SheetProof

SheetProof "Just drop in a Pic of your receipt or anything and it uploads to the sheet" From shoebox to spreadsheet — without touching a keyboard. SheetProof was built from a real day-job problem: at a print shop, job-tracking rows are hand-typed into spreadsheets from printed paper tickets. That work is slow and error-prone, and it is the same work facing any shop, studio, club, team, creator, author, or household whose records arrive on paper or in messy files. Drop in a receipt photo or another messy document and SheetProof returns a clean spreadsheet with a complete record of what it changed. Intake covers HEIC and WebP photos,.txt files, PDFs, CSVs, and emails. Pic drop is free and keyless. Pictures are read through the Front Desk — a small relay that calls Meta's muse-spark-1.3 model server-side — so the person using SheetProof needs no API key and no sign-in for pic drop. This was proven end-to-end on the developer's own PC with his own real receipt photos on 2026-10-31. There is no SheetProof account or sign-in of any kind. The file-based core works offline; the AI reading is the online part. Two rules govern the product. First, the AI never sources a number: if a figure is not on the document, it does not exist, and nothing is invented to fill a gap. Second, every change SheetProof makes is logged — the change log is the trust feature, so a cleaned sheet can always be checked against the paper it came from. Accuracy, stated exactly: on a deterministic benchmark, SheetProof scored 335 of 335 fields correct, and 25 of 25 on an adversarial attack set. That benchmark ran with a stub brain (StubBrain), so it measures the deterministic cleaning core — it does not measure live-AI extraction quality, and it is not presented as doing so. The automated test suite stands at 1,538 tests passing in the repository tree. Spreadsheet delivery, stated exactly: a live write into Google Sheets is proven. For Microsoft Excel, the proven path is the finished-file download. The Excel COM and LibreOffice Calc UNO integrations are built and have been tested against fake transports only; they are not claimed as proven. SheetProof also has a second door, Second Eyes: glance at a shelf, speak a count, and the confirmed count lands in the same spreadsheet. It was verified live on 2026-10-29: 42 screws, 16 bolts, and 7 tape measures were read exactly; a deliberately wrong spoken count ("18 bolts") was blocked with an exact callout and nothing landed until it was corrected. The total cost of that live test was $0.12. Two disclosures about the demo film: the demo (v3, 3 minutes 39 seconds) was the best of 3 disclosed extraction takes for its receipt run. And SheetProof does not auto-flag voided entries. Live verification — Oct 31, 2026: a full live sweep over 49 documents (667 scored cells) scored 96.3% exact match (642/667), with 8 ungrounded invented values after declared grounding; the live auditor probe caught its planted error case (1/1) with no false positives.