Go from not knowing how to ask to getting Codex to complete a small, verifiable development task.
A beginner-friendly course for people who are new to Codex. You will learn what Codex is, when to use it, which entry point to choose, how to write clear tasks, how to ask Codex to understand code, make small changes, verify results, and stay within safe boundaries.
Explain what Codex is and distinguish it from regular chat AI, code completion, and a traditional IDE.
One explanation under 80 words, plus two lists: "can help with" and "cannot take responsibility for".
Judge whether a task is suitable for Codex based on clarity, code scope, verification method, and risk level.
A judgment table for 5 task scenarios, including suitability, reason, and whether Codex may directly modify files.
Choose between Codex App, IDE, CLI, Web, or Cloud based on the task scenario.
An entry-point selection table with scenario, recommended entry point, reason, and caution notes.
Rewrite a vague development request into a Codex task instruction with a goal, context, scope, and verification method.
One rewritten Codex task instruction, plus labels for the added goal, context, scope, and verification details.
Write an instruction that asks Codex to read, explain, and plan before modifying code.
One Codex instruction for understanding and planning first, plus a list of what you expect Codex to return.
Turn a small feature, bug fix, or copy adjustment into a controlled and verifiable Codex change task.
A small change task brief containing the goal, allowed scope, forbidden scope, verification method, and completion standard.
Choose tests, lint, typecheck, runtime checks, or manual acceptance based on the type of Codex task.
A table matching task types to verification methods, plus a reporting template for verification that cannot run.
Use Codex for test generation, boundary checks, and diff review instead of only code generation.
One test-generation or diff-review task instruction, plus 3-5 quality standards.
Recognize permission, sandbox, network, deletion, dependency installation, and sensitive-data risks in Codex operations.
A risk-level table for 6 operations, plus safer instructions for the medium- and high-risk items.
Turn the course skills of understanding, task expression, modification, verification, review, and safety into a one-week practice plan.
A 7-day practice plan table with daily task, trained skill, submitted output, and verification method.
