Convert OAI tool_choice to Gemini functionCallingConfig for Gemini requests (#4840) * Send toolConfig block to Gemini, if defined and tools block also present. * Convert OAI tool_choice to Gemini functionCallingConfig for Gemini requests * Remove blank line --------- Co-authored-by: Cohee <18619528+Cohee1207@users.noreply.github.com>

1f780943227ddb45ef7e855de9adb4dd8f136ec5

mightytribble <246552901+mightytribble@users.noreply.github.com>

Signed

src/endpoints/backends/chat-completions.js+28 -0 Viewed

         if (tools.length) {
             body.tools = tools;
++
 +            const toolChoice = request.body.tool_choice;
 +            let functionCallingConfig;
++
 +            // Translate OpenAI's `tool_choice` to Gemini's `functionCallingConfig`
 +            if (typeof toolChoice === 'string') {
 +                switch (toolChoice) {
 +                    case 'none':
 +                        functionCallingConfig = { mode: 'NONE' };
 +                        break;
 +                    case 'required':
 +                        functionCallingConfig = { mode: 'ANY' };
 +                        break;
 +                    case 'auto':
 +                        functionCallingConfig = { mode: 'AUTO' };
 +                        break;
 +                }
 +            } else if (typeof toolChoice === 'object' && toolChoice?.function?.name) {
 +                // Force a specific function call
 +                functionCallingConfig = {
 +                    mode: 'ANY',
 +                    allowedFunctionNames: [toolChoice.function.name],
 +                };
 +            }
++
 +            if (functionCallingConfig) {
 +                body.toolConfig = { functionCallingConfig };
 +            }
+        }
         return body;