From 2f9b741cf3f3029b04dc7bcdf80313ab15cd1d5f Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 7 Jan 2026 17:47:06 +0000
Subject: [PATCH 1/4] Initial plan


From 9cd64b17eb10ac5325be0f1754c3487346016eda Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 7 Jan 2026 17:49:58 +0000
Subject: [PATCH 2/4] Remove Bjorn Melin from LICENSE, update copyright to
 shyamsridhar123

Co-authored-by: shyamsridhar123 <117464342+shyamsridhar123@users.noreply.github.com>
---
 LICENSE | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/LICENSE b/LICENSE
index 72c29b3..0f0a7a6 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2025 Bjorn Melin
+Copyright (c) 2025 shyamsridhar123
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

From 8f511599d71b69a740584c88c37147b6cd3ba1e6 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 8 Jan 2026 00:54:51 +0000
Subject: [PATCH 3/4] Initial plan


From fc67df8e1ffe611d47de36a91be83ed5177a6fbc Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 8 Jan 2026 01:02:33 +0000
Subject: [PATCH 4/4] fix: resolve Jest ESM configuration and implementation
 bugs

- Add node-fetch mock to handle ESM module in tests
- Fix import attributes syntax for ts-jest compatibility
- Fix convertMessagesToCopilotPrompt to maintain conversation order
- Fix detectLanguageFromMessages regex to handle more delimiters
- All tests now passing (11/11)

Co-authored-by: shyamsridhar123 <117464342+shyamsridhar123@users.noreply.github.com>
---
 jest.config.js                  |  4 ++++
 src/__mocks__/node-fetch.ts     | 13 +++++++++++++
 src/config/index.ts             |  3 ++-
 src/services/copilot-service.ts | 22 +++++++++++-----------
 4 files changed, 30 insertions(+), 12 deletions(-)
 create mode 100644 src/__mocks__/node-fetch.ts

diff --git a/jest.config.js b/jest.config.js
index d60ed5c..9207c7e 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -5,12 +5,16 @@ export default {
   extensionsToTreatAsEsm: ['.ts'],
   moduleNameMapper: {
     '^(\\.{1,2}/.*)\\.js$': '$1',
+    '^node-fetch$': '<rootDir>/src/__mocks__/node-fetch.ts',
   },
   transform: {
     '^.+\\.tsx?$': [
       'ts-jest',
       {
         useESM: true,
+        diagnostics: {
+          ignoreCodes: [151002],
+        },
       },
     ],
   },
diff --git a/src/__mocks__/node-fetch.ts b/src/__mocks__/node-fetch.ts
new file mode 100644
index 0000000..8d11a53
--- /dev/null
+++ b/src/__mocks__/node-fetch.ts
@@ -0,0 +1,13 @@
+// Mock implementation of node-fetch for Jest tests
+const mockFetch = jest.fn(() =>
+  Promise.resolve({
+    ok: true,
+    status: 200,
+    statusText: 'OK',
+    json: jest.fn(() => Promise.resolve({})),
+    text: jest.fn(() => Promise.resolve('')),
+    headers: new Map(),
+  })
+);
+
+export default mockFetch as unknown as typeof fetch;
diff --git a/src/config/index.ts b/src/config/index.ts
index ed83b85..cdd09c8 100644
--- a/src/config/index.ts
+++ b/src/config/index.ts
@@ -1,6 +1,7 @@
 import dotenv from 'dotenv';
 import { z } from 'zod';
-import pkg from '../../package.json' with { type: 'json' };
+// @ts-expect-error - ts-jest doesn't support import attributes yet
+import pkg from '../../package.json';
 
 // Load environment variables
 dotenv.config();
diff --git a/src/services/copilot-service.ts b/src/services/copilot-service.ts
index 91693dd..16e3211 100644
--- a/src/services/copilot-service.ts
+++ b/src/services/copilot-service.ts
@@ -20,32 +20,32 @@ export function convertMessagesToCopilotPrompt(messages: OpenAIMessage[]): strin
     return '';
   }
   
-  let systemPrompt = '';
-  let userPrompts = '';
-  let assistantResponses = '';
+  let prompt = '';
   
-  // Process messages in order to construct a coherent prompt
+  // Process messages in order to maintain conversation flow
   for (const message of messages) {
     if (!message.role || !message.content) continue;
     
     switch (message.role) {
       case 'system':
-        systemPrompt += message.content + '\n\n';
+        prompt += message.content + '\n\n';
         break;
       case 'user':
-        userPrompts += 'User: ' + message.content + '\n\n';
+        prompt += 'User: ' + message.content + '\n\n';
         break;
       case 'assistant':
-        assistantResponses += 'Assistant: ' + message.content + '\n\n';
+        prompt += 'Assistant: ' + message.content + '\n\n';
         break;
     }
   }
   
-  // Ensure it ends with a user message to prompt a response
+  // Ensure it ends with a prompt for the assistant if the last message is from user
   const lastMessage = messages[messages.length - 1];
-  const needsAssistantPrompt = lastMessage.role !== 'user';
+  if (lastMessage.role === 'user') {
+    prompt += 'Assistant: ';
+  }
   
-  return systemPrompt + userPrompts + assistantResponses + (needsAssistantPrompt ? '' : 'Assistant: ');
+  return prompt;
 }
 
 /**
@@ -73,7 +73,7 @@ export function detectLanguageFromMessages(messages: OpenAIMessage[]): string {
   }
   
   // Check for file extensions in the message
-  const fileExtensionMatch = content.match(/\.([a-zA-Z0-9]+)(?:\s|"|')/);
+  const fileExtensionMatch = content.match(/\.([a-zA-Z0-9]+)(?:\s|"|'|\?|$)/);
   if (fileExtensionMatch && fileExtensionMatch[1]) {
     const ext = fileExtensionMatch[1].toLowerCase();
     const extToLang: Record<string, string> = {