Add Rust (and C# where missing) to SDK language lists in docs

Update documentation, READMEs, copilot instructions, and test scenario
files to include Rust in all language listings where it was missing.
Also add C# to test scenario docs where implementations already exist
but were not listed.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Copilot

.github/copilot-instructions.md

@@ -4,7 +4,7 @@
 
 ## Big picture 🔧
 
-- The repo implements language SDKs (Node/TS, Python, Go, .NET) that speak to the **Copilot CLI** via **JSON‑RPC** (see `README.md` and `nodejs/src/client.ts`).
+- The repo implements language SDKs (Node/TS, Python, Go, .NET, Rust) that speak to the **Copilot CLI** via **JSON‑RPC** (see `README.md` and `nodejs/src/client.ts`).
 - Typical flow: your App → SDK client → JSON-RPC → Copilot CLI (server mode). The CLI must be installed or you can connect to an external CLI server via the `CLI URL option (language-specific casing)` (Node: `cliUrl`, Go: `CLIUrl`, .NET: `CliUrl`, Python: `cli_url`).
 
 ## Most important files to read first 📚

CONTRIBUTING.md

@@ -2,7 +2,7 @@
 
 Thanks for your interest in contributing!
 
-This repository contains the Copilot SDK, a set of multi-language SDKs (Node/TypeScript, Python, Go, .NET) for building applications with the GitHub Copilot agent, maintained by the GitHub Copilot team.
+This repository contains the Copilot SDK, a set of multi-language SDKs (Node/TypeScript, Python, Go, .NET, Rust) for building applications with the GitHub Copilot agent, maintained by the GitHub Copilot team.
 
 Contributions to this project are [released](https://help.github.com/articles/github-terms-of-service/#6-contributions-under-repository-license) to the public under the [project's open source license](LICENSE).
 

docs/features/index.md

@@ -1,6 +1,6 @@
 # Features
 
-These guides cover the capabilities you can add to your Copilot SDK application. Each guide includes examples in all supported languages (TypeScript, Python, Go, .NET, and Java).
+These guides cover the capabilities you can add to your Copilot SDK application. Each guide includes examples in all supported languages (TypeScript, Python, Go, .NET, Java, and Rust).
 
 > **New to the SDK?** Start with the [Getting Started tutorial](../getting-started.md) first, then come back here to add more capabilities.
 

docs/integrations/microsoft-agent-framework.md

@@ -14,7 +14,7 @@ The Microsoft Agent Framework is the unified successor to Semantic Kernel and Au
 | **A2A protocol** | Agent-to-Agent communication standard supported by the framework |
 
 > [!NOTE]
-> MAF integration packages are available for **.NET** and **Python**. For TypeScript, Go, and Java, use the Copilot SDK directly—the standard SDK APIs already provide tool calling, streaming, and custom agents.
+> MAF integration packages are available for **.NET** and **Python**. For TypeScript, Go, Java, and Rust, use the Copilot SDK directly—the standard SDK APIs already provide tool calling, streaming, and custom agents.
 
 ## Prerequisites
 

docs/observability/opentelemetry.md

@@ -86,13 +86,13 @@ var client = new CopilotClient(new CopilotClientOptions()
 
 ### TelemetryConfig options
 
-| Option | Node.js | Python | Go | .NET | Java | Description |
-|---|---|---|---|---|---|---|
-| OTLP endpoint | `otlpEndpoint` | `otlp_endpoint` | `OTLPEndpoint` | `OtlpEndpoint` | `otlpEndpoint` | OTLP HTTP endpoint URL |
-| File path | `filePath` | `file_path` | `FilePath` | `FilePath` | `filePath` | File path for JSON-lines trace output |
-| Exporter type | `exporterType` | `exporter_type` | `ExporterType` | `ExporterType` | `exporterType` | `"otlp-http"` or `"file"` |
-| Source name | `sourceName` | `source_name` | `SourceName` | `SourceName` | `sourceName` | Instrumentation scope name |
-| Capture content | `captureContent` | `capture_content` | `CaptureContent` | `CaptureContent` | `captureContent` | Whether to capture message content |
+| Option | Node.js | Python | Go | .NET | Java | Rust | Description |
+|---|---|---|---|---|---|---|---|
+| OTLP endpoint | `otlpEndpoint` | `otlp_endpoint` | `OTLPEndpoint` | `OtlpEndpoint` | `otlpEndpoint` | `otlp_endpoint` | OTLP HTTP endpoint URL |
+| File path | `filePath` | `file_path` | `FilePath` | `FilePath` | `filePath` | `file_path` | File path for JSON-lines trace output |
+| Exporter type | `exporterType` | `exporter_type` | `ExporterType` | `ExporterType` | `exporterType` | `exporter_type` | `"otlp-http"` or `"file"` |
+| Source name | `sourceName` | `source_name` | `SourceName` | `SourceName` | `sourceName` | `source_name` | Instrumentation scope name |
+| Capture content | `captureContent` | `capture_content` | `CaptureContent` | `CaptureContent` | `captureContent` | `capture_content` | Whether to capture message content |
 
 ### Trace context propagation
 

docs/troubleshooting/mcp-debugging.md

@@ -446,7 +446,7 @@ When opening an issue or asking for help, collect:
 
 * [ ] SDK language and version
 * [ ] CLI version (`copilot --version`)
-* [ ] MCP server type (Node.js, Python, .NET, Go, etc.)
+* [ ] MCP server type (Node.js, Python, .NET, Go, Rust, etc.)
 * [ ] Full MCP server configuration (redact secrets)
 * [ ] Result of manual `initialize` test
 * [ ] Result of manual `tools/list` test  

test/scenarios/README.md

@@ -1,6 +1,6 @@
 # SDK E2E Scenario Tests
 
-End-to-end scenario tests for the Copilot SDK. Each scenario demonstrates a specific SDK capability with implementations in TypeScript, Python, and Go.
+End-to-end scenario tests for the Copilot SDK. Each scenario demonstrates a specific SDK capability with implementations in TypeScript, Python, Go, C#, and Rust.
 
 ## Structure
 
@@ -35,4 +35,4 @@ COPILOT_CLI_PATH=/path/to/copilot GITHUB_TOKEN=$(gh auth token) bash <category>/
 
 - **Copilot CLI** — set `COPILOT_CLI_PATH`
 - **GitHub token** — set `GITHUB_TOKEN` or use `gh auth login`
-- **Node.js 20+**, **Python 3.10+**, **Go 1.24+** (per language)
+- **Node.js 20+**, **Python 3.10+**, **Go 1.24+**, **.NET 8+**, **Rust 1.94+** (per language)

test/scenarios/prompts/attachments/README.md

@@ -7,7 +7,7 @@ Demonstrates sending **file attachments** alongside a prompt using the Copilot S
 1. Creates a session with a custom system prompt in `replace` mode
 2. Resolves the path to `sample-data.txt` (a small text file in the scenario root)
 3. Sends: _"What languages are listed in the attached file?"_ with the file as an attachment
-4. Prints the response — which should list TypeScript, Python, and Go
+4. Prints the response — which should list TypeScript, Python, Go, C#, and Rust
 
 ## Attachment Format
 
@@ -51,7 +51,7 @@ The `sample-data.txt` file contains basic project metadata used as the attachmen
 Project: Copilot SDK Samples
 Version: 1.0.0
 Description: Minimal buildable samples demonstrating the Copilot SDK
-Languages: TypeScript, Python, Go
+Languages: TypeScript, Python, Go, C#, Rust
 ```
 
 ## Run

test/scenarios/prompts/attachments/sample-data.txt

@@ -1,4 +1,4 @@
 Project: Copilot SDK Samples
 Version: 1.0.0
 Description: Minimal buildable samples demonstrating the Copilot SDK
-Languages: TypeScript, Python, Go
+Languages: TypeScript, Python, Go, C#, Rust

test/scenarios/transport/README.md

@@ -6,8 +6,8 @@ Minimal samples organized by **transport model** — the wire protocol used to c
 
 | Transport | Description | Languages |
 |-----------|-------------|-----------|
-| **[stdio](stdio/)** | SDK spawns `copilot` as a child process and communicates via stdin/stdout | TypeScript, Python, Go |
-| **[tcp](tcp/)** | SDK connects to a pre-running `copilot` TCP server | TypeScript, Python, Go |
+| **[stdio](stdio/)** | SDK spawns `copilot` as a child process and communicates via stdin/stdout | TypeScript, Python, Go, C#, Rust |
+| **[tcp](tcp/)** | SDK connects to a pre-running `copilot` TCP server | TypeScript, Python, Go, C#, Rust |
 | **[wasm](wasm/)** | SDK loads `copilot` as an in-process WASM module | TypeScript |
 
 ## How They Differ
@@ -23,7 +23,7 @@ Minimal samples organized by **transport model** — the wire protocol used to c
 
 - **Authentication** — set `GITHUB_TOKEN`, or run `gh auth login`
 - **Copilot CLI** — required for stdio and tcp (set `COPILOT_CLI_PATH`)
-- Language toolchains as needed (Node.js 20+, Python 3.10+, Go 1.24+)
+- Language toolchains as needed (Node.js 20+, Python 3.10+, Go 1.24+, .NET 8+, Rust 1.94+)
 
 ## Verification