Agent skill

PDF Verification Check 112b09

Verify generated PDF files using PyPDF2 to check page counts and integrity

Install PDF Verification Check 112b09

skills CLI

$ npx skills add HKUDS/OpenSpace --skill pdf-verification-check-112b09 -a claude-code

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

GitHub CLI

$ gh skill install HKUDS/OpenSpace pdf-verification-check-112b09 --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/pdf-verification-check-112b09 .claude/skills/pdf-verification-check-112b09 && 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 "pdf-verification-check-112b09" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/pdf-verification-check-112b09 into .claude/skills/pdf-verification-check-112b09/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pdf-verification-check-112b09", 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/pdf-verification-check-112b09

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 pdf-verification-check-112b09 -a codex

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

GitHub CLI

$ gh skill install HKUDS/OpenSpace pdf-verification-check-112b09 --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/pdf-verification-check-112b09 .agents/skills/pdf-verification-check-112b09 && 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 "pdf-verification-check-112b09" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/pdf-verification-check-112b09 into .agents/skills/pdf-verification-check-112b09/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pdf-verification-check-112b09", 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 pdf-verification-check-112b09 -a cursor

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

GitHub CLI

$ gh skill install HKUDS/OpenSpace pdf-verification-check-112b09 --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/pdf-verification-check-112b09 .cursor/skills/pdf-verification-check-112b09 && 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 "pdf-verification-check-112b09" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/pdf-verification-check-112b09 into .cursor/skills/pdf-verification-check-112b09/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pdf-verification-check-112b09", 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/pdf-verification-check-112b09

--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 pdf-verification-check-112b09 -a gemini-cli

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

GitHub CLI

$ gh skill install HKUDS/OpenSpace pdf-verification-check-112b09 --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/pdf-verification-check-112b09 .gemini/skills/pdf-verification-check-112b09 && 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 "pdf-verification-check-112b09" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/pdf-verification-check-112b09 into .gemini/skills/pdf-verification-check-112b09/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pdf-verification-check-112b09", 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 pdf-verification-check-112b09

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 pdf-verification-check-112b09 -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/pdf-verification-check-112b09 .github/skills/pdf-verification-check-112b09 && 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 "pdf-verification-check-112b09" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/pdf-verification-check-112b09 into .github/skills/pdf-verification-check-112b09/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pdf-verification-check-112b09", 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 pdf-verification-check-112b09 -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 pdf-verification-check-112b09 --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/pdf-verification-check-112b09 .opencode/skills/pdf-verification-check-112b09 && 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 "pdf-verification-check-112b09" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/pdf-verification-check-112b09 into .opencode/skills/pdf-verification-check-112b09/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pdf-verification-check-112b09", 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: pdf-verification-check-112b09
GitHub stars: 7.8k
Token cost: ~875 tokens
SKILL.md length: 162 words
Files: 2
Skills in repo: 199
Repo updated: Aug 12, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Verify generated PDF files using PyPDF2 to check page counts and integrity

Works in 4 steps: Install PyPDF2 (if not available) → Verify PDF Page Count and Integrity → Use run_shell for Verification → …
Tasks that involve PDF
SKILL.md covers When to Use, Verification Steps, Common Issues Caught and Example Workflow
Calls pip and python

What it does

PDF Verification Check 112b09 is an agent skill from HKUDS/OpenSpace. Verify generated PDF files using PyPDF2 to check page counts and integrity

Its SKILL.md is about 880 tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file.

It sits in Documents & Office, covering PDF. It works with pypdf. 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 PDF

Example prompts

“/pdf-verification-check-112b09”

Requirements

Python 3

Workflow steps

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

Install PyPDF2 (if not available)
Verify PDF Page Count and Integrity
Use run_shell for Verification
Verify Before Completion

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:
- pip
- python
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

PDF Verification Check 112b09 loads about 875 tokens when it runs. Until then it costs about 26 tokens; SKILL.md has 162 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~26
When it runs · the whole SKILL.md, loaded when a task matches: ~875

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). 162 words, ~875 tokens.

Download SKILL.mdSave it as .claude/skills/pdf-verification-check-112b09/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: pdf-verification-check-112b09
description: Verify generated PDF files using PyPDF2 to check page counts and integrity

PDF Verification Check

After generating PDF files, always programmatically verify their structure and integrity before declaring task completion. This catches formatting errors, incorrect page counts, and corrupted files early.

When to Use

Use this skill whenever your task involves:

Generating PDF documents
Creating PDFs with specific page count requirements
Producing multi-part PDF outputs (e.g., listings + maps)

Verification Steps

1. Install PyPDF2 (if not available)

bash

pip install PyPDF2

2. Verify PDF Page Count and Integrity

Create a verification script or run inline Python:

python

from PyPDF2 import PdfReader
import os

def verify_pdf(pdf_path, expected_pages=None):
    """Verify PDF file exists, is readable, and has expected page count."""
    try:
        # Check file exists
        if not os.path.exists(pdf_path):
            return False, f"File not found: {pdf_path}"
        
        # Check file size (non-empty)
        file_size = os.path.getsize(pdf_path)
        if file_size == 0:
            return False, f"Empty file: {pdf_path}"
        
        # Open and verify PDF structure
        reader = PdfReader(pdf_path)
        actual_pages = len(reader.pages)
        
        # Check page count if expected
        if expected_pages is not None and actual_pages != expected_pages:
            return False, f"Expected {expected_pages} pages, got {actual_pages}"
        
        return True, f"Valid PDF with {actual_pages} page(s)"
        
    except Exception as e:
        return False, f"PDF verification failed: {str(e)}"

# Example usage
pdf_files = [
    ("listings.pdf", 2),
    ("map.pdf", 1),
]

all_valid = True
for pdf_path, expected in pdf_files:
    valid, message = verify_pdf(pdf_path, expected)
    print(f"{pdf_path}: {'✓' if valid else '✗'} {message}")
    if not valid:
        all_valid = False

if not all_valid:
    raise Exception("PDF verification failed - review and regenerate")

3. Use run_shell for Verification

Execute the verification using run_shell:

bash

python -c "
from PyPDF2 import PdfReader
import sys

pdf_path = 'output.pdf'
expected = 2

try:
    reader = PdfReader(pdf_path)
    actual = len(reader.pages)
    if actual != expected:
        print(f'ERROR: Expected {expected} pages, got {actual}')
        sys.exit(1)
    print(f'OK: {pdf_path} has {actual} page(s)')
except Exception as e:
    print(f'ERROR: {e}')
    sys.exit(1)
"

4. Verify Before Completion

Critical: Only mark your task as complete after ALL PDF verification checks pass. If verification fails:

Examine the error message
Regenerate the PDF with corrected formatting
Re-run verification
Repeat until all checks pass

Common Issues Caught

Wrong page counts (e.g., content spilling to extra pages)
Empty or corrupted PDF files
PDFs that fail to open properly
Missing expected sections due to formatting errors

Example Workflow

python

# 1. Generate PDF
generate_pdf("listings.pdf", content)

# 2. Verify before completion
valid, msg = verify_pdf("listings.pdf", expected_pages=2)
if not valid:
    # Fix and regenerate
    regenerate_pdf("listings.pdf", corrected_content)
    valid, msg = verify_pdf("listings.pdf", expected_pages=2)

# 3. Only complete if verification passes
assert valid, f"Cannot complete: {msg}"

Files

SKILL.md and 1 other file in benchmarks/gdpval/skills/pdf-verification-check-112b09 of HKUDS/OpenSpace.

SKILL.md
.skill_id

Open the folder on GitHubat commit 3827781

Compare with similar skills

PDF Verification Check 112b09 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.

PDF Verification Check 112b09 compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
PDF Verification Check 112b09 this skillHKUDS/OpenSpace	7.8k	—	~875	Automated safety check: Pass	MIT	1 mo ago
PDFzai-org/ZCode	7.7k	—	~18k	Automated safety check: Notes	Proprietary	yesterday
PDFnuoyimanaituling/manus-x	830	—	~985	Automated safety check: Pass	None	8 mo ago
PDFeinverne/dotfiles	121	47 repos	~1.8k	Automated safety check: Pass	Proprietary	1 mo ago
Reportlabjimmc414/Kosmos	595	1 repos	~4.2k	Automated safety check: Pass	None	2 days ago
PDFguyi-a/pi-ling	106	—	~3.3k	Automated safety check: Pass	MIT	25 days ago

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Questions about PDF Verification Check 112b09

What does PDF Verification Check 112b09 do?

Verify generated PDF files using PyPDF2 to check page counts and integrity. PDF Verification Check 112b09 is an agent skill from HKUDS/OpenSpace.

When should I use PDF Verification Check 112b09?

PDF Verification Check 112b09 fits situations like: tasks that involve PDF.

How do I install PDF Verification Check 112b09 in Claude Code?

Run `npx skills add HKUDS/OpenSpace --skill pdf-verification-check-112b09 -a claude-code`. Or copy the skill folder (benchmarks/gdpval/skills/pdf-verification-check-112b09 in HKUDS/OpenSpace) into .claude/skills/pdf-verification-check-112b09 in your project. Claude Code loads it when a task matches its description.

How do I install PDF Verification Check 112b09 in Codex?

Run `npx skills add HKUDS/OpenSpace --skill pdf-verification-check-112b09 -a codex`. Or copy the skill folder (benchmarks/gdpval/skills/pdf-verification-check-112b09 in HKUDS/OpenSpace) into .agents/skills/pdf-verification-check-112b09 in your project. Codex loads it when a task matches its description.

Can I use PDF Verification Check 112b09 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 pdf-verification-check-112b09 -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/pdf-verification-check-112b09, .gemini/skills/pdf-verification-check-112b09, .github/skills/pdf-verification-check-112b09 and .opencode/skills/pdf-verification-check-112b09 in your project.

What does PDF Verification Check 112b09 need to run?

Going by SKILL.md and its folder, PDF Verification Check 112b09 needs the command-line tools its instructions call (pip and python). Our summary lists: Python 3.

Does PDF Verification Check 112b09 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 PDF Verification Check 112b09 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 PDF Verification Check 112b09 use?

PDF Verification Check 112b09 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 PDF Verification Check 112b09 use?

About 875 tokens (SKILL.md is roughly 3.5k 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 PDF Verification Check 112b09?

Skills that share tags, products or a category with PDF Verification Check 112b09: PDF (zai-org/ZCode, 7.7k stars), PDF (nuoyimanaituling/manus-x, 830 stars), PDF (einverne/dotfiles, 121 stars) and Reportlab (jimmc414/Kosmos, 595 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains PDF Verification Check 112b09?

HKUDS (a GitHub organization) maintains it in HKUDS/OpenSpace, which has 7,754 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 PDF Verification Check 112b09

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

PDF Verification Check

When to Use

Verification Steps

1. Install PyPDF2 (if not available)

2. Verify PDF Page Count and Integrity

3. Use run_shell for Verification

4. Verify Before Completion

Common Issues Caught

Example Workflow

Files

Compare with similar skills

Similar skills

More from HKUDS/OpenSpace

Related

Questions about PDF Verification Check 112b09