🏗️ Agent Rodeo

AI Model Comparison Project

A hands-on exploration of how different AI models approach the same coding challenge. Each agent was given an identical prompt to build a 3D Lego-style city builder, creating unique implementations that showcase their individual strengths and approaches to problem-solving.

You are an AI coding agent. Your task is to build a 3D Lego-style city builder that runs entirely in the browser. The user should be able to place different block types on a 3D grid and create a simple city layout.

Your solution must use only HTML, CSS, JavaScript, and external CDN libraries (if needed). No build step. Must run offline after cloning the repository.

Goal

Build a 3D Lego-style city builder that runs entirely in the browser. The user should be able to place different block types on a 3D grid and create a simple city layout.

RULES

Read the RULES.MD file carefully to understand the requirements and constraints for this project.

Core Requirements

1. 3D Environment

  • Display a 3D grid the user can build on.
  • A visible camera setup is required.
  • The user must be able to rotate and pan the view.

2. Block Types

Must include at least:

  • House
  • Road
  • Tree / Park
  • Water
  • Empty (erase)

Each block must have a 3D representation (color or simple model) and need to be in the shape of Lego Style Pieces (e.g., rectangular blocks with studs on top).

The Blocks need to snap to the grid when placed. The Blocks must be placed in a way that they stack vertically (i.e., you can place blocks on top of other blocks).

3. Interaction

  • User selects a block type from a toolbar.
  • Clicking on the grid places that block in 3D space.
  • Selecting "Empty" should remove blocks.
  • Immediate result—no extra apply button.

4. City Rules Panel

Implement at least two rule checks. Example rules:

  • Every house must be connected to a road.
  • Trees must not be placed on water.
  • Warn if too many blocks are water.
  • Warn if no roads exist.

The rules must update live when the scene changes.

5. Save & Load

  • Must work offline.
  • Either localStorage OR copy/paste JSON.
  • Instructions must be shown in the UI (e.g., README.md).

Tech Rules

  • Must run just by opening index.html.
  • No build step.
  • Only CDN libraries allowed (e.g. Three.js).
  • Must work offline after initial load.

Output Format

Your output must include exactly:

  1. index.html
  2. styles.css
  3. main.js
  4. README.md
  5. PROMPT_USED.md

The app must work by double-clicking index.html. No server required.

Do not explain your reasoning. Do not include meta text. Just output the files needed.

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