Codex Tutorial - A hands-on guide to VibeCoding full-stack development for beginners

Codex has been very active recently, and its direction is clear. Codex is no longer just about "helping programmers write code," it's about opening up new avenues for growth.AI We are pushing Codex to become a platform capable of long-term operation, integrating with enterprise processes, and serving in security scenarios. Agent platform.

OpenAI This wave is meant to giveClaude Code loosened the soil.

Let's take a look at Codex first.Claude The differences between Codex and OpenClaw, and who is more suitable for Codex.

As a complete beginner with zero coding experience, I've used all of these products, and I personally feel that Codex would be more suitable for me.

Enter ChatGPT On the homepage, there is a Codex option in the left navigation bar.

ChatGPT Homepage: https://chatgpt.com/

Clicking on Codex takes you to the download page, which currently offers three usage methods: CLI, App, and IDE. I used the App method. The download was quick; it finished in about two minutes.

After downloading, just like installing any other software, drag the icon to Applications and follow the prompts step by step. Once installed, click the icon. On your first login, you will be prompted to choose a login method.

Subscribed to ChatGPT Plus/Pro members, select "Use Chat"GPT"Continue." You'll be redirected to a webpage for authorization; simply enter your login account. The whole process is quick, taking about 10 seconds. After logging in, Codex uses the subscription package's...GPT-5.5 credit limit, no additional fees required.

For those who haven't subscribed, you can generate an API Key at platform.openai.com, then paste it into the app and pay by token. However, [the text abruptly ends here, likely due to an incomplete translation or source material.]recommendThis method, if overused, can be costly. It's recommended to try the first method first to get a feel for Codex's resource consumption before making any further decisions.

What makes Codex truly remarkable is its pre-installed suite of skills and plugins.

This is a summary of Codex's core plugins and skills.

Now that we've learned enough about Codex, let's get straight to the practical testing.

This time, I'm going to use Codex to create a KOL order placement platform for media distribution.

This case is large enough and closely resembles real-world business. It can...Simultaneously, the following capabilities were verified: Codex product understanding, front-end generation, business process structuring, transaction chain design, browser use self-testing, and cloud server deployment..

The real challenge in this case isn't whether the page looks good, but whether the page can help me determine: what kind of influencer is suitable? AI What are the reasons for recommending a product as suitable, where is the evidence for the content, is the price confirmed, what are the performance risks, and can the customer directly select a package, fill out a brief, and submit an order?

Just putPrompt wordsI handed it over to Codex, and the page generated by Codex was generally in the right direction.

The front-end was done, but it looked terrible, so I asked Codex to redesign it, referencing Apple's official website. The result was much better.

After completing the backend, purchase a cloud server for deployment. Even if you're a coding novice, don't worry; just let Codex guide you step-by-step.

Following Codex's instructions, I ran it step by step in the terminal.

If you encounter an error, simply copy the code and show it to Codex. Based on the feedback, proceed to the next step. It's not difficult; it just requires patience and taking it one step at a time.

This configuration is sufficient for purchasing cloud services.

Next is installing Docker on the server and uploading the project to the cloud server.

Codex is also availableautomaticThey identified potential safety hazards and helped us make repairs.

Then my media placement website, called KOL UP, went live.

The development process for this project is as follows, the entire processautomaticThe level of automation is very high. I only need to describe the requirements, then Codex does the work, and I come back to check if it has been implemented.

If I were to rate it, I would give Codex 95 points, deducting 5 points for its response speed.

Codex is sufficient for most tasks in full-stack development scenarios, but it is more than just a development tool. Next, we will introduce Codex's 10 core features. This upgrade is both powerful and user-friendly.

Local file operations

The premise that Codex is truly useful is that it can work directly into your project files.

It can view directories, modify files, check configurations, repair pages, adjust styles, and perform local file operations. This is also the dividing line between Codex's transformation from a "question and answer tool" to a "work tool".

Context Management

A project is not built on a single sentence.Prompt wordsCompleted. So Codex does this when your context is too long, don't ask me how I know.

While Codex can help you compress old conversations, compression is time-consuming, and the compressed context may not retain the details you truly care about.

When using Codex, always break tasks down into short sessions. Each session should only do one thing: planning, implementation, and bug fixing. Avoid doing everything in one session: designing the page, modifying the front-end, modifying the back-end, deploying, fixing bugs, and then modifying the visuals. This is the easiest way to overwhelm the context..

You can also get Codex to help you at critical points.Write a project handover document.

Prompt wordsPlease compile the current project status, completed content, key documents, next steps, and precautions into docs/CODEX_HANDOFF.md. This content should be readily available for the next Codex session.

After that, each time a new conversation starts, just say:

Prompt wordsPlease read docs/CODEX_HANDOFF.md first, and then continue to the next step.

Command line tool usage

Many non-programmers get stuck because they don't know how to install the environment, run commands, or handle errors.

For example, installing software, configuring CLI, installing MCP, installing Skill, running projects, uninstalling dependencies, and checking versions are common tasks for programmers, but they can be discouraging for liberal arts students.

Codex can now handle command-line operations for you, which is like helping you overcome the most daunting hurdle in the technical skill barrier, and it's also very...SimpleYou can simply state your requirements in the dialog box.

Browser preview and annotation features

This feature is especially user-friendly for non-programmers. Because you don't need to look at the code to judge the results, you only need to see the page appearance. After writing your webpage with Codex, you can directly preview it in your browser to see if buttons are misaligned, if the page looks good, and if there are any interaction issues.

It also allows for targeted modifications through the annotation function.

Process sedimentation into Skills

It would be very wasteful to reiterate the requirements every time we work in our daily workflow. Transforming processes into skills is like turning your aesthetic sense, templates, experience, and standards into reusable assets.

Of course, you can directly install someone else's Skills.

Persistent memory

Persistent memory addresses the issue of "not having to explain things from scratch every time." Global memory is more like your long-term preferences, such as your preferred writing style, cover design, coding style, and frequently used tools. You can configure this in Settings > Personalization.

Experiment memory can also be found in [Settings] - [Personalization].

Parallel task processing

This capability is crucial. For example, you can have Codex do three things simultaneously: fix webpage bugs, optimize the page visuals, and compile a README. This will significantly increase efficiency.

For beginners, starting with too much parallelism can be overwhelming. For advanced users, parallel tasks are extremely useful, allowing Codex to function like a small team, working in multiple directions simultaneously.

Model selection and quota query

You need to know when to use a strong model and when to use a lightweight model.

SimpleSimple tasks, such as revising text, adjusting buttons, or interpreting documents, can be handled with inexpensive or lightweight models. Complex tasks, such as refactoring projects, fixing deep-seated bugs, or creating complete web pages, require more robust models. The value of this capability lies in helping you save on expenses and increase your success rate.

In addition, you can see the usage ratio of the context here, which makes it very reassuring to use.

You can also see the entire membership credit usage. To be fair, Codex is quite generous with the credit limit.

Image generation

Image generation directly utilizes Image2's capabilities, which is very...powerfulCodex is more focused on project implementation, while image generation is more focused on content packaging.

You can combine them together: Codex for creating web pages, tools, and interactive pages, and image generators for creating covers, illustrations, and visual materials.

Plugin

A plugin's value depends on the maturity of its ecosystem and your specific needs. If a plugin can help you integrate with GitHub, databases, browsers, design tools, etc., then it's valuable.automaticIf it's a tool, then it's very valuable.

However, more plugins aren't necessarily better. For non-programmers, too many plugins can actually be distracting..

What you really need to focus on is whether this plugin can help you complete a specific process, such as publishing a webpage, reading files, connecting to a media library, and generating a report.

After this test and experience, my feeling is that Codex is not necessarily better than others in terms of coding.Claude Code is impressive, but it's already quite resilient that it can meet this level of difficulty without banning accounts or imposing various restrictions.

Claude Code remains strong in complex code repositories, terminal development, refactoring, and engineering processes.

However, Codex's advantage lies in its integration of Browser Use, Computer Use, Image 2, Skills, and plugins into a single workflow. For example, when creating a front-end page, Codex allows users to not only write code but also view the page's appearance, modify the layout, and generate images, icons, and product display materials. For non-programmers, this experience of "seeing the results and being able to iterate" is more intuitive.

Codex is responsible for writing the code, while people are responsible for understanding the business logic. The real difference lies in the insight into actual needs and the breakdown of processes..

Original link:Codex's comprehensive tutorial is here, and it may become a top trend! (Understand it all in one article)