Fix documentation anomalies: incorrect API signatures, missing SDK links, wrong streaming patterns

[Copilot]

Summary

Systematic audit of all SDK documentation against actual source code revealed 10 documentation anomalies across 6 files. All fixes are documentation-only — no source code changes.

Changes by File

Root README.md

Fix	Before	After
C# unload method name	await model.Unload()	await model.UnloadAsync()
C# streaming missing parameter	CompleteChatStreamingAsync(messages)	CompleteChatStreamingAsync(messages, CancellationToken.None)

sdk/cs/README.md

Fix	Before	After
Non-existent factory methods (3 occurrences)	ChatMessage.FromUser("...") / ChatMessage.FromSystem("...")	new ChatMessage { Role = "user", Content = "..." }
Streaming property doesn't exist	chunk.Choices?[0]?.Delta?.Content	chunk.Choices?[0]?.Message?.Content
Internal property used in public example	m.SelectedVariant.Info.DisplayName	m.Info.DisplayName

sdk/js/README.md

Fix	Before	After
Streaming chunk access (2 occurrences)	chunk.choices?.[0]?.message?.content	chunk.choices?.[0]?.delta?.content

sdk/python/README.md

Fix	Before	After
Streaming pattern	Callback: client.complete_streaming_chat(messages, on_chunk)	Generator: for chunk in client.complete_streaming_chat(messages):

sdk/rust/README.md

Fix	Before	After
Non-existent trait	"All models implement the IModel trait"	"All models are represented by the Model type"
Missing error variant	8 variants listed	9 variants (added Internal { reason })
Wrong license	"MIT"	"Microsoft Software License Terms"

docs/README.md

Fix	Before	After
Missing SDK references	Only C# and JS listed	Added Python and Rust SDK links

Verification Method

Each fix was verified by reading the actual source code:

• C# ChatMessage constructor syntax confirmed in ChatCompletionsTests.cs
• C# streaming Message.Content (not Delta) confirmed in ChatClient.cs — both streaming and non-streaming return ChatCompletionCreateResponse
• JS streaming delta.content confirmed in chatClient.ts JSDoc
• Python generator return confirmed in chat_client.py:263-290
• Rust Model struct confirmed in lib.rs:16; no trait exists
• Rust error variants confirmed in error.rs:4-33
• LICENSE file confirmed as Microsoft Software License Terms

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Project	Deployment	Actions	Updated (UTC)
foundry-local	Ready	Preview, Comment	Apr 6, 2026 4:31pm

[Copilot]

Pull request overview

This PR corrects SDK documentation examples and reference text to match the actual implemented APIs across C#, JavaScript, Python, and Rust, plus adds missing SDK links in the docs index.

Changes:

• Fix incorrect/obsolete API signatures and usage patterns (C# unload + streaming signature; Python generator-based streaming; JS streaming chunk access).
• Remove references to non-existent types/properties (C# ChatMessage.From*, Delta, internal SelectedVariant; Rust IModel trait) and add the missing Rust error variant.
• Correct licensing text in Rust README and add Python/Rust SDK links to docs/README.md.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
README.md	Updates C# quickstart snippet to use UnloadAsync() and the correct streaming signature including CancellationToken.
sdk/cs/README.md	Fixes C# examples to use valid ChatMessage construction, correct streaming chunk access (Message.Content), and avoids internal properties.
sdk/js/README.md	Fixes JS streaming examples to read delta.content from streaming chunks.
sdk/python/README.md	Updates Python streaming docs to the supported generator iteration pattern.
sdk/rust/README.md	Removes incorrect IModel trait mention, adds missing Internal { reason } error variant, and corrects license text.
docs/README.md	Adds missing Python and Rust SDK reference links.

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