Update src/contribution-guide/index.md

Author: kateinoigakukun

src/README.md

@@ -12,3 +12,12 @@ WebAssembly is described on its [home page](https://webassembly.org/) as:
 
 
 We use LLVM as a compiler backend to produce WebAssembly binaries. Our resulting binaries also depend on [WASI](https://wasi.dev), which is a modular system interface for WebAssembly. WASI is mainly required to compile Swift Standard Library.
+
+## Project Status
+
+[All compiler and standard library changes have been upstreamed to the official Swift repository, and the upstream CI is now testing WebAssembly targets.](https://forums.swift.org/t/stdlib-and-runtime-tests-for-wasm-wasi-now-available-on-swift-ci/70385)
+
+The remaining works are:
+
+- Upstreaming the changes to the Foundation and XCTest projects.
+- Integrating the build system with the official Swift CI.

src/contribution-guide/index.md

@@ -1,28 +1,12 @@
 # Contribution Guide
 
-## Forum posts
-
-- [Design of this project](https://forums.swift.org/t/wasm-support/16087/14)
-- [Swift Package Manager Support](https://forums.swift.org/t/webassembly-swiftpm/34343)
-
 ## Repositories
 
-### [swiftwasm/swift](https://github.com/swiftwasm/swift)
-
-The main repository of this project. Forked from [apple/swift](https://github.com/swiftwasm/swift). We are tracking upstream changes using [pull](https://github.com/wei/pull)
+### [swiftwasm/swiftwasm-build](https://github.com/swiftwasm/swiftwasm-build)
 
-#### Branching scheme
-
-- `swiftwasm` is the main development branch.
-- `main` is a mirror of the `main` branch of the upstream `apple/swift` repository. This branch is necessary to avoid [some issues](https://github.com/swiftwasm/swift/pull/36).
-- `swiftwasm-release/VERSION` is the branch where `VERSION` release of SwiftWasm is prepared.
-- `release/VERSION` is a mirror of the upstream `release/VERSION` branch.
+The main development repository for the SwiftWasm project. It contains the build script and patches for building the Swift compiler and standard library for WebAssembly. See the [README](https://github.com/swiftwasm/swiftwasm-build/blob/main/README.md) for more information.
 
 ### [swiftwasm/icu4c-wasi](https://github.com/swiftwasm/icu4c-wasi)
 
 Build script and patches for building ICU project for WebAssembly. [The required changes to build 
 it](https://github.com/unicode-org/icu/pull/990) were merged to the upstream repository.
-
-### [swiftwasm/wasi-sdk-build](https://github.com/swiftwasm/wasi-sdk-build)
-
-We apply some patches for [WebAssembly/wasi-sdk](https://github.com/WebAssembly/wasi-sdk) and [WebAssembly/wasi-libc](https://github.com/WebAssembly/wasi-libc) to build `wasi-sysroot` with pthread header. There aren't so many diff from upstream.