release: 0.3.0 (#3)

* feat(api): manual updates

* codegen metadata

* feat(api): manual updates

* feat(api): manual updates

* feat(api): manual updates

* feat(api): manual updates

* feat(api): manual updates

* feat(api): manual updates

* feat(api): manual updates

* codegen metadata

* feat(api): manual updates

* feat(api): manual updates

* feat(api): manual updates

* docs: add more examples

* feat: [STG-1053] [server] Use fastify-zod-openapi + zod v4 for openapi generation

* codegen metadata

* codegen metadata

* release: 0.3.0

---------

Co-authored-by: stainless-app[bot] <142633134+stainless-app[bot]@users.noreply.github.com>

Author: stainless-app[bot]

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "0.2.0"
+  ".": "0.3.0"
 }

.stats.yml

@@ -1,4 +1,4 @@
 configured_endpoints: 7
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/browserbase%2Fstagehand-705638ac8966569986bd9ebb7c9761bf0016909e9f2753e77ceabb12c8049511.yml
-openapi_spec_hash: a8fbbcaa38e91c7f97313620b42d8d62
-config_hash: a35b56eb05306a0f02e83c11d57f975f
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/browserbase%2Fstagehand-ed52466945f2f8dfd3814a29e948d7bf30af7b76a7a7689079c03b8baf64e26f.yml
+openapi_spec_hash: 5d57aaf2362b0d882372dbf76477ba23
+config_hash: 989ddfee371586e9156b4d484ec0a6cc

CHANGELOG.md

@@ -1,5 +1,29 @@
 # Changelog
 
+## 0.3.0 (2025-12-23)
+
+Full Changelog: [v0.2.0...v0.3.0](https://github.com/browserbase/stagehand-java/compare/v0.2.0...v0.3.0)
+
+### Features
+
+* [STG-1053] [server] Use fastify-zod-openapi + zod v4 for openapi generation ([9de17a2](https://github.com/browserbase/stagehand-java/commit/9de17a2552f759f6e8f37de4c3b9bb5d403edcc4))
+* **api:** manual updates ([d9e462c](https://github.com/browserbase/stagehand-java/commit/d9e462c24ed6d3e165a5873e7f70f011d768500a))
+* **api:** manual updates ([b6bdf1a](https://github.com/browserbase/stagehand-java/commit/b6bdf1a26a45556dcfee59b088983cd7e7839f43))
+* **api:** manual updates ([9b6860a](https://github.com/browserbase/stagehand-java/commit/9b6860a4f60d1a740fbb026eef291e40fb8e1845))
+* **api:** manual updates ([28f7978](https://github.com/browserbase/stagehand-java/commit/28f7978e1f040169dbb20aa68efb8e5ceb9a34d2))
+* **api:** manual updates ([07db616](https://github.com/browserbase/stagehand-java/commit/07db616b7209716efa346035d65f5d7bf616c992))
+* **api:** manual updates ([3cf2073](https://github.com/browserbase/stagehand-java/commit/3cf20739785134610aa7bcbdbce3215c3c3a9970))
+* **api:** manual updates ([adace53](https://github.com/browserbase/stagehand-java/commit/adace53fc3e4a0fb4b866172aec98519ec0f29d5))
+* **api:** manual updates ([dd65420](https://github.com/browserbase/stagehand-java/commit/dd65420fecb521fba36cbf2a623ce675973a27a0))
+* **api:** manual updates ([067c9e6](https://github.com/browserbase/stagehand-java/commit/067c9e644940fa3671665a902bc605b8e358473f))
+* **api:** manual updates ([d7aabe3](https://github.com/browserbase/stagehand-java/commit/d7aabe36f42d8344477f2f468bd3ba15837c0516))
+* **api:** manual updates ([13074f1](https://github.com/browserbase/stagehand-java/commit/13074f11bbc12057b60e89f37f850ca8f5bc7a83))
+
+
+### Documentation
+
+* add more examples ([54eba34](https://github.com/browserbase/stagehand-java/commit/54eba3455dbfc5dd61c1c3b88aedd34c56bce37a))
+
 ## 0.2.0 (2025-12-16)
 
 Full Changelog: [v0.1.0...v0.2.0](https://github.com/browserbase/stagehand-java/compare/v0.1.0...v0.2.0)

README.md

@@ -2,8 +2,8 @@
 
 <!-- x-release-please-start-version -->
 
-[![Maven Central](https://img.shields.io/maven-central/v/com.browserbase.api/stagehand-java)](https://central.sonatype.com/artifact/com.browserbase.api/stagehand-java/0.2.0)
-[![javadoc](https://javadoc.io/badge2/com.browserbase.api/stagehand-java/0.2.0/javadoc.svg)](https://javadoc.io/doc/com.browserbase.api/stagehand-java/0.2.0)
+[![Maven Central](https://img.shields.io/maven-central/v/com.browserbase.api/stagehand-java)](https://central.sonatype.com/artifact/com.browserbase.api/stagehand-java/0.3.0)
+[![javadoc](https://javadoc.io/badge2/com.browserbase.api/stagehand-java/0.3.0/javadoc.svg)](https://javadoc.io/doc/com.browserbase.api/stagehand-java/0.3.0)
 
 <!-- x-release-please-end -->
 
@@ -13,7 +13,7 @@ It is generated with [Stainless](https://www.stainless.com/).
 
 <!-- x-release-please-start-version -->
 
-The REST API documentation can be found on [docs.stagehand.dev](https://docs.stagehand.dev). Javadocs are available on [javadoc.io](https://javadoc.io/doc/com.browserbase.api/stagehand-java/0.2.0).
+The REST API documentation can be found on [docs.stagehand.dev](https://docs.stagehand.dev). Javadocs are available on [javadoc.io](https://javadoc.io/doc/com.browserbase.api/stagehand-java/0.3.0).
 
 <!-- x-release-please-end -->
 
@@ -24,7 +24,7 @@ The REST API documentation can be found on [docs.stagehand.dev](https://docs.sta
 ### Gradle
 
 ```kotlin
-implementation("com.browserbase.api:stagehand-java:0.2.0")
+implementation("com.browserbase.api:stagehand-java:0.3.0")
 ```
 
 ### Maven
@@ -33,7 +33,7 @@ implementation("com.browserbase.api:stagehand-java:0.2.0")
 <dependency>
   <groupId>com.browserbase.api</groupId>
   <artifactId>stagehand-java</artifactId>
-  <version>0.2.0</version>
+  <version>0.3.0</version>
 </dependency>
 ```
 
@@ -56,7 +56,7 @@ import com.browserbase.api.models.sessions.SessionActResponse;
 StagehandClient client = StagehandOkHttpClient.fromEnv();
 
 SessionActParams params = SessionActParams.builder()
-    .sessionId("00000000-your-session-id-000000000000")
+    .id("00000000-your-session-id-000000000000")
     .input("click the first link on the page")
     .build();
 SessionActResponse response = client.sessions().act(params);
@@ -162,7 +162,7 @@ import java.util.concurrent.CompletableFuture;
 StagehandClient client = StagehandOkHttpClient.fromEnv();
 
 SessionActParams params = SessionActParams.builder()
-    .sessionId("00000000-your-session-id-000000000000")
+    .id("00000000-your-session-id-000000000000")
     .input("click the first link on the page")
     .build();
 CompletableFuture<SessionActResponse> response = client.async().sessions().act(params);
@@ -182,14 +182,106 @@ import java.util.concurrent.CompletableFuture;
 StagehandClientAsync client = StagehandOkHttpClientAsync.fromEnv();
 
 SessionActParams params = SessionActParams.builder()
-    .sessionId("00000000-your-session-id-000000000000")
+    .id("00000000-your-session-id-000000000000")
     .input("click the first link on the page")
     .build();
 CompletableFuture<SessionActResponse> response = client.sessions().act(params);
 ```
 
 The asynchronous client supports the same options as the synchronous one, except most methods return `CompletableFuture`s.
 
+## Streaming
+
+The SDK defines methods that return response "chunk" streams, where each chunk can be individually processed as soon as it arrives instead of waiting on the full response. Streaming methods generally correspond to [SSE](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events) or [JSONL](https://jsonlines.org) responses.
+
+Some of these methods may have streaming and non-streaming variants, but a streaming method will always have a `Streaming` suffix in its name, even if it doesn't have a non-streaming variant.
+
+These streaming methods return [`StreamResponse`](stagehand-java-core/src/main/kotlin/com/browserbase/api/core/http/StreamResponse.kt) for synchronous clients:
+
+```java
+import com.browserbase.api.core.http.StreamResponse;
+import com.browserbase.api.models.sessions.StreamEvent;
+
+try (StreamResponse<StreamEvent> streamResponse = client.sessions().actStreaming(params)) {
+    streamResponse.stream().forEach(chunk -> {
+        System.out.println(chunk);
+    });
+    System.out.println("No more chunks!");
+}
+```
+
+Or [`AsyncStreamResponse`](stagehand-java-core/src/main/kotlin/com/browserbase/api/core/http/AsyncStreamResponse.kt) for asynchronous clients:
+
+```java
+import com.browserbase.api.core.http.AsyncStreamResponse;
+import com.browserbase.api.models.sessions.StreamEvent;
+import java.util.Optional;
+
+client.async().sessions().actStreaming(params).subscribe(chunk -> {
+    System.out.println(chunk);
+});
+
+// If you need to handle errors or completion of the stream
+client.async().sessions().actStreaming(params).subscribe(new AsyncStreamResponse.Handler<>() {
+    @Override
+    public void onNext(StreamEvent chunk) {
+        System.out.println(chunk);
+    }
+
+    @Override
+    public void onComplete(Optional<Throwable> error) {
+        if (error.isPresent()) {
+            System.out.println("Something went wrong!");
+            throw new RuntimeException(error.get());
+        } else {
+            System.out.println("No more chunks!");
+        }
+    }
+});
+
+// Or use futures
+client.async().sessions().actStreaming(params)
+    .subscribe(chunk -> {
+        System.out.println(chunk);
+    })
+    .onCompleteFuture();
+    .whenComplete((unused, error) -> {
+        if (error != null) {
+            System.out.println("Something went wrong!");
+            throw new RuntimeException(error);
+        } else {
+            System.out.println("No more chunks!");
+        }
+    });
+```
+
+Async streaming uses a dedicated per-client cached thread pool [`Executor`](https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Executor.html) to stream without blocking the current thread. This default is suitable for most purposes.
+
+To use a different `Executor`, configure the subscription using the `executor` parameter:
+
+```java
+import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
+
+Executor executor = Executors.newFixedThreadPool(4);
+client.async().sessions().actStreaming(params).subscribe(
+    chunk -> System.out.println(chunk), executor
+);
+```
+
+Or configure the client globally using the `streamHandlerExecutor` method:
+
+```java
+import com.browserbase.api.client.StagehandClient;
+import com.browserbase.api.client.okhttp.StagehandOkHttpClient;
+import java.util.concurrent.Executors;
+
+StagehandClient client = StagehandOkHttpClient.builder()
+    .fromEnv()
+    .streamHandlerExecutor(Executors.newFixedThreadPool(4))
+    .build();
+```
+
 ## Raw responses
 
 The SDK defines methods that deserialize responses into instances of Java classes. However, these methods don't provide access to the response headers, status code, or the raw response body.
@@ -203,8 +295,7 @@ import com.browserbase.api.models.sessions.SessionStartParams;
 import com.browserbase.api.models.sessions.SessionStartResponse;
 
 SessionStartParams params = SessionStartParams.builder()
-    .browserbaseApiKey("your Browserbase API key")
-    .browserbaseProjectId("your Browserbase Project ID")
+    .modelName("openai/gpt-5-nano")
     .build();
 HttpResponseFor<SessionStartResponse> response = client.sessions().withRawResponse().start(params);
 
@@ -237,6 +328,8 @@ The SDK throws custom unchecked exception types:
   | 5xx    | [`InternalServerException`](stagehand-java-core/src/main/kotlin/com/browserbase/api/errors/InternalServerException.kt)             |
   | others | [`UnexpectedStatusCodeException`](stagehand-java-core/src/main/kotlin/com/browserbase/api/errors/UnexpectedStatusCodeException.kt) |
 
+  [`SseException`](stagehand-java-core/src/main/kotlin/com/browserbase/api/errors/SseException.kt) is thrown for errors encountered during [SSE streaming](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events) after a successful initial HTTP response.
+
 - [`StagehandIoException`](stagehand-java-core/src/main/kotlin/com/browserbase/api/errors/StagehandIoException.kt): I/O networking errors.
 
 - [`StagehandRetryableException`](stagehand-java-core/src/main/kotlin/com/browserbase/api/errors/StagehandRetryableException.kt): Generic error indicating a failure that could be retried by the client.
@@ -505,8 +598,8 @@ import com.browserbase.api.core.JsonMissing;
 import com.browserbase.api.models.sessions.SessionActParams;
 
 SessionActParams params = SessionActParams.builder()
-    .input("click the sign in button")
-    .sessionId(JsonMissing.of())
+    .input("Click the login button")
+    .id(JsonMissing.of())
     .build();
 ```
 

build.gradle.kts

@@ -9,7 +9,7 @@ repositories {
 
 allprojects {
     group = "com.browserbase.api"
-    version = "0.2.0" // x-release-please-version
+    version = "0.3.0" // x-release-please-version
 }
 
 subprojects {

stagehand-java-client-okhttp/src/main/kotlin/com/browserbase/api/client/okhttp/StagehandOkHttpClient.kt

@@ -7,6 +7,7 @@ import com.browserbase.api.client.StagehandClientImpl
 import com.browserbase.api.core.ClientOptions
 import com.browserbase.api.core.Sleeper
 import com.browserbase.api.core.Timeout
+import com.browserbase.api.core.http.AsyncStreamResponse
 import com.browserbase.api.core.http.Headers
 import com.browserbase.api.core.http.HttpClient
 import com.browserbase.api.core.http.QueryParams
@@ -16,6 +17,7 @@ import java.net.Proxy
 import java.time.Clock
 import java.time.Duration
 import java.util.Optional
+import java.util.concurrent.Executor
 import javax.net.ssl.HostnameVerifier
 import javax.net.ssl.SSLSocketFactory
 import javax.net.ssl.X509TrustManager
@@ -121,6 +123,17 @@ class StagehandOkHttpClient private constructor() {
          */
         fun jsonMapper(jsonMapper: JsonMapper) = apply { clientOptions.jsonMapper(jsonMapper) }
 
+        /**
+         * The executor to use for running [AsyncStreamResponse.Handler] callbacks.
+         *
+         * Defaults to a dedicated cached thread pool.
+         *
+         * This class takes ownership of the executor and shuts it down, if possible, when closed.
+         */
+        fun streamHandlerExecutor(streamHandlerExecutor: Executor) = apply {
+            clientOptions.streamHandlerExecutor(streamHandlerExecutor)
+        }
+
         /**
          * The interface to use for delaying execution, like during retries.
          *

stagehand-java-client-okhttp/src/main/kotlin/com/browserbase/api/client/okhttp/StagehandOkHttpClientAsync.kt

@@ -7,6 +7,7 @@ import com.browserbase.api.client.StagehandClientAsyncImpl
 import com.browserbase.api.core.ClientOptions
 import com.browserbase.api.core.Sleeper
 import com.browserbase.api.core.Timeout
+import com.browserbase.api.core.http.AsyncStreamResponse
 import com.browserbase.api.core.http.Headers
 import com.browserbase.api.core.http.HttpClient
 import com.browserbase.api.core.http.QueryParams
@@ -16,6 +17,7 @@ import java.net.Proxy
 import java.time.Clock
 import java.time.Duration
 import java.util.Optional
+import java.util.concurrent.Executor
 import javax.net.ssl.HostnameVerifier
 import javax.net.ssl.SSLSocketFactory
 import javax.net.ssl.X509TrustManager
@@ -121,6 +123,17 @@ class StagehandOkHttpClientAsync private constructor() {
          */
         fun jsonMapper(jsonMapper: JsonMapper) = apply { clientOptions.jsonMapper(jsonMapper) }
 
+        /**
+         * The executor to use for running [AsyncStreamResponse.Handler] callbacks.
+         *
+         * Defaults to a dedicated cached thread pool.
+         *
+         * This class takes ownership of the executor and shuts it down, if possible, when closed.
+         */
+        fun streamHandlerExecutor(streamHandlerExecutor: Executor) = apply {
+            clientOptions.streamHandlerExecutor(streamHandlerExecutor)
+        }
+
         /**
          * The interface to use for delaying execution, like during retries.
          *