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Naturally, these sort of contributions are more feasible for Items hosted in a public location that supports version control, namely:

• GitLab
• GitHub
• Wiki Sites

Per

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Item Contribution Guidelines

Nevertheless, you should always check for contribution guidelines of the Item in question. For Items hosted on GitHub/GitLab, this information is typically part of the README.md  or CONTRIBUTING.md files (see for example the guidelines for EWC Items)

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