First draft of Wasm and Android compatibility blog post.

Author: daveverwer

Resources/Blog/Posts/adding-wasm-and-android-compatibility-testing.md

@@ -0,0 +1,24 @@
+We’re delighted to announce that we have added support for two new Swift platforms, Android and [Wasm](https://webassembly.org/), to our compatibility testing matrix.
+
+<picture class="shadow">
+  <source srcset="/images/blog/wasm-and-android-compatibility-matrix~dark.png" media="(prefers-color-scheme: dark)">
+  <img src="/images/blog/wasm-and-android-compatibility-matrix~light.png" alt="The Swift Package Index compatibility matrix showing columns for the Android and Wasm platforms.">
+</picture>
+
+Swift support for Wasm has been in development for [a long time](https://desiatov.com/swift-webassembly-2020/). Remarkably, [as of Swift 6.1](https://blog.swiftwasm.org/posts/6-1-released/) it requires no custom patches:
+
+> This is the first stable release we've built directly from the official swiftlang/swift source without any custom patches. This means all components (compiler, stdlib, Foundation, XCTest, swift-testing, etc.) have been fully upstreamed.
+
+There has also been plenty of community effort put into supporting Swift for Android. This includes the recent announcement of a [community working group](https://forums.swift.org/t/swift-on-android-working-group/77780) focused on the problem and the fact that [swift-everywhere.org](http://swift-everywhere.org) has been [tracking Android compatibility](https://skip.tools/blog/android-native-swift-packages/) for several months.
+
+The community has put a remarkable amount of effort into getting these platforms to this stage, and it seemed like a great time to add them to our compatibility testing system. So we did!
+
+As of today, all builds for both new platforms have finished and you can see compatibility on every package page.
+
+### Results
+
+After churning through X,XXX compatibility builds across both platforms for the past X days, we have some numbers to share! Of the ~9,000 currently indexed packages, **XX% build for Android** and **XX% build for Wasm**.
+
+TODO: Add commentary on the results.
+
+Is Windows compatibility testing next? We think so!

Resources/Blog/posts.yml

@@ -198,3 +198,8 @@
   summary: We've added support for custom package collections to allow well-known community efforts to present package collections.
   published_at: 2024-12-09
   published: true
+- slug: adding-wasm-and-android-compatibility-testing
+  title: Adding Wasm and Android compatibility testing
+  summary: You can now check the compatibility of every package in the Swift Package Index with Wasm and Android.
+  published_at: 2025-05-30
+  published: true