Co-Developing with Generative AI

Introduction to Command Line Agents

Facilitated by Steve Zweibel, Stefano Morello, and Zach Muhlbauer

Monday, November 18, 2025

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Today's Tools

Site Studio

Terminal/PowerShell

Gemini CLI

Before We Start

  • Using lab computers? Sign in now
  • Brought your own computer? Make sure you can access your terminal/PowerShell
  • Everyone: We'll help you install required tools as we go
  • Need help? Just ask!

Ice Breaker: Site Studio

tools.cuny.qzz.io/site-studio/

Powered by Claude Sonnet 4.5

After the opening demo, share your ideas for follow-up prompts

Understanding Large Language Models

What's happening under the hood?

How Do LLMs Work for Coding?

  • LLMs are trained on billions of lines of code from open-source projects, documentation, and Stack Overflow
  • They predict what code should come next based on patterns
    • Can complete functions, suggest implementations, explain code, and debug errors
  • Command-line agents (like Gemini CLI) can execute commands, read/write files, and iterate on code
    • Different from chat interfaces
    • Actively interact with your development environment

Limitations for Coding

  • Generates plausible but broken code
    • Syntax may look right but logic can be flawed
  • Outdated libraries/syntax
    • May suggest deprecated methods or old versions
  • Security vulnerabilities
    • Can create code with security flaws that could be exploited
  • Can't understand your full codebase
    • Limited context window means it doesn't see everything

Prompt Engineering Basics

How you ask matters as much as what you ask

  • Be specific: "Create a Python function that sorts a list of dictionaries by the 'date' key" vs. "Help me sort some data"
  • Provide context: Share relevant code, error messages, project structure
  • Iterate: Refine your prompts based on results

Command Line Basics

Let's get comfortable with the terminal

What is the Terminal?

A terminal (or command line) is a text-based interface for controlling your computer

Instead of clicking buttons and icons, you type commands

Why use it?

  • More powerful and precise control
  • Essential for development work
  • How AI coding agents interact with your system

Opening Your Terminal

Mac:

  1. Press Cmd + Space
  2. Type "Terminal"
  3. Press Return

Windows:

  1. Press Windows key
  2. Type "PowerShell"
  3. Press Enter

Essential Commands

ls List files & folders in current directory
mkdir <name> Create a new folder
cd <name> Move into a specific folder
pwd Show your current location
cd .. Move up one level to parent directory

Installing Gemini CLI

Installation

Windows (PowerShell)

  • Install Node.js LTS: nodejs.org
  • Reopen PowerShell
  • Install Gemini CLI:
npm install -g @google/gemini-cli

macOS (Terminal)

  • Install Homebrew: copy command from brew.sh and run in Terminal
  • Add Homebrew to PATH:
echo 'eval "$(/opt/homebrew/bin/brew shellenv)"' \
  >> ~/.zprofile
eval "$(/opt/homebrew/bin/brew shellenv)"
  • Install Gemini CLI:
brew install gemini-cli

Login Setup

  • After installation, run gemini to authenticate with Google
  • Choose "Login with Google" and follow the browser prompt
  • Free tier: 60 requests/min, 1,000 requests/day
  • Having technical issues? Just ask!

Critical Questions

Before we build, let's pause and reflect

Ethical Challenges

  • Academic Integrity - How do we cite AI-assisted work? What's collaboration vs. skills offloading?
  • Bias & Fairness - AI models reflect biases in their training data
  • Environmental Impact - Training and running AI systems consume significant energy

Power & Labor Considerations

  • Who builds these systems? Often underpaid workers label data and moderate content
  • Who controls AI? Major tech companies control development and access
  • Privacy concerns - What data are you sharing? How is it used for training?

Why Use AI Coding Tools, then?

  • Prototyping and exploring ideas quickly
  • Helps learn new languages/frameworks by example
  • Debugging assistance and explaining error messages
  • Documentation and code explanation
  • Reduces context switching (stay in your terminal)
  • Democratizes access to coding for people without CS backgrounds

When NOT to Use AI

Use AI as a tool, not a replacement for understanding

  • When learning fundamentals for the first time
  • For sensitive or confidential data/code
  • When you need guaranteed accuracy (medical, legal, safety-critical)
  • When the goal is to develop your own problem-solving skills
  • When it would violate academic or professional policies

Choose Your Project Track

  • Website (e.g. Portfolio, link tree, small HTML/CSS/JS pages)
    • Example: Create an scaffolded study guide for command line basics with inline CSS and JavaScript
  • Visualization (e.g. Simple map, chart, or interactive element)
    • Example: Build an interactive timeline visualizing events in the history of computing based on the Wikipedia page for the topic

Start with a README

  • Ask the agent to create a README.md file first
    • This helps you understand and approve the workflow before building
  • The README should:
    • Describe your project idea
    • Outline the project structure
    • List key features or goals

Hands-On Activity

After approving the README.md, work with the agent to implement the project components

Duration: 15-20 minutes

We'll walk around the room to help

Choose your track and start building!

Let's Reflect

What did we learn?

Discussion: Your Experience

  • What worked well? When did the AI agent help most?
  • What didn't work? When did you get stuck or frustrated?
  • Surprises? Did the AI do anything unexpected (good or bad)?
  • Trust & verification: How did you know if the generated code was correct?

Critical Assessment

Think about these questions:

  • When is AI-assisted coding appropriate for your work?
  • When might it be inappropriate or problematic?
  • How would you document/cite that you used AI in a project?
  • What skills do you still need to develop yourself?

Resources

Claude Code - AI assistant for your entire development workflow

Google AI for Students - 1-year free trial (requires SheerID verification)

GitHub Copilot - AI code suggestions in your editor

GitHub Desktop - Visual Git interface, no command line needed

Thank You!

Questions?

Happy building!