> For the complete documentation index, see [llms.txt](https://docs.aviator.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aviator.co/mergequeue/how-to-guides/how-to-block-pull-request-mergeing-with-slash-commands.md).

# How to Block Pull Request Mergeing with Slash Commands

Learn how to block a pull request from merging until certain conditions are met using GitHub slash commands.

Aviator supports conditionally blocking a pull request from being automatically merged in the queue using the `/aviator block until` command. When the pull request reaches the top of the queue, its specified "block until" condition is evaluated. If the condition is met, the PR is merged immediately. If not, the PR is marked as pending. Aviator then continuously checks pending PRs every minute and merges them as soon as their conditions are satisfied.

## Block Until PR

`/aviator block until <some other PR number>` will block a pull request from being merged until the reference PR has been merged.

<figure><img src="https://273246003-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOAPqUQVbLbsfI5YESl32%2Fuploads%2Fsk3fwXvhkrFyV3jhDJPG%2F4C014C9F-27DC-4B71-98EF-70BE2719F64C.jpeg?alt=media&amp;token=0c4bd58e-a820-49a8-b1ad-021437ce6183" alt=""><figcaption></figcaption></figure>

## Block Until Timestamp

`/aviator block until <timestamp>` will block a pull request from being merged until the given time has passed. Examples of valid timestamps include:

* Absolute ISO timestamp: `2025-02-15T12:30:00.000+0000`
* Date: `2025-02-15`
* Time: `9pm`
* Day of the Week: `Monday`
* Day + Time: `Monday 9pm`

<figure><img src="https://273246003-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOAPqUQVbLbsfI5YESl32%2Fuploads%2FBAhXNqZ9IosAmo4rCfTj%2F9AB1B054-11D5-455B-9440-2EEC311CB1E7_1_201_a.jpeg?alt=media&amp;token=58aa8940-9b8f-48c2-93ab-8022a11dbe64" alt=""><figcaption></figcaption></figure>

## Cancel Block

`/aviator block cancel` will cancel all block conditions placed on the PR


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