A toolkit for creating, editing, and examining PowerPoint presentation files (.pptx). It can work with slide text, layouts, comments, speaker notes, animations, and formatting.

Use it to create presentations, change slide content and layouts, add comments or speaker notes, and analyze existing slides.

It removes the need to handle the presentation's underlying package of XML files and resources by hand. It also provides different ways to read simple text or inspect detailed slide structure.

pptx — Skill for Claude Code and Codex by netease-youdao

About the project

LobsterAI is an open-source desktop AI agent that operates files, commands, browsers, documents, spreadsheets, slides, messaging channels, and scheduled jobs in a user's working environment. It supports office work, research, and custom multi-agent workflows, while catalogue add-ons extend the agent with additional skills and workflows.

netease-youdao/LobsterAI · 6,007 stars · on GitHub · lobsterai.youdao.com

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.

Any agent

npx skills add netease-youdao/LobsterAI --skill pptx

Clone the repo

git clone --depth 1 https://github.com/netease-youdao/LobsterAI

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/netease-youdao/lobsterai/pptx/github.svg)](https://agentmods.dev/skills/netease-youdao/lobsterai/pptx)

Your own site

<a href="https://agentmods.dev/skills/netease-youdao/lobsterai/pptx"><img src="https://agentmods.dev/badge/skills/netease-youdao/lobsterai/pptx/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/netease-youdao/lobsterai/pptx"><img src="https://agentmods.dev/badge/skills/netease-youdao/lobsterai/pptx.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 62 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 6,321 The whole file, excluding the scripts and references it only reads on demand.

Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin 92% 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.

Model	Per session	Once invoked
Fable 5.1	$0.00062	$0.06321
Opus 5	$0.00031	$0.03161
Sonnet 5	$0.00012	$0.01264
Haiku 4.5	$0.00006	$0.00632

Measured 11d ago against content hash edb26b913054, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade B, and why

pptx 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 11d ago.

The scan reads SKILL.md. This mod also ships 13 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.

- **LibreOffice**: `sudo apt-get install libreoffice` (for PDF conversion)

Origin

This is a copy

92% identical to pptx — 9 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.

SKILLs/pptx/SKILL.md · 486 lines

How it starts

The opening of the file, as written. The whole thing — 486 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: Resolve script paths from this skill directory. Prefer $SKILLS_ROOT/pptx/ooxml/scripts/unpack.py when $SKILLS_ROOT is available; otherwise resolve ooxml/scripts/unpack.py relative to this SKILL.md file's directory. Do not assume a workspace-relative skills/pptx/... path.

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:

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

Read the full file on GitHub · 486 lines

Files

What ships with it

56 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.

11d ago First seen · 486 lines · 62 tokens per session scan B edb26b913054

Subscribe to this mod's changes

pptx is a skill published in the GitHub repository netease-youdao/LobsterAI (6,007 stars, last pushed today), licensed MIT. It adds 62 tokens to every session and 6,321 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 92% identical to pptx, differing in 9 lines, and is treated as a copy.

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