@@ -40,11 +40,27 @@ registeredCommands.push(registered);
   },
 
   registerLegacyCommand(id, command) {
+    if (command.match) {
+      if (command.match instanceof RegExp) {
+        command.match = this.anyScopeRegex(command.match);
+      } else if (command.match.regex && typeof command.match !== "function") {
+        command.match = this.anyScopeRegex(command.match.regex);
+      }
+    }
+
     if (!legacyCommands) {
       queuedLegacyCommands![id] = command;
     } else {
       legacyCommands[id] = command;
     }
+  },
+
+  anyScopeRegex(regex) {
+    const out = function (str: string) {
+      return regex.exec(str);
+    };
+    out.regex = regex;
+    return out;
   },
 
   _getCommands() {

@@ -94,6 +94,10 @@ value: string;
     }
 );
 
+export type AnyScopeRegex = RegExp["exec"] & {
+  regex: RegExp;
+};
+
 export type Commands = {
   /**
    * Register a command in the internal slash command system
@@ -106,6 +110,11 @@ */
   registerLegacyCommand: (id: string, command: LegacyCommand) => void;
 
   /**
+   * Creates a regular expression that legacy commands can understand
+   */
+  anyScopeRegex: (regex: RegExp) => AnyScopeRegex;
+
+  /**
    * @private
    */
   _getCommands: () => RegisteredCommand[];
@@ -121,8 +130,6 @@ content: string;
 };
 
 export type LegacyCommand = {
-  match?: {
-    regex: RegExp;
-  };
+  match?: RegExp | { regex: RegExp } | AnyScopeRegex;
   action: (content: string, context: LegacyContext) => LegacyReturn;
 };