[pull] main from anthropics:main

.github/workflows/ci.yml

@@ -109,3 +109,45 @@ jobs:
 
       - name: Run tests
         run: ./scripts/test
+
+  detect_breaking_changes:
+    timeout-minutes: 10
+    name: detect-breaking-changes
+    runs-on: ${{ github.repository == 'stainless-sdks/anthropic-typescript' && 'depot-ubuntu-24.04' || 'ubuntu-latest' }}
+    if: |
+      (github.event_name == 'push' &&
+       github.ref != 'refs/heads/next' &&
+       !startsWith(github.ref, 'refs/heads/release-please--')) ||
+      github.event_name == 'pull_request'
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Fetch history for current branch and target branches
+        run: |
+          git fetch origin --filter=blob:none --no-tags --depth=2147483647 ${{ github.sha }}
+          git fetch origin --filter=blob:none --no-tags next main 2>/dev/null || true
+
+      - name: Set up Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install dependencies
+        run: yarn install
+
+      - name: Determine base SHA
+        run: |
+          if [ "${{ github.event_name }}" = "pull_request" ]; then
+            echo "BASE_SHA=${{ github.event.pull_request.base.sha }}" >> $GITHUB_ENV
+          else
+            BASE_SHA=$(git merge-base HEAD origin/next 2>/dev/null || git merge-base HEAD origin/main 2>/dev/null || echo "")
+            echo "BASE_SHA=$BASE_SHA" >> $GITHUB_ENV
+          fi
+
+      - name: Detect breaking changes
+        if: env.BASE_SHA != ''
+        run: |
+          # Try to check out previous versions of the breaking change detection script. This ensures that
+          # we still detect breaking changes when entire files and their tests are removed.
+          git checkout "$BASE_SHA" -- ./scripts/detect-breaking-changes 2>/dev/null || true
+          ./scripts/detect-breaking-changes "$BASE_SHA"

.github/workflows/create-releases.yml

@@ -16,7 +16,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
-      - uses: stainless-api/trigger-release-please@v1
+      - uses: stainless-api/trigger-release-please@bb6677c5a04578eec1ccfd9e1913b5b78ed64c61 # v1.4.0
         id: release
         with:
           repo: ${{ github.event.repository.full_name }}

.release-please-manifest.json

@@ -1,7 +1,7 @@
 {
-  ".": "0.91.1",
+  ".": "0.92.0",
   "packages/vertex-sdk": "0.16.0",
-  "packages/bedrock-sdk": "0.29.0",
+  "packages/bedrock-sdk": "0.29.1",
   "packages/foundry-sdk": "0.2.3",
   "packages/aws-sdk": "0.2.5"
 }

.stats.yml

@@ -1,4 +1,4 @@
 configured_endpoints: 91
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/anthropic%2Fanthropic-2d9a6272c569b37615ae2f2dc675bf9185bc2ea3dc2ecd32eb46b68f263b9924.yml
-openapi_spec_hash: 3716f6d62e618fe9018aee00e7c6dd80
-config_hash: 9c24b5adcecc3649a6ec0380bd583cdf
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/anthropic/anthropic-4175787f21d24cc3d87dcecce2df2469d10f92eee8e4f00af8a6dd36f7e13ffa.yml
+openapi_spec_hash: dc43ed54947d427a084a891b7c4a783a
+config_hash: 486e52c2d1bedf2dca1e33dcf8132987

CHANGELOG.md

@@ -1,5 +1,25 @@
 # Changelog
 
+## 0.92.0 (2026-04-30)
+
+Full Changelog: [sdk-v0.91.1...sdk-v0.92.0](https://github.com/anthropics/anthropic-sdk-typescript/compare/sdk-v0.91.1...sdk-v0.92.0)
+
+### Features
+
+* **api:** improve Managed Agents APIs ([ca1bf4a](https://github.com/anthropics/anthropic-sdk-typescript/commit/ca1bf4a9b278fddc7f082b1c4f2b3a3e4e20298d))
+* support setting headers via env ([32f67d4](https://github.com/anthropics/anthropic-sdk-typescript/commit/32f67d47952b12bb930c8bbfe87ab2ba2aee1882))
+
+
+### Bug Fixes
+
+* **bedrock:** throw APIError for error events delivered in chunk frames ([#1021](https://github.com/anthropics/anthropic-sdk-typescript/issues/1021)) ([3ae887b](https://github.com/anthropics/anthropic-sdk-typescript/commit/3ae887b89bde1721c75dc9c9812cb9ac191ffc92))
+
+
+### Chores
+
+* **format:** run eslint and prettier separately ([7ce257c](https://github.com/anthropics/anthropic-sdk-typescript/commit/7ce257c1b1ad9ff4e1cee19e82851bcb65e0e044))
+* **internal:** codegen related update ([f08cc77](https://github.com/anthropics/anthropic-sdk-typescript/commit/f08cc771efd596026f4247ecff418e7ef6a3b38a))
+
 ## 0.91.1 (2026-04-24)
 
 Full Changelog: [sdk-v0.91.0...sdk-v0.91.1](https://github.com/anthropics/anthropic-sdk-typescript/compare/sdk-v0.91.0...sdk-v0.91.1)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@anthropic-ai/sdk",
-  "version": "0.91.1",
+  "version": "0.92.0",
   "description": "The official TypeScript library for the Anthropic API",
   "author": "Anthropic <support@anthropic.com>",
   "types": "dist/index.d.ts",

packages/bedrock-sdk/CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.29.1 (2026-04-30)
+
+Full Changelog: [bedrock-sdk-v0.29.0...bedrock-sdk-v0.29.1](https://github.com/anthropics/anthropic-sdk-typescript/compare/bedrock-sdk-v0.29.0...bedrock-sdk-v0.29.1)
+
+### Bug Fixes
+
+* **bedrock:** throw APIError for error events delivered in chunk frames ([#1021](https://github.com/anthropics/anthropic-sdk-typescript/issues/1021)) ([3ae887b](https://github.com/anthropics/anthropic-sdk-typescript/commit/3ae887b89bde1721c75dc9c9812cb9ac191ffc92))
+
 ## 0.29.0 (2026-04-23)
 
 Full Changelog: [bedrock-sdk-v0.28.1...bedrock-sdk-v0.29.0](https://github.com/anthropics/anthropic-sdk-typescript/compare/bedrock-sdk-v0.28.1...bedrock-sdk-v0.29.0)

packages/bedrock-sdk/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@anthropic-ai/bedrock-sdk",
-  "version": "0.29.0",
+  "version": "0.29.1",
   "description": "The official TypeScript library for the Anthropic Bedrock API",
   "author": "Anthropic <support@anthropic.com>",
   "types": "dist/index.d.ts",

packages/bedrock-sdk/src/core/streaming.ts

@@ -63,7 +63,7 @@ export class Stream<Item> extends CoreStream<Item> {
       }
     }
 
-    // Note: this function is copied entirely from the core SDK
+    // Note: this function is adapted from the core SDK
     async function* iterator(): AsyncIterator<Item, any, undefined> {
       if (consumed) {
         throw new Error('Cannot iterate over a consumed stream, use `.tee()` to split the stream.');
@@ -73,13 +73,19 @@ export class Stream<Item> extends CoreStream<Item> {
       try {
         for await (const sse of iterMessages()) {
           if (sse.event === 'chunk') {
+            let parsed;
             try {
-              yield JSON.parse(sse.data);
+              parsed = JSON.parse(sse.data);
             } catch (e) {
               logger.error(`Could not parse message into JSON:`, sse.data);
               logger.error(`From chunk:`, sse.raw);
               throw e;
             }
+            if (parsed && typeof parsed === 'object' && parsed.type === 'error') {
+              // Anthropic-format error delivered inside a Bedrock chunk frame
+              throw new APIError(undefined, parsed, undefined, response.headers, parsed.error?.type);
+            }
+            yield parsed;
           }
 
           if (sse.event === 'error') {

packages/bedrock-sdk/tests/streaming.test.ts

@@ -0,0 +1,59 @@
+import { Readable } from 'node:stream';
+import { EventStreamMarshaller } from '@smithy/eventstream-serde-node';
+import { APIError } from '@anthropic-ai/sdk';
+import { Stream, fromUtf8, toUtf8 } from '../src/core/streaming';
+
+function encodeChunkFrame(payload: unknown): ReadableStream {
+  const marshaller = new EventStreamMarshaller({ utf8Encoder: toUtf8, utf8Decoder: fromUtf8 });
+  const inner = JSON.stringify(payload);
+  const body = fromUtf8(JSON.stringify({ bytes: Buffer.from(inner).toString('base64') }));
+  const serialized = marshaller.serialize(
+    (async function* () {
+      yield {
+        headers: {
+          ':message-type': { type: 'string', value: 'event' },
+          ':event-type': { type: 'string', value: 'chunk' },
+          ':content-type': { type: 'string', value: 'application/json' },
+        },
+        body,
+      };
+    })(),
+    (msg: any) => msg,
+  );
+  return Readable.toWeb(Readable.from(serialized)) as ReadableStream;
+}
+
+describe('Bedrock Stream.fromSSEResponse', () => {
+  test('throws APIError when a chunk frame contains an Anthropic error payload', async () => {
+    const response = new Response(
+      encodeChunkFrame({ type: 'error', error: { type: 'overloaded_error', message: 'test' } }),
+    );
+    const stream = Stream.fromSSEResponse(response, new AbortController());
+
+    let caught: unknown;
+    try {
+      for await (const _ of stream) {
+        // consume
+      }
+    } catch (e) {
+      caught = e;
+    }
+
+    expect(caught).toBeInstanceOf(APIError);
+    expect(String(caught)).not.toContain('Unexpected event order');
+    expect((caught as APIError).type).toBe('overloaded_error');
+  });
+
+  test('yields normal chunk payloads unchanged', async () => {
+    const response = new Response(
+      encodeChunkFrame({ type: 'message_start', message: { id: 'msg_1', role: 'assistant' } }),
+    );
+    const stream = Stream.fromSSEResponse<any>(response, new AbortController());
+
+    const events: any[] = [];
+    for await (const ev of stream) events.push(ev);
+
+    expect(events).toHaveLength(1);
+    expect(events[0].type).toBe('message_start');
+  });
+});

packages/vertex-sdk/yarn.lock

@@ -17,7 +17,7 @@
 
 "@anthropic-ai/sdk@file:../../dist":
   # x-release-please-start-version
-  version "0.91.1"
+  version "0.92.0"
   # x-release-please-end-version
   dependencies:
     json-schema-to-ts "^3.1.1"

scripts/fast-format

@@ -31,8 +31,7 @@ if ! [ -z "$ESLINT_FILES" ]; then
 fi
 
 echo "==> Running prettier --write"
-PRETTIER_FILES="$(grep '\.\([mc]?tsx?\|[mc]?jsx?\|json\)$' "$FILE_LIST" || true)"
-if ! [ -z "$PRETTIER_FILES" ]; then
-   echo "$PRETTIER_FILES" | xargs ./node_modules/.bin/prettier \
-      --write --cache --cache-strategy metadata --no-error-on-unmatched-pattern
+if ! [ -z "$FILE_LIST" ]; then
+   cat "$FILE_LIST" | xargs ./node_modules/.bin/prettier \
+      --write --cache --cache-strategy metadata --no-error-on-unmatched-pattern --ignore-unknown
 fi

scripts/utils/postprocess-files.cjs

@@ -23,12 +23,19 @@ async function postprocess() {
 
     // strip out lib="dom", types="node", and types="react" references; these
     // are needed at build time, but would pollute the user's TS environment
-    const transformed = code.replace(
+    let transformed = code.replace(
       /^ *\/\/\/ *<reference +(lib="dom"|types="(node|react)").*?\n/gm,
       // replace with same number of characters to avoid breaking source maps
       (match) => ' '.repeat(match.length - 1) + '\n',
     );
 
+    // TypeScript's declaration emitter collapses /** @ts-ignore */ onto the same
+    // line as the type declaration, which doesn't work. So we convert to // @ts-ignore
+    // on its own line to properly suppresses errors.
+    if (file.endsWith('.d.ts') || file.endsWith('.d.mts') || file.endsWith('.d.cts')) {
+      transformed = transformed.replace(/\/\*\* @ts-ignore\b[^*]*\*\/ /gm, '// @ts-ignore\n');
+    }
+
     if (transformed !== code) {
       console.error(`wrote ${path.relative(process.cwd(), file)}`);
       await fs.promises.writeFile(file, transformed, 'utf8');

src/client.ts

@@ -413,6 +413,18 @@ export class BaseAnthropic {
     this.fetch = options.fetch ?? Shims.getDefaultFetch();
     this.#encoder = Opts.FallbackEncoder;
 
+    const customHeadersEnv = readEnv('ANTHROPIC_CUSTOM_HEADERS');
+    if (customHeadersEnv) {
+      const parsed: Record<string, string> = {};
+      for (const line of customHeadersEnv.split('\n')) {
+        const colon = line.indexOf(':');
+        if (colon >= 0) {
+          parsed[line.substring(0, colon).trim()] = line.substring(colon + 1).trim();
+        }
+      }
+      options.defaultHeaders = { ...parsed, ...options.defaultHeaders };
+    }
+
     this._options = options;
 
     this.apiKey = typeof apiKey === 'string' ? apiKey : null;

src/resources/beta/environments.ts

@@ -214,7 +214,7 @@ export interface BetaCloudConfigParams {
 }
 
 /**
- * Unified Environment resource for both cloud and BYOC environments.
+ * Unified Environment resource for both cloud and self-hosted environments.
  */
 export interface BetaEnvironment {
   /**

src/resources/beta/index.ts

@@ -177,6 +177,7 @@ export {
   type BetaInputJSONDelta,
   type BetaInputTokensClearAtLeast,
   type BetaInputTokensTrigger,
+  type BetaIterationsUsage,
   type BetaJSONOutputFormat,
   type BetaMCPToolConfig,
   type BetaMCPToolDefaultConfig,