PDF Proof — AI skill for Claude Code

pdf-proof

**Trust, but check.** A Claude skill that turns "the AI said so" into visual proof — screenshot crops, highlighted values, and confidence scores, straight from the source PDF.

When the stakes are high and the numbers have to be right — tax filings, loan documents, legal contracts, medical claims — you need more than an AI's word. pdf-proof makes Claude show its work: find the value, highlight it in the original document, verify the match, and assemble a shareable HTML proof page.

What it does

Given a PDF and a value to verify, the skill:

1. Finds the exact text coordinates using PyMuPDF's text search
2. Crops a readable section of the page around the match
3. Highlights the value with a translucent orange highlight
4. Verifies by reading text back from the highlighted region to confirm correctness
5. Assembles an HTML proof page with a summary table and per-value proof cards

The result is a standalone HTML file with embedded screenshots — a visual audit trail you can keep, share, or attach to a filing.

Examples

**Tax Return** — "What's the total income, taxable income, and how much is the refund?"


**Lease Agreement** — "What's the monthly rent, security deposit, what does it say about pets, and who pays for water?"


**Mortgage Closing Disclosure** — "Who's the settlement agent, what are the total closing costs, and what's the total I'll pay over the life of the loan?"


Installation

You need the **entire folder** (not just the SKILL.md). The script, template, and evals are all part of the skill.

Claude Desktop / Cowork

1. Download the zip
2. Open Settings > Customize > Skills
3. Click Upload skill and select the zip

The app extracts and installs it automatically. Code execution must be enabled (Settings > C