Eyo! onisaint here. I am a product engineer, I design and build products.I ask a lot of why. Nerdy about coffee, books, anime, badminton, and solo travel. Opinions are my own.

random stupidity・
design work
noises having meanings・politics and religion
rabbit hole・marry me
talk to me・

writings

01 Jan 2026

A Dream

A farm of sunflowers
13 Dec 2025

Test User Feature, Not code

Only the guy who worte the code like it, true story!
12 Nov 2025

Selling to Machines

Agentic to Customers (A2C) and Direct to Agentic (D2A)
view all

useful things

Weeks on earthwebsite
Reactive storegithub ・ jsr.io
Validate emailgithub ・ jsr.io
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前進

Go forward

DND

Me time!

09:14:30

20 Mar 2026 India [ 21.10% complete ]