feat: enforce auto-next obligation at approved plan task boundaries

scripts/approved_plan_continuity_gate.mjs

@@ -76,11 +76,39 @@ function evaluateContinuity(payload) {
   const taskComplete = payload?.taskState === 'complete';
   const nextAction = payload?.nextDerivedAction ?? payload?.derivedAction ?? null;
   const nextActionKnown = nextAction != null;
+  const explicitNextTaskKnown = payload?.nextTaskKnown === true;
+  const sameApprovedPlan = payload?.sameApprovedPlan === true;
+  const taskBoundaryStop = payload?.taskBoundaryStop === true;
+  const highRiskStop = payload?.highRiskStop === true;
   const hasDispatchReceipt = hasValidDispatchReceipt(payload?.dispatchReceipt ?? null);
   const closureState = payload?.replyClosureState ?? null;
   const isLegalTerminalState = LEGAL_TERMINAL_STATES.has(closureState);
+  const autoNextObligatory = taskComplete
+    && explicitNextTaskKnown
+    && sameApprovedPlan
+    && taskBoundaryStop
+    && !isLegalTerminalState
+    && !highRiskStop;
 
-  if (taskComplete && nextActionKnown && !hasDispatchReceipt && !isLegalTerminalState) {
+  if (autoNextObligatory && !hasDispatchReceipt) {
+    return {
+      ok: false,
+      status: 'continuity_failure',
+      verdict: 'continuity_failure',
+      reason: 'missing_auto_next_dispatch',
+    };
+  }
+
+  if (taskComplete && nextActionKnown && !hasDispatchReceipt && !isLegalTerminalState && !highRiskStop && !('sameApprovedPlan' in (payload ?? {}))) {
+    return {
+      ok: false,
+      status: 'continuity_failure',
+      verdict: 'continuity_failure',
+      reason: 'missing_dispatch_receipt',
+    };
+  }
+
+  if (taskComplete && nextActionKnown && !hasDispatchReceipt && !isLegalTerminalState && !highRiskStop && sameApprovedPlan && !taskBoundaryStop && !explicitNextTaskKnown) {
     return {
       ok: false,
       status: 'continuity_failure',