docs: clarify that AWS Bedrock requires the optional AWS SDK plugin

README.md

@@ -305,6 +305,7 @@ This allows you to manage the plugin configuration alongside your other Jenkins
 - **Note**: Claude Opus 4.7 and newer models have deprecated the `temperature` parameter. See [model deprecations](https://platform.claude.com/docs/en/about-claude/model-deprecations) for migration details.
 
 ### AWS Bedrock
+- **Requires**: the [AWS SDK 2.x](https://plugins.jenkins.io/aws-java-sdk2/) plugin (`aws-java-sdk2-core`). This dependency is intentionally **optional** so installations that don't use Bedrock are not forced to carry the AWS SDK. As a result, **AWS Bedrock appears in the AI Provider list only after you install that plugin**. To enable it: **Manage Jenkins → Plugins → Available plugins**, search for `AWS SDK`, install the AWS SDK 2.x plugin, and restart Jenkins.
 - **Models**: `anthropic.claude-3-5-sonnet-20240620-v1:0`, `eu.anthropic.claude-3-5-sonnet-20240620-v1:0` (EU cross-region), `meta.llama3-8b-instruct-v1:0`, `us.amazon.nova-lite-v1:0`, etc.
 - **API Key**: Not required — uses AWS credential chain (instance profiles, environment variables, etc.)
 - **Region**: AWS region (e.g., `us-east-1`, `eu-west-1`). Optional — defaults to AWS SDK region resolution

src/test/java/io/jenkins/plugins/explain_error/provider/BedrockProviderRegistrationTest.java

@@ -0,0 +1,31 @@
+package io.jenkins.plugins.explain_error.provider;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+import org.jvnet.hudson.test.JenkinsRule;
+import org.jvnet.hudson.test.junit.jupiter.WithJenkins;
+
+/**
+ * Guards that the AWS Bedrock provider is wired up as a selectable AI provider
+ * when its dependency is available.
+ *
+ * <p>The System configuration dropdown is populated by descriptor discovery over
+ * {@link BaseAIProvider}. The Bedrock descriptor is registered only when the
+ * {@code aws-java-sdk2-core} plugin is present — an intentionally optional
+ * dependency, so instances that do not use Bedrock are not forced to carry the
+ * AWS SDK. The test harness provides that dependency, so this test verifies the
+ * descriptor is correctly registered (via {@code @OptionalExtension} and
+ * {@code @Symbol}) whenever the AWS SDK plugin is installed.
+ */
+@WithJenkins
+class BedrockProviderRegistrationTest {
+
+    @Test
+    void bedrockProviderIsSelectable(JenkinsRule jenkins) {
+        boolean registered = jenkins.jenkins.getDescriptorList(BaseAIProvider.class).stream()
+                .anyMatch(descriptor -> descriptor instanceof BedrockProvider.DescriptorImpl);
+        assertTrue(registered,
+                "AWS Bedrock provider descriptor must be registered and selectable in the AI Provider list");
+    }
+}