Add fallback guidance to wrapper MVP

scripts/long_task_governor_wrapper.mjs

@@ -12,9 +12,7 @@ function parseArgs(argv) {
 }
 
 function readInput(path) {
-  if (!path || path === '-') {
-    return fs.readFileSync(0, 'utf8');
-  }
+  if (!path || path === '-') return fs.readFileSync(0, 'utf8');
   return fs.readFileSync(path, 'utf8');
 }
 
@@ -72,27 +70,42 @@ function bootstrapTaskState(input, classificationResult) {
 
 function validateSilentLaunch(input, classificationResult) {
   if (!classificationResult.silentCandidate) {
-    return { ok: true, reason: 'not a silent long-task' };
+    return {
+      ok: true,
+      reason: 'not a silent long-task',
+      recommendedFallback: 'none',
+      requiredNextAction: 'proceed_with_normal_long_task_flow',
+    };
   }
 
   if (!input.checkpointTrigger) {
-    return { ok: false, reason: 'missing first forced checkpoint trigger' };
+    return {
+      ok: false,
+      reason: 'missing first forced checkpoint trigger',
+      recommendedFallback: 'non_silent_follow_up',
+      requiredNextAction: 'define_first_checkpoint_trigger_before_silent_launch',
+    };
   }
 
   if (!input.externalizedTrigger) {
-    return { ok: false, reason: 'missing externalized checkpoint path' };
+    return {
+      ok: false,
+      reason: 'missing externalized checkpoint path',
+      recommendedFallback: 'non_silent_follow_up',
+      requiredNextAction: 'bind_externalized_checkpoint_path_or_abort_silent_launch',
+    };
   }
 
   return {
     ok: true,
     reason: `${input.triggerKind || 'externalized'} trigger is defined`,
+    recommendedFallback: 'none',
+    requiredNextAction: 'proceed_with_silent_launch',
   };
 }
 
 function planHandoff(classificationResult) {
-  if (classificationResult.needsOwnerDecision) {
-    return { mode: 'button_path' };
-  }
+  if (classificationResult.needsOwnerDecision) return { mode: 'button_path' };
   return { mode: 'direct_reply' };
 }
 
@@ -114,6 +127,8 @@ function main() {
     taskRecord,
     silentLaunchOk: silentLaunch.ok,
     silentLaunchReason: silentLaunch.reason,
+    recommendedFallback: silentLaunch.recommendedFallback,
+    requiredNextAction: silentLaunch.requiredNextAction,
     handoff,
   };