Gitignore
A file that tells Git to ignore certain files or folders, so they don't get saved in your project history.
A .gitignore file is a simple text file that tells the Git version control system which files or folders it should not track. When you are working on a software project, you often have temporary files, generated files, or sensitive information that you don't want to include in your project's history.
For example, if you are training a large AI model, you might generate large output files or logs. You can list these files or folders in your .gitignore file. Git will then skip them, keeping your project history clean and focused on the essential code and configuration.
This helps keep your project organized and prevents accidental commits of unnecessary or private data.
A .gitignore file is a plain text file that lists file patterns and directory names that the Git version control system should intentionally ignore. When Git encounters these patterns, it will not track changes to matching files or directories, nor will it stage them for commit. This is crucial for managing large datasets, build artifacts, environment-specific configurations, and sensitive credentials that should not be part of the shared codebase.
Patterns in .gitignore can include wildcards and directory traversals. For instance, `*.log` ignores all files ending in .log, and `build/` ignores the entire build directory. Properly configured .gitignore files prevent accidental commits of large, unnecessary, or sensitive data, streamlining collaboration and reducing repository bloat.
Recent updates to Meta AI's Llama Cookbook highlight the practical use of .gitignore for managing AI project outputs. As frontier AI labs develop increasingly complex models, they generate vast amounts of data, logs, and intermediate files. Using .gitignore becomes essential for keeping these projects organized and efficient.
- Llama Cookbook: Adding gitignore for results and output foldersMeta · Llama Cookbook ·
- Llama Cookbook: Adding gitignore for results and output foldersMeta · Llama Cookbook ·
- Meta Meta AI
- Meta AI's Llama Cookbook uses .gitignore to manage project outputs, ensuring that generated files and folders are not tracked in the version control system.
- Configuration File
- A .gitignore file is a specific type of configuration file f
- README File
- A README file provides information about a project, while a .gitign
- License File
- A license file specifies the terms under which a project can be us
The .gitignore file was introduced as a feature of the Git distributed version control system, developed by Linus Torvalds and others. Its purpose is to allow users to specify files that Git should not track. Source ↗
Create a new folder on your computer. Inside it, create a file named `.gitignore`. Open this file in a text editor and add the line `*.tmp`. Now, create a few empty files, some ending in `.tmp` and some not. Initialize a Git repository in the folder and check the status. You will see that Git only lists the files that do not end in `.tmp`.
The Playbook: reusable how-tos, prompts, configs and tips pulled out of the news.
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- TemplateTemplate for building an AI tool tailored to your workA structured approach to defining and building a custom AI tool for specific business needs. · 15 min
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- HeuristicDouble coding agent task completion with docs linksProviding coding agents with a documentation link significantly increases their task completion rate. · 2 min
Questions people ask
- What happens if I add a file to .gitignore after it's already being tracked by Git?
- If a file is already tracked by Git, adding it to .gitignore will not stop Git from tracking it. You need to manually remove the file from Git's tracking first using `git rm --cached <file>` and then commit the change.
- Can I have multiple .gitignore files in a project?
- Yes, you can have multiple .gitignore files in different directories within your project. Git applies rules from .gitignore files in parent directories as well as the current directory.
First seen on Subvolts Oct 7, 2025. Updated Sep 15, 2026. Written by an AI model from the items above and reviewed against them weekly; report an error.