Then, I use this tool:
https://github.com/a1st-dev/aix
to keep my Claude, Codex, and OpenCode in sync with my config.
The major benefits are that my adoption/deletion of skills, rules, hooks, MCP servers, etc. are deliberate, versioned, and shareable.
And since aix allows you to create extensible configs, that aix-config public GitHub repo is my base set of rules, and my internal/employer-specific rules are just a small layer on top of that.
It also makes trying out different subscriptions easy: you define your config in one place (one source of truth), and write to Claude, Codex, Devin, etc. with one command.