Merge nucleic/lucid-river-toad-6efj into dev

spikes/WslcApiDump/Program.cs

@@ -20,6 +20,10 @@ namespace WslcApiDump;
 /// constructor is lazy and always succeeds; `Start()` is where the service is consulted, and it
 /// refuses with `ERROR_ALREADY_EXISTS`. So reattach needs the internal COM interface, which is
 /// what D13 assumes (docs/WINDOWS_PORT.md §13.1).
+///
+/// `--internal` then asks the question D13 itself rests on and nobody has answered: is that
+/// internal interface reachable? `wslc.idl` declares no activatable class, so there is no CLSID
+/// to name — see <see cref="InternalComProbe"/>. `--internal-call` also calls through it.
 /// </summary>
 internal static class Program
 {
@@ -96,6 +100,12 @@ internal static class Program
             }
         }
 
+        // Independent of the compat-surface checks above: this asks whether the SERVICE-INTERNAL
+        // interface can be reached at all, which is what D13's enumeration/reattach/pty arm
+        // hangs on (docs/WINDOWS_PORT.md §13.2).
+        if (args.Contains("--internal") || args.Contains("--internal-call"))
+            InternalComProbe.Run(callThrough: args.Contains("--internal-call"));
+
         Console.WriteLine();
         if (componentsMissing is { Count: > 0 })
         {