of instructions for reading, editing, rearranging, unpacking, and creating PowerPoint presentation files without relying on an online service.

In plain words
What is it for?
Use it to inspect or modify .pptx files, extract their text, edit their underlying XML, or create slides from HTML.
Why use it?
It explains how to work with presentation text as well as hidden details such as speaker notes, layouts, and animations.

Skill for Claude CodeCodex

not rated 50 3mo ago B scan 65 tokens copy · 91% MIT
View the source file okwinds/miscellany
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/okwinds/miscellany/pptx-offline
Any agent
npx skills add okwinds/miscellany --skill pptx-offline
Clone the repo
git clone --depth 1 https://github.com/okwinds/miscellany

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for pptx-offline

README.md
[![agentmods](https://agentmods.dev/badge/skills/okwinds/miscellany/pptx-offline.svg)](https://agentmods.dev/skills/okwinds/miscellany/pptx-offline)
Your own site
<a href="https://agentmods.dev/skills/okwinds/miscellany/pptx-offline"><img src="https://agentmods.dev/badge/skills/okwinds/miscellany/pptx-offline.svg" alt="Measured on agentmods" height="20"></a>
Per session 65 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,317 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. Scan, not verified.
Origin 91% copy Near-identical to another mod 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 $0.00065 $0.06317
Opus 5 $0.00032 $0.03159
Sonnet 5 $0.00013 $0.01263
Haiku 4.5 $0.00006 $0.00632

Measured 5d ago against content hash fcf9b3adb0f9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

pptx-offline scanned grade B with 1 finding 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 5d ago.

The scan reads SKILL.md. This mod also ships 14 executable files (ooxml/scripts/pack.py, ooxml/scripts/unpack.py, ooxml/scripts/validate.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

- Linux (Debian/Ubuntu): `sudo apt-get install libreoffice`
Origin

This is a copy

91% identical to pptx — 51 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

agent/skills/pptx-offline/SKILL.md · 508 lines

How it starts

The opening of the file, as written. The whole thing — 508 lines — stays where its author put it; the contents beside it link to each section on GitHub.

PPTX creation, editing, and analysis

Overview

A user may ask you to create, edit, or analyze the contents of a .pptx file. A .pptx file is essentially a ZIP archive containing XML files and other resources that you can read or edit. You have different tools and workflows available for different tasks.

Reading and analyzing content

Text extraction

If you just need to read the text contents of a presentation, you should convert the document to markdown:

# Convert document to markdown
python -m markitdown path-to-file.pptx

Raw XML access

You need raw XML access for: comments, speaker notes, slide layouts, animations, design elements, and complex formatting. For any of these features, you'll need to unpack a presentation and read its raw XML contents.

Unpacking a file

python ooxml/scripts/unpack.py <office_file> <output_dir>

Note: In the skill workspace, the script lives at ./ooxml/scripts/unpack.py.

Key file structures
  • ppt/presentation.xml - Main presentation metadata and slide references
  • ppt/slides/slide{N}.xml - Individual slide contents (slide1.xml, slide2.xml, etc.)
  • ppt/notesSlides/notesSlide{N}.xml - Speaker notes for each slide
  • ppt/comments/modernComment_*.xml - Comments for specific slides
  • ppt/slideLayouts/ - Layout templates for slides
  • ppt/slideMasters/ - Master slide templates
  • ppt/theme/ - Theme and styling information
  • ppt/media/ - Images and other media files
Typography and color extraction

When given an example design to emulate: Always analyze the presentation's typography and colors first using the methods below:

  1. Read theme file: Check ppt/theme/theme1.xml for colors (<a:clrScheme>) and fonts (<a:fontScheme>)
  2. Sample slide content: Examine ppt/slides/slide1.xml for actual font usage (<a:rPr>) and colors
  3. Search for patterns: Use grep to find color (<a:solidFill>, <a:srgbClr>) and font references across all XML files

Creating a new PowerPoint presentation without a template

Read the full file on GitHub · 508 lines

Files

What ships with it

58 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. 5d ago First seen · 508 lines · 65 tokens per session scan B fcf9b3adb0f9

Subscribe to this mod's changes

pptx-offline is a skill published in the GitHub repository okwinds/miscellany (50 stars, last pushed 3mo ago), licensed MIT. It adds 65 tokens to every session and 6,317 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). It is 91% identical to pptx, differing in 51 lines, and is treated as a copy.

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