15:I[981,["658","static/chunks/658-a698693f56d0116a.js","183","static/chunks/183-6beeeb801c274aaa.js","474","static/chunks/app/%5Btype%5D/layout-631c4730b83c8223.js"],"Posts"] 16:T4af,Hey HN! I'm one of the folks behind Documenso (open-source document signing).

We spent years combining pdf-lib with a custom Rust signing library. It worked, but real-world PDFs kept finding edge cases.

Instead of waiting for a better library to appear, we wrote our own.

LibPDF:

- Lenient parsing with brute-force recovery (inspired by Apache PDFBox) - Digital signatures with no native bindings and full PAdES support - Incremental saves that preserve existing signatures - Encryption (AES-256, AES-128, RC4) - TTF/OTF font subsetting (ported from PDFBox's fontbox)

API inspired by pdf-lib.

Still in beta, but we use it in production at Documenso already. You might hit a few bugs that we haven't yet, if you do let us know!

https://documenso.com/blog/introducing-libpdf-the-pdf-librar... https://github.com/libpdf-js/core https://libpdf.dev17:T494,Hi HN,

I documented something I kept running into while debugging my own reactions under pressure.

There appears to be a tiny runtime gap between incoming signal (trigger) and outgoing action.

If that gap collapses, behavior executes automatically. If it stays open even briefly, explicit choice becomes available.

I formalized it as a minimal behavioral control primitive:

Origin → Signal → OP Gap → Zero Point → Operator Point → Choice → Action → Return

No beliefs, no mindset, no therapy framing. Just a control discontinuity observable in real time.

OP Gap itself doesn’t decide anything. It simply exposes a control surfac

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