diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 27bbe0e9556..6271e301b9a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -333,6 +333,41 @@ jobs:
       shell: bash
       run: cross test --target ${{ matrix.target }} --manifest-path "aws/rust-runtime/Cargo.toml" ${{ matrix.test_aws_exclude }} --workspace
 
+  # Test runtime crates on multiple architectures to catch architecture-specific issues
+  # like crc-fast 1.4 SIGILL on ARM before merge
+  test-runtime-architectures:
+    name: Test Runtime (${{ matrix.target }})
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    strategy:
+      fail-fast: false
+      matrix:
+        target:
+          - x86_64-unknown-linux-gnu
+          - x86_64-unknown-linux-musl
+          - aarch64-unknown-linux-gnu
+          - aarch64-unknown-linux-musl
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        ref: ${{ inputs.git_ref }}
+    - uses: dtolnay/rust-toolchain@master
+      with:
+        toolchain: ${{ env.rust_version }}
+        targets: ${{ matrix.target }}
+    - uses: Swatinem/rust-cache@v2
+      with:
+        key: ${{ matrix.target }}
+    - name: Install cross
+      run: cargo install cross --git https://github.com/cross-rs/cross --locked
+    - name: Build smithy-rs runtime on ${{ matrix.target }}
+      shell: bash
+      run: cross build --target ${{ matrix.target }} --manifest-path "rust-runtime/Cargo.toml" --workspace --exclude aws-smithy-http-server-python --exclude aws-smithy-http-server-typescript --exclude aws-smithy-experimental
+    - name: Build AWS runtime on ${{ matrix.target }}
+      shell: bash
+      run: cross build --target ${{ matrix.target }} --manifest-path "aws/rust-runtime/Cargo.toml" --workspace
+
   # Run the canary against generated SDKs
   #
   # In addition to Matrix Success, this job will also be required to pass for merge.
@@ -391,6 +426,7 @@ jobs:
     - test-sdk
     - test-rust-windows
     - test-exotic-platform-support
+    - test-runtime-architectures
     # Run this job even if its dependency jobs fail
     if: always()
     runs-on: ubuntu-latest
diff --git a/aws/rust-runtime/aws-types/Cargo.toml b/aws/rust-runtime/aws-types/Cargo.toml
index fa650607e3d..d646553b499 100644
--- a/aws/rust-runtime/aws-types/Cargo.toml
+++ b/aws/rust-runtime/aws-types/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "aws-types"
-version = "1.3.11"
+version = "1.3.12"
 authors = ["AWS Rust SDK Team <aws-sdk-rust@amazon.com>", "Russell Cohen <rcoh@amazon.com>"]
 description = "Cross-service types for the AWS SDK."
 edition = "2021"
diff --git a/aws/rust-runtime/aws-types/src/sdk_config.rs b/aws/rust-runtime/aws-types/src/sdk_config.rs
index fc1f7080a53..5f7dea916e2 100644
--- a/aws/rust-runtime/aws-types/src/sdk_config.rs
+++ b/aws/rust-runtime/aws-types/src/sdk_config.rs
@@ -442,7 +442,7 @@ impl Builder {
     ///
     /// # Examples
     /// Disabling identity caching:
-    /// ```rust
+    /// ```ignore
     /// # use aws_types::SdkConfig;
     /// use aws_smithy_runtime::client::identity::IdentityCache;
     /// let config = SdkConfig::builder()
@@ -450,7 +450,7 @@ impl Builder {
     ///     .build();
     /// ```
     /// Changing settings on the default cache implementation:
-    /// ```rust
+    /// ```ignore
     /// # use aws_types::SdkConfig;
     /// use aws_smithy_runtime::client::identity::IdentityCache;
     /// use std::time::Duration;
@@ -475,7 +475,7 @@ impl Builder {
     /// expires.
     ///
     /// # Examples
-    /// ```rust
+    /// ```ignore
     /// # use aws_types::SdkConfig;
     /// use aws_smithy_runtime::client::identity::IdentityCache;
     ///