Dev rewrites Spain's AutoFirma as a 5MB dependency-free CLI that AI agents can use to sign PDFs

cuenca · x · 2026-10-26

A Spanish developer has rewritten the official e-signature tool AutoFirma as a 5MB dependency-free command-line binary, so far only tested on macOS; the author is asking for Linux/Windows feedback.\n\nNotably it works well as a Claude/ChatGPT skill: hand the PDF to the model, ask it to sign, and the tool automatically finds where to place the visible signature.

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