Add named local build variants

src/main.zig

@@ -82,6 +82,10 @@ pub fn main(init: std.process.Init) !u8 {
             return 69;
         }
         if (std.mem.eql(u8, arg, "mimctl")) {
+            if (!profile.local_socket) {
+                try printProfileStub(init.io, stderr, "mimctl");
+                return 69;
+            }
             const sub = args.next() orelse {
                 try stderr.writeStreamingAll(init.io, "mim: mimctl requires a subcommand\n");
                 return 64;
@@ -101,6 +105,10 @@ pub fn main(init: std.process.Init) !u8 {
         }
 
         if (std.mem.eql(u8, arg, "--mimctl")) {
+            if (!profile.local_socket) {
+                try printProfileStub(init.io, stderr, "mimctl");
+                return 69;
+            }
             const socket_path = args.next() orelse {
                 try stderr.writeStreamingAll(init.io, "mim: --mimctl requires a socket path\n");
                 return 64;
@@ -152,6 +160,7 @@ fn printProfile(allocator: std.mem.Allocator, io: std.Io, stdout: std.Io.File) !
 
 fn isProfileStub(arg: []const u8) bool {
     return std.mem.eql(u8, arg, "remote") or
+        std.mem.eql(u8, arg, "mimctl") or
         std.mem.eql(u8, arg, "plugin") or
         std.mem.eql(u8, arg, "plugins") or
         std.mem.eql(u8, arg, "background-agent") or
@@ -243,6 +252,7 @@ test "regular: help text names the binary and smoke boundary" {
 
 test "regular: excluded profile capabilities have explicit stubs" {
     try std.testing.expect(isProfileStub("remote"));
+    try std.testing.expect(isProfileStub("mimctl"));
     try std.testing.expect(isProfileStub("plugin"));
     try std.testing.expect(isProfileStub("background-agent"));
     try std.testing.expect(!isProfileStub("context"));