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Catalin's Tech

A software developer who enjoys sharing knowledge with others

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Codex vs Claude Code Desktop Apps

I've been using both apps for a while and I couldn't resist comparing them. I judge them based on my gut feeling and the following: Better spacing all around the app With Codex, the options and sections are better spaced out. It feels less cramped, which

Add SSH Keys to a Hetzner VPS

Learn how to generate SSH keys, add them to your Hetzner VPS, configure ssh-agent, and create a host alias for easier server access.

Fix Dokku Let’s Encrypt SSL Error

Learn how to fix Dokku Let’s Encrypt 403 “Could not obtain certificates” error when enabling SSL for a new app.

It’s Not the AI, It’s the People

AI isn't the problem. The people showing fake demos and charts for clout and sales are. Why I stepped away from the online world to recalibrate.

What The Hell Are AI Subagents?

Subagents act like team members with their own context, prompt, tools, and permissions. Learn when to use them and how to define them.

The Practical Guide to AI Slash Commands

Learn what AI slash commands are, how they work, and how to create reusable workflows with real examples.

Docker Commands

A list of commonly used Docker commands.

50 Things I Learned in the Last 2 Years

Be very specific when returning data from the database. Don’t blindly select all fields. Only return what’s needed. Many people get way further ahead in life than you with fewer skills simply because they have the courage to try. Communication is important in remote teams. Share

How Experts Use AI: Mitchell Hashimoto

Discover how Mitchell Hashimoto, creator of the Ghostty terminal, integrates AI in his coding workflow.

Migrating to TanStack Start

Learn how to migrate a single-page application (SPA) to TanStack Start for SSR and SEO. It covers Vite, auth, Hono RPC, and theme handling.

How to Easily Self-Host N8N

This article teaches you how to self-host N8N on your server with Dokku.

Windsurf VS Warp AI

This video compares Windsurf and Warp AI. The comparison of these 2 AI tools is based on real-world scenarios.

OpenAI Codex vs Warp AI vs Claude Code

This video compares Warp AI with OpenAI Codex and Claude Code. The comparison of these 3 AI tools is based on 4 real-world scenarios.

Connect to Dokku PostgreSQL Database on Local Machine

Learn how to connect to a PostgreSQL database hosted on Dokku from your local machine.

Fix Better-Auth's getSession In TanStack Start

Learn how to fix the issue with the getSession function from Better-Auth in TanStack Start.