# New extension: File Search (grep)

**URL:** <https://forum.codecrafters.io/t/new-extension-file-search-grep/14078>\
**Category:** Announcements\
**Tags:** challenge:grep\
**Created:** [July 28, 2025, 3:53pm UTC](https://forum.codecrafters.io/t/new-extension-file-search-grep/14078 "2025-07-28T15:53:00Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![andy1li](https://yyz1.discourse-cdn.com/flex003/user_avatar/forum.codecrafters.io/andy1li/32/10_2.png) [@andy1li](https://forum.codecrafters.io/u/andy1li)\
**Post date:** [July 28, 2025, 3:53pm UTC](https://forum.codecrafters.io/t/new-extension-file-search-grep/14078/1 "2025-07-28T15:53:00Z")

</div>

The next extension for the grep challenge is now live: **File Search**.

This is what grep is designed for: scanning input files and printing lines that match a given pattern.

 ![image](https://canada1.discourse-cdn.com/flex003/uploads/codecrafters/original/2X/d/d306dbe1768d5fe70e9a58d2b0a17b447b8c54f3.jpeg)

By the end of this extension, your grep implementation will be able to search through both individual files and entire directories.

Here’s the stage breakdown:

 ![image](https://canada1.discourse-cdn.com/flex003/uploads/codecrafters/original/2X/c/cd1bd3408228062cd540b11547ad9b7419958704.png)

Please [give this a try](https://app.codecrafters.io/courses/grep/overview) and let us know how it can be improved! @ryan-gang (author of this extension) and I will be available here to help out with any tester or instruction-related issues.