docs(execute_code): correct the compiler description now that Roslyn comes from Unity

The description promised C# 12+ and told callers Microsoft.CodeAnalysis had to be
installed. Neither holds once the editor's own Roslyn is loaded: nothing needs
installing, and that copy is 3.11, which caps the language at C# 9.

Reference page regenerated with tools/generate_docs_reference.py; it is the only
page that changed.

Author: lgarczyn

Server/src/services/tools/execute_code.py

@@ -26,7 +26,7 @@
         "Actions: execute (run code), get_history (list past executions), "
         "replay (re-run a history entry), clear_history. "
         "NOTE: safety_checks blocks known dangerous patterns but is not a full sandbox. "
-        "Compiler options: 'auto' (Roslyn if available, else CodeDom), 'roslyn' (C# 12+, requires Microsoft.CodeAnalysis), 'codedom' (C# 6 only)."
+        "Compiler options: 'auto' and 'roslyn' both use the Roslyn that ships with Unity (C# 9); 'codedom' forces the legacy provider (C# 6 only)."
     ),
     group="scripting_ext",
     annotations=ToolAnnotations(
@@ -61,8 +61,8 @@ async def execute_code(
     compiler: Annotated[
         Literal["auto", "roslyn", "codedom"],
         "Compiler backend for 'execute' action. "
-        "'auto' uses Roslyn if Microsoft.CodeAnalysis is installed, else falls back to CodeDom. "
-        "'roslyn' forces Roslyn (C# 12+). 'codedom' forces legacy CSharpCodeProvider (C# 6). Default: auto.",
+        "'auto' and 'roslyn' both load the Roslyn shipped with the editor, which caps the language at C# 9. "
+        "'codedom' forces the legacy CSharpCodeProvider (C# 6). Default: auto.",
     ] = "auto",
 ) -> dict[str, Any]:
     unity_instance = await get_unity_instance_from_context(ctx)

website/docs/reference/tools/scripting_ext/execute_code.md

@@ -12,7 +12,7 @@ description: "Execute arbitrary C# code inside the Unity Editor."
 
 ## Description
 
-Execute arbitrary C# code inside the Unity Editor. The code runs as a method body with access to UnityEngine and UnityEditor namespaces. Use 'return' to send data back. Compiled in-memory — no script files created. Actions: execute (run code), get_history (list past executions), replay (re-run a history entry), clear_history. NOTE: safety_checks blocks known dangerous patterns but is not a full sandbox. Compiler options: 'auto' (Roslyn if available, else CodeDom), 'roslyn' (C# 12+, requires Microsoft.CodeAnalysis), 'codedom' (C# 6 only).
+Execute arbitrary C# code inside the Unity Editor. The code runs as a method body with access to UnityEngine and UnityEditor namespaces. Use 'return' to send data back. Compiled in-memory — no script files created. Actions: execute (run code), get_history (list past executions), replay (re-run a history entry), clear_history. NOTE: safety_checks blocks known dangerous patterns but is not a full sandbox. Compiler options: 'auto' and 'roslyn' both use the Roslyn that ships with Unity (C# 9); 'codedom' forces the legacy provider (C# 6 only).
 
 ## Parameters
 
@@ -23,7 +23,7 @@ Execute arbitrary C# code inside the Unity Editor. The code runs as a method bod
 | `safety_checks` | `bool` | — | Enable basic blocked-pattern checks (File.Delete, Process.Start, infinite loops, etc). Not a full sandbox — advanced bypass is possible. Default: true. |
 | `index` | `int \| None` | — | History entry index to replay (for 'replay' action). |
 | `limit` | `int` | — | Number of history entries to return (for 'get_history' action, 1-50). Default: 10. |
-| `compiler` | `Literal['auto', 'roslyn', 'codedom']` | — | Compiler backend for 'execute' action. 'auto' uses Roslyn if Microsoft.CodeAnalysis is installed, else falls back to CodeDom. 'roslyn' forces Roslyn (C# 12+). 'codedom' forces legacy CSharpCodeProvider (C# 6). Default: auto. |
+| `compiler` | `Literal['auto', 'roslyn', 'codedom']` | — | Compiler backend for 'execute' action. 'auto' and 'roslyn' both load the Roslyn shipped with the editor, which caps the language at C# 9. 'codedom' forces the legacy CSharpCodeProvider (C# 6). Default: auto. |
 
 ## Returns