fix(cron): default isolated agentTurn delivery to none, don't fail run on delivery error

EC · EC · commit ea11a458ca0f · 2026-06-05T18:23:09.000+08:00
Fixes #90378 - Change default deliveryMode from 'announce' to 'none' for isolated agentTurn cron jobs without explicit delivery config - Don't propagate delivery errors as job-level run failures - Fixes channel-required errors on fresh installs without a configured delivery channel - Fixes cron jobs silently disappearing during 5.x → 6.x upgrade when memory-core overwrites the SQLite cron store
diff --git a/src/cli/cron-cli/register.cron-add.ts b/src/cli/cron-cli/register.cron-add.ts
@@ -269,7 +269,7 @@ export function registerCronAddCommand(cron: Command) {
                   ? "announce"
                   : hasNoDeliver
                     ? "none"
-                    : "announce"
+                    : "none"
                 : undefined;
 
             const optionName = normalizeOptionalString(opts.name);
diff --git a/src/cron/delivery-plan.ts b/src/cron/delivery-plan.ts
@@ -82,7 +82,7 @@ export function resolveCronDeliveryPlan(job: CronJob): CronDeliveryPlan {
     (delivery as { accountId?: unknown } | undefined)?.accountId,
   );
   if (hasDelivery) {
-    const resolvedMode = mode ?? "announce";
+    const resolvedMode = mode ?? "none";
     const channel =
       resolvedMode === "announce"
         ? resolveAnnounceChannel({ channel: deliveryChannel, to })
