AWS Lambda Extensions is a new way to easily integrate AWS Lambda with your favorite tools. Lambda extensions augment your Lambda functions and work within Lambda’s shorter compute duration without having to maintain a long-running process. You can add an extension to your functions, in effect plugging them in, and use existing tools to deeply integrate with the Lambda service to pull data out about functions invocations. There are a number of use cases for extensions. These include observability, and logging, being able to capture diagnostic telemetry data, not only during function invocation, but before, and after as well. You can use extensions which automatically instrument your code to get insights into how your functions are running. You can also use extensions to fetch and cache configuration settings, or other values before your functions themselves run. Hardened security agents can run as extensions to detect and alert on function activity.