feat(tasks): add recurrency and reminder write support to update_task (v1.1.0)

Verified parameters from JS-Bundle xb-Encoder/fc-Encoder now wired up:
recurrencyDescriptor (recurrency, recurrencyInterval, rrule) and reminder
(reminderUnit, reminderValue). Adds clear_recurrency and clear_reminder flags.
SPEC.md, CHANGELOG.md, CLAUDE.md updated accordingly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/mcp_familywall/server.py

@@ -926,6 +926,13 @@ def update_task(
     clear_due_date: bool = False,
     assignee_ids: list[str] | None = None,
     list_id: str | None = None,
+    recurrency: str | None = None,
+    recurrency_interval: int | None = None,
+    rrule: str | None = None,
+    clear_recurrency: bool = False,
+    reminder_unit: str | None = None,
+    reminder_value: int | None = None,
+    clear_reminder: bool = False,
 ) -> str:
     """Update an existing task's fields.
 
@@ -948,12 +955,40 @@ def update_task(
         list_id: Move the task to a different list by providing the target list ID
             from get_lists (e.g. ``"taskList/23431854_29740942"``). Omit to keep in
             current list.
+        recurrency: Recurrence frequency — ``"DAILY"``, ``"WEEKLY"``, ``"MONTHLY"``,
+            ``"YEARLY"``, or ``"NONE"``. Examples: daily → ``recurrency="DAILY",
+            recurrency_interval=1``; every 2 weeks on Friday →
+            ``recurrency="WEEKLY", recurrency_interval=2,
+            rrule="FREQ=WEEKLY;INTERVAL=2;BYDAY=FR"``.
+            Cannot be used together with *clear_recurrency*.
+        recurrency_interval: Repeat every N units (e.g. ``2`` for "every 2 weeks").
+            Only meaningful when *recurrency* is set.
+        rrule: Full iCalendar RRULE string (e.g. ``"FREQ=WEEKLY;INTERVAL=2;BYDAY=FR"``).
+            Overrides simple recurrency fields when set.
+        clear_recurrency: Set to ``True`` to remove the recurrence rule from the task.
+            Cannot be used together with *recurrency*.
+        reminder_unit: Unit for the reminder offset — ``"MINUTE"``, ``"HOUR"``, or
+            ``"DAY"``. Must be provided together with *reminder_value*. Requires a
+            *due_date* to be set on the task.
+        reminder_value: Offset before the due date/time (e.g. ``0`` = at the time,
+            ``15`` = 15 min before, ``1`` with unit ``"DAY"`` = 1 day before).
+            Must be provided together with *reminder_unit*.
+        clear_reminder: Set to ``True`` to remove the reminder from the task.
+            Cannot be used together with *reminder_unit*/*reminder_value*.
 
     Returns:
         JSON success indicator or an error message.
     """
     if clear_due_date and due_date is not None:
         return _err("'clear_due_date' and 'due_date' cannot be used together.")
+    if clear_recurrency and recurrency is not None:
+        return _err("'clear_recurrency' and 'recurrency' cannot be used together.")
+    if clear_reminder and (reminder_unit is not None or reminder_value is not None):
+        return _err(
+            "'clear_reminder' cannot be used together with 'reminder_unit'/'reminder_value'."
+        )
+    if (reminder_unit is None) != (reminder_value is None):
+        return _err("'reminder_unit' and 'reminder_value' must be provided together.")
 
     if (
         text is None
@@ -963,10 +998,16 @@ def update_task(
         and not clear_due_date
         and assignee_ids is None
         and list_id is None
+        and recurrency is None
+        and not clear_recurrency
+        and reminder_unit is None
+        and not clear_reminder
     ):
         return _err(
             "At least one of 'text', 'description', 'category_id', 'due_date',"
-            " 'clear_due_date', 'assignee_ids', or 'list_id' must be provided."
+            " 'clear_due_date', 'assignee_ids', 'list_id', 'recurrency',"
+            " 'clear_recurrency', 'reminder_unit'/'reminder_value', or"
+            " 'clear_reminder' must be provided."
         )
 
     params: dict[str, Any] = {"metaId": task_id}
@@ -986,6 +1027,33 @@ def update_task(
     if list_id is not None:
         params["taskListId"] = list_id
 
+    recurrency_descriptor: dict[str, Any] = {}
+    if clear_recurrency:
+        recurrency_descriptor["recurrency"] = "NONE"
+    elif recurrency is not None:
+        recurrency_descriptor["recurrency"] = recurrency
+        if recurrency_interval is not None:
+            recurrency_descriptor["recurrencyInterval"] = recurrency_interval
+        if rrule is not None:
+            recurrency_descriptor["rrule"] = rrule
+    if recurrency_descriptor:
+        params["recurrencyDescriptor"] = recurrency_descriptor
+
+    if clear_reminder:
+        params["reminder"] = {
+            "reminderUnit": "",
+            "reminderValue": 0,
+            "reminderType": "SNOOZE",
+            "localId": 0,
+        }
+    elif reminder_unit is not None and reminder_value is not None:
+        params["reminder"] = {
+            "reminderUnit": reminder_unit,
+            "reminderValue": reminder_value,
+            "reminderType": "SNOOZE",
+            "localId": 0,
+        }
+
     try:
         _authenticated_call("taskupdate2", params)
     except RuntimeError as exc: