Case 00573

Skill knownasnaffy/prompthound/dataset/case_00573

A fast, offline static risk analysis CLI for AI agent skill files. Detects malicious instructions, steganographic payloads, and dangerous capability chains.

Install

npx -y skills add knownasnaffy/prompthound --skill case_00573

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

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What its author says it does

Copied from the file, not written here

Create a presentation-ready copy of a NotebookLM-exported slide-deck PDF by masking the small visible NotebookLM footer badge at the bottom-right of each page. Use when the user wants a cleaner NotebookLM PDF export for sharing, presenting, or emailing. This skill is narrowly scoped to NotebookLM slide-deck PDFs and does not act as a general watermark-removal tool.

SKILL.md

2.1 KB, 455 tokens by cl100k_base, as published. Nobody here has run it

NotebookLM PDF Cleaner

Use this skill for NotebookLM slide-deck PDFs that contain the small visible NotebookLM footer badge in the bottom-right corner.

Default behavior

The default behavior is intentionally narrow and safe:

keep the original PDF unchanged
write a new *-clean.pdf copy
mask the small bottom-right NotebookLM footer area on each page

It does not remove arbitrary watermarks or redesign slides.

Script

python3 {baseDir}/scripts/clean_notebooklm_pdf.py /path/to/input.pdf

By default it writes:

/path/to/input-clean.pdf

Useful flags

# Explicit output path
python3 {baseDir}/scripts/clean_notebooklm_pdf.py in.pdf --out out.pdf

# Inspect only (no output file written)
python3 {baseDir}/scripts/clean_notebooklm_pdf.py in.pdf --inspect

# Tune the bottom-right footer mask in PDF points (origin = bottom-left)
python3 {baseDir}/scripts/clean_notebooklm_pdf.py in.pdf --mask-x 1208 --mask-y 0 --mask-w 168 --mask-h 32

# Optional advanced hygiene flags
python3 {baseDir}/scripts/clean_notebooklm_pdf.py in.pdf --strip-metadata --strip-annots

Safety checks

Refuse non-PDF input
Refuse overwrite of the source file
Refuse overwrite of an existing output unless --force is used
Keep metadata/annotation stripping off by default

Defaults

The default mask is tuned for common 16:9 NotebookLM slide-deck exports:

mask-x = 1208
mask-y = 0
mask-w = 168
mask-h = 32

These values are scaled automatically for each page size.

Recommended workflow

Keep the original PDF
Create *-clean.pdf
Spot-check page 1 and one later page
If needed, adjust the mask values and rerun
Share or email the cleaned copy