Let's take a look at each repo:
Firebase iOS SDK 4.0https://github.com/firebase/firebase-ios-sdk
With the launch of the Firebase iOS 4.0 SDKs we have made several improvements to the developer experience, such as more idiomatic API names for our Swift users. By open sourcing our iOS SDKs we hope to provide an additional avenue for you to give us feedback on such features. For this first release we are open sourcing our Realtime Database, Auth, Cloud Storage and Cloud Messaging (FCM) SDKs, but going forward we intend to release more.
Because we aren't yet able to open source some of the Firebase components, the full product build process isn't available. While you can use this repo to build a FirebaseDev pod, our libraries distributed through CocoaPods will continue to be static frameworks for the time being. We are continually looking for ways to improve the developer experience for developers, however you integrate.
Our GitHub README provides more details on how you build, test and contribute to our iOS SDKs.
Our GitHub repo includes instructions on how you can build, test and contribute.
Firebase Admin SDKsNode.js: https://github.com/firebase/firebase-admin-node
We are happy to announce that all three of our Admin SDKs for accessing Firebase on privileged environments are now fully open source, including our recently-launched Python SDK. While we continue to explore supporting more languages, we encourage you to use our source as inspiration to enable Firebase for your environment (and if you do, we'd love to hear about it!)
We're really excited to see what you do with the updated SDKs - as always reach out to us with feedback or questions in the Firebase-Talk Google Group, on Stack Overflow, via the Firebase Support team, and now on GitHub for SDK issues and pull requests! And to read about the other improvements to Firebase that launched at Google I/O, head over to the Firebase blog.
By Salman Qadri, Firebase Product Manager