Add @ symbol support documentation to .NET CLI commands

Co-authored-by: meaghanlewis <[email protected]>

Author: Copilot

docs/core/tools/dotnet-new-install.md

@@ -54,6 +54,8 @@ Starting with .NET SDK 6.0.100, installed template packages are available in lat
 
 ## Options
 
+[!INCLUDE [response-file](../../../includes/cli-response-file.md)]
+
 - **`--add-source|--nuget-source <SOURCE>`**
 
   By default, `dotnet new install` uses the hierarchy of NuGet configuration files from the current directory to determine the NuGet source the package can be installed from. If `--nuget-source` is specified, the source will be added to the list of sources to be checked.

docs/core/tools/dotnet-tool-install.md

@@ -96,6 +96,8 @@ For more information, see [Install a local tool](global-tools.md#install-a-local
 
 ## Options
 
+[!INCLUDE [response-file](../../../includes/cli-response-file.md)]
+
 [!INCLUDE [allow-downgrade](../../../includes/cli-allow-downgrade.md)]
 
 - **`--allow-roll-forward`**

docs/core/tools/dotnet-tool-update.md

@@ -58,6 +58,8 @@ The `dotnet tool update` command provides a way for you to update .NET tools on
 
 ## Options
 
+[!INCLUDE [response-file](../../../includes/cli-response-file.md)]
+
 [!INCLUDE [add-source](../../../includes/cli-add-source.md)]
 
 - **`--all`**

docs/core/tools/dotnet-workload-install.md

@@ -74,6 +74,8 @@ The `dotnet workload update` command also downloads advertising manifests. The d
 
 ## Options
 
+[!INCLUDE [response-file](../../../includes/cli-response-file.md)]
+
 [!INCLUDE [config-file](../../../includes/cli-configfile.md)]
 
 [!INCLUDE [disable-parallel](../../../includes/cli-disable-parallel.md)]

docs/core/tools/dotnet-workload-search.md

@@ -33,6 +33,8 @@ For more information about the `dotnet workload` commands, see the [dotnet workl
 
 ## Options
 
+[!INCLUDE [response-file](../../../includes/cli-response-file.md)]
+
 [!INCLUDE [help](../../../includes/cli-help.md)]
 
 [!INCLUDE [verbosity](../../../includes/cli-verbosity-minimal.md)]

includes/cli-response-file.md

@@ -0,0 +1,7 @@
+---
+ms.date: 11/11/2025
+ms.topic: include
+---
+- **`@<file>`**
+
+  Reads a response file for additional options. The file name must immediately follow the `@` character with no white space between them. Each line in the response file should contain a single option or argument. You can't use the backslash character (`\`) to concatenate lines. Response files help when commands exceed terminal limits. You can combine response file options with command-line arguments.