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Notes

Notes on making software useful.

We write about the decisions behind the software: understanding a workflow, choosing a data model, connecting systems, and deciding where AI belongs. These notes are a way to examine the work, share what we learn, and keep improving.

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Notes marked “English original” are available in English.

Product & Design

Start With the Smallest Valuable Loop

A product note on MVPs, user demand, and why the first useful loop is more important than the first complete system.

BillgoEnglish original

Product & Design

AI Features Should Earn Their Place

A product judgment note about when AI belongs in a workflow and when it is just a decorative shortcut.

BillgoEnglish original

Engineering

Agent Workflows Need Reviewable Context

An engineering practice note about using AI agents without losing ownership, traceability, or review quality.

BillgoEnglish original