property-stamp-pdf

Add property stamps to PDF documents. A continuous vertical strip of metadata is printed on the left margin of every page.

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Stamp Anatomy

The stamp follows this structure: propertyfun: @algorembrant [0001.v1] 9 March 2026 https://huggingface.co/algorembrant/ML-3m-trader

• Font: Times New Roman (Times-Roman)
• Size: 11 pt
• Hyperlinks: @algorembrant is clickable, and the repository URL is clickable.
• Position: Vertically centered on the left margin.

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Installation

1. Clone the repository

git clone https://huggingface.co/algorembrant/property-stamp-pdf
cd property-stamp-pdf

2. Install dependencies

pip install -r requirements.txt

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Usage

python arxiv_stamp.py <input.pdf> "<note_or_statment>"

Example

python arxiv_stamp.py rust_ml_trader_audit.pdf "Audit Report v1.0"

Output: rust_ml_trader_audit_stamped.pdf

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How It Works

1. The source PDF is read page by page using pypdf.
2. A stamp overlay PDF is rendered in memory using reportlab with the text rotated 90 degrees CCW.
3. The overlay is merged onto the original page.
4. The final PDF is written to disk.

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Author

Algorembrant (2026)

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License

MIT License.