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modul 2 — the toolbox in depth

codex next to claude code

Two agents, one project. What transfers as-is (AGENTS.md, skills, the whole discipline), what differs, and when a second agent actually earns its place.

~2 min read · ~8 min with the exercise · v1.1 · verified: 2026-07-15

the discipline is portable

You installed Codex back in module 0. Now that you have the full toolbox vocabulary (standing rules, skills, hooks, subagents, MCP), the real question comes into focus: how much of what you've learned is Claude Code knowledge, and how much is agent knowledge?

Almost all of it is agent knowledge, and the file names prove it. Codex reads AGENTS.md before doing any work. That is the same file this course taught you to write as the project constitution. Skills follow the same open standard with the same SKILL.md format and the same progressive disclosure. MCP is a shared protocol by design. Your PRD, your request anatomy, your verification loop: tool-agnostic, all of it.