At the moment there are two ways to contribute to Yagi.
Learn Cairo and create task. We believe creating an automation task is one of the simplest programming challenges one could do in Cairo that can be useful to end-users. For task ideas, please refer to Broken link or come up with your own.
Suggest tasks and automation ideas in the #starknet-yield channel in Discord (e.g., "How could I create a limit order?", "I would like my Realms farming to be automated").