In the past two years, more and more people have started to use Cursor, Kiro, Codex and other AI Coding IDEs to write code. They do significantly improve efficiency, but there is a very common problem:Many people download and install it and start using it straight away, with little or no basic configuration doneThe problem is that you can't get the code to work. At first, everything seems to be fine, but later there are problems such as garbled code, confusing formatting, Git diff explosion, PHP prompt conflicts, unstable files after AI code changes, etc. Often, the problem is that the editor environment itself is not configured. Often, the problem is not in the model, but in the editor environment itself.
It's this link, ignored by a large number of users, that this article wants to address:How exactly should the AI Coding IDE be configured to be more stable and efficient for real development.
Why AI Coding IDEs Can't Just Be Used Naked
Many users still understand AI IDE as “a chat box that can write code”. But in reality, these tools have been deeply involved in the project directory, file reading and writing, code modification, terminal execution, and even automatic repair processes. Take Codex as an example, OpenAI's documentation clearly states that it can work in the terminal as well as participate in code editing through IDE extensions, and Kiro also emphasizes that it is not just a chat tool, but an agentic IDE for production environments, i.e., if the underlying editor settings, coding rules, formatting behaviors, or language services aren't configured correctly, the AI will magnify the problem rather than automatically fixing it for you. That is, if the underlying editor settings, coding rules, formatting behaviors, or language services are not configured properly, the AI will magnify these small problems rather than eliminate them for you.
What's more, products like Kiro and Cursor are not standalone editors built from scratch; Kiro's official description is that it's built on Code OSS, and can continue to use VS Code's settings and compatible plugins; Cursor's official docs also provide a way to migrate settings, shortcuts, and extensions imported from VS Code. In other words, although these AI IDEs have different names, the underlying editor behavior and a lot of configuration logic are actually common.
That's why a seemingly common set of VS Code configurations actually applies equally to Kiro, Cursor, and can even affect your experience with the Codex IDE extension.
Why the default settings are burying a lot of holes
The first pitfall, the most typical, isfile encodingIf the project has old files, historical plug-ins, code migrated from other editors, or contains a lot of Chinese comments, headings, and translation strings, it is easy for AI to read and write Chinese files. If the project has old files, historical plug-ins, code migrated from other editors, or contains a large number of Chinese comments, headings, and translation strings, once the encoding recognition is inconsistent, the AI is easy to read and write the file to the Chinese into a messy code. vs code officially provides a files.encoding 和 files.autoGuessEncoding The purpose of these settings is to control the default encoding and auto-recognition behavior. For most development projects today, it is still safest to use UTF-8.
The second pitfall, theline breakThe default is CRLF for Windows, and LF for Linux and most server environments and open-source repositories; if you're developing locally on Windows and deploying on Linux, and you don't have standardized line breaks, it's easy for Git to show you that “the whole file was changed” when in reality you've probably just changed the end-of-line character. VS Code's official documentation and setup system itself supports the use of LF via the files.eol Specify the default line break style, which is a critical base setting in cross-platform projects.
The third pitfall, theAuto-formatting is not establishedAI writes code, but it doesn't always maintain a completely consistent style of indentation, spaces, brackets, and typography. Especially if you have the AI make multiple rounds of changes to the same file, the formatting can get messy. If you don't have automatic formatting at save time, your project will end up in a “running, but hard-to-maintain” state, and VS Code officially supports formatting, so triggering formatting at save time is a well-established workflow.
The fourth pitfall occurs mainly with PHP and WordPress users:Built-in PHP language features conflict with IntelephenseThe official Intelephense documentation clearly mentions that VS Code's built-in PHP Language Features tends to be overloaded with inaccurate completions, and that the best practice is to turn it off and let Intelephense take over as the main PHP smart tip. It even gives you the direct path to do this: search for @builtin phpClose PHP Language Featuresbut retained PHP Language Basics.
A set of AI IDE basics for most people
If you're currently using Kiro, Cursor, or VS Code and want to stabilize the most problematic areas first, the following configuration is useful enough. It is suitable for writing User Settings (JSON)The official VS Code documentation also makes it clear that User Settings apply globally to all VS Code instances you have open.
In the IDE interface, press Ctrl + Shift + P, type settings.json, and select Preferences: Open User Settings (JSON).
{
"files.encoding": "utf8",
"files.autoGuessEncoding": true,
"files.eol": "\n",
"files.trimTrailingWhitespace": true,
"editor.formatOnSave": true,
"editor.insertSpaces": true,
"php.validate.enable": false,
"php.suggest.basic": false
}The setup isn't complicated, but each item is practical.
files.encoding 和 files.autoGuessEncoding Used to minimize the risk of garbling, to make the editor work in UTF-8 by default, and to perform auto-recognition of old files.files.eol Harmonize the default use of LF line breaks for new files, to more closely match the conventions of Linux servers and most modern repositories.files.trimTrailingWhitespace You can clean up extra spaces at the end of each line and reduce the amount of meaningless noise in Git.editor.formatOnSave Let the code formatting be automatically organized every time you save, to avoid the code written by the AI getting more and more messy.editor.insertSpaces The last two PHP settings are designed to avoid duplicating or conflicting with the built-in PHP functions when using Intelephense. The last two PHP settings are designed to avoid duplicating or conflicting with built-in PHP functionality when using Intelephense.
files.eol 和 editor.formatOnSave What's the point?
Many people will be a bit confused when they see these two settings for the first time, especially Windows users, and the biggest concern is: will it mess up the system or cause compatibility issues.
first of all files.eol. It controls theWhat line breaks are used by default for new documents. You set it to "\n"LF is not the same as forcing all the old files on your computer to be rewritten to LF, it's more of a “from now on” default rule that allows you to keep your new files as uniform as possible. For people who deploy code to Linux servers, Docker environments, or cloud hosts, it's often less of a hassle to use LF than to continue with Windows-style CRLFs.
what's more editor.formatOnSave. This setting works:Each time you save a file, the editor automatically calls the corresponding formatter to tidy up the code. It doesn't create logic out of thin air, and it doesn't automatically “fix your business”, but it does standardize indentation, parentheses, spaces, line breaks, and typography, so that the results of repeated changes by you and the AI can be returned to a maintainable state as quickly as possible. VS Code has a full-fledged formatting mechanism, which is not a hack, but rather a very basic and useful feature of modern editors.
For AI programming, these two settings are especially significant. This is because AI output is high-frequency, batch, and continuously iterative. A little bit of formatting difference may not be noticeable in ordinary handwritten code, but it will quickly pile up as a maintenance burden in the scenario of continuous modification by AI.
Are there any problems with this configuration on Windows 11?
One can go straight to the conclusion:No questions.
You can absolutely use the above setup on Windows 11, in particular the files.eol: "\n" 和 editor.formatOnSave: true These two items do not affect the system itself, nor do they disrupt the normal use of Kiro, Cursor or VS Code. They only change the default behavior at the editor level, not the Windows system settings, and VS Code's official settings system is intended for this kind of user-level and workspace-level customization.
What you really need to pay attention to is not whether you can or cannot use it, but whether the project has an established specification for it. If your team repository explicitly requires the use of CRLFs, or if a rare old script must rely on Windows-style line breaks, then the project rules should prevail. But for the vast majority of Web, PHP, Node, Python, WordPress, Docker, and Linux deployment-related projects, standardizing on UTF-8, LF, and auto-formatting on save is usually a safer direction.
Recommended: Windows open UTF-8 global support (very important)
Path: Control Panel → Area → Administration → Change system area settings
Check: ☑ Beta: Use Unicode UTF-8 for worldwide language support
after that restart the computer.
If you're a WordPress / PHP developer, what else to look for in addition?
If you're doing WordPress, WooCommerce, or other PHP projects, this type of configuration takes on another level of importance.
First, WordPress projects often contain a lot of mixed content in English and Chinese. Themes, plug-ins, custom functions, translation strings, JSON configuration, template files, these contents are very sensitive to coding. Once the AI modifications to the coding messed up, the back of the problem may be more than one place. Secondly, if the language service of PHP is not straightened out, the experience will be significantly worse. Intelephense officially recommends turning off the built-in PHP Language Features and letting it work as the main language service; this has a big impact on the experience of completions, jumps, and diagnostics when writing WordPress plugins, themes, and custom logic.
So, if you're working in a similar scenario as you are now - writing WordPress / PHP projects on Windows 11 with Kiro or Cursor - there are at least three things that should be done: standardize UTF-8, standardize LF, add Intelephense and turn off the built-in PHP Language Features. LF, add Intelephense, and turn off the built-in PHP Language Features, not to be geeky, but to minimize the time spent on fixing garbage, formatting, and hint conflicts later on.
It's not enough to just do a global setup, project-level rules need to follow suit
A lot of people do User Settings and think that's pretty much it, but if you really want the program to be stable in the long run, theBetter yet, add .editorconfig.
What EditorConfig does is write a portion of the code style and documentation rules into the project so that different editors, different developers, and different AI IDEs all try to work to the same set of specifications. Microsoft's documentation on EditorConfig also emphasizes that it is suitable for use to standardize coding styles within a team or codebase.
An example that works for most Web / PHP projects would be to create a new file .editorconfig in the root directory of the project that would look like this:
root = true[*]
charset = utf-8
end_of_line = lf
insert_final_newline = true
indent_style = space
indent_size = 4
trim_trailing_whitespace = trueWith this layer of rules, even if you later switch from Kiro to Cursor, or to another compatible editor, as long as it supports EditorConfig, the underlying behavior will still be consistent. In this way, the difference between AI IDEs is mainly in the modeling and interaction, not in the fact that the style of the file is messed up by whoever changed it once.
It's not just the model that really affects AI coding efficiency
Nowadays, people love to compare which model is stronger and which IDE is smarter, but in real development, theIt is often not the model that determines the lower limit of the experience, but whether the environment is stable or notThe model is strong. No matter how strong the model is, if the project has messy coding, line breaks, formatting that isn't turned on, or conflicting language services, it's still going to write the problem into the file. On the other hand, even if you're not using the most expensive model, as long as the editor and project rules are stable, it's easier for the AI to consistently produce maintainable code.
This is why many people feel that AI programming is “amazing in the beginning, but chaotic in the end”. It's not because AI is suddenly not working, it's because they've never organized their development environments as if they were production tools.
concluding remarks
Cursor, Kiro, Codex and other AI Coding IDEs can of course be downloaded and installed for immediate use, but “working” and “suitable for long-term development” are two different things. A truly stable, efficient, and sustainable way to use an IDE cannot be separated from the most basic editor configurations: unified encoding, unified line breaks, automatic formatting on save, rationalized language services, and project-level .editorconfig Rules.
Get that infrastructure in place first so that the AI behind it is more like writing code for you than creating new maintenance costs for you.