fix(schedule): close fixed-rate review gaps

packages/schedule/tool-schedule/src/domain.ts

@@ -641,6 +641,13 @@ export function foldScheduleEvents(
       }
     }
   }
+  // A gate beyond the supported time profile can never admit another Every batch.
+  if (lastRecurringAcceptedAt !== undefined
+    && Date.parse(lastRecurringAcceptedAt) + MIN_RECURRING_INTERVAL_SECONDS * 1_000 > MAX_FOUR_DIGIT_YEAR_MS) {
+    for (const [id, record] of active) {
+      if (record.kind === 'every') active.delete(id)
+    }
+  }
   return Object.freeze({
     active: Object.freeze([...active.values()]),
     seenIds: Object.freeze([...seen]),
@@ -801,7 +808,8 @@ export function createEveryScheduleRecord(
   const interval = everySeconds * 1_000
   const target = now + interval
   if (!Number.isSafeInteger(now) || !Number.isSafeInteger(interval)
-    || !Number.isSafeInteger(target) || target <= now || target > MAX_FOUR_DIGIT_YEAR_MS) {
+    || !Number.isSafeInteger(target) || target <= now
+    || target < MIN_FOUR_DIGIT_YEAR_MS || target > MAX_FOUR_DIGIT_YEAR_MS) {
     throw new ScheduleInputError(
       'time_out_of_range',
       'The scheduled time must be representable as a four-digit-year RFC 3339 UTC instant.',

packages/schedule/tool-schedule/src/index.ts

@@ -1,5 +1,5 @@
 /**
- * Agent-scoped durable one-shot reminders over the session event log.
+ * Agent-scoped durable one-shot and fixed-rate reminders over the session event log.
  * @module @deepseek-ai/dsh-tool-schedule
  */
 

packages/schedule/tool-schedule/src/runtime.ts

@@ -68,6 +68,7 @@ function dueDecision(folded: FoldedSchedules, now: number): DueDecision {
   }
 
   const future = folded.active
+    .filter(record => recurring.length === 0 || record.kind !== 'every')
     .map(record => Date.parse(record.scheduledAt))
     .filter(target => target > now)
   if (recurring.length > 0) future.push(gate)

packages/schedule/tool-schedule/src/types.ts

@@ -120,6 +120,16 @@ export type ScheduleView = ScheduleRecord & {
   readonly deliveryNotBefore?: string
 }
 
+/** JSON-compatible Web receipt derived from one durable dispatch. */
+export interface ScheduleReminderPresentation {
+  /** Session-local reminder identity. */
+  readonly scheduleId: ScheduleId
+  /** Original user-authored reminder content. */
+  readonly prompt: string
+  /** Scheduled occurrence represented by the dispatch. */
+  readonly occurrenceAt: string
+}
+
 /** Management operations whose persistence barrier may be uncertain. */
 export type SchedulePersistenceOperation = 'create' | 'list' | 'delete'