Agent skill

PPTX File Validation

Validate PowerPoint files using python-pptx when standard file readers fail

Install PPTX File Validation

skills CLI

$ npx skills add HKUDS/OpenSpace --skill pptx-file-validation -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install HKUDS/OpenSpace pptx-file-validation --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/HKUDS/OpenSpace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/benchmarks/gdpval/skills/pptx-file-validation .claude/skills/pptx-file-validation && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "pptx-file-validation" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/pptx-file-validation into .claude/skills/pptx-file-validation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pptx-file-validation", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/pptx-file-validation

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add HKUDS/OpenSpace --skill pptx-file-validation -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install HKUDS/OpenSpace pptx-file-validation --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/HKUDS/OpenSpace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/benchmarks/gdpval/skills/pptx-file-validation .agents/skills/pptx-file-validation && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "pptx-file-validation" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/pptx-file-validation into .agents/skills/pptx-file-validation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pptx-file-validation", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add HKUDS/OpenSpace --skill pptx-file-validation -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install HKUDS/OpenSpace pptx-file-validation --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/HKUDS/OpenSpace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/benchmarks/gdpval/skills/pptx-file-validation .cursor/skills/pptx-file-validation && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "pptx-file-validation" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/pptx-file-validation into .cursor/skills/pptx-file-validation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pptx-file-validation", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/HKUDS/OpenSpace.git --path benchmarks/gdpval/skills/pptx-file-validation

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add HKUDS/OpenSpace --skill pptx-file-validation -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install HKUDS/OpenSpace pptx-file-validation --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/HKUDS/OpenSpace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/benchmarks/gdpval/skills/pptx-file-validation .gemini/skills/pptx-file-validation && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "pptx-file-validation" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/pptx-file-validation into .gemini/skills/pptx-file-validation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pptx-file-validation", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install HKUDS/OpenSpace pptx-file-validation

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add HKUDS/OpenSpace --skill pptx-file-validation -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/HKUDS/OpenSpace.git skills-src && mkdir -p .github/skills && cp -r skills-src/benchmarks/gdpval/skills/pptx-file-validation .github/skills/pptx-file-validation && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "pptx-file-validation" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/pptx-file-validation into .github/skills/pptx-file-validation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pptx-file-validation", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add HKUDS/OpenSpace --skill pptx-file-validation -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install HKUDS/OpenSpace pptx-file-validation --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/HKUDS/OpenSpace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/benchmarks/gdpval/skills/pptx-file-validation .opencode/skills/pptx-file-validation && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "pptx-file-validation" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/pptx-file-validation into .opencode/skills/pptx-file-validation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pptx-file-validation", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: pptx-file-validation
GitHub stars: 7.7k
Token cost: ~549 tokens
SKILL.md length: 193 words
Files: 2
Skills in repo: 199
Repo updated: Aug 12, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Validate PowerPoint files using python-pptx when standard file readers fail

Works in 4 steps: Detect read_file Failure → Use run_shell with python-pptx → Parse and Validate Output → …
Tasks that involve PowerPoint presentations
SKILL.md covers When to Use, Step-by-Step Instructions, Example Usage and Prerequisites, plus 1 more section
Calls python3 and pip

What it does

PPTX File Validation is an agent skill from HKUDS/OpenSpace. Validate PowerPoint files using python-pptx when standard file readers fail

Its SKILL.md is about 550 tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file.

It sits in Documents & Office, covering PowerPoint presentations. It works with Microsoft PowerPoint and python-pptx. The repository describes itself as: "OpenSpace: The Skill Management Layer for AI Agents" -- https://open-space.cloud/. The licence is MIT.

When your agent uses it

Tasks that involve PowerPoint presentations

Example prompts

“/pptx-file-validation”

Requirements

Python 3

Workflow steps

4 steps, taken from the step headings in SKILL.md.

Detect read_file Failure
Use run_shell with python-pptx
Parse and Validate Output
Report Validation Results

What it can do on your machine

Read from SKILL.md and the folder at commit 3827781. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- python3
- pip
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use pip, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

PPTX File Validation loads about 549 tokens when it runs. Until then it costs about 24 tokens; SKILL.md has 193 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~24
When it runs · the whole SKILL.md, loaded when a task matches: ~549

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from HKUDS/OpenSpace at commit 3827781, republished under its MIT licence (© HKUDS). 193 words, ~549 tokens.

Download SKILL.mdSave it as .claude/skills/pptx-file-validation/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: pptx-file-validation
description: Validate PowerPoint files using python-pptx when standard file readers fail

PPTX File Validation Workflow

This skill provides a reliable method to validate PowerPoint (.pptx) files when the built-in read_file function fails or returns insufficient information.

When to Use

read_file fails to read a .pptx file
You need to verify presentation contents (slide count, titles, structure)
Standard file readers return incomplete or unreadable data

Step-by-Step Instructions

Step 1: Detect read_file Failure

Attempt to read the PowerPoint file using read_file. If it fails, returns garbled content, or doesn't provide the structural information you need, proceed to Step 2.

Step 2: Use run_shell with python-pptx

Execute a Python script using run_shell with the python-pptx library to inspect the presentation:

bash

python3 -c "
from pptx import Presentation
prs = Presentation('path/to/file.pptx')
print(f'Total slides: {len(prs.slides)}')
for i, slide in enumerate(prs.slides, 1):
    print(f'Slide {i}: {slide.shapes.title.text if slide.shapes.title else \"[No Title]\"}')
"

Step 3: Parse and Validate Output

Analyze the output to verify:

Slide count matches expected number
Slide titles align with required topics
Structure is complete and properly formatted

Step 4: Report Validation Results

Document the validation findings, including:

Total number of slides
List of slide titles
Any missing or problematic content

Example Usage

python

# In your agent workflow
run_shell(command="python3 -c \"from pptx import Presentation; prs = Presentation('output.pptx'); print(f'Slides: {len(prs.slides)}'); [print(f'{i}: {s.shapes.title.text}') for i, s in enumerate(prs.slides, 1) if s.shapes.title]\"")

Prerequisites

Ensure python-pptx is available in the environment:

bash

pip install python-pptx

Benefits

Reliable: Works when built-in readers fail
Detailed: Provides slide-by-slide breakdown
Programmatic: Easy to parse and validate against requirements
Lightweight: No need for PowerPoint software installation

Files

SKILL.md and 1 other file in benchmarks/gdpval/skills/pptx-file-validation of HKUDS/OpenSpace.

SKILL.md
.skill_id

Open the folder on GitHubat commit 3827781

Compare with similar skills

PPTX File Validation next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

PPTX File Validation compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
PPTX File Validation this skillHKUDS/OpenSpace	7.7k	—	~549	Automated safety check: Pass	MIT	1 mo ago
Slidesfcakyon/claude-codex-settings	1.2k	1 repos	~1.1k	Automated safety check: Pass	MIT	today
Thesis Defense PPTX Builderzouchenzhen/thesis-defense-pptx-skill	266	—	~2.4k	Automated safety check: Pass	Apache-2.0	4 mo ago
Powerpoint SlidesNoi1r/powerpoint-skill	123	—	~12k	Automated safety check: Notes	MIT	6 mo ago
PPTX HTML Fidelity Auditsanqiufong/slides-from-anything	132	1 repos	~3.5k	Automated safety check: Pass	Apache-2.0	yesterday
PPTX Chart Forensicsaiden0z/pptx-renderer	127	—	~970	Automated safety check: Pass	Apache-2.0	15 days ago

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1.2k GitHub starsUsed in 1 repo~1.1k tokens
Documents & OfficeAuto-check passed
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PPTX HTML Fidelity Audit
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PPTX Chart Forensics
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A skill your agent uses when diagnosing or fixing PPTX renderer chart mismatches, chart oracle failures, ECharts option drift, OOXML chart XML parsing gaps, axis or legend discrepancies, plotArea…
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PPTX Oracle Eval
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Questions about PPTX File Validation

What does PPTX File Validation do?

Validate PowerPoint files using python-pptx when standard file readers fail. PPTX File Validation is an agent skill from HKUDS/OpenSpace.

When should I use PPTX File Validation?

PPTX File Validation fits situations like: tasks that involve PowerPoint presentations.

How do I install PPTX File Validation in Claude Code?

Run `npx skills add HKUDS/OpenSpace --skill pptx-file-validation -a claude-code`. Or copy the skill folder (benchmarks/gdpval/skills/pptx-file-validation in HKUDS/OpenSpace) into .claude/skills/pptx-file-validation in your project. Claude Code loads it when a task matches its description.

How do I install PPTX File Validation in Codex?

Run `npx skills add HKUDS/OpenSpace --skill pptx-file-validation -a codex`. Or copy the skill folder (benchmarks/gdpval/skills/pptx-file-validation in HKUDS/OpenSpace) into .agents/skills/pptx-file-validation in your project. Codex loads it when a task matches its description.

Can I use PPTX File Validation in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add HKUDS/OpenSpace --skill pptx-file-validation -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/pptx-file-validation, .gemini/skills/pptx-file-validation, .github/skills/pptx-file-validation and .opencode/skills/pptx-file-validation in your project.

What does PPTX File Validation need to run?

Going by SKILL.md and its folder, PPTX File Validation needs the command-line tools its instructions call (python3 and pip). Our summary lists: Python 3.

Does PPTX File Validation access the network?

SKILL.md contains no URLs. Its commands use pip, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is PPTX File Validation safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does PPTX File Validation use?

PPTX File Validation is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does PPTX File Validation use?

About 549 tokens (SKILL.md is roughly 2.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to PPTX File Validation?

Skills that share tags, products or a category with PPTX File Validation: Slides (fcakyon/claude-codex-settings, 1.2k stars), Thesis Defense PPTX Builder (zouchenzhen/thesis-defense-pptx-skill, 266 stars), Powerpoint Slides (Noi1r/powerpoint-skill, 123 stars) and PPTX HTML Fidelity Audit (sanqiufong/slides-from-anything, 132 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains PPTX File Validation?

HKUDS (a GitHub organization) maintains it in HKUDS/OpenSpace, which has 7,749 GitHub stars. The repository holds 199 skills in this directory. The repository was last updated on August 12, 2026.

Source: HKUDS/OpenSpace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install PPTX File Validation

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

PPTX File Validation Workflow

When to Use

Step-by-Step Instructions

Step 1: Detect read_file Failure

Step 2: Use run_shell with python-pptx

Step 3: Parse and Validate Output

Step 4: Report Validation Results

Example Usage

Prerequisites

Benefits

Files

Compare with similar skills

Similar skills

More from HKUDS/OpenSpace

Related

Questions about PPTX File Validation