Every couple of months a new AI tool drops and you start from zero โ Cursor, then Claude Code, then Codex, now Hermes. It doesn't have to be that way. The thing worth building isn't a Claude or Codex thing; it works in every tool that exists.
- Two layers. You RENT the engine (Claude Code, Codex, Hermes, Gemini CLI โ always changing) and you OWN the folder (your files, rules, skills, connections). Every hour you put into Claude Code went into the folder, not the engine.
- Why it's portable. Tools read a rules file on start (CLAUDE.md / AGENTS.md, one line points one at the other), skills are an open standard (same file everywhere), and apps connect via MCP โ the shared plug Anthropic, OpenAI, and Google all adopted.
- The proof. Same one-line prompt, same folder, run in Claude (Opus 4.8) and Codex (GPT 5.5). Both built the same client report โ same structure, same red "5 cancellations" warning I never asked for โ because that warning lives in one line of my AGENTS.md. ~30 seconds each; an hour by hand.
- Four habits that don't expire. Ask for outcomes, not steps. Keep the truth in files (chat history isn't memory). Correct things in the rules file, not in the moment. The first time you repeat a prompt, turn it into a plain-English skill.
- The filter for new tools. Every release has two prices: "the what" (a minute) and "the how" (a weekend). One question before you pay the weekend โ does it solve a problem I have today? If not, save the link and keep building.
My take: stop being a "Claude person" or a "Codex person." You own the folder. The folder is the car; the engine is rented. Swap it when something better ships and keep driving.
๐ Full tool-proof guide PDF pinned below โ the two layers, the side-by-side proof, the four habits, and a starter-folder checklist.
We build setups exactly like this inside The AI Accelerator (free, 19k+ members).
๐ Which tool have you been feeling guilty about not learning? Run it through the one question and tell me if it survives.
[Watch the video here โถ๏ธ]