From d29c0ca389c9e6f01e663dc30c38744487d0fdd0 Mon Sep 17 00:00:00 2001
From: ztimson <zaktimson@gmail.com>
Date: Fri, 18 Sep 2026 02:15:02 -0400
Subject: [PATCH] Fixed opanai early termination from tool calls

---
 package.json   |  2 +-
 src/open-ai.ts | 10 ++++++++--
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/package.json b/package.json
index 29ff173..bdc4341 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@ztimson/ai-utils",
-	"version": "1.6.8",
+	"version": "1.6.9",
 	"description": "AI Utility library",
 	"author": "Zak Timson",
 	"license": "MIT",
diff --git a/src/open-ai.ts b/src/open-ai.ts
index 97baeb6..c507b96 100644
--- a/src/open-ai.ts
+++ b/src/open-ai.ts
@@ -98,11 +98,12 @@ 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});
@@ -126,11 +127,16 @@ 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') {
+						console.warn('[OpenAi] Response truncated: max_completion_tokens reached before finish_reason=stop');
+					}
+
 					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 +153,7 @@ 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);