Fixed opanai early termination from tool calls

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@ztimson/ai-utils",
-	"version": "1.6.8",
+	"version": "1.6.10",
 	"description": "AI Utility library",
 	"author": "Zak Timson",
 	"license": "MIT",

src/open-ai.ts

@@ -98,18 +98,21 @@ export class OpenAi extends LLMProvider {
 						throw err;
 					});
 
-					let usage: any, msg: any = {content: '', tool_calls: []};
+					let usage: any, finishReason: string | undefined, msg: any = {content: '', tool_calls: []};
 					if(options.stream) {
 						for await (const chunk of resp) {
 							if(controller.signal.aborted) break;
 							if(chunk.usage) usage = chunk.usage;
+							if(chunk.choices[0]?.finish_reason) finishReason = chunk.choices[0].finish_reason;
 							if(chunk.choices[0]?.delta?.content) {
 								msg.content += chunk.choices[0].delta.content;
 								options.stream({text: chunk.choices[0].delta.content});
 							}
 							if(chunk.choices[0]?.delta?.tool_calls) {
 								for(const deltaTC of chunk.choices[0].delta.tool_calls) {
-									const existing = msg.tool_calls.find((tc: any) => tc.index === deltaTC.index);
+									const existing = deltaTC.index != null
+										? msg.tool_calls.find((tc: any) => tc.index === deltaTC.index)
+										: (deltaTC.id ? msg.tool_calls.find((tc: any) => tc.id === deltaTC.id) : undefined);
 									if(existing) {
 										if(deltaTC.id) existing.id = deltaTC.id;
 										if(deltaTC.function?.name) existing.function.name = deltaTC.function.name;
@@ -126,11 +129,21 @@ export class OpenAi extends LLMProvider {
 						}
 					} else {
 						usage = resp.usage;
+						finishReason = resp.choices[0].finish_reason;
 						msg = resp.choices[0].message;
 					}
 					const duration = Date.now() - callStart;
 					const tps = usage?.completion_tokens && duration > 0 ? usage.completion_tokens / (duration / 1000) : 0;
 
+					if(finishReason === 'length' && !controller.signal.aborted) {
+						if(msg.content?.trim()) history.push({role: 'assistant', content: msg.content.trim(), timestamp: Date.now(), duration, tps});
+						throw new Error(`[OpenAI] Response hit token limit before completing`);
+					}
+
+					if(!finishReason && !controller.signal.aborted) {
+						throw new Error('[OpenAI] Stream ended prematurely - connection likely dropped');
+					}
+
 					const toolCalls = msg.tool_calls || [];
 					if(toolCalls.length && !controller.signal.aborted) {
 						if(msg.content?.trim()) history.push({role: 'assistant', content: msg.content.trim(), timestamp: Date.now(), duration, tps});
@@ -147,7 +160,7 @@ export class OpenAi extends LLMProvider {
 							if(!tool) { entry.error = 'Tool not found'; return; }
 							try {
 								const toolStream = options.stream && ((chunk: any) => {
-									if(chunk.done) { terminal = true; return; }
+									if(chunk.done) return;
 									options.stream!(chunk);
 								});
 								const result = await tool.fn(entry.args, toolStream, this.ai, tc.id);