Hey, hey @sayakmukhopadhyay!

Been a while on this post, but I’m going back through the API category for unanswered topics and didn’t want to let this slip through. It’s entirely possible you’ve already found your answer, but if anyone else comes looking, our docs speak to the differences.

For installation:

https://docs.github.com/en/developers/webhooks-and-events/webhook-events-and-payloads#installation

Activity related to a GitHub App installation. The type of activity is specified in the action property of the payload object.

…and note:

Note: This event replaces an event that will be deprecated. When you subscribe to this event, you will also receive the deprecated event integration_installation until it’s permanently removed. If you’re writing or updating API client code, use the installation event. The event contain the same information as the deprecated event.

Then, for installation_repositories:

https://docs.github.com/en/developers/webhooks-and-events/webhook-events-and-payloads#installation_repositories

Activity related to repositories being added to a GitHub App installation. The type of activity is specified in the action property of the payload object.

…and note:

Note: This event replaces an event that will be deprecated. When you subscribe to this event, you will also receive the deprecated event integration_installation_repositories until it’s permanently removed. If you’re writing or updating API client code, use the installation_repositories event. The event contain the same information as the deprecated event.

I’ve merely quoted our docs here, so please do let us know if there’s any remaining confusion! It’s possible our docs could do with some pruning and feedback is certainly welcome.

Thanks for jumping in. My main concern was knowing when exactly are these events triggered. Things like if one of the events can be triggered without the other Some examples would go a long way in understanding. Use cases and such.