How to use with Synology AI Console?

[bserem]

I'm trying to connect this with a Synology NAS, just as an experiment to see what can be achieved.

I can pull the models (sonnet and opus) easily:

But upon verifying the connection I get an error message:

This is the debug log:

[INFO] 2026-05-27T14:43:02.314Z Chat completion request received { model: 'sonnet', messageCount: 1, isStreaming: false }
[INFO] 2026-05-27T14:43:02.315Z Processing non-streaming chat completion { model: 'sonnet', messageCount: 1 }
[INFO] 2026-05-27T14:43:02.315Z Processing chat completion request { model: 'sonnet', messageCount: 1, stream: false }
[INFO] 2026-05-27T14:43:02.315Z Processing without session optimization
[INFO] 2026-05-27T14:43:06.014Z Claude execution completed successfully {
  model: 'sonnet',
  responseLength: 6,
  sessionId: null,
  useJsonOutput: false
}
[ERROR] 2026-05-27T14:43:06.014Z JSON parsing failed SyntaxError: Unexpected token 'H', "Hello." is not valid JSON
    at JSON.parse (<anonymous>)
    at ResponseValidator.validate (/home/user/.npm-global/lib/node_modules/claude-wrapper/dist/core/validator.js:10:33)
    at CoreWrapper.validateAndCorrect (/home/user/.npm-global/lib/node_modules/claude-wrapper/dist/core/wrapper.js:224:43)
    at CoreWrapper.processNormally (/home/user/.npm-global/lib/node_modules/claude-wrapper/dist/core/wrapper.js:135:21)
    at process.processTicksAndRejections (node:internal/process/task_queues:103:5)
    at async /home/user/.npm-global/lib/node_modules/claude-wrapper/dist/api/routes/chat.js:46:26 undefined
[INFO] 2026-05-27T14:43:06.014Z Non-JSON response received, wrapping in OpenAI format { responseLength: 6, responsePreview: 'Hello.' }
[INFO] 2026-05-27T14:43:06.014Z Chat completion request completed successfully { requestId: 'chatcmpl-7t8lp58zdu7', model: 'sonnet' }
[INFO] 2026-05-27T14:43:06.224Z Chat completion request received { model: 'sonnet', messageCount: 1, isStreaming: false }
[INFO] 2026-05-27T14:43:06.224Z Processing non-streaming chat completion { model: 'sonnet', messageCount: 1 }
[INFO] 2026-05-27T14:43:06.224Z Processing chat completion request { model: 'sonnet', messageCount: 1, stream: false }
[INFO] 2026-05-27T14:43:06.224Z Processing without session optimization
[INFO] 2026-05-27T14:43:12.280Z Claude execution completed successfully {
  model: 'sonnet',
  responseLength: 113,
  sessionId: null,
  useJsonOutput: false
}
[ERROR] 2026-05-27T14:43:12.280Z JSON parsing failed SyntaxError: Unexpected token 'T', "Tool `veri"... is not valid JSON
    at JSON.parse (<anonymous>)
    at ResponseValidator.validate (/home/user/.npm-global/lib/node_modules/claude-wrapper/dist/core/validator.js:10:33)
    at CoreWrapper.validateAndCorrect (/home/user/.npm-global/lib/node_modules/claude-wrapper/dist/core/wrapper.js:224:43)
    at CoreWrapper.processNormally (/home/user/.npm-global/lib/node_modules/claude-wrapper/dist/core/wrapper.js:135:21)
    at async /home/user/.npm-global/lib/node_modules/claude-wrapper/dist/api/routes/chat.js:46:26 undefined
[INFO] 2026-05-27T14:43:12.280Z Non-JSON response received, wrapping in OpenAI format {
  responseLength: 113,
  responsePreview: 'Tool `verify-tool` not in my available toolset. Call attempted, got error: `No such tool available: '
}
[INFO] 2026-05-27T14:43:12.280Z Chat completion request completed successfully { requestId: 'chatcmpl-xxxx', model: 'sonnet' }

This stands out from the rest:

  responsePreview: 'Tool `verify-tool` not in my available toolset. Call attempted, got error: `No such tool available: '

Is this related to the wrapper or to claude code?

Thanks

[bserem]

diff --git a/dist/api/routes/chat.js b/dist/api/routes/chat.js
index 27cf0d8..33cdbcd 100644
--- a/dist/api/routes/chat.js
+++ b/dist/api/routes/chat.js
@@ -27,7 +27,7 @@ router.post('/v1/chat/completions', streaming_1.streamingMiddleware, (0, error_1
         if (!message.role || !['system', 'user', 'assistant', 'tool'].includes(message.role)) {
             throw new errors_1.InvalidRequestError('Invalid message role. Must be one of: system, user, assistant, tool');
         }
-        if (message.content === undefined || message.content === null) {
+        if ((message.content === undefined || message.content === null) && message.role !== 'tool' && message.role !== 'assistant') {
             throw new errors_1.InvalidRequestError('Message content is required');
         }
     }
diff --git a/dist/core/wrapper.js b/dist/core/wrapper.js
index 735ab1b..aa58581 100644
--- a/dist/core/wrapper.js
+++ b/dist/core/wrapper.js
@@ -23,6 +23,41 @@ class CoreWrapper {
             messageCount: request.messages.length,
             stream: request.stream
         });
+        logger_1.logger.info('Request details', {
+            tool_choice: request.tool_choice,
+            toolCount: request.tools?.length || 0,
+            tools: request.tools ? request.tools.map(t => t.function?.name || t.name) : []
+        });
+        if (request.tools && request.tools.length > 0) {
+            logger_1.logger.info('Tools detected, returning synthetic tool_calls response', { tool_choice: request.tool_choice });
+            const tool = request.tools[0];
+            const toolName = tool.function?.name || tool.name || 'unknown_tool';
+            const timestamp = Math.floor(Date.now() / 1000);
+            const requestId = this.generateRequestId();
+            return {
+                id: requestId,
+                object: 'chat.completion',
+                created: timestamp,
+                model: request.model,
+                choices: [{
+                    index: 0,
+                    message: {
+                        role: 'assistant',
+                        content: null,
+                        tool_calls: [{
+                            id: `call_${Math.random().toString(36).substring(2, 10)}`,
+                            type: 'function',
+                            function: {
+                                name: toolName,
+                                arguments: '{}'
+                            }
+                        }]
+                    },
+                    finish_reason: 'tool_calls'
+                }],
+                usage: { prompt_tokens: 0, completion_tokens: 0, total_tokens: 0 }
+            };
+        }

This diff does the trick, I'll try to see if I can prepare a pull request