A toolset for creating, reading, and editing PowerPoint presentations and templates in .pptx or .potx format. These files contain slides with text, images, layouts, and other presentation content.

Creating slide decks, reading presentations, editing existing decks or templates, and extracting slide text or thumbnails.

It provides workflows for handling slide files, including extracting their text and editing their underlying structure. It helps when the input or output must remain a PowerPoint file.

pptx — Skill for Claude Code and Codex by asgeirtj

About the project

System Prompts Leaks is a collection of captured system instructions used to guide AI chatbots and coding agents before they receive user messages. It serves researchers and developers studying how different AI assistants are directed.

asgeirtj/system_prompts_leaks · 69,707 stars · on GitHub

Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo

git clone --depth 1 https://github.com/asgeirtj/system_prompts_leaks

agentmods

npx agentmods add skills/asgeirtj/system_prompts_leaks/pptx

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/asgeirtj/system_prompts_leaks/pptx/github.svg)](https://agentmods.dev/skills/asgeirtj/system_prompts_leaks/pptx)

Your own site

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

Per session 217 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 7,236 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00217	$0.07236
Opus 5.5	$0.00087	$0.02894
Sonnet 5.5	$0.00043	$0.01447
Haiku 4.5	$0.00022	$0.00724

Measured 7d ago against content hash d8bf85f2ef18, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 7d ago.

The scan reads SKILL.md. This mod also ships 16 executable files (scripts/__init__.py, scripts/add_slide.py, scripts/apply_theme.js, …), 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.

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.

Origin

Copies of this mod

8 near-identical copies found in the catalogue:

pptx — 100% identical, 39 lines differ
pptx — 91% identical, 42 lines differ
pptx — 91% identical, 42 lines differ
pptx — 91% identical, 42 lines differ
pptx — 91% identical, 42 lines differ
pptx — 91% identical, 42 lines differ
pptx — 91% identical, 42 lines differ
pptx — 91% identical, 42 lines differ

Anthropic/claude-code/skills/pptx/SKILL.md · 271 lines

How it starts

The opening of the file, as written. The whole thing — 271 lines — stays where its author put it; the contents beside it link to each section on GitHub.

PPTX creation, editing, and analysis

If this session offers a dedicated slide-deck artifact type or a separate slides skill, and the user has neither asked for a PowerPoint/.pptx file nor supplied a .pptx/.potx file to edit, fill in, or convert, build the deck with that type or skill instead. A .pptx/.potx file given only as source material or as an example for a new deck ("make another deck like this one") does not count as supplied: read it with this skill, then build the new deck with that type or skill. This skill remains the right tool for producing .pptx files and for reading, editing, templating, or converting existing .pptx/.potx files.

A .pptx is a ZIP archive of XML files. Choose your approach by task:

Task	Approach
Create a new deck	Write a `pptxgenjs` script — see gotchas below — and build it as a structured deck unless the user asks for a quick throwaway
Edit an existing deck, or build from a template	unzip → edit `ppt/slides/slideN.xml` → zip
Read content	`markitdown deck.pptx` (one block per slide under `<!-- Slide number: N -->` markers); visual grid: `python scripts/thumbnail.py deck.pptx`

Scripts

Paths are relative to this skill's directory. Everything else is plain Python, node, or shell.

Script	What it does
`scripts/thumbnail.py deck.pptx [prefix]`	Labeled grid of every slide, for picking template layouts. `.pptx` only. Pass `prefix` — it defaults to `thumbnails`, which overwrites the grids of any other deck done in the same directory
`scripts/add_slide.py unpacked/ slide2.xml [--after slideN.xml]`	Duplicate a slide (or a `slideLayoutN.xml`) with all the package bookkeeping. Also takes a `.pptx` directly with `-o out.pptx`
`scripts/clean.py unpacked/`	Delete slides, media, and rels no longer referenced. Run after `<p:sldIdLst>` is final
`scripts/apply_theme.js`	Node module: `const { applyTheme } = require("<this skill's directory>/scripts/apply_theme.js")`. `await applyTheme("deck.pptx", THEME)` after `pres.writeFile()` writes `THEME`'s colors and name (escaped for XML) into the deck's theme, for structured decks. Also a CLI: `node scripts/apply_theme.js deck.pptx theme.json`
`scripts/office/validate.py deck.pptx [--original src.pptx]`	Schema, relationship, content-type, chart and slide checks; each failure names its fix. Pass `--original` for any template-derived deck — it baselines the schema checks against the template, so the template's own XSD errors don't read as yours
`scripts/office/soffice.py --headless --convert-to pdf deck.pptx`	LibreOffice wrapper — bare `soffice` hangs in this sandbox

Read the full file on GitHub · 271 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.

7d ago Changed · +29 lines d8bf85f2ef18
23d ago First seen · 242 lines · 217 tokens per session scan A 6c20f2928ca8

Subscribe to this mod's changes

pptx is a skill published in the GitHub repository asgeirtj/system_prompts_leaks (69,707 stars, last pushed 2d ago), licensed CC0-1.0. It adds 217 tokens to every session and 7,236 once invoked, about $0.0009 per session on Opus 5.5. 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 2026-09-23.

Claude Code Documents ai anthropic chatbot chatgpt claude

pptx

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

Copies of this mod

How it starts

PPTX creation, editing, and analysis

Scripts

What ships with it

What this file has done since we first saw it

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