The github/gitignore repository is GitHub's official collection of .gitignore file templates designed to help developers quickly set up proper file exclusion rules for their projects. The repository serves a critical infrastructure role: it directly populates the .gitignore template choosers available in the GitHub.com interface when users create new repositories and files, making it a foundational resource for millions of developers initializing projects across the platform.
The repository organizes templates into three distinct structural tiers to serve different use cases and adoption levels. Root-level templates contain the most commonly used patterns for popular programming languages and technologies, providing meaningful baseline rules that help developers avoid committing unimportant files into their repositories. The Global folder houses templates for various editors, tools, and operating systems that apply across different project contexts, with the recommendation that users either add these to their global Git configuration or merge them into project-specific templates for permanent use. The community folder contains specialized templates for less mainstream languages, tools, and projects that have demonstrated value but don't yet warrant root-level inclusion, allowing the collection to grow while maintaining curation standards.
The repository explicitly maintains versioning discipline for templates that change significantly between software versions. Root-level templates represent the current supported version without version numbers in filenames, ensuring users automatically receive the latest iteration. Previous versions are relocated to the community directory with embedded version numbers in their filenames, allowing maintainers to support older versions still in active use while guiding new users toward current standards. This approach balances forward momentum with backward compatibility.
Contributing to the repository follows structured guidelines that emphasize quality over comprehensiveness. Templates must define a meaningful set of rules specific to a particular programming language, framework, tool, or environment rather than serving as exhaustive lists of all files installed by specific software versions. The repository explicitly acknowledges that it cannot and does not aim to cover every tool that has ever existed, instead focusing on curating the most common and helpful templates. Specialized templates that don't meet mainstream criteria can be proposed for the community directory, organized under appropriate subdirectories that reflect their domain.
The contribution workflow is straightforward and web-friendly, allowing developers to fork the repository, create branches for their changes, and submit pull requests to the main branch. The repository accepts contributions under the CC0-1.0 license, placing templates in the public domain. Pull request descriptions should include details about template importance and visibility, with the understanding that templates may not be immediately accepted but could be promoted to root level later based on demonstrated community interest and adoption patterns.
