Catalins Tech

I've been using both apps for a while and I couldn't resist comparing them. To me, there's one clear winner. 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 makes the app easier to navigate and read the chat responses. Claude Code feels to busy and crowded. Ultimately, I find Codex more appealing. Sections better delimited Codex has all the options in one place.

Generate an SSH Key Generate an SSH key using the Ed25519 algorithm: ssh-keygen -t ed25519 -C "<your-email-address>" After running the command, you’ll be prompted to choose where to save the key. Using the default file id_ed25519 will overwrite the previous content, and you may run into trouble with SSH authentication for other clients.

When you try to enable SSL for your newly deployed app with the dokku letsencrypt:enable <app-name> command, you might get the following error: =====> Enabling letsencrypt for <app-name> -----> Enabling ACME proxy for <app-name>...

I ended 2025 with huge motivation to improve my technical skills, build apps and share them publicly. I bought courses, noted down app ideas and started working on them. Then came the Christmas period and I thought it would be a good idea to take a short holiday and come back recharged. 2026 will be my year, I told myself. And I did come back recharged, but something felt off. I didn't have the motivation anymore. I felt burned out. It felt like none of my ideas were worth implementing.

💡 Subagents are specialised AI assistants designed to handle a specific type of work. The main agent can delegate work to them and when they finish it, they return the result to its parent. Lastly, the main agent returns the completed task to the user. It's the boring definition and you'll see a variation of it everywhere. But you can think of subagents as members of a team. All members have their specific area of expertise and they all contribute to a goal.

Good prompts are the difference between great and mediocre AI results. As a result, when you craft a prompt that works well, you'll want to save it so you can reuse it. Most of you have a collection of prompts that you keep reusing. And you know that manually copying and pasting the same prompts over and over again is slow and time consuming. The solution is "slash commands". 💡 Slash commands let you define custom commands for repeatable processes.

docker pull <image-name> - fetches an existing image from Docker Hub. The image is saved on your machine, so don't forget to clean up unused images to free up space. docker images - lists all the images saved on your machine. docker run <image-name> - fetches the image from Docker Hub, creates a new container and then runs the executable. docker run --rm <image-name> - same as docker run <image-name> with one addition: it deletes the container after it exits.

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 progress, thoughts, questions, feedback, and memes. Over communicate. Pick mature tools. Don't fall for the hype. Low self-esteem and overthinking kill more dreams than anything.

The internet is full of posts about building with AI. But 99% of them are landing page demos, proof-of-concepts and trivial tasks. It's rare to see expert developers sharing how they build production apps used by real people with AI. But that happened recently. Mitchell Hashimoto, the Ghostty creator, published a post about his AI usage while implementing a complex feature. Building a terminal is no easy task, so it made me super curious to see how he uses AI.

A while ago, I decided to move away from full-stack React frameworks and use a client-server setup. That is, separate the backend and the frontend, each being a standalone app. So, here’s the stack I ended up choosing: Backend: Hono + Bun + PostgreSQL + Zod + Prisma + TypeScript + Better Auth Frontend: React + Vite + TypeScript + TanStack Router It's a blast working with these technologies, and I don't regret the decision at all. I wrote about it here if you're curious.