Clean up samples, tests, and docs (#619)

Fix SDK: 
- JS: Fixed tool.function.description.trim() TypeError when description
is undefined (chatClient.ts:170)

Fix samples/tests
- C#: Added missing ToolCallId on tool response
- Python: Removed unnecessary async/await (6 files), fixed
.message.content → .delta.content crash
- JS: Fixed .message → .delta in streaming (3 files), replaced broken
callback with for await...of

Fix documentation
- Python test README: Fixed version 3.10+ → 3.11+
- Rust: Fixed stale return types, removed private ModelVariant section
and selected_variant() method

Author: bmehta001

.pipelines/templates/test-cs-steps.yml

@@ -20,6 +20,7 @@ steps:
       $testDataDir = "$(Build.SourcesDirectory)/test-data-shared"
       Write-Host "##vso[task.setvariable variable=repoRoot]$repoRoot"
       Write-Host "##vso[task.setvariable variable=testDataDir]$testDataDir"
+      Write-Host "##vso[task.setvariable variable=FOUNDRY_TESTING_MODE]1"
 
 - task: UseDotNet@2
   displayName: 'Use .NET 9 SDK'

.pipelines/templates/test-js-steps.yml

@@ -20,6 +20,7 @@ steps:
       $testDataDir = "$(Build.SourcesDirectory)/test-data-shared"
       Write-Host "##vso[task.setvariable variable=repoRoot]$repoRoot"
       Write-Host "##vso[task.setvariable variable=testDataDir]$testDataDir"
+      Write-Host "##vso[task.setvariable variable=FOUNDRY_TESTING_MODE]1"
 
 - ${{ if eq(parameters.isWinML, true) }}:
   - task: PowerShell@2

.pipelines/templates/test-python-steps.yml

@@ -20,6 +20,7 @@ steps:
       $testDataDir = "$(Build.SourcesDirectory)/test-data-shared"
       Write-Host "##vso[task.setvariable variable=repoRoot]$repoRoot"
       Write-Host "##vso[task.setvariable variable=testDataDir]$testDataDir"
+      Write-Host "##vso[task.setvariable variable=FOUNDRY_TESTING_MODE]1"
 
 - ${{ if eq(parameters.isWinML, true) }}:
   - task: PowerShell@2

.pipelines/templates/test-rust-steps.yml

@@ -18,6 +18,7 @@ steps:
       $testDataDir = "$(Build.SourcesDirectory)/test-data-shared"
       Write-Host "##vso[task.setvariable variable=repoRoot]$repoRoot"
       Write-Host "##vso[task.setvariable variable=testDataDir]$testDataDir"
+      Write-Host "##vso[task.setvariable variable=FOUNDRY_TESTING_MODE]1"
 
 - ${{ if eq(parameters.isWinML, true) }}:
   - task: PowerShell@2

samples/cs/tool-calling-foundry-local-sdk/Program.cs

@@ -141,6 +141,7 @@ await model.DownloadAsync(progress =>
         var response = new ChatMessage
         {
             Role = "tool",
+            ToolCallId = chunk!.Choices[0].Message.ToolCalls![0].Id,
             Content = result.ToString(),
         };
         messages.Add(response);

samples/js/chat-and-audio-foundry-local/src/app.js

@@ -95,7 +95,7 @@ async function main() {
     },
     { role: "user", content: transcription.text },
   ])) {
-    const content = chunk.choices?.[0]?.message?.content;
+    const content = chunk.choices?.[0]?.delta?.content;
     if (content) {
       process.stdout.write(content);
     }

samples/js/native-chat-completions/app.js

@@ -84,7 +84,7 @@ console.log('\nTesting streaming completion...');
 for await (const chunk of chatClient.completeStreamingChat(
     [{ role: 'user', content: 'Write a short poem about programming.' }]
 )) {
-    const content = chunk.choices?.[0]?.message?.content;
+    const content = chunk.choices?.[0]?.delta?.content;
     if (content) {
         process.stdout.write(content);
     }

samples/js/tutorial-chat-assistant/app.js

@@ -73,13 +73,13 @@ while (true) {
     // Stream the response token by token
     process.stdout.write('Assistant: ');
     let fullResponse = '';
-    await chatClient.completeStreamingChat(messages, (chunk) => {
-        const content = chunk.choices?.[0]?.message?.content;
+    for await (const chunk of chatClient.completeStreamingChat(messages)) {
+        const content = chunk.choices?.[0]?.delta?.content;
         if (content) {
             process.stdout.write(content);
             fullResponse += content;
         }
-    });
+    }
     console.log('\n');
     // </streaming>
 

samples/python/native-chat-completions/src/app.py

@@ -1,11 +1,10 @@
 # <complete_code>
 # <imports>
-import asyncio
 from foundry_local_sdk import Configuration, FoundryLocalManager
 # </imports>
 
 
-async def main():
+def main():
     # <init>
     # Initialize the Foundry Local SDK
     config = Configuration(app_name="foundry_local_samples")
@@ -64,5 +63,5 @@ def ep_progress(ep_name: str, percent: float):
 
 
 if __name__ == "__main__":
-    asyncio.run(main())
+    main()
 # </complete_code>

samples/python/tool-calling/src/app.py

@@ -1,6 +1,5 @@
 # <complete_code>
 # <imports>
-import asyncio
 import json
 from foundry_local_sdk import Configuration, FoundryLocalManager
 # </imports>
@@ -130,7 +129,7 @@ def process_tool_calls(messages, response, client):
 
 
 # <init>
-async def main():
+def main():
     # Initialize the Foundry Local SDK
     config = Configuration(app_name="foundry_local_samples")
     FoundryLocalManager.initialize(config)
@@ -192,5 +191,5 @@ def ep_progress(ep_name: str, percent: float):
 
 
 if __name__ == "__main__":
-    asyncio.run(main())
+    main()
 # </complete_code>