I will talk about implementing Elvish (https://elv.sh), a modern shell with Go. I will cover the following topics:

• An introduction to Elvish, including how to integrate it with Go-based tools for real-world scripting use cases
• How Go makes it easy to implement Elvish, such as pipeline semantics, standard library
• Testing strategy of Elvish as a case study of testing complex Go projects - Elvish has a test coverage of 92% and increasing, uses both unit tests, end-to-end tests and fuzzing