google/adk-samples — reverse-engineered prompt

Build me a sample repo for Google Agent Development Kit that helps people quickly try different AI agents.

I want it to feel like a friendly cookbook, not a production app. Include clear examples in Python, TypeScript, Go, Java, Kotlin, and Android, with each language having its own simple setup notes. The samples should cover common ideas like a simple chat bot, customer service helper, travel concierge, blog writer, research assistant, data science helper, bug assistant, document analyzer, shopping assistant, and finance helper.

Make the repo easy to browse, with a main README that explains what ADK is, how to install it, where each language folder lives, and how to run the examples. Add basic contributing notes, license info, and a short disclaimer that these are demos only.

Keep the code clean and beginner friendly. If you need exact ADK setup details, look up the current docs online.