Notes from the studio

What we're building, what we're learning, and what's shipping next.

( 15 posts )

FeaturedAI Integration

IBM calls it a building inspector. We ran the inspection.

IBM says AI coding agents work like building inspectors. We ran the five-step loop on a production SaaS — what held up, what broke, and the steps we'd add.

July 29, 20266 min

Blueprint cross-section of a building under an X-ray scan, with hidden dependencies highlighted in lime

August 12, 2025

main-server-action-article

web development

Server Actions and Mutations in Next.js 15

How Server Actions work in Next.js 15: defining them, why each one is a public endpoint, pending states with useTransition, and a data access layer.

August 12, 20255 min

Build the API with Next.js only

web development

Build the API with Next.js only

When and how to build an API with Next.js alone: Route Handlers, dynamic routes, proxying an existing backend, webhooks, custom auth and shared wrappers.

April 10, 202510 min

October 20, 2024

main-tips-tricks

web development

Some of the little tips & best practices for React/Next.js developers

Ten practical habits for React and Next.js: no hardcoded values, a clear folder structure, simple components, and filters and pagination kept in the URL.

October 20, 202410 min

September 15, 2024

nextjs-main

web development

Next.js 14 some of my key observations after one year of the extensive use.

Next.js 14 App Router lessons from a year of heavy use: 'use client' placed too high, server and client component myths, and leaking server data.

September 15, 202415 min

AI-gibbarosa

Implementing an AI-powered Shopping Assistant

Building an AI shopping assistant for a MedusaJS store with the Vercel AI SDK: Core, UI and RSC, plus the actions file and the page code.

June 13, 20248 min

clerk-main

Clerk, Next.js 14 and Drizzle ORM boilerplate

A Next.js 14 starter with Clerk authentication and Drizzle ORM on Neon Postgres, step by step: provider, middleware, components and database setup.

April 1, 20248 min

February 3, 2024

main-next-auth

web development

NextAuth Credentials — easy signup & login with email & password (Next.js 14 App router and Zod resolver)

Email and password sign-up and login in Next.js 14 with NextAuth Credentials, Zod validation and Postgres, including restricted pages.

February 3, 202415 min

January 8, 2024

main-assistant-openai

Assistants API (OpenAI): Real-world simple example - money transfer online FAQ

A hands-on test of the OpenAI Assistants API: a money-transfer FAQ assistant built step by step, from file retrieval to threads, runs and responses.

January 8, 20243 min

December 1, 2023

p24-main

web development

Next.js 14 payment gateway integration with P24 (Przelewy24)

Adding Przelewy24 (P24), the Polish payment gateway, to a Next.js 14 shop: a cart modal that starts the payment and the API endpoint behind it.

December 1, 20238 min

November 22, 2023

stripe-checkout

web development

Easy Stripe checkout with use-shopping-cart and Next.js 14

Stripe Checkout in a Next.js 14 shop with use-shopping-cart: the cart provider, cart modal, add-to-cart button, and products and prices in Stripe.

November 22, 202310 min

map-main

GPT-4 Model help in Geo Mapping at the large scale.

Can GPT-4 help with geo-mapping at scale? A real business-risk task, checking which sales points fall inside an area of interest, prompt by prompt.

July 16, 20233 min

address-main

Get full address from geo coordinates using Python for free

Turning geo coordinates into full addresses for 4,000+ records with Python, pandas and the free Nominatim geocoder.

July 6, 20233 min

mailbox

Python with Pgeocode and Pandas. Postal codes to geo coordinates

Converting postal codes to latitude and longitude offline with Python, pgeocode and pandas, with distance queries and data for 83 countries.

April 5, 20233 min

February 4, 2022

long-lat

Pydeck, Python data visualization. Column Layer on Carto maps

Visualising large geo datasets in Python with pydeck (deck.gl) and pandas: a 3D column layer on Carto basemaps.

February 4, 20223 min

Reading is nice. Shipping is better.

Tell us what you're building — we reply within one business day.