
Write Coding Standards From File
OfficialFreeGenerate coding standards from existing project files.
Free · Opens the source repo
What Write Coding Standards From File does
The Write Coding Standards From File skill allows developers to create a comprehensive coding standards document based on the existing syntax and styles present in specified files or folders. By analyzing the provided code files, this skill aggregates coding practices such as indentation, variable naming conventions, commenting styles, and more, ensuring that the generated standards reflect the actual coding practices used in the project. This is particularly useful for teams looking to establish a unified coding style or for new projects that need to adhere to existing code conventions.
When using the skill, you can specify a single file or a folder containing multiple files. If a folder is provided, the skill will loop through each file, collecting relevant data to create a cohesive set of coding standards. The output can be directed to a new file or inserted into an existing README.md file, depending on your configuration preferences. This flexibility allows teams to integrate coding standards seamlessly into their documentation workflows.
The skill also includes various configuration options, such as the ability to find and fix inconsistencies in coding styles across the analyzed files. You can customize the output format using predefined templates or specify your own. This ensures that the generated standards not only meet the project's needs but also align with the team's preferences for documentation style.
Overall, this skill is ideal for developers and teams who want to formalize their coding practices and ensure code quality through consistent standards. By leveraging existing code, it minimizes the effort required to establish guidelines, making it a practical addition to any development toolkit.
When to use it
Use this skill when you need to generate coding standards for a project based on the existing codebase, especially when multiple files are involved.
When not to use it
This skill may not be suitable for projects without existing code or for teams that prefer to define standards from scratch without reference to existing files.
What you can build with it
Establishing Team Coding Standards
A development team wants to create a coding standards document based on their existing codebase to ensure all members follow the same guidelines.
Integrating Standards into Documentation
A project manager needs to add coding standards to the project's README.md file to provide clear guidelines for new contributors.
Automating Code Quality Checks
A developer wants to automate the process of generating coding standards and fixing inconsistencies in their code to maintain high code quality.
How to install Write Coding Standards From File
View source1. Install with the skills CLI
npx skills add github/awesome-copilot/write-coding-standards-from-file --agent claude-code2. Or install it manually
Download the skill folder and drop it into ~/.claude/skills/ for all projects, or .claude/skills/ to scope it to one repo. Restart Claude Code so it picks up the new skill.
Anthropic's agentic coding CLI, and the reference implementation of Agent Skills. Drop a skill folder into ~/.claude/skills and Claude Code loads it automatically whenever a task matches the skill's description. Claude Code docs
Inside SKILL.md
Written by githubWrite Coding Standards From File
Use the existing syntax of the file(s) to establish the standards and style guides for the project. If more than one file or a folder is passed, loop through each file or files in the folder, appending the file's data to temporary memory or a file, then when complete use temporary data as a single instance; as if it were the file name to base the standards and style guideline on.
Rules and Configuration
Below is a set of quasi-configuration boolean and string[] variables. Conditions for handling true, or other values for each variable are under the level two heading ## Variable and Parameter Configuration Conditions.
Parameters for the prompt have a text definition. There is one required parameter ${fileName}, and several optional parameters ${folderName}, ${instructions}, and any [configVariableAsParameter].
Configuration Variables
- addStandardsTest = false;
- addToREADME = false;
- addToREADMEInsertions = ["atBegin", "middle", "beforeEnd", "bestFitUsingContext"];
- Default to beforeEnd.
- createNewFile = true;
- fetchStyleURL = true;
- findInconsistencies = true;
- fixInconsistencies = true;
- newFileName = ["CONTRIBUTING.md", "STYLE.md", "CODE_OF_CONDUCT.md", "CODING_STANDARDS.md", "DEVELOPING.md", "CONTRIBUTION_GUIDE.md", "GUIDELINES.md", "PROJECT_STANDARDS.md", "BEST_PRACTICES.md", "HACKING.md"];
- For each file in
${newFileName}, if file does not exist, use that file name andbreak, else continue to next file name of${newFileName}.
- For each file in
- outputSpecToPrompt = false;
- useTemplate = "verbose"; // or "v"
- Possible values are
[["v", "verbose"], ["m", "minimal"], ["b", "best fit"], ["custom"]]. - Selects one of the two example templates at the bottom of prompt file under the level two heading
## Coding Standards Templates, or use another composition that is a better fit. - If custom, then apply per request.
- Possible values are
Configuration Variables as Prompt Parameters
If any of the variable names are passed to prompt as-is, or as a similar but clearly related text value, then override the default variable value with the value passed to prompt.
Prompt Parameters
- fileName = The name of the file that will be analyzed in terms of: indentation, variable naming, commenting, conditional procedures, functional procedures, and other syntax related data for the coding language of the file.
- folderName = The name of the folder that will be used to extract data from multiple files into one aggregated dataset that will be analyzed in terms of: indentation, variable naming, commenting, conditional procedures, functional procedures, and other syntax related data for the coding language of the files.
- instructions = Additional instructions, rules, and procedures that will be provided for unique cases.
- [configVariableAsParameter] = If passed will override the default state of the configuration variable. Example:
- useTemplate = If passed will override the configuration
${useTemplate}default. Values are[["v", "verbose"], ["m", "minimal"], ["b", "best fit"]].
- useTemplate = If passed will override the configuration
Required and Optional Parameters
- fileName - required
- folderName - optional
- instructions - optional
- [configVariableAsParameter] - optional
Variable and Parameter Configuration Conditions
${fileName}.length > 1 || ${folderName} != undefined
- If true, toggle
${fixInconsistencies}to false.
${addToREADME} == true
- Insert the coding standards into the
README.mdinstead of outputting to the prompt or creating a new file. - If true, toggle both
${createNewFile}and${outputSpecToPrompt}to false.
${addToREADMEInsertions} == "atBegin"
- If
${addToREADME}is true, then insert the coding standards data at the beginning of theREADME.mdfile after the title.
${addToREADMEInsertions} == "middle"
- If
${addToREADME}is true, then insert the coding standards data at the middle of theREADME.mdfile, changing the standards title heading to match that of theREADME.mdcomposition.
${addToREADMEInsertions} == "beforeEnd"
- If
${addToREADME}is true, then insert the coding standards data at the end of theREADME.mdfile, inserting a new line after the last character, then inserting the data on a new line.
${addToREADMEInsertions} == "bestFitUsingContext"
- If
${addToREADME}is true, then insert the coding standards data at the best fitting line of theREADME.mdfile in regards to the context of theREADME.mdcomposition and flow of data.
${addStandardsTest} == true
- Once the coding standards file is complete, write a test file to ensure the file or files passed to it adhere to the coding standards.
${createNewFile} == true
- Create a new file using the value, or one of the possible values, from
${newFileName}. - If true, toggle both
${outputSpecToPrompt}and${addToREADME}to false.
${fetchStyleURL} == true
- Additionally use the data fetched from the links nested under level three heading
### Fetch Linksas context for creating standards, specifications, and styling data for the new file, prompt, orREADME.md. - For each relevant item in
### Fetch Links, run#fetch ${item}.
${findInconsistencies} == true
- Evaluate syntax related to indentations, line-breaks, comments, conditional and function nesting, quotation wrappers i.e.
'or"for strings, etc., and categorize. - For each category, make a count, and if one item does not match the majority of the count, then commit to temporary memory.
- Depending on the status of
${fixInconsistencies}, either edit and fix the low count categories to match the majority, or output to prompt inconsistencies stored in temporary memory.
${fixInconsistencies} == true
- Edit and fix the low count categories of syntax data to match the majority of corresponding syntax data using inconsistencies stored in temporary memory.
typeof ${newFileName} == "string"
- If specifically defined as a
string, create a new file using the value from${newFileName}.
typeof ${newFileName} != "string"
- If NOT specifically defined as a
string, but instead anobjector an array, create a new file using a value from${newFileName}by applying this rule:- For each file name in
${newFileName}, if file does not exist, use that file name andbreak, else continue to the next.
- For each file name in
${outputSpecToPrompt} == true
- Output the coding standards to the prompt instead of creating a file or adding to README.
- If true, toggle both
${createNewFile}and${addToREADME}to false.
${useTemplate} == "v" || ${useTemplate} == "verbose"
- Use data under the level three heading
### "v", "verbose"as guiding template when composing the data for coding standards.
${useTemplate} == "m" || ${useTemplate} == "minimal"
- Use data under the level three heading
### "m", "minimal"as guiding template when composing the data for coding standards.
${useTemplate} == "b" || ${useTemplate} == "best"
- Use either the data under the level three heading
### "v", "verbose"or### "m", "minimal", depending on the data extracted from${fileName}, and use the best fit as guiding template when composing the data for coding standards.
${useTemplate} == "custom" || ${useTemplate} == "<ANY_NAME>"
- Use the custom prompt, instructions, template, or other data passed as guiding template when composing the data for coding standards.
if ${fetchStyleURL} == true
Depending on the programming language, for each link in list below, run #fetch (URL), if programming language is ${fileName} == [<Language> Style Guide].
Fetch Links
- C Style Guide
- C# Style Guide
- C++ Style Guide
- Go Style Guide
- Java Style Guide
- AngularJS App Style Guide
- jQuery Style Guide
- JavaScript Style Guide
- JSON Style Guide
- Kotlin Style Guide
- Markdown Style Guide
- Perl Style Guide
- PHP Style Guide
- Python Style Guide
- Ruby Style Guide
- Rust Style Guide
- Swift Style Guide
- TypeScript Style Guide
- Visual Basic Style Guide
- Shell Script Style Guide
- Git Usage Style Guide
- PowerShell Style Guide
- CSS
- Sass Style Guide
- HTML Style Guide
- Linux kernel Style Guide
- Node.js Style Guide
- SQL Style Guide
- Angular Style Guide
- Vue Style Guide
- Django Style Guide
- SystemVerilog Style Guide
Coding Standards Templates
"m", "minimal"
```markdown
## 1. Introduction
* **Purpose:** Briefly explain why the coding standards are being established (e.g., to improve code quality, maintainability, and team collaboration).
* **Scope:** Define which languages, projects, or modules this specification applies to.
## 2. Naming Conventions
* **Variables:** `camelCase`
* **Functions/Methods:** `PascalCase` or `camelCase`.
* **Classes/Structs:** `PascalCase`.
* **Constants:** `UPPER_SNAKE_CASE`.
## 3. Formatting and Style
* **Indentation:** Use 4 spaces per indent (or tabs).
* **Line Length:** Limit lines to a maximum of 80 or 120 characters.
* **Braces:** Use the "K&R" style (opening brace on the same line) or the "Allman" style (opening brace on a new line).
* **Blank Lines:** Specify how many blank lines to use for separating logical blocks of code.
## 4. Commenting
* **Docstrings/Function Comments:** Describe the function's purpose, parameters, and return values.
* **Inline Comments:** Explain complex or non-obvious logic.
* **File Headers:** Specify what information should be included in a file header, such as author, date, and file description.
## 5. Error Handling
* **General:** How to handle and log errors.
* **Specifics:** Which exception types to use, and what information to include in error messages.
## 6. Best Practices and Anti-Patterns
* **General:** List common anti-patterns to avoid (e.g., global variables, magic numbers).
* **Language-specific:** Specific recommendations based on the project's programming language.
## 7. Examples
* Provide a small code example demonstrating the correct application of the rules.
* Provide a small code example of an incorrect implementation and how to fix it.
## 8. Contribution and Enforcement
* Explain how the standards are to be enforced (e.g., via code reviews).
* Provide a guide for contributing to the standards document itself.
```
"v", verbose"
```markdown
# Style Guide
This document defines the style and conventions used in this project.
All contributions should follow these rules unless otherwise noted.
## 1. General Code Style
- Favor clarity over brevity.
- Keep functions and methods small and focused.
- Avoid repeating logic; prefer shared helpers/utilities.
- Remove unused variables, imports, code paths, and files.
## 2. Naming Conventions
Use descriptive names. Avoid abbreviations unless well-known.
| Item | Convention | Example |
|-----------------|----------------------|--------------------|
| Variables | `lower_snake_case` | `buffer_size` |
| Functions | `lower_snake_case()` | `read_file()` |
| Constants | `UPPER_SNAKE_CASE` | `MAX_RETRIES` |
| Types/Structs | `PascalCase` | `FileHeader` |
| File Names | `lower_snake_case` | `file_reader.c` |
## 3. Formatting Rules
- Indentation: **4 spaces**
- Line length: **max 100 characters**
- Encoding: **UTF-8**, no BOM
- End files with a newline
### Braces (example in C, adjust for your language)
```c
if (condition) {
do_something();
} else {
do_something_else();
}
```
### Spacing
- One space after keywords: `if (x)`, not `if(x)`
- One blank line between top-level functions
## 4. Comments & Documentation
- Explain *why*, not *what*, unless intent is unclear.
- Keep comments up-to-date as code changes.
- Public functions should include a short description of purpose and parameters.
Recommended tags:
```text
TODO: follow-up work
FIXME: known incorrect behavior
NOTE: non-obvious design decision
```
## 5. Error Handling
- Handle error conditions explicitly.
- Avoid silent failures; either return errors or log them appropriately.
- Clean up resources (files, memory, handles) before returning on failure.
## 6. Commit & Review Practices
### Commits
- One logical change per commit.
- Write clear commit messages:
```text
Short summary (max ~50 chars)
Optional longer explanation of context and rationale.
```
### Reviews
- Keep pull requests reasonably small.
- Be respectful and constructive in review discussions.
- Address requested changes or explain if you disagree.
## 7. Tests
- Write tests for new functionality.
- Tests should be deterministic (no randomness without seeding).
- Prefer readable test cases over complex test abstraction.
## 8. Changes to This Guide
Style evolves.
Propose improvements by opening an issue or sending a patch updating this document.
```
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