Today I didn't build a single feature. I made sure I can legally take ₹200 from someone.

I'm building Opviva — a security agent for AI-built apps — solo, out of Coimbatore. I thought the hard part was the product (proving an exploit is real, opening the fix as a PR). Nobody warned me about the other half.

Today's to-do list, as a founder:

• Turn on billing so the app actually charges credits (it was quietly free this whole time 🙃)

• Generate a proper GST tax invoice on every payment — company name, GSTIN, CIN, the customer's billing address, CGST/SGST vs IGST depending on which state they're in

• Make sure the invoice says Aarion Labs and Technologies Private Limited (the company), not "Opviva" (the product) — because putting a product name next to a GSTIN is a real legal problem

• Hide the internal credit ledger from customers

Zero of that is visible to a user. Zero of it is fun. All of it is the difference between "cool side project" and "a company that can take money."

The lesson I keep re-learning: shipping the feature is maybe 40% of the work. The invoice, the tax logic, the "what happens if they close the tab mid-payment" — that's the other 60%, and it's the part that makes it real.

Solo founders — how much of your week goes to this invisible plumbing vs. actual product? I feel like I under-estimated it by 3x. 👇