Due to the complexity of searching code, there are a few restrictions on how searches are performed:

<ul>

<li>Only the _default branch_ is considered. In most cases, this will be the `master` branch.</li>

<li>Only files smaller than 200 KB are searchable.</li>

<li class='not-enterprise'> You must always include at least one search term when searching source code. For example, searching for <a href="https://github.com/search?utf8=✓&q=language%3Ago&type=Code"><code>language:go</code></a> is not valid, while <a href="https://github.com/search?utf8=✓&q=amazing+language%3Ago&type=Code"><code>amazing language:go</code></a> is.</li>

</ul>

Finds issues or pull requests created by a certain user.

Finds issues or pull requests that are assigned to a certain user.

Finds issues or pull requests that mention a certain user.

Finds issues or pull requests that a certain user commented on.

Finds issues or pull requests that were either created by a certain user, assigned to that

* [`team`](https://help.github.com/articles/searching-issues/#search-by-a-team-thats-mentioned-within-an-issue-or-pull-request)

For organizations you're a member of, finds issues or pull requests that @mention a team within the organization.

Filter issues or pull requests based on whether they're open or closed.

Filters issues or pull requests based on their labels.

Searches for issues or pull requests within repositories that match a certain language.

Filters issues or pull requests based on date of creation, or when they were last updated.

Filters issues or pull requests based on the date when they were closed.

Filters issues or pull requests based on the quantity of comments.