feat: Introduce OpenAiProviderDialect for flexible request shaping and remove reasoning properties from ModelProfile

- Added OpenAiProviderDialect to manage request features for OpenAI-compatible providers.
- Refactored ChatCompletionClient and TextCompletionClient to utilize the new dialect for handling reasoning and usage settings.
- Removed reasoningEffort and reasoningSummaryDetails from ModelProfile and related services.
- Updated README to reflect changes in request shaping and dialect usage.

src/test/java/de/extio/lmlib/client/oai/completion/chat/ChatCompletionClientRequestTest.java

@@ -0,0 +1,121 @@
+package de.extio.lmlib.client.oai.completion.chat;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.math.BigDecimal;
+import java.util.List;
+
+import org.junit.jupiter.api.Test;
+
+import de.extio.lmlib.client.oai.OpenAiProviderDialect;
+import de.extio.lmlib.profile.ModelProfile;
+import de.extio.lmlib.profile.ModelProfile.ModelProvider;
+
+class ChatCompletionClientRequestTest {
+
+	@Test
+	void defaultsToAllRequestFieldsWhenNoDialectIsConfigured() {
+		final var client = new TestChatCompletionClient();
+		final var request = client.createRequest(
+				List.of(new ChatMessage("user", "hello", null)),
+				this.createProfile(),
+				false,
+				null);
+
+		assertTrue(request.getUsage());
+		assertNotNull(request.getReasoning());
+		assertEquals(ChatCompletionRequest.ChatCompletionsRequestReasoningEffort.medium, request.getReasoning().getEffort());
+		assertEquals("concise", request.getReasoning().getSummary());
+		assertEquals(2048, request.getMaxCompletionTokens());
+	}
+
+	@Test
+	void omitsDialectDisabledRequestFields() {
+		final var client = new TestChatCompletionClient();
+		client.setDialect(new OpenAiProviderDialect() {
+			@Override
+			public boolean sendUsage(final ModelProfile modelProfile) {
+				return false;
+			}
+
+			@Override
+			public boolean sendReasoning(final ModelProfile modelProfile) {
+				return false;
+			}
+
+			@Override
+			public boolean sendMaxCompletionTokens(final ModelProfile modelProfile) {
+				return false;
+			}
+		});
+
+		final var request = client.createRequest(
+				List.of(new ChatMessage("user", "hello", null)),
+				this.createProfile(),
+				false,
+				null);
+
+		assertNull(request.getUsage());
+		assertNull(request.getReasoning());
+		assertNull(request.getMaxCompletionTokens());
+		assertEquals(2048, request.getMaxTokens());
+		assertFalse(request.isStream());
+	}
+
+	@Test
+	void usesDialectProvidedReasoningDefaults() {
+		final var client = new TestChatCompletionClient();
+		client.setDialect(new OpenAiProviderDialect() {
+			@Override
+			public String reasoningEffort(final ModelProfile modelProfile) {
+				return "high";
+			}
+
+			@Override
+			public String reasoningSummaryDetails(final ModelProfile modelProfile) {
+				return "detailed";
+			}
+		});
+
+		final var request = client.createRequest(
+				List.of(new ChatMessage("user", "hello", null)),
+				this.createProfile(),
+				false,
+				null);
+
+		assertNotNull(request.getReasoning());
+		assertEquals(ChatCompletionRequest.ChatCompletionsRequestReasoningEffort.high, request.getReasoning().getEffort());
+		assertEquals("detailed", request.getReasoning().getSummary());
+	}
+
+	private ModelProfile createProfile() {
+		return new ModelProfile(
+				"",
+				"fallback",
+				"cl100k_base",
+				2048,
+				8192,
+				0.4,
+				1.0,
+				ModelProvider.OAI_CHAT_COMPLETION,
+				"test-model",
+				"http://localhost:5001",
+				"",
+				BigDecimal.ZERO,
+				BigDecimal.ZERO,
+				BigDecimal.ZERO,
+				BigDecimal.ZERO,
+				"TEST");
+	}
+
+	private static final class TestChatCompletionClient extends ChatCompletionClient {
+
+		private void setDialect(final OpenAiProviderDialect openAiProviderDialect) {
+			this.openAiProviderDialect = openAiProviderDialect;
+		}
+	}
+}

src/test/java/de/extio/lmlib/client/oai/completion/text/TextCompletionClientRequestTest.java

@@ -0,0 +1,65 @@
+package de.extio.lmlib.client.oai.completion.text;
+
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.math.BigDecimal;
+
+import org.junit.jupiter.api.Test;
+
+import de.extio.lmlib.client.oai.OpenAiProviderDialect;
+import de.extio.lmlib.profile.ModelProfile;
+import de.extio.lmlib.profile.ModelProfile.ModelProvider;
+
+class TextCompletionClientRequestTest {
+
+	@Test
+	void defaultsToUsageWhenNoDialectIsConfigured() {
+		final var client = new TestTextCompletionClient();
+		final var request = client.createRequest("prompt", this.createProfile(), false);
+
+		assertTrue(request.getUsage());
+	}
+
+	@Test
+	void omitsUsageWhenDialectDisablesIt() {
+		final var client = new TestTextCompletionClient();
+		client.setDialect(new OpenAiProviderDialect() {
+			@Override
+			public boolean sendUsage(final ModelProfile modelProfile) {
+				return false;
+			}
+		});
+
+		final var request = client.createRequest("prompt", this.createProfile(), false);
+
+		assertNull(request.getUsage());
+	}
+
+	private ModelProfile createProfile() {
+		return new ModelProfile(
+				"gpt-oss",
+				"fallback",
+				"cl100k_base",
+				2048,
+				8192,
+				0.4,
+				1.0,
+				ModelProvider.OAI_TEXT_COMPLETION,
+				"test-model",
+				"http://localhost:5001",
+				"",
+				BigDecimal.ZERO,
+				BigDecimal.ZERO,
+				BigDecimal.ZERO,
+				BigDecimal.ZERO,
+				"TEST");
+	}
+
+	private static final class TestTextCompletionClient extends TextCompletionClient {
+
+		private void setDialect(final OpenAiProviderDialect openAiProviderDialect) {
+			this.openAiProviderDialect = openAiProviderDialect;
+		}
+	}
+}

src/test/java/de/extio/lmlib/token/TokenizerResolverTest.java

@@ -55,8 +55,6 @@ public class TokenizerResolverTest {
 				BigDecimal.ZERO,
 				BigDecimal.ZERO,
 				BigDecimal.ZERO,
-				null,
-				null,
 				"TEST");
 	}