Igor Costa igorcosta

Cloudflare Durable Objects — Deep Research Report

Date: 2026-07-15 Sources: Official Cloudflare Durable Objects documentation (fetched live)

Summary

Durable Objects are a special kind of Cloudflare Worker that uniquely combines compute with storage in a single, globally-unique, single-threaded instance. They enable stateful serverless applications — real-time chat, multiplayer games, collaborative editing, booking systems, and distributed coordination — without requiring developers to build serialization, locking, or coordination primitives themselves.

Verified Spec-Driven Development (VSDD)

The Fusion: VDD × TDD × SDD for AI-Native Engineering

Overview

Verified Spec-Driven Development (VSDD) is a unified software engineering methodology that fuses three proven paradigms into a single AI-orchestrated pipeline:

Spec-Driven Development (SDD): Define the contract before writing a single line of implementation. Specs are the source of truth.
Test-Driven Development (TDD): Tests are written before code. Red → Green → Refactor. No code exists without a failing test that demanded it.

After the last git commit

How we got here

It's 7th of May 2025, and I'm leaving. Before I go, I'd like to share my vision of the future. If you're reading this in 2030, you probably wish you'd read it five years earlier. Consider this a time capsule from a future that arrived faster than expected.

Let’s rewind. It’s hard to believe developers once worked without AI. In domains like embedded systems, mining infrastructure, and medical software, adoption was slower due to regulation and legacy constraints. But everywhere else, including browsers, APIs, simulations, and cloud environments where AI coding agents took over.

Why did AI take over coding so quickly? One word: economics. In 2021, a junior developer in San Francisco earned over USD $260,000 to build basic prototypes. Managing 100 of them cost over $26 million per year. By 2025, an AI-powered team could deliver equivalent output at less than six percent of that cost. Quality improved, fatigu

📖 Managing dual repositories on GitHub

Managing multiple repositories that serve distinct but interconnected purposes can be a challenging task 😓. This scenario is common when an organization wishes to contribute to an open-source project 🌐 while also maintaining an internal space for private collaboration 🔒.

The challenge here lies in keeping these repositories in sync 🔄 without manual intervention, ensuring that changes made to one repository 📁 are accurately reflected in the other 📁.

In this step-by-step tutorial 📃, we'll walk through a use case where a customer wants to contribute to an open-source project 💻 and, at the same time, collaborate internally within their organization 🏢.

We will:

Changing the ownership of the existing repository. [Follow this steps](https://docs.github.com/en/enterprise-cloud@latest/account-and-profile/setting-up-and-managing-your-personal-account-on-gi

get_org_languages.py 🚀

Python script to get all the programming languages in a GitHub organization and return a total number of repos using the programming language.

Hard requirements: 🐍

Make sure you know Python 3.0 or older.
Make sure you have a GitHub Personal Access Token with the read:org and repo:status permissions. 🔐
Install the Python dependencies:

Based on https://docs.getutm.app/guides/windows/

Get UTM for Mac - the App Store version is offered merely as a way to support the developers, since it's paid, but has the same features as the free build;
Obtain scripts that bootstrap an arm64 Windows 11 22H2 (I've chosen Windows Home edition and not Pro);
brew install aria2 cabextract wimlib cdrtools minacle/chntpw/chntpw;
cd into the directory extracted in step 1 and bash uup_download_macos.sh - this will produce an ISO;
In the UTM app, create a new “Virtualize” machine and mount the ISO file from the previous step;
Check “Install drivers and SPICE tools”;
Boot the VM and go through the Windows installer;
Boot the installed OS and finish the SPICE tools installer that should pop up by itself, then reboot the OS;

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Balloon Popper</title>
	<style>
	body {
	margin: 0;
	background: linear-gradient(to bottom, #87CEEB, #E0F6FF);

	AWSTemplateFormatVersion: '2010-09-09'
	Description: 'GPU instance for Ollama with flexible instance type selection (P4d A100 or G5 A10G)'

	Parameters:
	InstanceType:
	Type: String
	Default: 'g5.12xlarge'
	AllowedValues:
	- 'g5.2xlarge' # 1x A10G (24GB) - $1.006/hr
	- 'g5.4xlarge' # 1x A10G (24GB) - $1.624/hr

	#!/bin/bash

	# Make sure you change this script chmod to executable

	# Set your GitHub username and access token
	USERNAME={REPLACE_ME}
	ACCESS_TOKEN={REPLACE_ME}

	# Set the path to the directory where you want to store your repositories
	LOCAL_REPO_DIR=/path/to/your/local/repo/directory