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Codex Professional: The CLI Surface

Three CLI lessons (CP-012 to CP-014), each walking the real Codex command surface screen by screen — version, doctor, login, exec, review, resume, apply, sandbox policy, feature flags, plugins, MCP, and Cloud.

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The course · 3 dedicated lessons

Every lesson is its own guided page.

Each card opens a full lesson with Codex and Claude screen references, numbered on-screen hints, step-by-step instructions, hands-on tasks, resources, and a checkpoint.

01
Lesson 01 · CLI - 12 min

Codex CLI: Setup, Login, Resume, Exec, Review, and Apply

Walk the terminal-native Codex surface end to end: confirm the build you are running, verify sign-in, read the full command map, and be able to say in one sentence what exec, resume, review and apply each do — so the first time you run them on real work, nothing surprises you.

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02
Lesson 02 · CLI - 10 min

Codex CLI: Config, Permissions, Sandbox, and Features

Set the blast radius before you run: choose a sandbox policy, inspect feature flags, and understand how config controls what the agent may do.

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03
Lesson 03 · CLI - 11 min

Codex CLI: Plugins, MCP, Cloud, and the SDK Boundary

Extend Codex safely: manage plugins, connect external MCP servers, browse Cloud tasks, and understand where Codex becomes an MCP server itself.

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Learner outcomes

What you can do by the end.

  • Drive the Codex CLI workflow: confirm the build, sign in, run, resume, review, and apply.
  • Set the agent's blast radius first with the right sandbox policy before approvals.
  • Extend Codex through plugins, MCP servers, and Cloud — treating each connection as a trust decision.
  • Read real command output and explain a broken local setup with codex doctor.

Source notes · checked 2026-06-10

Official references used to build these lessons.