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.
npx agentmods add skills/cxcscmu/skilllearnbench/pdf-inspectionnpx skills add cxcscmu/SkillLearnBench --skill pdf-inspectiongit clone --depth 1 https://github.com/cxcscmu/SkillLearnBenchWrote 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.
[](https://agentmods.dev/skills/cxcscmu/skilllearnbench/pdf-inspection)<a href="https://agentmods.dev/skills/cxcscmu/skilllearnbench/pdf-inspection"><img src="https://agentmods.dev/badge/skills/cxcscmu/skilllearnbench/pdf-inspection.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00022 | $0.00303 |
| Opus 5 | $0.00011 | $0.00151 |
| Sonnet 5 | $0.00004 | $0.00061 |
| Haiku 4.5 | $0.00002 | $0.00030 |
Grade A, and why
pdf-inspection 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 2d ago.
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.
What it actually says
PDF Inspection Skill
This skill covers how to identify and list form fields in a PDF document using the pypdf library.
Prerequisites
- Python 3.x
pypdflibrary (pip install pypdf)
Usage Patterns
Listing All Fields
To list all fields and their types:
import pypdf
def list_pdf_fields(file_path):
reader = pypdf.PdfReader(file_path)
fields = reader.get_fields()
if not fields:
print("No fields found.")
return
for name, field in fields.items():
field_type = field.get("/FT")
print(f"Field Name: {name}, Type: {field_type}")
list_pdf_fields("document.pdf")
Understanding Field Types
/Tx: Text field/Btn: Button (checkbox or radio button)/Ch: Choice field (dropdown or list box)/Sig: Signature field
Identifying Checkbox Values
Checkboxes often use "Off" and another value (like "Yes" or "On"). You can find these in the /AP or /V keys if they have a value.
field_props = reader.get_fields()["field_name"]
print(field_props.get("/V")) # Current value
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.
- 2d ago First seen · 53 lines · 22 tokens per session scan A 821b43ed8b9f
pdf-inspection is a skill published in the GitHub repository cxcscmu/SkillLearnBench (83 stars, last pushed 1mo ago), licensed MIT. It adds 22 tokens to every session and 303 once invoked, about $0.0001 per session on Opus 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 2026-09-03.
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Redact text from PDF documents for blind review anonymization.
marker
Convert PDF documents to Markdown using markersingle. Use when Claude needs to extract text content from PDFs while preserving LaTeX formulas, equations, and document structure. Ideal for academic papers and technical documents containing mathematical notation.
Use this skill when a task requires reading, creating, splitting, merging, or otherwise manipulating PDF files.
Use this skill whenever the user wants to do anything with PDF files. This includes reading or extracting text/tables from PDFs, combining or merging multiple PDFs into one, splitting PDFs apart, rotating pages, adding watermarks, creating new PDFs, filling PDF forms, encrypting/decrypting PDFs, extracting images, and…