Notatki z budowania oprogramowania.

81 of my last 109 pull requests merged without a second approval. This is what checked them.

Volod, założyciel

Three months of an open source repo built mostly with coding agents. Most of my own pull requests merged without a teammate's approval, so I looked at what actually verifies the code: lint rules that started as review comments, database constraints, agent QA against a real database, and LLM reviewers that are never a required check.

One setting cut my Claude Code cost per request by 39%. My first three mods: under 1%.

Volod, założyciel

I replayed a month of my Claude Code logs. Most of the cost is the model re-reading context, so one setting that compacts earlier cut the cost of a request by 39%. The first three mods I wrote: under 1%.

My agents write code faster than I can read it, so I built Treeix

Volod, założyciel

Running Claude Code and Codex in parallel worktrees moved the bottleneck from writing code to reading it. So I built Treeix, a free, open source AI workspace for Mac: every agent's diff, pull request and ticket in one app, and my comments go back as the next prompt.

I priced thirteen hosting providers for the same small app. The spread was 14x.

Volod, założyciel

One real app - 5,000 users, 1.6M requests, 108 GB of egress - priced on Hetzner, Railway, Render, Fly, Vercel, Cloudflare, Supabase, Firebase, DigitalOcean, Heroku, Sevalla, AWS and GCP with August 2026 list prices. Then priced again at ten times the traffic, because the slope matters more than the starting point.

One source of truth for Claude, Codex, and Copilot

Volod, założyciel

Different teammates use different AI agents, and each reads its own instruction file. rulesync keeps one set of rules, subagents, commands, and MCP config in sync across all of them.

Prisma vs TypeORM vs Drizzle: a fair benchmark, every caveat, every footgun

Volod, założyciel

I ran 12 scenarios on Railway against all three ORMs, dug into pg_stat_statements, fixed the unfair bits, and learned exactly why Prisma is slower, why TypeORM is leaner, and where Drizzle actually beats both.

Would I choose Deno over Node.js for my own project?

Volod, założyciel

After using Deno at work, here's my honest take on whether I'd pick it over Node.js for a personal project - spoiler: it's complicated.

REST API, tRPC or GraphQL? What would you choose for your new startup?

Volod, założyciel

Recently, I decided to bring one of my countless startup ideas to life, and I got stuck on choosing a communication protocol between the mobile app and the backend...

Why monorepo changed our development approach

Volod, założyciel

Every project begins with a simple idea and limited resources. Our startup was no exception...

How to bankrupt your client or why you should avoid using "on push" events on Github Actions

Volod, założyciel

Long story short, I almost bankrupted our client...

Should I migrate bare React Native project to Expo?

Volod, założyciel

The short answer is no. The long one - it depends...