Building a Next.js app with OpenAI Codex Local Agent
Press play on the video. It'll jump straight to the section that answers the
title above — no need to watch the full video.
OpenAI Codex
SaaS
Coding
Software Development
A step-by-step guide to setting up a project in VS Code using the Codex plugin, importing PRD files, and prompting the Local Agent to write app code automatically.
Local vs. Cloud Agents
Local Agents work directly on files within your IDE (similar to Cursor or Claude Code), while Cloud Agents (openai.com/codex) can perform tasks asynchronously on the web even when your computer is offline.
Choosing 'Low' vs 'High' Models
While 'High' models are considered 'smarter,' the 'Low' model is actually sufficient for building complex applications faster while consuming fewer tokens.
'Sleep-and-Build' Productivity Tips
You can use Cloud Agents to handle technical or marketing tasks before you go to bed, so your application is ready or further along by the time you wake up.
More from AI-Powered Coding & App Development
View All
Analyzing and Documenting Code with Codeium Chat Context
Codeium
Auto-Fixing Python Errors with Codeium Refactor
Codeium
Auto-Generating E2E Tests using Cursor CLI in YOLO Mode
Cursor
Playwright
Automated security reviews with AI Code Review
GitHub
BugBot
Fast-track debugging with OpenAI Codex
OpenAI Codex
Build a Pomodoro app using GPT-5 Codex CLI and Claude Code
Claude Code
OpenAI Codex