What you can build
01Understand a repository
02Implement changes
03Run tests
04Review diffs
CX
AI development
Codex
An agent designed to understand codebases, implement changes and verify delivery.
Three concepts to understand
Repository
A versioned project containing code, history and configuration.
Diff
The exact comparison between previous code and a proposed change.
MCP server
A standardized source of tools and context an agent can use.
How to get started
- Give it a verifiable task.
- Preserve repository instructions.
- Run tests and review the diff before publishing.
Quick answers
Is Codex only for new projects?
No. It can work in existing codebases with the right context and permissions.
Does it remove the need for review?
No. Important changes still need tests and review proportional to their risk.