# How Lambda@Edge works with requests and responses
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When you associate a CloudFront distribution with a Lambda@Edge function, CloudFront intercepts requests and responses at CloudFront edge locations. You can execute Lambda functions when the following CloudFront events occur:
+ When CloudFront receives a request from a viewer (viewer request)
+ Before CloudFront forwards a request to the origin (origin request)
+ When CloudFront receives a response from the origin (origin response)
+ Before CloudFront returns the response to the viewer (viewer response)

If you're using AWS WAF, the Lambda@Edge viewer request is executed after any AWS WAF rules are applied.

For more information, see [Work with requests and responses](lambda-generating-http-responses.md) and [Lambda@Edge event structure](lambda-event-structure.md).

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for Amazon CloudFront. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query AmazonCloudFront` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).