Hacker News: vianarafael

I Taught Myself to Vibe Code: A Free Bootcamp

vianarafael — Sat, 30 Aug 2025 13:23:21 +0000

Article URL: https://rafaelviana.com/posts/vibe-coding

Comments URL: https://news.ycombinator.com/item?id=45074448

Points: 3

# Comments: 0

I Yelled My MVP Idea and Got a FastAPI Back End in 3 Minutes

vianarafael — Sun, 18 May 2025 08:16:30 +0000

Article URL: https://rafaelviana.com/posts/yell-to-code

Comments URL: https://news.ycombinator.com/item?id=44019815

Points: 2

# Comments: 0

I Built a Tool That Tells Me If a Side Project Will Ruin My Weekend

vianarafael — Sun, 11 May 2025 07:29:52 +0000

Article URL: https://www.rafaelviana.io/posts/code-chrono

Comments URL: https://news.ycombinator.com/item?id=43952075

Points: 3

# Comments: 0

I Hacked a Japanese Corporate Exam with a Local AI Model

vianarafael — Fri, 09 May 2025 15:01:27 +0000

Article URL: https://www.rafaelviana.io/posts/line-badge

Comments URL: https://news.ycombinator.com/item?id=43937550

Points: 2

# Comments: 0

New comment by vianarafael in "How to start a school with your friends"

vianarafael — Fri, 09 May 2025 00:46:44 +0000

This is such a refreshing inversion of the ‘edtech’ trend—rather than trying to scale education through software, FractalU scales motivation through community. Makes me wonder: instead of designing better UIs for MOOCs or LLM tutors, maybe the real unlock is designing better social containers for learning.

New comment by vianarafael in "Notes on rolling out Cursor and Claude Code"

vianarafael — Fri, 09 May 2025 00:35:06 +0000

You mentioned using Claude to help set up a GitHub Action for reviewing Rails migrations. How do you see agentic tools like Claude evolving in their ability to reason about big-picture concerns—not just boilerplate generation, but things like validating database changes, architectural decisions, or spotting long-term risks that aren’t immediately visible?

New comment by vianarafael in "Ask HN: What are you working on? (April 2025)"

vianarafael — Mon, 28 Apr 2025 08:30:48 +0000

Last year, I repurposed an old laptop into a simple home server.

Linux skills? Just the basics: cd, ls, mkdir, touch. Nothing too fancy.

As things got more complex, I found myself constantly copy-pasting terminal commands from ChatGPT without really understanding them.

So I built a tiny, offline Linux tutor:

  - Runs locally with Phi-2 (2.7B model, textbook training)
  - Uses MiniLM embeddings to vectorize Linux textbooks and TLDR examples
  - Stores everything in a local ChromaDB vector store
  - When I run a command, it fetches relevant knowledge and feeds it into Phi-2 for a clear explanation.

No internet. No API fees. No cloud. Just a decade-old ThinkPad and some lightweight models.

Full build story + repo here: https://www.rafaelviana.io/posts/linux-tutor