Merge main into feature/http-1.x

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ on:
         required: false
 
 env:
-  rust_version: 1.86.0
+  rust_version: 1.88.0
   rust_toolchain_components: clippy,rustfmt
   ENCRYPTED_DOCKER_PASSWORD: ${{ secrets.ENCRYPTED_DOCKER_PASSWORD }}
   DOCKER_LOGIN_TOKEN_PASSPHRASE: ${{ secrets.DOCKER_LOGIN_TOKEN_PASSPHRASE }}

.github/workflows/claim-crate-names.yml

@@ -10,7 +10,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  rust_version: 1.86.0
+  rust_version: 1.88.0
 
 name: Claim unpublished crate names on crates.io
 run-name: ${{ github.workflow }}

.github/workflows/github-pages.yml

@@ -8,7 +8,7 @@ on:
 name: Update GitHub Pages
 
 env:
-  rust_version: 1.86.0
+  rust_version: 1.88.0
 
 # Allow only one doc pages build to run at a time for the entire smithy-rs repo
 concurrency:

.github/workflows/release.yml

@@ -10,7 +10,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  rust_version: 1.86.0
+  rust_version: 1.88.0
 
 name: Release smithy-rs
 on:

.github/workflows/update-sdk-next.yml

@@ -46,7 +46,7 @@ jobs:
     - name: Set up Rust
       uses: dtolnay/rust-toolchain@master
       with:
-        toolchain: 1.86.0
+        toolchain: 1.88.0
     - name: Delete old SDK
       run: |
     - name: Generate a fresh SDK

AGENTS.md

@@ -48,6 +48,26 @@ operation MyOperation {
 - **`codegen-core/common-test-models/constraints.smithy`** - Constraint validation tests with restJson1
 - **`codegen-client-test/model/main.smithy`** - awsJson1_1 protocol tests
 
+### httpQueryParams Bug Investigation
+
+When investigating the `@httpQueryParams` bug (where query parameters weren't appearing in requests), the issue was in `RequestBindingGenerator.kt` line 173. The bug occurred when:
+
+1. An operation had ONLY `@httpQueryParams` (no regular `@httpQuery` parameters)
+2. The condition `if (dynamicParams.isEmpty() && literalParams.isEmpty() && mapParams.isEmpty())` would skip generating the `uri_query` function
+
+The fix was to ensure `mapParams.isEmpty()` was included in the condition check. The current implementation correctly generates query parameters for `@httpQueryParams` even when no other query parameters exist.
+
+**Testing httpQueryParams**: Create operations with only `@httpQueryParams` to ensure they generate proper query strings in requests.
+
+## rustTemplate Formatting
+
+**CRITICAL**: Because `#` is the formatting character in `rustTemplate`, Rust attributes must be escaped:
+
+❌ Wrong: `#[derive(Debug)]`
+✅ Correct: `##[derive(Debug)]`
+
+This applies to ALL Rust attributes: `##[non_exhaustive]`, `##[derive(...)]`, `##[cfg(...)]`, etc.
+
 ## preludeScope: Rust Prelude Types
 
 **Always use `preludeScope` for Rust prelude types:**

CHANGELOG.md

@@ -1,4 +1,55 @@
 <!-- Do not manually edit this file. Use the `changelogger` tool. -->
+November 6th, 2025
+==================
+**New this release:**
+- (client) Bump crc-fast version to 1.6.0
+- (client) Validate `Region` is a valid host label when constructing endpoints.
+
+
+October 30th, 2025
+==================
+**Breaking Changes:**
+- :warning::tada: (server, [smithy-rs#4356](https://github.com/smithy-lang/smithy-rs/issues/4356)) Parse EventStream signed-frames for servers marked with `@sigv4`.
+
+    This is a breaking change, because events from SigV4 services are wrapped in a SignedEvent frame.
+- :warning: (all, [smithy-rs#4367](https://github.com/smithy-lang/smithy-rs/issues/4367)) Upgrade MSRV to Rust 1.88.0.
+
+**New this release:**
+- :bug::tada: (server, [smithy-rs#4352](https://github.com/smithy-lang/smithy-rs/issues/4352), [smithy-rs#4345](https://github.com/smithy-lang/smithy-rs/issues/4345)) Update smithy-rs servers to support sending `initial-response` events over event streams.
+
+    Prior to this change, event streams that had initial responses were unsupported. This change also adds a new codegen setting, `alwaysSendEventStreamInitialResponse`.
+
+    When this setting is set to `true`, the generated server will unconditionally send `initial-response` objects, even when empty. This is required for compatibility with smithy-java as well as a few other clients.
+
+    This setting defaults to false currently because smithy-rs based clients do not currently support this behavior.
+
+    ```json
+    "codegen": {
+      "alwaysSendEventStreamInitialResponse": true // default false
+    }
+    ```
+- :tada: (all, @arielby) Include the protocol name in `package.metadata.smithy.protocol` in `Cargo.toml`
+    to allow easily figuring out which protocol was used to generate a crate.
+- :bug::tada: (client, [smithy-rs#4349](https://github.com/smithy-lang/smithy-rs/issues/4349), @arielby) Make Hyper idle pool timeout configurable, and fix the bug where pool timeouts
+    would not work if the client was built directly.
+- :tada: (server, [smithy-rs#4317](https://github.com/smithy-lang/smithy-rs/issues/4317), @jasgin) Adds validators and codegen support for the custom traits custom traits `@validationException`, `@validationMessage`,
+    `@validationFieldList`, `@validationFieldName`, and `@validationFieldMessage` for defining a custom validation exception
+    to use instead of `smithy.framework#ValidationException`.
+- :bug: (client, [smithy-rs#4346](https://github.com/smithy-lang/smithy-rs/issues/4346)) Fix bug where httpQueryParams were silently dropped when no other query parameters were modeled.
+- :bug: (server, [smithy-rs#4344](https://github.com/smithy-lang/smithy-rs/issues/4344), [smithy-rs#4325](https://github.com/smithy-lang/smithy-rs/issues/4325)) Fix bug where servers did not attempt to parse an `initial-request`. `initial-requests` may be sent by clients both when they would contain valid data
+    and when they are empty.
+- :bug: (client, [smithy-rs#4352](https://github.com/smithy-lang/smithy-rs/issues/4352), [smithy-rs#4353](https://github.com/smithy-lang/smithy-rs/issues/4353)) Update clients to allow `initial-response` events to be accepted on event streams, even when know modeled initial response exists.
+
+    This is required for spec compliance, backwards compatibility, and compatibility with non-smithy-rs based servers that
+    MAY unconditionally send `initial-response` messages.
+- :bug: (client, [smithy-rs#4265](https://github.com/smithy-lang/smithy-rs/issues/4265), [smithy-rs#4189](https://github.com/smithy-lang/smithy-rs/issues/4189)) Adds new `with_test_defaults_v2()` for all clients supporting region configuration which applies `us-east-1` as default region if not set by user. This allows `aws-smithy-mocks` to work for non AWS SDK generated clients. Also clarify `test-util` feature requirement when using `aws-smithy-mocks`.
+
+**Contributors**
+Thank you for your contributions! ❤
+- @arielby ([smithy-rs#4349](https://github.com/smithy-lang/smithy-rs/issues/4349))
+- @jasgin ([smithy-rs#4317](https://github.com/smithy-lang/smithy-rs/issues/4317))
+
+
 October 6th, 2025
 =================
 **New this release:**

aws/SDK_CHANGELOG.next.json

@@ -6,18 +6,86 @@
   "smithy-rs": [],
   "aws-sdk-rust": [
     {
-      "message": "Make [`TokenBucket`](https://docs.rs/aws-smithy-runtime/latest/aws_smithy_runtime/client/retries/struct.TokenBucket.html) and [`ClientRateLimiter`](https://docs.rs/aws-smithy-runtime/latest/aws_smithy_runtime/client/retries/struct.ClientRateLimiter.html) configurable through [`RetryPartition`](https://docs.rs/aws-smithy-runtime/latest/aws_smithy_runtime/client/retries/struct.RetryPartition.html).\n",
+      "message": "Update clients to allow `initial-response` events to be accepted on event streams, even when know modeled initial response exists.\n\nThis is required for spec compliance, backwards compatibility, and compatibility with non-smithy-rs based servers that\nMAY unconditionally send `initial-response` messages.\n",
+      "meta": {
+        "bug": true,
+        "breaking": false,
+        "tada": false
+      },
+      "author": "rcoh",
+      "references": [
+        "smithy-rs#4352",
+        "smithy-rs#4353"
+      ],
+      "since-commit": "cf1e783d15842aab12e1ee02ce9d329b8443e848",
+      "age": 2
+    },
+    {
+      "message": "Add tags to `AssumeRoleProviderBuilder`\n",
       "meta": {
         "bug": false,
         "breaking": false,
+        "tada": true
+      },
+      "author": "c-thiel",
+      "references": [
+        "aws-sdk-rust#1366"
+      ],
+      "since-commit": "cf1e783d15842aab12e1ee02ce9d329b8443e848",
+      "age": 2
+    },
+    {
+      "message": "Adds new `with_test_defaults_v2()` for all clients supporting region configuration which applies `us-east-1` as default region if not set by user. This allows `aws-smithy-mocks` to work for non AWS SDK generated clients. Also clarify `test-util` feature requirement when using `aws-smithy-mocks`.\n",
+      "meta": {
+        "bug": true,
+        "breaking": false,
+        "tada": false
+      },
+      "author": "aajtodd",
+      "references": [
+        "smithy-rs#4265",
+        "smithy-rs#4189"
+      ],
+      "since-commit": "cf1e783d15842aab12e1ee02ce9d329b8443e848",
+      "age": 2
+    },
+    {
+      "message": "Upgrade MSRV to Rust 1.88.0.\n",
+      "meta": {
+        "bug": false,
+        "breaking": true,
         "tada": false
       },
       "author": "ysaito1001",
       "references": [
-        "smithy-rs#4263"
+        "smithy-rs#4367"
       ],
-      "since-commit": "f18c70d36c40fa0f40860547394c134566704e69",
-      "age": 5
+      "since-commit": "cf1e783d15842aab12e1ee02ce9d329b8443e848",
+      "age": 2
+    },
+    {
+      "message": "Bump crc-fast version to 1.6.0\n",
+      "meta": {
+        "bug": false,
+        "breaking": false,
+        "tada": false
+      },
+      "author": "landonxjames",
+      "references": [],
+      "since-commit": "4533810c833251e78df3d8a4992b8ccc5f2fc67c",
+      "age": 1
+    },
+    {
+      "message": "Validate `Region` is a valid host label when constructing endpoints.\n",
+      "meta": {
+        "bug": false,
+        "breaking": false,
+        "tada": false
+      },
+      "author": "aajtodd",
+      "references": [],
+      "since-commit": "4533810c833251e78df3d8a4992b8ccc5f2fc67c",
+      "age": 1
     }
   ],
   "aws-sdk-model": []