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Vibe coding complex changes in Rust

Jon Gjengset · demo · Watch on YouTube

LLMs & generative AIC, C++, Rust, Go & systems languagesSoftware practice, open source & careers

What it is

Jon Gjengset spends about three hours livecoding complex changes in a Rust codebase with agentic AI tools, testing his hypothesis that AI is weak at non-pattern work. He documents where Claude Code helps and where it struggles.

Why Hacker News recommends it

Pointed to as a non-promotional, realistic long session of an experienced engineer working with AI on non-trivial code.

  • 2 people recommended it
  • 2 different months
  • 0 strong recommendations
  • first 2025, last 2026

What HN commenters said

  1. “Worth of a watch if that is a style you want to explore.”

    Fastidious engineer livecoding with AI control

    sitkack, 2025-08 · Recommendation · in “AI doesn't lighten the burden of mastery”

  2. “I found this one and sat down and watched the whole three hours.”

    Non-promotional vibe coding session worth watching in full

    ontouchstart, 2026-01 · Recommendation · in “Profession by Isaac Asimov”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: vibe coding, claude code, rust, agentic ai, livecoding

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