diff --git a/src/config/types.ts b/src/config/types.ts
index 10099821a..45413dfb9 100644
--- a/src/config/types.ts
+++ b/src/config/types.ts
@@ -1212,7 +1212,6 @@ export type AgentDefaultsConfig = {
       | "msteams"
       | "signal"
       | "imessage"
-      | "msteams"
       | "none";
     /** Optional delivery override (E.164 for WhatsApp, chat id for Telegram). */
     to?: string;
diff --git a/src/logging.ts b/src/logging.ts
index e3ded381c..3c8604430 100644
--- a/src/logging.ts
+++ b/src/logging.ts
@@ -503,13 +503,19 @@ function formatConsoleLine(opts: {
 }
 
 function writeConsoleLine(level: Level, line: string) {
+  const sanitized =
+    process.platform === "win32" && process.env.GITHUB_ACTIONS === "true"
+      ? line
+          .replace(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g, "?")
+          .replace(/[\uD800-\uDFFF]/g, "?")
+      : line;
   const sink = rawConsole ?? console;
   if (forceConsoleToStderr || level === "error" || level === "fatal") {
-    (sink.error ?? console.error)(line);
+    (sink.error ?? console.error)(sanitized);
   } else if (level === "warn") {
-    (sink.warn ?? console.warn)(line);
+    (sink.warn ?? console.warn)(sanitized);
   } else {
-    (sink.log ?? console.log)(line);
+    (sink.log ?? console.log)(sanitized);
   }
 }