Clean up samples, tests, and docs

[bmehta001]

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

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Project	Deployment	Actions	Updated (UTC)
foundry-local	Ready	Preview, Comment	Apr 9, 2026 5:44am

[Copilot]

Pull request overview

This PR updates SDK validation, sample/test code, and documentation to align with the latest SDK streaming/tool-calling shapes (notably delta vs message) and to remove outdated/incorrect guidance.

Changes:

• JS SDK: harden tool validation to avoid crashing when tool.function.description is missing.
• Samples/tests: fix streaming chunk parsing (message → delta) and ensure tool responses include the required ToolCallId; remove unnecessary Python async scaffolding.
• Docs/CI: update Rust API docs to remove ModelVariant from the public surface and align return types; bump Python test README minimum version; set FOUNDRY_TESTING_MODE in test pipelines.

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
sdk/rust/docs/api.md	Updates Rust public API documentation to reflect the Model-only public surface and revised return types.
sdk/python/test/README.md	Aligns test prerequisites with Python SDK minimum supported version.
sdk/js/src/openai/chatClient.ts	Fixes tool validation crash when description is undefined.
sdk/cs/test/FoundryLocal.Tests/ChatCompletionsTests.cs	Ensures tool-role messages include ToolCallId so tool-call continuations work.
samples/python/tutorial-voice-to-text/src/app.py	Removes unnecessary asyncio usage in a synchronous SDK sample.
samples/python/tutorial-tool-calling/src/app.py	Removes unnecessary asyncio usage and keeps sample aligned with sync SDK patterns.
samples/python/tutorial-document-summarizer/src/app.py	Converts summarizer helpers/main to synchronous flow (no async/await).
samples/python/tutorial-chat-assistant/src/app.py	Fixes streaming access to use delta.content and removes unnecessary async scaffolding.
samples/python/tool-calling/src/app.py	Removes unnecessary asyncio usage and keeps sample aligned with sync SDK patterns.
samples/python/native-chat-completions/src/app.py	Removes unnecessary asyncio usage in a synchronous SDK sample.
samples/js/tutorial-chat-assistant/app.js	Updates streaming sample to for await...of and reads delta.content.
samples/js/native-chat-completions/app.js	Updates streaming sample to read delta.content.
samples/js/chat-and-audio-foundry-local/src/app.js	Updates streaming sample to read delta.content.
samples/cs/tool-calling-foundry-local-sdk/Program.cs	Adds ToolCallId to tool-role message in the tool-calling loop.
.pipelines/templates/test-rust-steps.yml	Sets FOUNDRY_TESTING_MODE for Rust unit/integration test runs.
.pipelines/templates/test-python-steps.yml	Sets FOUNDRY_TESTING_MODE for Python test runs.
.pipelines/templates/test-js-steps.yml	Sets FOUNDRY_TESTING_MODE for JS test runs.
.pipelines/templates/test-cs-steps.yml	Sets FOUNDRY_TESTING_MODE for C# test runs.

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[Copilot]

The variants() row now returns Vec<Arc<Model>>, but the description “All variants in this model” is ambiguous because the elements are Model handles (each representing a single variant), not a ModelVariant type. Clarify that variants() returns per-variant Model instances (and for a single-variant model it returns a single-element list containing itself) to match the actual API behavior.

Suggested change

	| `variants` | `fn variants(&self) -> Vec<Arc<Model>>` | All variants in this model. |
	| `select_variant` | `fn select_variant(&self, variant: &Model) -> Result<(), FoundryLocalError>` | Select a variant from `variants()`. |
	| `variants` | `fn variants(&self) -> Vec<Arc<Model>>` | Returns one `Model` handle per variant. For a single-variant model, this returns a single-element list containing this model itself. |
	| `select_variant` | `fn select_variant(&self, variant: &Model) -> Result<(), FoundryLocalError>` | Select one of the per-variant `Model` handles returned by `variants()`. |

[bmehta001]

May technically be correct, but could be very confusing wording