Can a newbie really vibe code an app? I tried Cursor and Replit to find out

I'm not a programmer, but I tried four vibe coding tools to see if I could build anything at all on my own. Here's what I did and did not accomplish.
GitHub

A Python-based AI agent that replicates Cursor's coding assistant capabilities, enabling function calling, code generation, and intelligent coding assistance with Claude ...

read_file: Read file contents with flexible line range control edit_file: Make precise edits to files with clear instructions Supports complete file replacement ...
IEEE

A 66-fs-rms Jitter 12.8-to-15.2-GHz Fractional-N Bang–Bang PLL With Digital Frequency-Error Recovery for Fast Locking

Abstract: This article presents a fractional-N frequency synthesizer architecture that is able to overcome the limitations of conventional bang-bang phase-locked ...
IEEE

A 23.2-to-26-GHz Low-Jitter Fast-Locking Sub-Sampling PLL Based on a Function-Reused VCO-Buffer and a Type-I FLL With Rapid Phase Alignment

Abstract: This article presents a type-II sub-sampling phase-locked loop (SSPLL) that achieves low jitter, low spur, and sub-$\mu $ s locking time when synthesizing millimeter-wave (mm-wave) ...