Agent: Codex

Purpose

• code generation
• patch writing
• refactoring
• implementation support

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When to Use

• code creation
• existing code updates
• boilerplate cleanup
• test code draft

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Model

Item	Value
Provider	OpenAI
Default Model	gpt-4o
Role	code-focused generation
API	OpenAI API

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Configuration

{
  "agent": "codex",
  "model": "gpt-4o",
  "temperature": 0.2,
  "max_tokens": 2048,
  "system_prompt": "You are an expert software engineer. Output only code unless asked to explain."
}

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Setup

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Authentication

$env:OPENAI_API_KEY = "sk-..."

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Verify

echo $env:OPENAI_API_KEY

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MCP Notes

• MCP tool integration available
• better fit for implementation than long-form reasoning
• low temperature recommended for stable output

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Notes

• strong fit for code generation
• better fit for patches than long architecture narratives
• useful for review, refactor, and implementation support

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