How to migrate from Cursor to Codex

aix is a CLI for defining, installing, and syncing AI editor configuration. If you are moving from Cursor to Codex, this guide shows what aix can carry over, what the destination editor calls each feature, and where the destination config lands.

When you are ready to run the move, aix sync cursor --to codex copies the supported config from Cursor into Codex. Use the comparison below first so you know which names, paths, and support differences to expect.

If you want the aix-side definitions first, review rules , prompts , mcp , skills , hooks .

Run this migration

Preview the user-scope migration before writing files:
```
aix sync cursor --to codex --dry-run
```
Read the preview for skipped or converted features, then run:
```
aix sync cursor --to codex
```
Open Codex's generated files and compare them with the destination details below. Use --scope project when the source config is project-scoped.

What needs attention

Rules: Cursor calls this "Rules", while Codex calls it "AGENTS.md".
Prompts: Codex loses part of the prompts surface that Cursor has today.
MCP: Cursor and Codex put mcp in different project or user targets.
Skills: Cursor and Codex put skills in different project or user targets.

How to use this guide

Read across a row to compare the source and destination terms, support, and targets.
Each scope line shows both what the editor supports and what aix writes today.
Open the destination editor page at the end if you need every path, note, and terminology detail.

The biggest changes are in rules, prompts, mcp.

Editor support

Supported The editor exposes that feature at that scope.
No support The editor does not expose that feature at that scope.

aix support

Native aix writes the editor's own format.
Adapter aix keeps the feature through an adapter or alternate representation.
No support aix does not write that feature for the destination today.

Use the Project scope and User scope rows to see where config lands at each level.

Feature comparison

Feature-by-feature differences from Cursor to Codex.
Feature	Cursor	Codex
Rules	Rules Project Editor Supported aix Native Path `.cursor/rules/.mdc` User Editor Supported aix No support Editor target `Settings UI` Editor:* Cursor stores user rules in the Settings UI rather than a writable file. aix: aix does not currently write Cursor user rules.	AGENTS.md Project Editor Supported aix Native Path `AGENTS.md at the project root and selected subdirectories` User Editor Supported aix Native Path `~/.codex/AGENTS.md`
Prompts	Commands Project Editor Supported aix Native Path `.cursor/commands/.md` User Editor Supported aix Native Path `~/.cursor/commands/.md`	Skills Project Editor Supported aix Adapter Path `.agents/skills/prompt-{name}/` aix: Prompts are installed as instruction-only Agent Skills. User Editor Supported aix Adapter Path `~/.codex/skills/prompt-{name}/` aix: User-scoped prompts are also converted to skills.
MCP	MCP servers Project Editor Supported aix Native Path `.cursor/mcp.json` User Editor Supported aix Native Path `~/.cursor/mcp.json`	MCP servers Project Editor No support aix No support Editor: The editor does not expose this feature at this scope. aix: aix does not yet write Codex project MCP config. User Editor Supported aix Native Path `~/.codex/config.toml`
Skills	Skills Project Editor Supported aix Native Path `.cursor/skills/{name}/` User Editor Supported aix Native Path `~/.cursor/skills/{name}/`	Skills Project Editor Supported aix Native Path `.agents/skills/{name}/` User Editor Supported aix Native Path `~/.codex/skills/{name}/`
Agents	Agents Project Editor Supported aix Native Path `.cursor/agents/.md` User Editor Supported aix Native Path `~/.cursor/agents/.md`	Agents Project Editor No support aix No support Editor: The editor does not expose this feature at this scope. aix: aix reports configured agents as unsupported for Codex. User Editor No support aix No support Editor: The editor does not expose this feature at this scope. aix: aix reports configured agents as unsupported for Codex.
Hooks	Hooks Project Editor Supported aix Native Path `.cursor/hooks.json` User Editor Supported aix Native Path `~/.cursor/hooks.json`	Hooks Project Editor Supported aix Native Path `.codex/hooks.json` User Editor Supported aix Native Path `~/.codex/hooks.json`