Scott and Mark learn to Vibe Check with Cassidy Williams | LIVE114

Cassidy Williams joins Scott Hanselman and Mark Russinovich for a live Microsoft Build session where they “vibe check” an AI-assisted demo, digging into what the AI produced versus what required human fixes, and where the seams show up when you push a prototype toward something more real.

Overview

In this live Build showcase, developers present AI-assisted apps, agents, tools, and workflows to Mark Russinovich and Scott Hanselman. The discussion focuses on how the demo works, what parts were actually built by AI, where the rough edges are, and how to judge whether the result is just a clever prototype or something that could be made production-ready.

Session flow (from the provided chapters)

Experiment-first framing

• Cassidy calls out that the approach is unconventional and done for fun experimentation.
• The group discusses the creative motivation: making something “neat” while intentionally leaning into the show’s theme.

Technical stack overview

• The project is described in terms of:
  • JavaScript
  • WebAssembly
  • CSS

Demo and debugging

• Cassidy adjusts the setup to make the code/demo easier to follow.
• The session includes fixing AI-generated errors manually.
• They discuss the balance between human creativity and AI assistance.

Stress-testing the app

• The demo is pushed by testing application limits, including query restrictions.
• The group talks about how the AI responds and whether it “agrees” with the approach.

Wrap-up

• Closing remarks include an open-source project mention before transitioning to a sponsor break.