custom_components/nestquest/__init__.py

@@ -496,6 +496,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
             hass,
             entry_id=entry.entry_id,
             database=database,
+            settings=settings,
             update_interval_seconds=entry.options.get(
                 CONF_UPDATE_INTERVAL, DEFAULT_UPDATE_INTERVAL
             ),

custom_components/nestquest/coordinator.py

@@ -11,6 +11,15 @@ refresh updates the whole board coherently.
 host clock and never UTC, matching the materialization and completion
 layers.
 
+The snapshot assembly itself lives in the Home-Assistant-free
+:mod:`custom_components.nestquest.core.snapshot` module
+(:func:`~core.snapshot.build_snapshot`); this coordinator is now a thin
+HA wrapper that resolves the local timezone and reads the settings handed
+into its constructor, then delegates to that builder, passing the SAME
+HA-local ``now`` it resolved in one clock read.  The API service's panel
+snapshot route shares the same builder, so both consumers render ONE
+snapshot shape.
+
 Presence is resolved through the SAME engine the materializer uses
 (:class:`~.presence.PresenceEngine`): schedules and overrides are read
 with the public DAO methods and the engine's anchor-date arithmetic
@@ -27,13 +36,11 @@ from __future__ import annotations
 
 import asyncio
 import datetime
-from dataclasses import dataclass
 from zoneinfo import ZoneInfo
 
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
 
-from .completion import derive_state
 from .const import (
     CONF_UPDATE_INTERVAL,
     DEFAULT_UPDATE_INTERVAL,
@@ -41,66 +48,21 @@ from .const import (
     LOGGER,
     MIN_UPDATE_INTERVAL,
 )
-from .dao_children import ChildrenDao
+from .core.db import NestQuestDatabase
-from .dao_instances import (
+from .core.settings import NestQuestSettings
-    CompletionEventsDao,
+from .core.snapshot import (
-    QuestInstancesDao,
+    ChildDaySnapshot,
-)
+    NestQuestSnapshot,
-from .dao_rules import QuestDefinitionsDao
+    QuestInstanceView,
-from .dao_presence import PresenceOverridesDao, PresenceSchedulesDao
+    build_snapshot,
-from .db import NestQuestDatabase
-from .presence import (
-    MAX_PREVIEW_SCAN_DAYS,
-    PresenceEngine,
-    PresenceOverride,
-    PresenceSchedule,
 )
 
-
+__all__ = [
-@dataclass(frozen=True)
+    "ChildDaySnapshot",
-class QuestInstanceView:
+    "NestQuestCoordinator",
-    """One instance plus everything the entities render from it."""
+    "NestQuestSnapshot",
-
+    "QuestInstanceView",
-    instance_id: int
+]
-    definition_id: int
-    child_id: int
-    title: str
-    icon: str | None
-    window: str
-    due_date: str
-    due_time: str | None
-    state: str  # open | done | missed
-    overdue: bool
-    completed_at: str | None
-    was_on_time: bool | None
-
-
-@dataclass(frozen=True)
-class ChildDaySnapshot:
-    """One active child's day: instances, presence, and rollup counts."""
-
-    child_id: int
-    child_name: str
-    instances: tuple[QuestInstanceView, ...]
-    present: bool
-    due_today: int
-    completed_today: int
-    remaining_today: int
-    completion_pct: int
-    #: For a child away today: the ISO date of their next present day
-    #: (the panel's away plate renders ``Returns <weekday>, <Mon D>``
-    #: from it).  ``None`` when the child is present today or no
-    #: present day exists within the presence engine's scan cap.
-    next_present: str | None = None
-
-
-@dataclass(frozen=True)
-class NestQuestSnapshot:
-    """The coordinator's whole-entity data payload."""
-
-    today_iso: str
-    children: tuple[ChildDaySnapshot, ...]
-    cycle_day: int
 
 
 class NestQuestCoordinator(DataUpdateCoordinator):
@@ -121,6 +83,7 @@ class NestQuestCoordinator(DataUpdateCoordinator):
         *,
         entry_id: str,
         database: NestQuestDatabase,
+        settings: NestQuestSettings,
         update_interval_seconds: int | None = None,
     ) -> None:
         interval = update_interval_seconds
@@ -138,6 +101,7 @@ class NestQuestCoordinator(DataUpdateCoordinator):
         )
         self.entry_id = entry_id
         self.database = database
+        self.settings = settings
         self._refresh_lock = asyncio.Lock()
 
     async def async_refresh(self) -> None:
@@ -153,140 +117,6 @@ class NestQuestCoordinator(DataUpdateCoordinator):
 
     async def _async_update_data(self) -> NestQuestSnapshot:
         now = self._local_now()
-        today = now.date()
+        return await build_snapshot(
-        today_iso = today.isoformat()
+            self.database, self.settings, now
-
-        children = await ChildrenDao(self.database).list_active()
-
-        schedules: dict[int, PresenceSchedule] = {}
-        overrides: dict[int, list[PresenceOverride]] = {}
-        for child in children:
-            schedule = await PresenceSchedulesDao(self.database).get_by_child(
-                child.id
-            )
-            if schedule is not None:
-                schedules[child.id] = PresenceSchedule.decode(
-                    child.id, schedule.anchor_date, schedule.pattern
-                )
-            window_end = today + datetime.timedelta(
-                days=MAX_PREVIEW_SCAN_DAYS
-            )
-            window_end_iso = window_end.isoformat()
-            ranged = await PresenceOverridesDao(
-                self.database
-            ).list_by_child_and_range(child.id, today_iso, window_end_iso)
-            if ranged:
-                # The engine validates MODEL objects, not DAO records;
-                # each record converts losslessly (the schema guarantees
-                # end >= start and a real is_present).
-                overrides[child.id] = [
-                    PresenceOverride(
-                        record.child_id,
-                        record.start_date,
-                        record.end_date,
-                        record.is_present,
-                        record.note,
-                    )
-                    for record in ranged
-                ]
-        engine = PresenceEngine(schedules, overrides)
-
-        instances_dao = QuestInstancesDao(self.database)
-        events_dao = CompletionEventsDao(self.database)
-        definitions_dao = QuestDefinitionsDao(self.database)
-
-        snapshots: list[ChildDaySnapshot] = []
-        for child in children:
-            instances = await instances_dao.list_by_date_range(
-                child.id, today_iso, today_iso
-            )
-            views: list[QuestInstanceView] = []
-            for instance in instances:
-                latest = await events_dao.get_latest_for_instance(instance.id)
-                definition = await definitions_dao.get(instance.definition_id)
-                state = derive_state(instance, latest, today)
-                overdue = False
-                if state == "open" and instance.due_date == today_iso:
-                    if instance.due_time is not None:
-                        due_moment = datetime.datetime.strptime(
-                            instance.due_time, "%H:%M"
-                        ).time()
-                        overdue = now.time() > due_moment
-                views.append(
-                    QuestInstanceView(
-                        instance_id=instance.id,
-                        definition_id=instance.definition_id,
-                        child_id=instance.child_id,
-                        title=definition.title if definition else "Quest",
-                        icon=definition.icon if definition else None,
-                        window=instance.window,
-                        due_date=instance.due_date,
-                        due_time=instance.due_time,
-                        state=state,
-                        overdue=overdue,
-                        completed_at=(
-                            latest.occurred_at
-                            if latest is not None
-                            and latest.event_type == "completed"
-                            else None
-                        ),
-                        was_on_time=(
-                            latest.was_on_time
-                            if latest is not None
-                            and latest.event_type == "completed"
-                            else None
-                        ),
-                    )
-                )
-            due = len(views)
-            completed = sum(1 for view in views if view.state == "done")
-            remaining = due - completed
-            child_present = engine.is_present(child.id, today)
-            next_present: str | None = None
-            if not child_present:
-                try:
-                    next_present = engine.next_present_dates(
-                        child.id, today, 1
-                    )[0].isoformat()
-                except ValueError:
-                    next_present = None
-            snapshots.append(
-                ChildDaySnapshot(
-                    child_id=child.id,
-                    child_name=child.display_name,
-                    instances=tuple(views),
-                    present=child_present,
-                    due_today=due,
-                    completed_today=completed,
-                    remaining_today=remaining,
-                    completion_pct=(
-                        round(completed * 100 / due) if due else 100
-                    ),
-                    next_present=next_present,
-                )
-            )
-
-        return NestQuestSnapshot(
-            today_iso=today_iso,
-            children=tuple(snapshots),
-            cycle_day=_cycle_day(schedules, children, today),
         )
-
-
-def _cycle_day(
-    schedules: dict[int, PresenceSchedule], children, today: datetime.date
-) -> int:
-    """Return today's 1-based day in the first scheduled child's cycle.
-
-    Anchor-date arithmetic ONLY (D-004): the day offset is computed from
-    the schedule's own anchor, never ISO week numbers or parity, so a
-    53-week year cannot silently invert the cycle.
-    """
-    for child in children:
-        schedule = schedules.get(child.id)
-        if schedule is None:
-            continue
-        days = (today - schedule.anchor_date).days
-        cycle_length = schedule.cycle_length_weeks * 7
-        return (days % cycle_length) + 1
-    return 0

custom_components/nestquest/core/snapshot.py

@@ -0,0 +1,306 @@
+"""Pure, Home-Assistant-free panel snapshot builder.
+
+The household snapshot the NestQuest panel renders — active children in
+sort order, each child's today-instances in the documented payload shape
+(missed instances OMITTED from the entity-facing attribute payload, but
+retained on the snapshot for the count rollups), per-child counts and
+presence, and the custody cycle day — used to be assembled inline inside
+:mod:`custom_components.nestquest.coordinator`'s
+``_async_update_data``.  That assembly is HA-coupled only because its
+host is a :class:`~homeassistant.helpers.update_coordinator.DataUpdateCoordinator`;
+the assembly itself touches no HA surface.
+
+This module holds the pure pieces — the snapshot dataclasses
+(:class:`QuestInstanceView`, :class:`ChildDaySnapshot`,
+:class:`NestQuestSnapshot`), the cycle-day helper (:func:`_cycle_day`),
+the panel payload shaper (:func:`instance_payload`), and the async
+:func:`build_snapshot` builder — so the HA coordinator and the API
+service's panel snapshot route share ONE implementation of both the
+snapshot assembly and the entity-facing attribute payload shape.
+Nothing here imports :mod:`homeassistant`; the builder takes the
+database, the settings object, and the HA-local ``now`` (a single
+clock read the caller already resolved, from which it derives
+``today``) and returns the snapshot, mirroring exactly what the
+coordinator used to do inline.
+
+``settings`` is accepted because the API route hands in the entry's
+:class:`~.settings.NestQuestSettings`; it is CURRENTLY UNUSED — the
+assembly reads nothing from it — and is retained so the builder's
+contract stays stable if a future panel feature derives scan caps or
+rollup behaviour from configuration.  No speculative read is wired in.
+"""
+from __future__ import annotations
+
+import datetime
+from collections.abc import Iterable
+from dataclasses import dataclass
+from typing import Any
+
+from .completion import derive_state
+from .dao_children import ChildrenDao
+from .dao_instances import CompletionEventsDao, QuestInstancesDao
+from .dao_presence import PresenceOverridesDao, PresenceSchedulesDao
+from .dao_rules import QuestDefinitionsDao
+from .db import NestQuestDatabase
+from .presence import (
+    MAX_PREVIEW_SCAN_DAYS,
+    PresenceEngine,
+    PresenceOverride,
+    PresenceSchedule,
+)
+from .settings import NestQuestSettings
+
+
+@dataclass(frozen=True)
+class QuestInstanceView:
+    """One instance plus everything the entities render from it."""
+
+    instance_id: int
+    definition_id: int
+    child_id: int
+    title: str
+    icon: str | None
+    window: str
+    due_date: str
+    due_time: str | None
+    state: str  # open | done | missed
+    overdue: bool
+    completed_at: str | None
+    was_on_time: bool | None
+
+
+@dataclass(frozen=True)
+class ChildDaySnapshot:
+    """One active child's day: instances, presence, and rollup counts."""
+
+    child_id: int
+    child_name: str
+    instances: tuple[QuestInstanceView, ...]
+    present: bool
+    due_today: int
+    completed_today: int
+    remaining_today: int
+    completion_pct: int
+    #: For a child away today: the ISO date of their next present day
+    #: (the panel's away plate renders ``Returns <weekday>, <Mon D>``
+    #: from it).  ``None`` when the child is present today or no
+    #: present day exists within the presence engine's scan cap.
+    next_present: str | None = None
+
+
+@dataclass(frozen=True)
+class NestQuestSnapshot:
+    """The coordinator's whole-entity data payload."""
+
+    today_iso: str
+    children: tuple[ChildDaySnapshot, ...]
+    cycle_day: int
+
+
+def _cycle_day(
+    schedules: dict[int, PresenceSchedule], children, today: datetime.date
+) -> int:
+    """Return today's 1-based day in the first scheduled child's cycle.
+
+    Anchor-date arithmetic ONLY (D-004): the day offset is computed from
+    the schedule's own anchor, never ISO week numbers or parity, so a
+    53-week year cannot silently invert the cycle.
+    """
+    for child in children:
+        schedule = schedules.get(child.id)
+        if schedule is None:
+            continue
+        days = (today - schedule.anchor_date).days
+        cycle_length = schedule.cycle_length_weeks * 7
+        return (days % cycle_length) + 1
+    return 0
+
+
+def instance_payload(
+    instances: Iterable[QuestInstanceView], *, include_missed: bool
+) -> list[dict[str, Any]]:
+    """Shape instance dicts per ENTITIES-AND-SERVICES.md §1.
+
+    The panel payload ``state`` is the documented ``open`` | ``completed``
+    spelling, so the builder's derived ``done`` maps to ``completed`` here;
+    ``open`` passes through.  ``missed`` instances are OMITTED from the
+    entity-facing attribute payload (decision 5) unless ``include_missed``
+    is set — the admin payload (D-009) keeps them with their ``missed``
+    state.  ``on_time`` passes the builder's ``was_on_time`` through
+    verbatim (``True`` / ``False`` for a completed instance, ``None`` for
+    an open one).  This is the SINGLE shared implementation both the HA
+    sensor layer and the API panel route read; it touches no Home
+    Assistant surface.
+    """
+    payload: list[dict[str, Any]] = []
+    for view in instances:
+        if view.state == "missed" and not include_missed:
+            continue
+        payload.append(
+            {
+                "id": view.instance_id,
+                "definition_id": view.definition_id,
+                "child_id": view.child_id,
+                "title": view.title,
+                "icon": view.icon,
+                "window": view.window,
+                "due_time": view.due_time,
+                "state": (
+                    "completed" if view.state == "done" else view.state
+                ),
+                "overdue": view.overdue,
+                "completed_at": view.completed_at,
+                "on_time": view.was_on_time,
+            }
+        )
+    return payload
+
+
+async def build_snapshot(
+    database: NestQuestDatabase,
+    settings: NestQuestSettings,
+    now: datetime.datetime,
+) -> NestQuestSnapshot:
+    """Build the household panel snapshot for ``today`` at the ``now`` instant.
+
+    Mirrors the assembly that lived in the coordinator's
+    ``_async_update_data``: active children in sort order, each child's
+    today-instances with derived state (open / done / missed via
+    :func:`~.completion.derive_state`) and the overdue flag, per-child
+    presence (resolved through :class:`~.presence.PresenceEngine`), the
+    per-child rollup counts, and the custody cycle day of the first
+    scheduled active child.  Missed instances are retained on the
+    snapshot (the rollup counts and the panel's missed plate need them)
+    but the entity-facing attribute payload omits them at the
+    :func:`instance_payload` layer — this builder produces the shared
+    shape both consumers read.
+
+    ``now`` is the HA-local timezone-aware datetime the caller already
+    resolved (a SINGLE clock read); the overdue check compares
+    ``now.time()`` against the instance's ``due_time`` for today's open
+    instances.  The builder performs NO internal clock read — it never
+    calls :func:`datetime.datetime.now` — so the instant is pinned in
+    tests.  ``today`` is derived INSIDE the builder as ``now.date()``,
+    so the calendar date that anchors the due-date and cycle-day
+    arithmetic is always the SAME clock read as the wall-clock time;
+    the two can never disagree.  ``settings`` is accepted but currently
+    unused (see the module docstring).
+    """
+    today = now.date()
+    today_iso = today.isoformat()
+
+    children = await ChildrenDao(database).list_active()
+
+    schedules: dict[int, PresenceSchedule] = {}
+    overrides: dict[int, list[PresenceOverride]] = {}
+    for child in children:
+        schedule = await PresenceSchedulesDao(database).get_by_child(
+            child.id
+        )
+        if schedule is not None:
+            schedules[child.id] = PresenceSchedule.decode(
+                child.id, schedule.anchor_date, schedule.pattern
+            )
+        window_end = today + datetime.timedelta(
+            days=MAX_PREVIEW_SCAN_DAYS
+        )
+        window_end_iso = window_end.isoformat()
+        ranged = await PresenceOverridesDao(
+            database
+        ).list_by_child_and_range(child.id, today_iso, window_end_iso)
+        if ranged:
+            # The engine validates MODEL objects, not DAO records;
+            # each record converts losslessly (the schema guarantees
+            # end >= start and a real is_present).
+            overrides[child.id] = [
+                PresenceOverride(
+                    record.child_id,
+                    record.start_date,
+                    record.end_date,
+                    record.is_present,
+                    record.note,
+                )
+                for record in ranged
+            ]
+    engine = PresenceEngine(schedules, overrides)
+
+    instances_dao = QuestInstancesDao(database)
+    events_dao = CompletionEventsDao(database)
+    definitions_dao = QuestDefinitionsDao(database)
+
+    snapshots: list[ChildDaySnapshot] = []
+    for child in children:
+        instances = await instances_dao.list_by_date_range(
+            child.id, today_iso, today_iso
+        )
+        views: list[QuestInstanceView] = []
+        for instance in instances:
+            latest = await events_dao.get_latest_for_instance(instance.id)
+            definition = await definitions_dao.get(instance.definition_id)
+            state = derive_state(instance, latest, today)
+            overdue = False
+            if state == "open" and instance.due_date == today_iso:
+                if instance.due_time is not None:
+                    due_moment = datetime.datetime.strptime(
+                        instance.due_time, "%H:%M"
+                    ).time()
+                    overdue = now.time() > due_moment
+            views.append(
+                QuestInstanceView(
+                    instance_id=instance.id,
+                    definition_id=instance.definition_id,
+                    child_id=instance.child_id,
+                    title=definition.title if definition else "Quest",
+                    icon=definition.icon if definition else None,
+                    window=instance.window,
+                    due_date=instance.due_date,
+                    due_time=instance.due_time,
+                    state=state,
+                    overdue=overdue,
+                    completed_at=(
+                        latest.occurred_at
+                        if latest is not None
+                        and latest.event_type == "completed"
+                        else None
+                    ),
+                    was_on_time=(
+                        latest.was_on_time
+                        if latest is not None
+                        and latest.event_type == "completed"
+                        else None
+                    ),
+                )
+            )
+        due = len(views)
+        completed = sum(1 for view in views if view.state == "done")
+        remaining = due - completed
+        child_present = engine.is_present(child.id, today)
+        next_present: str | None = None
+        if not child_present:
+            try:
+                next_present = engine.next_present_dates(
+                    child.id, today, 1
+                )[0].isoformat()
+            except ValueError:
+                next_present = None
+        snapshots.append(
+            ChildDaySnapshot(
+                child_id=child.id,
+                child_name=child.display_name,
+                instances=tuple(views),
+                present=child_present,
+                due_today=due,
+                completed_today=completed,
+                remaining_today=remaining,
+                completion_pct=(
+                    round(completed * 100 / due) if due else 100
+                ),
+                next_present=next_present,
+            )
+        )
+
+    return NestQuestSnapshot(
+        today_iso=today_iso,
+        children=tuple(snapshots),
+        cycle_day=_cycle_day(schedules, children, today),
+    )

custom_components/nestquest/sensor.py

@@ -39,6 +39,7 @@ from .coordinator import (
     NestQuestCoordinator,
     QuestInstanceView,
 )
+from .core.snapshot import instance_payload
 
 #: Home Assistant's state machine refuses states longer than 255
 #: characters (its hard recorder/state limit).  These sensors' states
@@ -63,40 +64,6 @@ def _state_within_limit(state: Any) -> Any:
     return state
 
 
-def _instance_payload(
-    instances: Iterable[QuestInstanceView], *, include_missed: bool
-) -> list[dict[str, Any]]:
-    """Shape instance dicts per ENTITIES-AND-SERVICES.md §1.
-
-    ``state`` maps the coordinator's derived ``done`` to the panel's
-    ``completed`` spelling; ``missed`` instances are omitted unless
-    ``include_missed`` (the admin payload, D-009, keeps them with
-    their ``missed`` state).
-    """
-    payload: list[dict[str, Any]] = []
-    for view in instances:
-        if view.state == "missed" and not include_missed:
-            continue
-        payload.append(
-            {
-                "id": view.instance_id,
-                "definition_id": view.definition_id,
-                "child_id": view.child_id,
-                "title": view.title,
-                "icon": view.icon,
-                "window": view.window,
-                "due_time": view.due_time,
-                "state": (
-                    "completed" if view.state == "done" else view.state
-                ),
-                "overdue": view.overdue,
-                "completed_at": view.completed_at,
-                "on_time": view.was_on_time,
-            }
-        )
-    return payload
-
-
 #: State reported by the next-quest sensor when the child owes nothing
 #: else today.  A documented sentinel, never an empty string (an empty
 #: state reads as "sensor went unavailable" in HA).
@@ -215,10 +182,10 @@ class NestQuestQuestsDueTodaySensor(_NestQuestChildDaySensor):
         if child is None:
             return None
         return {
-            "instances": _instance_payload(
+            "instances": instance_payload(
                 child.instances, include_missed=False
             ),
-            "admin_instances": _instance_payload(
+            "admin_instances": instance_payload(
                 child.instances, include_missed=True
             ),
             "child_id": child.child_id,

tests/test_core_snapshot.py

@@ -0,0 +1,306 @@
+"""Test the pure panel snapshot builder (task 9047a97b).
+
+The snapshot assembly that lived inline in the coordinator's
+``_async_update_data`` was extracted into the Home-Assistant-free
+:func:`custom_components.nestquest.core.snapshot.build_snapshot`, and
+the panel payload shaper (:func:`instance_payload`) with it.  These
+tests seed a household and assert the pure builder's output against
+EXPLICIT literal expected values — not self-equality — so the AWAY
+child's ``next_present``, a due-timed quest's ``overdue`` under a
+pinned ``now``, the custody ``cycle_day`` (> 1), and the panel payload
+dict shape (``done`` -> ``completed``, ``on_time`` passthrough, and
+``missed`` omission) are all exercised as literals.
+"""
+from __future__ import annotations
+
+import datetime
+from zoneinfo import ZoneInfo
+
+from conftest import wire_entry_to_registry
+
+from custom_components.nestquest import async_setup_entry
+from custom_components.nestquest.children import create_child
+from custom_components.nestquest.completion import complete_instance
+from custom_components.nestquest.core.snapshot import (
+    ChildDaySnapshot,
+    NestQuestSnapshot,
+    QuestInstanceView,
+    build_snapshot,
+    instance_payload,
+)
+from custom_components.nestquest.dao_instances import QuestInstancesDao
+from custom_components.nestquest.dao_presence import (
+    PresenceOverridesDao,
+    PresenceSchedulesDao,
+)
+from custom_components.nestquest.materialize import materialize
+from custom_components.nestquest.quest_definitions import create_quest_definition
+from custom_components.nestquest.recurrence import ScheduleRule
+
+
+async def test_instance_payload_shape_and_missed_omission() -> None:
+    """``instance_payload`` is the documented panel shape (§1).
+
+    ``done`` maps to ``completed``; ``open`` passes through; ``on_time``
+    is the builder's ``was_on_time`` verbatim; ``missed`` instances are
+    omitted unless ``include_missed`` (the admin payload, D-009).
+    """
+    def view(state: str, *, overdue: bool = False, on_time: bool | None = None,
+             completed_at: str | None = None, instance_id: int = 1) -> QuestInstanceView:
+        return QuestInstanceView(
+            instance_id=instance_id,
+            definition_id=10,
+            child_id=3,
+            title="Fill bird feeder",
+            icon="bird",
+            window="afternoon",
+            due_date="2026-09-21",
+            due_time="17:00",
+            state=state,
+            overdue=overdue,
+            completed_at=completed_at,
+            was_on_time=on_time,
+        )
+
+    open_view = view("open", overdue=True)
+    done_view = view("done", on_time=True, completed_at="2026-09-21T12:00:00+00:00")
+    missed_view = view("missed", instance_id=2)
+
+    panel = instance_payload([open_view, done_view, missed_view], include_missed=False)
+    assert panel == [
+        {
+            "id": 1,
+            "definition_id": 10,
+            "child_id": 3,
+            "title": "Fill bird feeder",
+            "icon": "bird",
+            "window": "afternoon",
+            "due_time": "17:00",
+            "state": "open",
+            "overdue": True,
+            "completed_at": None,
+            "on_time": None,
+        },
+        {
+            "id": 1,
+            "definition_id": 10,
+            "child_id": 3,
+            "title": "Fill bird feeder",
+            "icon": "bird",
+            "window": "afternoon",
+            "due_time": "17:00",
+            "state": "completed",
+            "overdue": False,
+            "completed_at": "2026-09-21T12:00:00+00:00",
+            "on_time": True,
+        },
+    ], "panel payload omits missed and spells done as completed"
+
+    admin = instance_payload(
+        [open_view, done_view, missed_view], include_missed=True
+    )
+    assert len(admin) == 3
+    assert admin[2]["state"] == "missed", (
+        "admin payload keeps missed instances with their missed state"
+    )
+
+
+async def test_build_snapshot_explicit_values(hass, make_entry, monkeypatch) -> None:
+    """The builder produces the documented shape as literals, pinned in time.
+
+    Ada is AWAY today (a 2-week schedule whose absent week 0 covers today,
+    plus a presence override marking her present on today+2) so
+    ``present`` is False and ``next_present`` is the override date.  Her
+    open quest due at 10:00 is OVERDUE under the pinned 12:00 ``now``.
+    Bo's quest due at 17:00 is completed at 12:00 (on time) so its
+    payload ``state`` is ``completed`` and ``on_time`` is True.  The first
+    scheduled active child is Ada, whose 2-week cycle anchored one day
+    before today puts ``cycle_day`` at 2.
+    """
+    entry = wire_entry_to_registry(make_entry(), hass.registry)
+    assert await async_setup_entry(hass, entry) is True
+    coordinator = entry.runtime_data.coordinator
+    database = entry.runtime_data.database
+    settings = entry.runtime_data.settings
+
+    # Single clock read for the seed/snapshot anchor (no midnight skew).
+    today = coordinator._local_now().date()
+    time_zone = ZoneInfo(hass.config.time_zone)
+    # Pin the build instant at 12:00 local: past Ada's 10:00 due time
+    # (overdue) and before Bo's 17:00, and the completion moment for Bo.
+    pinned_now = datetime.datetime(
+        today.year, today.month, today.day, 12, 0, 0, tzinfo=time_zone
+    )
+    today_iso = today.isoformat()
+
+    ada = await create_child(database, "Ada")
+    bo = await create_child(database, "Bo")
+
+    await create_quest_definition(
+        database,
+        "Pack bag",
+        ScheduleRule.from_dict(
+            {"rule_type": "daily", "start_date": today_iso}
+        ),
+        [ada.id],
+        [("morning", "10:00")],
+    )
+    await create_quest_definition(
+        database,
+        "Brush teeth",
+        ScheduleRule.from_dict(
+            {"rule_type": "daily", "start_date": today_iso}
+        ),
+        [bo.id],
+        [("morning", "17:00")],
+    )
+    end = (today + datetime.timedelta(days=3)).isoformat()
+    await materialize(database, today_iso, end, today=today)
+
+    # Ada: 2-week cycle anchored yesterday. Week 0 (the empty segment)
+    # covers today, so she is absent today; an override marks her present
+    # on today+2, so next_present resolves to that date and cycle_day is
+    # ((today - (today-1)) % 14) + 1 == 2.
+    await PresenceSchedulesDao(database).upsert_by_child(
+        ada.id,
+        cycle_length_weeks=2,
+        anchor_date=(today - datetime.timedelta(days=1)).isoformat(),
+        pattern="|0,1,2,3,4,5,6",
+    )
+    returns_date = today + datetime.timedelta(days=2)
+    await PresenceOverridesDao(database).create(
+        ada.id,
+        returns_date.isoformat(),
+        returns_date.isoformat(),
+        is_present=True,
+        note="visit",
+    )
+
+    # Complete Bo's instance at the pinned 12:00 (17:00 due => on time).
+    bo_instances = await QuestInstancesDao(database).list_by_child_and_date(
+        bo.id, today_iso
+    )
+    await complete_instance(
+        database,
+        bo_instances[0].id,
+        actor_source="panel",
+        actor_child_id=bo.id,
+        now=pinned_now,
+        today=today,
+    )
+
+    built = await build_snapshot(database, settings, pinned_now)
+
+    assert isinstance(built, NestQuestSnapshot)
+    assert built.today_iso == today_iso
+    assert built.cycle_day == 2, (
+        "Ada's 2-week cycle anchored yesterday => day 2 today"
+    )
+
+    by_id = {child.child_id: child for child in built.children}
+    assert list(by_id) == [ada.id, bo.id], (
+        "active children appear in sort_order, id order"
+    )
+    ada_child = by_id[ada.id]
+    bo_child = by_id[bo.id]
+
+    # Ada: away today, returns on the override date, one open+overdue quest.
+    assert isinstance(ada_child, ChildDaySnapshot)
+    assert ada_child.present is False
+    assert ada_child.next_present == returns_date.isoformat()
+    assert ada_child.due_today == 1
+    assert ada_child.completed_today == 0
+    assert ada_child.remaining_today == 1
+    assert ada_child.completion_pct == 0
+    ada_view = ada_child.instances[0]
+    assert isinstance(ada_view, QuestInstanceView)
+    assert ada_view.state == "open"
+    assert ada_view.due_time == "10:00"
+    assert ada_view.overdue is True, "12:00 now is past the 10:00 due time"
+    assert ada_view.completed_at is None
+    assert ada_view.was_on_time is None
+
+    # Bo: present, one completed instance, on time, not overdue.
+    assert bo_child.present is True
+    assert bo_child.next_present is None
+    assert bo_child.due_today == 1
+    assert bo_child.completed_today == 1
+    assert bo_child.remaining_today == 0
+    assert bo_child.completion_pct == 100
+    bo_view = bo_child.instances[0]
+    assert bo_view.state == "done"
+    assert bo_view.due_time == "17:00"
+    assert bo_view.overdue is False, "overdue is only computed for open state"
+    assert bo_view.completed_at == pinned_now.astimezone(
+        datetime.timezone.utc
+    ).isoformat()
+    assert bo_view.was_on_time is True
+
+    # Panel payload shape: Ada open+overdue stays open; Bo done -> completed.
+    ada_payload = instance_payload(ada_child.instances, include_missed=False)
+    assert ada_payload == [
+        {
+            "id": ada_view.instance_id,
+            "definition_id": ada_view.definition_id,
+            "child_id": ada.id,
+            "title": "Pack bag",
+            "icon": None,
+            "window": "morning",
+            "due_time": "10:00",
+            "state": "open",
+            "overdue": True,
+            "completed_at": None,
+            "on_time": None,
+        }
+    ]
+    bo_payload = instance_payload(bo_child.instances, include_missed=False)
+    assert bo_payload == [
+        {
+            "id": bo_view.instance_id,
+            "definition_id": bo_view.definition_id,
+            "child_id": bo.id,
+            "title": "Brush teeth",
+            "icon": None,
+            "window": "morning",
+            "due_time": "17:00",
+            "state": "completed",
+            "overdue": False,
+            "completed_at": pinned_now.astimezone(
+                datetime.timezone.utc
+            ).isoformat(),
+            "on_time": True,
+        }
+    ]
+
+    # Missed omission is real: a missed view is dropped from the panel
+    # payload and kept in the admin payload with its missed state.
+    missed_view = QuestInstanceView(
+        instance_id=999,
+        definition_id=10,
+        child_id=ada.id,
+        title="Stale quest",
+        icon=None,
+        window="morning",
+        due_date=(today - datetime.timedelta(days=1)).isoformat(),
+        due_time="09:00",
+        state="missed",
+        overdue=False,
+        completed_at=None,
+        was_on_time=None,
+    )
+    assert instance_payload([missed_view], include_missed=False) == []
+    assert (
+        instance_payload([missed_view], include_missed=True)[0]["state"]
+        == "missed"
+    )
+
+    # REQUIRED wrapper tie-in: the coordinator's _async_update_data is a
+    # thin WRAPPER over build_snapshot, so pinning its clock to the SAME
+    # pinned_now the builder was called with must reproduce the builder's
+    # snapshot byte-for-byte.  The dataclasses are frozen, so == is a full
+    # deep compare — a wrapper that mis-passed today vs now, or stopped
+    # calling the builder, would diverge here even though the literal
+    # assertions above still pass.
+    monkeypatch.setattr(coordinator, "_local_now", lambda: pinned_now)
+    await coordinator.async_refresh()
+    assert coordinator.data == built

tests/test_entity_matrix.py

@@ -186,18 +186,18 @@ async def test_entity_and_event_matrix(hass, make_entry) -> None:
     original_refresh = coordinator._async_update_data
 
     async def _future_dated_refresh():
-        import custom_components.nestquest.coordinator as coordinator_module
+        import custom_components.nestquest.core.snapshot as snapshot_module
 
-        real_derive = coordinator_module.derive_state
+        real_derive = snapshot_module.derive_state
 
         def _derive(instance, latest, today):
             return real_derive(instance, latest, today + datetime.timedelta(days=1))
 
-        coordinator_module.derive_state = _derive
+        snapshot_module.derive_state = _derive
         try:
             return await original_refresh()
         finally:
-            coordinator_module.derive_state = real_derive
+            snapshot_module.derive_state = real_derive
 
     coordinator._async_update_data = _future_dated_refresh
     await coordinator.async_refresh()

tests/test_sensors.py

@@ -238,16 +238,16 @@ async def test_due_today_payload_omits_missed_for_panel_includes_for_admin(
     entry, coordinator, (ada, bo, cory) = await _setup_seeded_entry(
         hass, make_entry
     )
-    import custom_components.nestquest.coordinator as coordinator_module
+    import custom_components.nestquest.core.snapshot as snapshot_module
 
     tomorrow = _today() + datetime.timedelta(days=1)
-    real_derive_state = coordinator_module.derive_state
+    real_derive_state = snapshot_module.derive_state
 
     def _derive_against_pinned_future(instance, latest, today):
         return real_derive_state(instance, latest, tomorrow)
 
     monkeypatch.setattr(
-        coordinator_module, "derive_state", _derive_against_pinned_future
+        snapshot_module, "derive_state", _derive_against_pinned_future
     )
     await coordinator.async_refresh()