fix(llm): support Azure unified OpenAI endpoints

Prevent legacy Azure URL rewriting on unified /openai/v1 endpoints and remove orphan tool options from requests without tools. Preserve tool_choice none when tools are present.

mateclaw-server/src/main/java/vip/mate/llm/chatmodel/OpenAiCompatibleChatModelBuilder.java

@@ -75,10 +75,21 @@ public class OpenAiCompatibleChatModelBuilder implements ChatModelBuilder {
                 chain.request().newBuilder().removeHeader("Authorization").build()));
         observed.interceptor(interceptor);
         PinnedOpenAiHttpClient transport = new PinnedOpenAiHttpClient(observed.build());
-        ClientOptions clientOptions = ClientOptions.builder().httpClient(transport).baseUrl(baseUrl)
+        ClientOptions.Builder clientOptions = ClientOptions.builder().httpClient(transport).baseUrl(baseUrl)
            .apiKey(authenticated ? options.getApiKey() : "mateclaw-keyless-placeholder")
-                .timeout(options.getTimeout()).maxRetries(0).build();
+           .timeout(options.getTimeout()).maxRetries(0);
-        OpenAIClientImpl sdk = new OpenAIClientImpl(clientOptions);
+        /*
+        * fix：https://github.com/mateaix/mateclaw/issues/640
+        * Azure unified (/openai/v1) base URLs must not be downgraded by the SDK:
+        * with the default AUTO mode openai-java classifies *.openai.azure.com hosts
+        * as AZURE_LEGACY (our /v1-stripped baseUrl never ends in /openai/v1), rewrites
+        * request paths to /openai/deployments/{model} and appends a default
+        * api-version query — both wrong for the v1 surface the operator configured.
+        */
+        if (isAzureUnifiedBaseUrl(provider.getBaseUrl())) {
+            clientOptions.azureUrlPathMode(com.openai.azure.AzureUrlPathMode.UNIFIED);
+        }
+        OpenAIClientImpl sdk = new OpenAIClientImpl(clientOptions.build());
         ChatModel raw = OpenAiChatModel.builder().options(options).openAiClient(sdk).openAiClientAsync(sdk.async())
                 .observationRegistry(observations).build();
         raw = new OpenAiWirePolicyChatModel(raw, retry, transport);
@@ -263,6 +274,24 @@ public class OpenAiCompatibleChatModelBuilder implements ChatModelBuilder {
         return path;
     }
 
+    /**
+     * fix：https://github.com/mateaix/mateclaw/issues/640
+     * Whether the operator configured an Azure OpenAI resource through the unified
+     * {@code /openai/v1} surface (per Microsoft's "switching endpoints" guidance).
+     * On that surface no {@code api-version} query parameter may be sent, and the
+     * SDK must not rewrite paths into the legacy {@code /openai/deployments/{name}}
+     * form — see {@link #build(ModelConfigEntity, ModelProviderEntity, RetryTemplate)}.
+     */
+    private static boolean isAzureUnifiedBaseUrl(String rawBaseUrl) {
+        if (rawBaseUrl == null) return false;
+        String url = rawBaseUrl.trim();
+        while (url.endsWith("/") || url.endsWith("?")) {
+            url = url.substring(0, url.length() - 1);
+        }
+        return url.endsWith("/openai/v1")
+           && (url.contains("openai.azure.com") || url.contains("cognitiveservices.azure.com"));
+    }
+
     /** Defensive scrub for provider error bodies, which may echo request data. */
     static String redactAndTruncate(String body) {
         String redacted = body

mateclaw-server/src/main/java/vip/mate/llm/chatmodel/OpenAiCompatibleHttpInterceptor.java

@@ -59,8 +59,23 @@ final class OpenAiCompatibleHttpInterceptor implements Interceptor {
                 rewritten.path("messages").size(),
                 rewritten.path("tools").size(),
                 rewritten.path("stream").asBoolean());
-        HttpUrl.Builder url = HttpUrl.get(endpoint).newBuilder();
+        // fix：https://github.com/mateaix/mateclaw/issues/640
-        if (original.url().encodedQuery() != null) url.encodedQuery(original.url().encodedQuery());
+        // The endpoint (provider baseUrl + completions path) is the authoritative URL.
+        // Carry over SDK-attached query params selectively: openai-java classifies
+        // *.openai.azure.com hosts whose baseUrl does not end in /openai/v1 as
+        // AZURE_LEGACY and appends a default `api-version` query — which the unified
+        // /openai/v1 surface rejects with 400 "API version not supported". Keep
+        // `api-version` only when the endpoint itself is a legacy deployments URL,
+        // where Azure requires it.
+        HttpUrl parsedEndpoint = HttpUrl.get(endpoint);
+        boolean legacyDeploymentsEndpoint = parsedEndpoint.encodedPath().contains("/deployments/");
+        HttpUrl.Builder url = parsedEndpoint.newBuilder();
+        for (String name : original.url().queryParameterNames()) {
+            if ("api-version".equalsIgnoreCase(name) && !legacyDeploymentsEndpoint) continue;
+            for (String value : original.url().queryParameterValues(name)) {
+                url.addQueryParameter(name, value);
+            }
+        }
         Request.Builder updated =
                 original.newBuilder()
                         .url(url.build())

mateclaw-server/src/main/java/vip/mate/llm/chatmodel/OpenAiRequestRewriter.java

@@ -71,6 +71,23 @@ final class OpenAiRequestRewriter {
             ArrayNode tools = request.path("tools").isArray() ? (ArrayNode) request.get("tools") : request.putArray("tools");
             tools.addObject().put("type", "builtin_function").putObject("function").put("name", "$web_search");
         }
+        // fix：https://github.com/mateaix/mateclaw/issues/640
+        // OpenAI/Azure reject tool_choice and parallel_tool_calls on a request that
+        // carries no tools (400 "'tool_choice' is only allowed when 'tools' are
+        // specified"). Lenient gateways silently ignore the orphan fields, which is
+        // why this only surfaced on Azure. TaskFinalizationCoordinator builds
+        // finalization/summary options with cleared tool callbacks AND
+        // toolChoice("none") — that belt-and-braces only makes sense while tools
+        // actually reach the wire, so keep it when they do and drop the orphan
+        // fields when they don't. An empty tools array is itself spec-invalid
+        // ("minimum length 1"); drop it too.
+        JsonNode toolsNode = request.path("tools");
+        boolean hasTools = toolsNode.isArray() && !toolsNode.isEmpty();
+        if (toolsNode.isArray() && toolsNode.isEmpty()) request.remove("tools");
+        if (!hasTools) {
+            request.remove("tool_choice");
+            request.remove("parallel_tool_calls");
+        }
         return request;
     }
 }