A friend wanted to pitch a business idea to me, but forgot to bring an NDA for me to sign. I had my tiny purse notebook open and was jotting something down in #sitelenpona, and he asked if I wanted to just write the NDA myself real quick.

"What, in #tokipona?"

"Yeah sure."

And so behold. I'm sure this isn't the first contract written in toki pona, but I wonder if it's the first in handwritten sitelen pona.

@tamzin the first (or one of the first) contracts written in toki pona is quite famous for being such, and even appears on the toki pona Wikipedia article.
https://en.wikipedia.org/wiki/Toki_Pona#Sample_texts
it does seem however that contract was written up as a proof of concept by the inventor of sitelen siteleln.
https://www.jonathangabel.com/2012/lipu-lawa-pi-esun-kama/
so yours might be the first genuine contract.
Toki Pona - Wikipedia