diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cbd361f3..15145ba5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -64,4 +64,3 @@ jobs:
 
       - name: Run tests
         run: ./scripts/test
-
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 06d77054..2d326e4f 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,5 +1,5 @@
 {
-  ".": "0.39.0",
+  ".": "0.40.0",
   "packages/vertex-sdk": "0.7.0",
   "packages/bedrock-sdk": "0.12.4"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8673eb90..f21e9abe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,26 @@
 # Changelog
 
+## 0.40.0 (2025-03-23)
+
+Full Changelog: [sdk-v0.39.0...sdk-v0.40.0](https://github.com/anthropics/anthropic-sdk-typescript/compare/sdk-v0.39.0...sdk-v0.40.0)
+
+### Features
+
+* add SKIP_BREW env var to ./scripts/bootstrap ([#710](https://github.com/anthropics/anthropic-sdk-typescript/issues/710)) ([1b8376a](https://github.com/anthropics/anthropic-sdk-typescript/commit/1b8376aac5475e1bb6b5f79c7c5684ab77908c1f))
+* **client:** accept RFC6838 JSON content types ([#713](https://github.com/anthropics/anthropic-sdk-typescript/issues/713)) ([fc32787](https://github.com/anthropics/anthropic-sdk-typescript/commit/fc3278702b3d27f792006e9710432f612e856af1))
+
+
+### Bug Fixes
+
+* **exports:** ensure resource imports don't require /index ([#717](https://github.com/anthropics/anthropic-sdk-typescript/issues/717)) ([56b2a80](https://github.com/anthropics/anthropic-sdk-typescript/commit/56b2a80145999256d4c075cf48be891df7832aad))
+* remove duplicate exports ([2df4cdd](https://github.com/anthropics/anthropic-sdk-typescript/commit/2df4cdd6f3a4f35a858fde57ce6327c50d3319d8))
+
+
+### Chores
+
+* **internal:** import ordering changes ([#708](https://github.com/anthropics/anthropic-sdk-typescript/issues/708)) ([a5680e1](https://github.com/anthropics/anthropic-sdk-typescript/commit/a5680e1466a6ea1bed0ddc4c880dd4e342ea1350))
+* **internal:** remove extra empty newlines ([#716](https://github.com/anthropics/anthropic-sdk-typescript/issues/716)) ([4d3c024](https://github.com/anthropics/anthropic-sdk-typescript/commit/4d3c02496ee09625fbcb5da545e90faa3890a885))
+
 ## 0.39.0 (2025-02-28)
 
 Full Changelog: [sdk-v0.38.0...sdk-v0.39.0](https://github.com/anthropics/anthropic-sdk-typescript/compare/sdk-v0.38.0...sdk-v0.39.0)
diff --git a/api.md b/api.md
index b8cae7e0..73ec47cc 100644
--- a/api.md
+++ b/api.md
@@ -32,23 +32,16 @@ Types:
 - <code><a href="./src/resources/messages/messages.ts">CitationsConfigParam</a></code>
 - <code><a href="./src/resources/messages/messages.ts">CitationsDelta</a></code>
 - <code><a href="./src/resources/messages/messages.ts">ContentBlock</a></code>
-- <code><a href="./src/resources/messages/messages.ts">ContentBlockDeltaEvent</a></code>
 - <code><a href="./src/resources/messages/messages.ts">ContentBlockParam</a></code>
 - <code><a href="./src/resources/messages/messages.ts">ContentBlockSource</a></code>
 - <code><a href="./src/resources/messages/messages.ts">ContentBlockSourceContent</a></code>
-- <code><a href="./src/resources/messages/messages.ts">ContentBlockStartEvent</a></code>
-- <code><a href="./src/resources/messages/messages.ts">ContentBlockStopEvent</a></code>
 - <code><a href="./src/resources/messages/messages.ts">DocumentBlockParam</a></code>
 - <code><a href="./src/resources/messages/messages.ts">ImageBlockParam</a></code>
 - <code><a href="./src/resources/messages/messages.ts">InputJSONDelta</a></code>
 - <code><a href="./src/resources/messages/messages.ts">Message</a></code>
 - <code><a href="./src/resources/messages/messages.ts">MessageCountTokensTool</a></code>
-- <code><a href="./src/resources/messages/messages.ts">MessageDeltaEvent</a></code>
 - <code><a href="./src/resources/messages/messages.ts">MessageDeltaUsage</a></code>
 - <code><a href="./src/resources/messages/messages.ts">MessageParam</a></code>
-- <code><a href="./src/resources/messages/messages.ts">MessageStartEvent</a></code>
-- <code><a href="./src/resources/messages/messages.ts">MessageStopEvent</a></code>
-- <code><a href="./src/resources/messages/messages.ts">MessageStreamEvent</a></code>
 - <code><a href="./src/resources/messages/messages.ts">MessageTokensCount</a></code>
 - <code><a href="./src/resources/messages/messages.ts">Metadata</a></code>
 - <code><a href="./src/resources/messages/messages.ts">Model</a></code>
@@ -89,6 +82,13 @@ Types:
 - <code><a href="./src/resources/messages/messages.ts">URLImageSource</a></code>
 - <code><a href="./src/resources/messages/messages.ts">URLPDFSource</a></code>
 - <code><a href="./src/resources/messages/messages.ts">Usage</a></code>
+- <code><a href="./src/resources/messages/messages.ts">MessageStreamEvent</a></code>
+- <code><a href="./src/resources/messages/messages.ts">MessageStartEvent</a></code>
+- <code><a href="./src/resources/messages/messages.ts">MessageDeltaEvent</a></code>
+- <code><a href="./src/resources/messages/messages.ts">MessageStopEvent</a></code>
+- <code><a href="./src/resources/messages/messages.ts">ContentBlockStartEvent</a></code>
+- <code><a href="./src/resources/messages/messages.ts">ContentBlockDeltaEvent</a></code>
+- <code><a href="./src/resources/messages/messages.ts">ContentBlockStopEvent</a></code>
 
 Methods:
 
diff --git a/package.json b/package.json
index 0849de72..08b9b91d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@anthropic-ai/sdk",
-  "version": "0.39.0",
+  "version": "0.40.0",
   "description": "The official TypeScript library for the Anthropic API",
   "author": "Anthropic <support@anthropic.com>",
   "types": "dist/index.d.ts",
diff --git a/packages/bedrock-sdk/yarn.lock b/packages/bedrock-sdk/yarn.lock
index bb2b37ea..3853f55b 100644
--- a/packages/bedrock-sdk/yarn.lock
+++ b/packages/bedrock-sdk/yarn.lock
@@ -17,7 +17,7 @@
 
 "@anthropic-ai/sdk@file:../../dist":
   # x-release-please-start-version
-  version "0.39.0"
+  version "0.40.0"
   # x-release-please-end-version
   dependencies:
     "@types/node" "^18.11.18"
diff --git a/packages/vertex-sdk/yarn.lock b/packages/vertex-sdk/yarn.lock
index 2f2395ba..eee2a017 100644
--- a/packages/vertex-sdk/yarn.lock
+++ b/packages/vertex-sdk/yarn.lock
@@ -17,7 +17,7 @@
 
 "@anthropic-ai/sdk@file:../../dist":
   # x-release-please-start-version
-  version "0.39.0"
+  version "0.40.0"
   # x-release-please-end-version
   dependencies:
     "@types/node" "^18.11.18"
diff --git a/scripts/bootstrap b/scripts/bootstrap
index 05dd47a6..0af58e25 100755
--- a/scripts/bootstrap
+++ b/scripts/bootstrap
@@ -4,7 +4,7 @@ set -e
 
 cd "$(dirname "$0")/.."
 
-if [ -f "Brewfile" ] && [ "$(uname -s)" = "Darwin" ]; then
+if [ -f "Brewfile" ] && [ "$(uname -s)" = "Darwin" ] && [ "$SKIP_BREW" != "1" ]; then
   brew bundle check >/dev/null 2>&1 || {
     echo "==> Installing Homebrew dependencies…"
     brew bundle
diff --git a/src/core.ts b/src/core.ts
index eac9d602..cdde4f0f 100644
--- a/src/core.ts
+++ b/src/core.ts
@@ -62,8 +62,8 @@ async function defaultParseResponse<T>(props: APIResponseProps): Promise<WithReq
   }
 
   const contentType = response.headers.get('content-type');
-  const isJSON =
-    contentType?.includes('application/json') || contentType?.includes('application/vnd.api+json');
+  const mediaType = contentType?.split(';')[0]?.trim();
+  const isJSON = mediaType?.includes('application/json') || mediaType?.endsWith('+json');
   if (isJSON) {
     const json = await response.json();
 
diff --git a/src/index.ts b/src/index.ts
index c072e82a..7b778405 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -362,23 +362,16 @@ export declare namespace Anthropic {
     type CitationsConfigParam as CitationsConfigParam,
     type CitationsDelta as CitationsDelta,
     type ContentBlock as ContentBlock,
-    type ContentBlockDeltaEvent as ContentBlockDeltaEvent,
     type ContentBlockParam as ContentBlockParam,
     type ContentBlockSource as ContentBlockSource,
     type ContentBlockSourceContent as ContentBlockSourceContent,
-    type ContentBlockStartEvent as ContentBlockStartEvent,
-    type ContentBlockStopEvent as ContentBlockStopEvent,
     type DocumentBlockParam as DocumentBlockParam,
     type ImageBlockParam as ImageBlockParam,
     type InputJSONDelta as InputJSONDelta,
     type Message as Message,
     type MessageCountTokensTool as MessageCountTokensTool,
-    type MessageDeltaEvent as MessageDeltaEvent,
     type MessageDeltaUsage as MessageDeltaUsage,
     type MessageParam as MessageParam,
-    type MessageStartEvent as MessageStartEvent,
-    type MessageStopEvent as MessageStopEvent,
-    type MessageStreamEvent as MessageStreamEvent,
     type MessageTokensCount as MessageTokensCount,
     type Metadata as Metadata,
     type Model as Model,
@@ -419,6 +412,13 @@ export declare namespace Anthropic {
     type URLImageSource as URLImageSource,
     type URLPDFSource as URLPDFSource,
     type Usage as Usage,
+    type MessageStreamEvent as MessageStreamEvent,
+    type MessageStartEvent as MessageStartEvent,
+    type MessageDeltaEvent as MessageDeltaEvent,
+    type MessageStopEvent as MessageStopEvent,
+    type ContentBlockStartEvent as ContentBlockStartEvent,
+    type ContentBlockDeltaEvent as ContentBlockDeltaEvent,
+    type ContentBlockStopEvent as ContentBlockStopEvent,
     type MessageCreateParams as MessageCreateParams,
     type MessageCreateParamsNonStreaming as MessageCreateParamsNonStreaming,
     type MessageCreateParamsStreaming as MessageCreateParamsStreaming,
diff --git a/src/resources/beta.ts b/src/resources/beta.ts
new file mode 100644
index 00000000..1542e942
--- /dev/null
+++ b/src/resources/beta.ts
@@ -0,0 +1,3 @@
+// File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
+
+export * from './beta/index';
diff --git a/src/resources/beta/messages.ts b/src/resources/beta/messages.ts
new file mode 100644
index 00000000..eb175230
--- /dev/null
+++ b/src/resources/beta/messages.ts
@@ -0,0 +1,3 @@
+// File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
+
+export * from './messages/index';
diff --git a/src/resources/index.ts b/src/resources/index.ts
index 81477103..542b48bc 100644
--- a/src/resources/index.ts
+++ b/src/resources/index.ts
@@ -37,24 +37,17 @@ export {
   type CitationsConfigParam,
   type CitationsDelta,
   type ContentBlock,
-  type ContentBlockDeltaEvent,
   type ContentBlockParam,
   type ContentBlockSource,
   type ContentBlockSourceContent,
-  type ContentBlockStartEvent,
-  type ContentBlockStopEvent,
   type DocumentBlockParam,
   type ImageBlockParam,
   type InputJsonDelta,
   type InputJSONDelta,
   type Message,
   type MessageCountTokensTool,
-  type MessageDeltaEvent,
   type MessageDeltaUsage,
   type MessageParam,
-  type MessageStartEvent,
-  type MessageStopEvent,
-  type MessageStreamEvent,
   type MessageStreamParams,
   type MessageTokensCount,
   type Metadata,
@@ -96,6 +89,13 @@ export {
   type URLImageSource,
   type URLPDFSource,
   type Usage,
+  type MessageStreamEvent,
+  type MessageStartEvent,
+  type MessageDeltaEvent,
+  type MessageStopEvent,
+  type ContentBlockStartEvent,
+  type ContentBlockDeltaEvent,
+  type ContentBlockStopEvent,
   type MessageCreateParams,
   type MessageCreateParamsNonStreaming,
   type MessageCreateParamsStreaming,
diff --git a/src/resources/messages.ts b/src/resources/messages.ts
new file mode 100644
index 00000000..eb175230
--- /dev/null
+++ b/src/resources/messages.ts
@@ -0,0 +1,3 @@
+// File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
+
+export * from './messages/index';
diff --git a/src/resources/messages/index.ts b/src/resources/messages/index.ts
index 1011fbd3..bc669936 100644
--- a/src/resources/messages/index.ts
+++ b/src/resources/messages/index.ts
@@ -29,23 +29,16 @@ export {
   type CitationsConfigParam,
   type CitationsDelta,
   type ContentBlock,
-  type ContentBlockDeltaEvent,
   type ContentBlockParam,
   type ContentBlockSource,
   type ContentBlockSourceContent,
-  type ContentBlockStartEvent,
-  type ContentBlockStopEvent,
   type DocumentBlockParam,
   type ImageBlockParam,
   type InputJSONDelta,
   type Message,
   type MessageCountTokensTool,
-  type MessageDeltaEvent,
   type MessageDeltaUsage,
   type MessageParam,
-  type MessageStartEvent,
-  type MessageStopEvent,
-  type MessageStreamEvent,
   type MessageTokensCount,
   type Metadata,
   type Model,
@@ -86,6 +79,13 @@ export {
   type URLImageSource,
   type URLPDFSource,
   type Usage,
+  type MessageStreamEvent,
+  type MessageStartEvent,
+  type MessageDeltaEvent,
+  type MessageStopEvent,
+  type ContentBlockStartEvent,
+  type ContentBlockDeltaEvent,
+  type ContentBlockStopEvent,
   type MessageCreateParams,
   type MessageCreateParamsBase,
   type MessageCreateParamsNonStreaming,
diff --git a/src/resources/messages/messages.ts b/src/resources/messages/messages.ts
index 86f198bb..30bdf203 100644
--- a/src/resources/messages/messages.ts
+++ b/src/resources/messages/messages.ts
@@ -207,8 +207,6 @@ export interface CitationsDelta {
 
 export type ContentBlock = TextBlock | ToolUseBlock | ThinkingBlock | RedactedThinkingBlock;
 
-export type ContentBlockDeltaEvent = RawContentBlockDeltaEvent;
-
 export type ContentBlockParam =
   | TextBlockParam
   | ImageBlockParam
@@ -226,10 +224,6 @@ export interface ContentBlockSource {
 
 export type ContentBlockSourceContent = TextBlockParam | ImageBlockParam;
 
-export type ContentBlockStartEvent = RawContentBlockStartEvent;
-
-export type ContentBlockStopEvent = RawContentBlockStopEvent;
-
 export interface DocumentBlockParam {
   source: Base64PDFSource | PlainTextSource | ContentBlockSource | URLPDFSource;
 
@@ -370,8 +364,6 @@ export interface Message {
 
 export type MessageCountTokensTool = Tool | ToolBash20250124 | ToolTextEditor20250124;
 
-export type MessageDeltaEvent = RawMessageDeltaEvent;
-
 export interface MessageDeltaUsage {
   /**
    * The cumulative number of output tokens which were used.
@@ -385,12 +377,6 @@ export interface MessageParam {
   role: 'user' | 'assistant';
 }
 
-export type MessageStartEvent = RawMessageStartEvent;
-
-export type MessageStopEvent = RawMessageStopEvent;
-
-export type MessageStreamEvent = RawMessageStreamEvent;
-
 export interface MessageTokensCount {
   /**
    * The total number of tokens across the provided list of messages, system prompt,
@@ -840,6 +826,20 @@ export interface Usage {
   output_tokens: number;
 }
 
+export type MessageStreamEvent = RawMessageStreamEvent;
+
+export type MessageStartEvent = RawMessageStartEvent;
+
+export type MessageDeltaEvent = RawMessageDeltaEvent;
+
+export type MessageStopEvent = RawMessageStopEvent;
+
+export type ContentBlockStartEvent = RawContentBlockStartEvent;
+
+export type ContentBlockDeltaEvent = RawContentBlockDeltaEvent;
+
+export type ContentBlockStopEvent = RawContentBlockStopEvent;
+
 export type MessageCreateParams = MessageCreateParamsNonStreaming | MessageCreateParamsStreaming;
 
 export interface MessageCreateParamsBase {
@@ -1379,24 +1379,17 @@ export declare namespace Messages {
     type CitationsConfigParam as CitationsConfigParam,
     type CitationsDelta as CitationsDelta,
     type ContentBlock as ContentBlock,
-    type ContentBlockDeltaEvent as ContentBlockDeltaEvent,
     type ContentBlockParam as ContentBlockParam,
     type ContentBlockSource as ContentBlockSource,
     type ContentBlockSourceContent as ContentBlockSourceContent,
-    type ContentBlockStartEvent as ContentBlockStartEvent,
-    type ContentBlockStopEvent as ContentBlockStopEvent,
     type DocumentBlockParam as DocumentBlockParam,
     type ImageBlockParam as ImageBlockParam,
     type InputJsonDelta as InputJsonDelta,
     type InputJSONDelta as InputJSONDelta,
     type Message as Message,
     type MessageCountTokensTool as MessageCountTokensTool,
-    type MessageDeltaEvent as MessageDeltaEvent,
     type MessageDeltaUsage as MessageDeltaUsage,
     type MessageParam as MessageParam,
-    type MessageStartEvent as MessageStartEvent,
-    type MessageStopEvent as MessageStopEvent,
-    type MessageStreamEvent as MessageStreamEvent,
     type MessageTokensCount as MessageTokensCount,
     type Metadata as Metadata,
     type Model as Model,
@@ -1437,6 +1430,13 @@ export declare namespace Messages {
     type URLImageSource as URLImageSource,
     type URLPDFSource as URLPDFSource,
     type Usage as Usage,
+    type MessageStreamEvent as MessageStreamEvent,
+    type MessageStartEvent as MessageStartEvent,
+    type MessageDeltaEvent as MessageDeltaEvent,
+    type MessageStopEvent as MessageStopEvent,
+    type ContentBlockStartEvent as ContentBlockStartEvent,
+    type ContentBlockDeltaEvent as ContentBlockDeltaEvent,
+    type ContentBlockStopEvent as ContentBlockStopEvent,
     type MessageCreateParams as MessageCreateParams,
     type MessageCreateParamsNonStreaming as MessageCreateParamsNonStreaming,
     type MessageCreateParamsStreaming as MessageCreateParamsStreaming,
diff --git a/src/version.ts b/src/version.ts
index 5f972a92..c17cceec 100644
--- a/src/version.ts
+++ b/src/version.ts
@@ -1 +1 @@
-export const VERSION = '0.39.0'; // x-release-please-version
+export const VERSION = '0.40.0'; // x-release-please-version