diff --git a/backend/app/api/http/sessions.py b/backend/app/api/http/sessions.py
index 9f3defd..c22ddb6 100644
--- a/backend/app/api/http/sessions.py
+++ b/backend/app/api/http/sessions.py
@@ -29,7 +29,8 @@ from app.scoring.export import to_csv, to_pdf
 from app.scoring.report import build as build_report
 from app.session.access import can_access
 from app.session.checkpoint import load_state
-from app.session.finish import override_score, scoring_scenario
+from app.session.finish import override_score
+from app.session.score import scoring_scenario
 from app.session.hub import hub
 from app.session.store import ScoreOverridden, apply_score_override
 from app.voice.recording import recording_path
diff --git a/backend/app/session/finish.py b/backend/app/session/finish.py
index 405183d..7d7f64a 100644
--- a/backend/app/session/finish.py
+++ b/backend/app/session/finish.py
@@ -12,22 +12,18 @@ import logging
 import time
 from uuid import UUID
 
-from app.domain.events import CallEnded, CallEndReason, Exercise, Metric, ScoreReady, SessionEnded
+from app.domain.events import CallEnded, CallEndReason, Exercise, ScoreReady, SessionEnded
 from app.domain.statuses import ServiceStatus, current
-from app.domain.taxonomy import Competency, ErrorCode, Finding, FindingSource
 from app.domain.timers import TimerCode
-from app.scenarios import store
 from app.scoring.ai_coach import coach
-from app.scoring.card import evaluate_card
-from app.scoring.competency import radar
 from app.scoring.dispatcher import dispatcher_metrics, evaluate_dispatcher
-from app.scoring.gost import GostResult, evaluate
+from app.scoring.gost import GostResult
 from app.scoring.grammar import assess
 from app.scoring.report import build as build_report
-from app.scoring.taxonomy import METRIC_WEIGHTS
-from app.scoring.timing import time_credit
+from app.scoring.timing import DDS_WORK_TIME, time_metric
 from app.scoring.weights import apply_weights
 from app.session.hub import hub
+from app.session.score import ScoringSnapshot, score_session, scoring_scenario
 from app.session.state import DdsCardRecord, DdsLiveCard, now_utc
 from app.session.store import (
     LessonEnded,
@@ -77,39 +73,12 @@ def score_dds_card(state, card: DdsLiveCard) -> DdsCardRecord:
         }
         for service in services
     )
-    work_passed = terminal and work_elapsed_ms is not None and work_elapsed_ms <= work_limit_ms
-    work_delta_ms = (work_elapsed_ms - work_limit_ms) if work_elapsed_ms is not None else None
-    if work_elapsed_ms is None:
-        work_fact = "время обработки не зафиксировано"
-    elif work_delta_ms and work_delta_ms > 0:
-        work_fact = f"{round(work_elapsed_ms / 1000)} с (+{round(work_delta_ms / 1000)} с сверх норматива)"
-    elif work_delta_ms and work_delta_ms < 0:
-        work_fact = (f"{round(work_elapsed_ms / 1000)} с (на "
-                     f"{round(abs(work_delta_ms) / 1000)} с быстрее норматива)")
-    else:
-        work_fact = f"{round(work_elapsed_ms / 1000)} с (точно в норматив)"
-    if not terminal:
-        work_fact = f"карточка не завершена; {work_fact}"
-    weighted.metrics.append(Metric(
-        key="dds_work_time",
-        title="Отработка карточки ДДС",
-        fact=work_fact,
-        norm=f"завершить за {round(work_limit_ms / 1000)} с",
-        ref="ТЗ задачи № 9; сессия вопросов и ответов 16.09.2026",
-        passed=work_passed,
-        weight=METRIC_WEIGHTS["dds_work_time"],
-        credit=time_credit(work_elapsed_ms, work_limit_ms) if terminal else 0.0,
-    ))
-    if not work_passed:
-        weighted.findings.append(Finding(
-            code=ErrorCode.E3,
-            source=FindingSource.TIMERS,
-            summary="ДДС: норматив времени отработки карточки не выполнен",
-            fact=work_fact,
-            norm=f"завершить за {round(work_limit_ms / 1000)} с",
-            ref="ТЗ задачи № 9; сессия вопросов и ответов 16.09.2026",
-            competency=Competency.NORMS,
-        ))
+    work_metric, work_finding = time_metric(
+        DDS_WORK_TIME, work_elapsed_ms, work_limit_ms, completed=terminal
+    )
+    weighted.metrics.append(work_metric)
+    if work_finding is not None:
+        weighted.findings.append(work_finding)
     apply_weights(weighted, {**card.scenario.score_weights, **state.criteria.score_weights})
     actions = [
         {"type": "card.status", "service": mark.service, "status": mark.status.value,
@@ -149,20 +118,6 @@ def score_dds_card(state, card: DdsLiveCard) -> DdsCardRecord:
     )
 
 
-def scoring_scenario(state):
-    """Сценарий, по которому оценивается и разбирается занятие.
-
-    После передачи 112→ДДС КИО курсанта оценивается по эталону упражнения
-    112. Балл, разбор и чек-лист самооценки обязаны брать один и тот же
-    сценарий.
-    """
-    if state.handoff_to_dds and state.operator_scenario:
-        return state.operator_scenario
-    if state.scenario is None and state.desk.scenarios:
-        return state.desk.scenarios[0]
-    return state.scenario or store.get(state.scenario_id)
-
-
 def score_live_dds_cards(state) -> list[DdsCardRecord]:
     """Все карточки занятия: завершённые и оценка ещё открытых.
 
@@ -182,185 +137,30 @@ async def finish(session_id: UUID, state) -> None:
     if state.recorder is not None:
         path = await asyncio.to_thread(state.recorder.finalize)
         state.recording_path = str(path) if path else None
+    # Все карточки выданы одновременно: при досрочном завершении оцениваем
+    # каждую, включая не открытую, потому что её норматив уже шёл.
+    if state.exercise is Exercise.DDS or (state.handoff_to_dds and state.desk.scenarios):
+        score_live_dds_cards(state)
     # Сценарий занятия, а не библиотечный: директивы могли поправить эталон.
-    scenario = scoring_scenario(state)
-    if scenario is None:
+    snapshot = ScoringSnapshot.of(state)
+    if snapshot is None:
         return
-
-    cards: list[DdsCardRecord] = []
-    if state.exercise is Exercise.CARD:
-        result = evaluate_card(
-            scenario, state.operator_kio or state.dispatched_card or state.kio
-        )
-        limit_ms = state.timers.limits[TimerCode.CARD_FILL]
-        elapsed_ms = state.timers.measured_ms(TimerCode.CARD_FILL)
-        submitted = state.dispatched_card is not None
-        if elapsed_ms is None:
-            elapsed_fact = "время не зафиксировано"
-        else:
-            delta_ms = elapsed_ms - limit_ms
-            elapsed_seconds = round(elapsed_ms / 1000)
-            if delta_ms > 0:
-                deviation = f"+{round(delta_ms / 1000)} с сверх норматива"
-            elif delta_ms < 0:
-                deviation = f"на {round(abs(delta_ms) / 1000)} с быстрее норматива"
-            else:
-                deviation = "точно в норматив"
-            elapsed_fact = f"{elapsed_seconds} с ({deviation})"
-        passed = submitted and elapsed_ms is not None and elapsed_ms <= limit_ms
-        result.metrics.append(Metric(
-            key="card_fill_time",
-            title="Время заполнения карточки",
-            fact=elapsed_fact if submitted else f"карточка не сдана; {elapsed_fact}",
-            norm=f"сдать карточку за {round(limit_ms / 1000)} с",
-            ref="ТЗ задачи № 9; сессия вопросов и ответов 16.09.2026",
-            passed=passed,
-            weight=METRIC_WEIGHTS["card_fill_time"],
-            credit=time_credit(elapsed_ms, limit_ms) if submitted else 0.0,
-        ))
-        if not passed:
-            result.findings.append(Finding(
-                code=ErrorCode.E3,
-                source=FindingSource.TIMERS,
-                summary="Время заполнения карточки: норматив не выполнен",
-                fact=elapsed_fact if submitted else f"карточка не сдана; {elapsed_fact}",
-                norm=f"сдать карточку за {round(limit_ms / 1000)} с",
-                ref="ТЗ задачи № 9; сессия вопросов и ответов 16.09.2026",
-                competency=Competency.NORMS,
-            ))
-    elif state.exercise is Exercise.DDS:
-        # Все карточки выданы одновременно: при досрочном завершении оцениваем
-        # каждую, включая не открытую, потому что её норматив уже шёл.
-        result = GostResult()
-        cards = score_live_dds_cards(state)
-        for card in cards:
-            result.metrics.extend(card.metrics)
-            result.findings.extend(card.findings)
-    else:
-        result = evaluate(
-            scenario=scenario,
-            kio=state.kio,
-            timers=state.timers,
-            revealed_facts=[fact.id for fact in state.slots.revealed_facts()] if state.slots else None,
-            refined_facts=list(state.slots.refined) if state.slots else None,
-            end_reason=state.end_reason,
-            bounced_fields=state.bounced_fields,
-            resolved_outcome=state.resolved_outcome,
-            dispatched=state.dispatched_card is not None,
-        )
-    # Грамматика относится к свободному описанию оператора 112, а не к
-    # заполнению карточки на стороне ДДС. Учитывается только по явной настройке
-    # преподавателя и только когда есть текст для проверки.
-    operator_kio = state.operator_kio if state.handoff_to_dds else None
-    description = (operator_kio or state.kio).description or ""
-    if (state.exercise is not Exercise.DDS and state.criteria.require_correct_grammar
-            and description.strip()):
-        grammar = await assess(description)
-        result.metrics.append(Metric(
-            key="description_grammar",
-            title="Грамматика описания происшествия",
-            fact="ошибок не обнаружено" if grammar.passed else "; ".join(grammar.errors),
-            norm="грамматически корректное описание",
-            ref="критерий занятия; правила русского языка",
-            passed=grammar.passed,
-            weight=1.0,
-        ))
-        if not grammar.passed:
-            result.findings.append(Finding(
-                code=ErrorCode.E4,
-                source=FindingSource.GRAMMAR,
-                summary="Грамматическая ошибка в описании происшествия",
-                fact="; ".join(grammar.errors),
-                norm="грамматически корректное описание",
-                ref="критерий занятия; правила русского языка",
-                competency=Competency.COMMUNICATION,
-            ))
-    # Работа диспетчера — вторая роль и вторая таксономия. Отметки D1–D6 идут
-    # рядом с E1–E6, а не вместо: в живой цепочке 112 → ДДС в одном занятии
-    # участвуют оба (docs/spec/DATASET.md#статусы-реагирования).
-    live_card = state.desk.active
-    if live_card is not None and state.exercise is Exercise.CALL:
-        decision_limit_ms = live_card.timers.limits[TimerCode.DDS_ACK]
-        services = state.card_services(live_card)
-        dispatcher_findings = evaluate_dispatcher(
-            entries=live_card.status_log,
-            services=services,
-            crew_assignments=live_card.crew_assignments,
-            deadline_ms=decision_limit_ms,
-            elapsed_ms=live_card.timers.measured_ms(TimerCode.DDS_ACK),
-            reply_text=live_card.reply_text,
-            expected_decision=scenario.dds_decision.expected,
-            expected_decision_reason=scenario.dds_decision.reason,
-        )
-        result.findings.extend(dispatcher_findings)
-        result.metrics.extend(dispatcher_metrics(
-            live_card, decision_limit_ms, scenario.dds_decision.expected,
-            scenario.dds_decision.reason, services=services,
-        ))
-    # DDS cards were weighted individually in score_dds_card using each
-    # card's scenario defaults plus the lesson override. Reapplying the first
-    # scenario's weights here would corrupt the other ticket cards.
-    if state.exercise is not Exercise.DDS:
-        apply_weights(result, {**scenario.score_weights, **state.criteria.score_weights})
-
-    if state.handoff_to_dds and state.desk.scenarios:
-        # В связке КИО оценивается относительно эталона и весов упражнения
-        # 112, а каждая карточка очереди уже взвешена собственным сценарием.
-        cards = score_live_dds_cards(state)
-        for card in cards:
-            result.metrics.extend(card.metrics)
-            result.findings.extend(card.findings)
-
-    # Сводка числами: по ней считается дельта между попытками в профиле.
-    # Вытаскивать её разбором текста метрик («94 с») — путь к тихим ошибкам.
-    required = scenario.ground_truth.required_facts
-    revealed = [fact.id for fact in state.slots.revealed_facts()] if state.slots else []
-    codes: dict[str, int] = {}
-    for finding in result.findings:
-        codes[finding.code.value] = codes.get(finding.code.value, 0) + 1
-
-    state.score = {
-        "score_auto": result.score,
-        "summary": {
-            "interview_ms": state.timers.measured_ms(TimerCode.INTERVIEW),
-            "card_fill_ms": state.timers.measured_ms(TimerCode.CARD_FILL),
-            "facts_got": len([fact for fact in required if fact in revealed]),
-            "facts_required": len(required),
-            "hints": len(state.hints_shown),
-            "codes": codes,
-        },
-        "metrics": [metric.model_dump() for metric in result.metrics],
-        "findings": [finding.model_dump(mode="json") for finding in result.findings],
-        "competencies": [item.model_dump() for item in radar(result.metrics)],
-        "unavailable": result.unavailable,
-        # Статус карточки — готовая красная метка, понятная любому диспетчеру.
-        "card_status": state.station_snapshot().card.value,
-        "card_results": [
-            {"card_id": str(card.card_id), "scenario_id": card.scenario_id,
-             "score_auto": card.score_auto, "reply_text": card.reply_text,
-             "actions": card.actions, "duration_ms": card.duration_ms,
-             "title": card.title, "address": card.address,
-             "description": card.description, "incident_type": card.incident_type,
-             "victims_count": card.victims_count,
-             "received_at": card.received_at.isoformat() if card.received_at else None,
-             "managed_service": card.managed_service,
-             "recipient_services": card.recipient_services,
-             "metrics": [metric.model_dump(mode="json") for metric in card.metrics],
-             "findings": [finding.model_dump(mode="json") for finding in card.findings]}
-            for card in cards
-        ] if state.exercise is Exercise.DDS or state.handoff_to_dds else [],
-    }
+    report = await score_session(snapshot, grammar=assess)
+    state.score = report.payload(card_status=state.station_snapshot().card.value)
     # Модель только поясняет уже посчитанные провалы и балл не трогает; без
     # запущенной модели разбор выходит со статусом «недоступно», а не ждёт её.
-    state.score["ai_coaching"] = (await coach(result.metrics)).model_dump(mode="json")
+    state.score["ai_coaching"] = (await coach(report.result.metrics)).model_dump(mode="json")
     # Полный разбор хранится вместе с оценкой: PDF/CSV и история должны
     # переживать перезапуск backend, а не зависеть от живого объекта в реестре хаба.
-    state.score["full_report"] = build_report(session_id, state, scenario).model_dump(mode="json")
-    log.info("сессия %s: оценка %.1f, отметок %d", session_id, result.score, len(result.findings))
+    state.score["full_report"] = build_report(
+        session_id, state, snapshot.scenario
+    ).model_dump(mode="json")
+    log.info("сессия %s: оценка %.1f, отметок %d",
+             session_id, report.result.score, len(report.result.findings))
 
     # Оценка и аудит уходят в commit операции, завершившей занятие; ScoreReady
     # рассылает `end_session` и ждёт того же commit — без записи итог не выдаётся.
-    hub.record(session_id, ScoreCalculated(result.score, state.score))
+    hub.record(session_id, ScoreCalculated(report.result.score, state.score))
 
 
 def _ends_on_station(state) -> bool:
diff --git a/backend/app/session/score.py b/backend/app/session/score.py
new file mode 100644
index 0000000..10c637c
--- /dev/null
+++ b/backend/app/session/score.py
@@ -0,0 +1,263 @@
+"""Оценка занятия по неизменяемому снимку.
+
+`finish()` сначала доводит живое занятие до оцениваемого вида (дооценивает
+очередь ДДС), затем снимает `ScoringSnapshot` и отдаёт его `score_session`.
+Сам расчёт не читает и не меняет `state`: живой, сохранённый и перестроенный
+отчёт получают сценарий одним путём — через `scoring_scenario`.
+"""
+
+from collections.abc import Awaitable, Callable
+from dataclasses import dataclass
+from typing import Any
+
+from app.domain.events import CallEndReason, Exercise, LessonCriteria, Metric
+from app.domain.kio import KIO
+from app.domain.taxonomy import Competency, ErrorCode, Finding, FindingSource
+from app.domain.timers import TimerCode
+from app.scenarios import store
+from app.scenarios.schema import Scenario
+from app.scoring.card import evaluate_card
+from app.scoring.competency import radar
+from app.scoring.dispatcher import dispatcher_metrics, evaluate_dispatcher
+from app.scoring.gost import GostResult, evaluate
+from app.scoring.grammar import GrammarAssessment, assess
+from app.scoring.timing import CARD_FILL_TIME, time_metric
+from app.scoring.weights import apply_weights
+from app.session.dds import DdsCardRecord, DdsLiveCard
+from app.session.timers import SessionTimers
+
+GrammarCheck = Callable[[str], Awaitable[GrammarAssessment]]
+
+
+def scoring_scenario(state) -> Scenario | None:
+    """Сценарий, по которому оценивается и разбирается занятие.
+
+    После передачи 112→ДДС КИО курсанта оценивается по эталону упражнения
+    112. Балл, разбор и чек-лист самооценки обязаны брать один и тот же
+    сценарий.
+    """
+    if state.handoff_to_dds and state.operator_scenario:
+        return state.operator_scenario
+    if state.scenario is None and state.desk.scenarios:
+        return state.desk.scenarios[0]
+    return state.scenario or store.get(state.scenario_id)
+
+
+@dataclass(frozen=True)
+class ScoringSnapshot:
+    """Всё, что нужно для балла, снятое с занятия в момент завершения."""
+
+    scenario: Scenario
+    exercise: Exercise
+    handoff_to_dds: bool
+    #: КИО, которую сверяют с эталоном: в упражнении 112 — сданная карточка.
+    kio: KIO
+    #: Свободное описание оператора 112 — предмет проверки грамматики.
+    description: str
+    dispatched: bool
+    timers: SessionTimers
+    criteria: LessonCriteria
+    revealed_facts: tuple[str, ...] | None
+    refined_facts: tuple[str, ...] | None
+    end_reason: CallEndReason | None
+    bounced_fields: tuple[str, ...]
+    resolved_outcome: str | None
+    hints: int
+    #: Уже оценённые карточки очереди ДДС, в порядке выдачи.
+    dds_cards: tuple[DdsCardRecord, ...]
+    #: Карточка на пульте в упражнении по звонку: отметки D1–D6 рядом с E1–E6.
+    call_card: DdsLiveCard | None
+    call_card_services: tuple[str, ...]
+
+    @property
+    def reports_cards(self) -> bool:
+        return self.exercise is Exercise.DDS or self.handoff_to_dds
+
+    @classmethod
+    def of(cls, state) -> "ScoringSnapshot | None":
+        """Снимок живого занятия; None — оценивать не по чему.
+
+        Очередь ДДС к этому моменту должна быть дооценена
+        (`finish.score_live_dds_cards`): снимок берёт готовые записи.
+        """
+        scenario = scoring_scenario(state)
+        if scenario is None:
+            return None
+        if state.exercise is Exercise.CARD:
+            kio = state.operator_kio or state.dispatched_card or state.kio
+        else:
+            kio = state.kio
+        # Грамматика относится к свободному описанию оператора 112, а не к
+        # заполнению карточки на стороне ДДС.
+        operator_kio = state.operator_kio if state.handoff_to_dds else None
+        live_card = state.desk.active if state.exercise is Exercise.CALL else None
+        queue = state.exercise is Exercise.DDS or (state.handoff_to_dds and state.desk.scenarios)
+        return cls(
+            scenario=scenario,
+            exercise=state.exercise,
+            handoff_to_dds=state.handoff_to_dds,
+            kio=kio.model_copy(deep=True),
+            description=(operator_kio or state.kio).description or "",
+            dispatched=state.dispatched_card is not None,
+            timers=state.timers.model_copy(deep=True),
+            criteria=state.criteria.model_copy(deep=True),
+            revealed_facts=(tuple(fact.id for fact in state.slots.revealed_facts())
+                            if state.slots else None),
+            refined_facts=tuple(state.slots.refined) if state.slots else None,
+            end_reason=state.end_reason,
+            bounced_fields=tuple(state.bounced_fields),
+            resolved_outcome=state.resolved_outcome,
+            hints=len(state.hints_shown),
+            dds_cards=tuple(state.desk.completed) if queue else (),
+            call_card=live_card.model_copy(deep=True) if live_card is not None else None,
+            call_card_services=(tuple(state.card_services(live_card))
+                                if live_card is not None else ()),
+        )
+
+
+@dataclass(frozen=True)
+class ScoreReport:
+    """Посчитанная оценка: результат ГОСТ, сводка числами и карточки ДДС."""
+
+    result: GostResult
+    summary: dict[str, Any]
+    cards: tuple[DdsCardRecord, ...]
+    reports_cards: bool
+
+    def payload(self, *, card_status: str) -> dict[str, Any]:
+        """Сохраняемая оценка занятия — без разбора модели и полного отчёта."""
+        return {
+            "score_auto": self.result.score,
+            "summary": self.summary,
+            "metrics": [metric.model_dump() for metric in self.result.metrics],
+            "findings": [finding.model_dump(mode="json") for finding in self.result.findings],
+            "competencies": [item.model_dump() for item in radar(self.result.metrics)],
+            "unavailable": self.result.unavailable,
+            # Статус карточки — готовая красная метка, понятная любому диспетчеру.
+            "card_status": card_status,
+            "card_results": [
+                {"card_id": str(card.card_id), "scenario_id": card.scenario_id,
+                 "score_auto": card.score_auto, "reply_text": card.reply_text,
+                 "actions": card.actions, "duration_ms": card.duration_ms,
+                 "title": card.title, "address": card.address,
+                 "description": card.description, "incident_type": card.incident_type,
+                 "victims_count": card.victims_count,
+                 "received_at": card.received_at.isoformat() if card.received_at else None,
+                 "managed_service": card.managed_service,
+                 "recipient_services": card.recipient_services,
+                 "metrics": [metric.model_dump(mode="json") for metric in card.metrics],
+                 "findings": [finding.model_dump(mode="json") for finding in card.findings]}
+                for card in self.cards
+            ] if self.reports_cards else [],
+        }
+
+
+async def score_session(
+    snapshot: ScoringSnapshot, *, grammar: GrammarCheck = assess
+) -> ScoreReport:
+    """Балл занятия. Единственный внешний вызов — проверка грамматики, и та
+    только по явному критерию преподавателя."""
+    scenario = snapshot.scenario
+    if snapshot.exercise is Exercise.CARD:
+        result = evaluate_card(scenario, snapshot.kio)
+        metric, finding = time_metric(
+            CARD_FILL_TIME,
+            snapshot.timers.measured_ms(TimerCode.CARD_FILL),
+            snapshot.timers.limits[TimerCode.CARD_FILL],
+            completed=snapshot.dispatched,
+        )
+        result.metrics.append(metric)
+        if finding is not None:
+            result.findings.append(finding)
+    elif snapshot.exercise is Exercise.DDS:
+        # Все карточки выданы одновременно: при досрочном завершении оценена
+        # каждая, включая не открытую, потому что её норматив уже шёл.
+        result = GostResult()
+    else:
+        result = evaluate(
+            scenario=scenario,
+            kio=snapshot.kio,
+            timers=snapshot.timers,
+            revealed_facts=(list(snapshot.revealed_facts)
+                            if snapshot.revealed_facts is not None else None),
+            refined_facts=(list(snapshot.refined_facts)
+                           if snapshot.refined_facts is not None else None),
+            end_reason=snapshot.end_reason,
+            bounced_fields=list(snapshot.bounced_fields),
+            resolved_outcome=snapshot.resolved_outcome,
+            dispatched=snapshot.dispatched,
+        )
+    # Учитывается только по явной настройке преподавателя и только когда есть
+    # текст для проверки.
+    if (snapshot.exercise is not Exercise.DDS and snapshot.criteria.require_correct_grammar
+            and snapshot.description.strip()):
+        verdict = await grammar(snapshot.description)
+        result.metrics.append(Metric(
+            key="description_grammar",
+            title="Грамматика описания происшествия",
+            fact="ошибок не обнаружено" if verdict.passed else "; ".join(verdict.errors),
+            norm="грамматически корректное описание",
+            ref="критерий занятия; правила русского языка",
+            passed=verdict.passed,
+            weight=1.0,
+        ))
+        if not verdict.passed:
+            result.findings.append(Finding(
+                code=ErrorCode.E4,
+                source=FindingSource.GRAMMAR,
+                summary="Грамматическая ошибка в описании происшествия",
+                fact="; ".join(verdict.errors),
+                norm="грамматически корректное описание",
+                ref="критерий занятия; правила русского языка",
+                competency=Competency.COMMUNICATION,
+            ))
+    # Работа диспетчера — вторая роль и вторая таксономия. Отметки D1–D6 идут
+    # рядом с E1–E6, а не вместо: в живой цепочке 112 → ДДС в одном занятии
+    # участвуют оба (docs/spec/DATASET.md#статусы-реагирования).
+    live_card = snapshot.call_card
+    if live_card is not None:
+        decision_limit_ms = live_card.timers.limits[TimerCode.DDS_ACK]
+        services = list(snapshot.call_card_services)
+        result.findings.extend(evaluate_dispatcher(
+            entries=live_card.status_log,
+            services=services,
+            crew_assignments=live_card.crew_assignments,
+            deadline_ms=decision_limit_ms,
+            elapsed_ms=live_card.timers.measured_ms(TimerCode.DDS_ACK),
+            reply_text=live_card.reply_text,
+            expected_decision=scenario.dds_decision.expected,
+            expected_decision_reason=scenario.dds_decision.reason,
+        ))
+        result.metrics.extend(dispatcher_metrics(
+            live_card, decision_limit_ms, scenario.dds_decision.expected,
+            scenario.dds_decision.reason, services=services,
+        ))
+    # Карточки ДДС уже взвешены каждая своим сценарием плюс настройкой
+    # занятия. Веса первого сценария поверх них испортили бы остальные.
+    if snapshot.exercise is not Exercise.DDS:
+        apply_weights(result, {**scenario.score_weights, **snapshot.criteria.score_weights})
+    # В связке КИО оценивается относительно эталона и весов упражнения 112,
+    # а каждая карточка очереди уже взвешена собственным сценарием.
+    for card in snapshot.dds_cards:
+        result.metrics.extend(card.metrics)
+        result.findings.extend(card.findings)
+
+    # Сводка числами: по ней считается дельта между попытками в профиле.
+    # Вытаскивать её разбором текста метрик («94 с») — путь к тихим ошибкам.
+    required = scenario.ground_truth.required_facts
+    revealed = snapshot.revealed_facts or ()
+    codes: dict[str, int] = {}
+    for finding in result.findings:
+        codes[finding.code.value] = codes.get(finding.code.value, 0) + 1
+    summary = {
+        "interview_ms": snapshot.timers.measured_ms(TimerCode.INTERVIEW),
+        "card_fill_ms": snapshot.timers.measured_ms(TimerCode.CARD_FILL),
+        "facts_got": len([fact for fact in required if fact in revealed]),
+        "facts_required": len(required),
+        "hints": snapshot.hints,
+        "codes": codes,
+    }
+    return ScoreReport(
+        result=result, summary=summary, cards=snapshot.dds_cards,
+        reports_cards=snapshot.reports_cards,
+    )
diff --git a/backend/tests/test_dispatcher_scoring.py b/backend/tests/test_dispatcher_scoring.py
index ee8c0e6..8bc5c43 100644
--- a/backend/tests/test_dispatcher_scoring.py
+++ b/backend/tests/test_dispatcher_scoring.py
@@ -1,12 +1,28 @@
 from datetime import datetime, timezone
-from types import SimpleNamespace
+from pathlib import Path
 
 import pytest
 from pydantic import ValidationError
 
 from app.domain.statuses import ServiceStatus, StatusEntry
 from app.domain.taxonomy import ErrorCode
+from app.scenarios.loader import load_file
 from app.scoring.dispatcher import dispatcher_metrics, evaluate_dispatcher
+from app.session.dds import DdsLiveCard, build_card
+from app.session.timers import SessionTimers
+
+LIBRARY = Path(__file__).resolve().parents[2] / "scenarios"
+SERVICES = ["Служба 101"]
+
+
+def live_card(*, status_log, crew_assignments, dispatched_at) -> DdsLiveCard:
+    """Карточка пульта с заданным журналом статусов — вход оценки ДДС."""
+    scenario = load_file(LIBRARY / "fire-apartment-l2.yaml", LIBRARY)
+    card = build_card(scenario, 0, SessionTimers().limits)
+    card.status_log = status_log
+    card.crew_assignments = crew_assignments
+    card.dispatched_at = dispatched_at
+    return card
 
 
 def test_late_primary_status_has_d1_finding_even_when_status_exists():
@@ -110,8 +126,7 @@ def test_missing_manual_status_comment_has_a_d5_finding():
 
 def test_each_manual_status_comment_is_part_of_the_numeric_reply_metric():
     at = datetime.now(timezone.utc)
-    state = SimpleNamespace(
-        managed_services=lambda: ["Служба 101"],
+    card = live_card(
         status_log=[
             StatusEntry(
                 service="Служба 101", status=ServiceStatus.ACCEPTED,
@@ -127,7 +142,7 @@ def test_each_manual_status_comment_is_part_of_the_numeric_reply_metric():
     )
 
     reply = next(
-        metric for metric in dispatcher_metrics(state, 30_000)
+        metric for metric in dispatcher_metrics(card, 30_000, services=SERVICES)
         if metric.key == "dds_reply"
     )
 
@@ -135,9 +150,9 @@ def test_each_manual_status_comment_is_part_of_the_numeric_reply_metric():
     assert "к каждой ручной отметке" in reply.norm
 
     findings = evaluate_dispatcher(
-        entries=state.status_log,
+        entries=card.status_log,
         services=["Служба 101"],
-        crew_assignments=state.crew_assignments,
+        crew_assignments=card.crew_assignments,
         deadline_ms=30_000,
         elapsed_ms=0,
     )
@@ -173,13 +188,13 @@ def test_scenario_may_define_a_valid_decline_for_duplicate_or_territory():
         expected_decision_reason="дублирующая карточка",
     )
     assert ErrorCode.D3 not in [finding.code for finding in findings]
-    state = SimpleNamespace(
-        managed_services=lambda: ["Служба 101"], status_log=entries,
+    card = live_card(
+        status_log=entries,
         crew_assignments={}, dispatched_at=at,
     )
     metrics = dispatcher_metrics(
-        state, 30_000, expected_decision="decline",
-        expected_decision_reason="дублирующая карточка",
+        card, 30_000, expected_decision="decline",
+        expected_decision_reason="дублирующая карточка", services=SERVICES,
     )
     decision = next(metric for metric in metrics if metric.key == "dds_decision")
     assert decision.passed
@@ -188,8 +203,7 @@ def test_scenario_may_define_a_valid_decline_for_duplicate_or_territory():
 
 def test_nonempty_unstructured_comment_fails_reply_metric_but_structured_passes():
     at = datetime.now(timezone.utc)
-    state = SimpleNamespace(
-        managed_services=lambda: ["Служба 101"],
+    card = live_card(
         status_log=[StatusEntry(
             service="Служба 101", status=ServiceStatus.ACCEPTED,
             at=at, comment="бригада на связи",
@@ -197,19 +211,19 @@ def test_nonempty_unstructured_comment_fails_reply_metric_but_structured_passes(
         crew_assignments={"Служба 101": "Бригада 12"},
         dispatched_at=at,
     )
-    reply = next(m for m in dispatcher_metrics(state, 30_000) if m.key == "dds_reply")
+    reply = next(m for m in dispatcher_metrics(card, 30_000, services=SERVICES) if m.key == "dds_reply")
     assert not reply.passed
     findings = evaluate_dispatcher(
-        entries=state.status_log, services=["Служба 101"],
-        crew_assignments=state.crew_assignments,
+        entries=card.status_log, services=["Служба 101"],
+        crew_assignments=card.crew_assignments,
         deadline_ms=30_000, elapsed_ms=0,
     )
     assert any("не разделяют основание и сведения" in f.summary for f in findings)
 
-    state.status_log[0] = state.status_log[0].model_copy(update={
+    card.status_log[0] = card.status_log[0].model_copy(update={
         "comment": "Основание: доклад старшего.\nСведения: бригада на связи.",
     })
-    reply = next(m for m in dispatcher_metrics(state, 30_000) if m.key == "dds_reply")
+    reply = next(m for m in dispatcher_metrics(card, 30_000, services=SERVICES) if m.key == "dds_reply")
     assert reply.passed
 
 def test_accepting_card_with_scenario_expected_decline_is_explained():
@@ -242,11 +256,11 @@ def test_incomplete_work_path_has_d6_for_failed_progress_metrics():
         StatusEntry(service="Служба 101", status=ServiceStatus.ACCEPTED, at=at),
         StatusEntry(service="Служба 101", status=ServiceStatus.RESPONDING, at=at),
     ]
-    state = SimpleNamespace(
-        managed_services=lambda: ["Служба 101"], status_log=entries,
+    card = live_card(
+        status_log=entries,
         crew_assignments={"Служба 101": "Бригада 1"}, dispatched_at=at,
     )
-    metrics = dispatcher_metrics(state, 30_000)
+    metrics = dispatcher_metrics(card, 30_000, services=SERVICES)
     assert not next(item for item in metrics if item.key == "dds_progress").passed
     assert not next(item for item in metrics if item.key == "dds_completion").passed
     findings = evaluate_dispatcher(
@@ -267,11 +281,11 @@ def test_reasoned_refusal_after_acceptance_is_a_valid_terminal_path():
             comment="Бригаде переданы сведения, выезд не выполнялся по причине угрозы.",
         ),
     ]
-    state = SimpleNamespace(
-        managed_services=lambda: ["Служба 101"], status_log=entries,
+    card = live_card(
+        status_log=entries,
         crew_assignments={"Служба 101": "Бригада 1"}, dispatched_at=at,
     )
-    metrics = dispatcher_metrics(state, 30_000)
+    metrics = dispatcher_metrics(card, 30_000, services=SERVICES)
     assert next(item for item in metrics if item.key == "dds_progress").passed
     assert next(item for item in metrics if item.key == "dds_completion").passed
     findings = evaluate_dispatcher(
diff --git a/backend/tests/test_score_session.py b/backend/tests/test_score_session.py
new file mode 100644
index 0000000..cb20fa6
--- /dev/null
+++ b/backend/tests/test_score_session.py
@@ -0,0 +1,179 @@
+"""Оценка занятия по снимку: без websocket, без живого `state` внутри расчёта."""
+
+import asyncio
+from dataclasses import FrozenInstanceError
+from pathlib import Path
+from uuid import uuid4
+
+import pytest
+
+from app.domain.events import Exercise, LessonCriteria, SessionMode
+from app.domain.kio import KIO
+from app.domain.statuses import ServiceStatus
+from app.domain.taxonomy import ErrorCode, FindingSource
+from app.scenarios.loader import load_file
+from app.scoring.grammar import GrammarAssessment
+from app.session import finish as finish_module
+from app.session.dds import prepare_handoff_queue, prepare_queue
+from app.session.hub import hub
+from app.session.score import ScoringSnapshot, score_session
+from app.session.state import SessionState
+from app.session.store import MemorySessionStore
+
+LIBRARY = Path(__file__).resolve().parents[2] / "scenarios"
+
+
+def scenario(name: str):
+    return load_file(LIBRARY / name, LIBRARY)
+
+
+def card_state(*, grammar: bool = True, handoff: bool = False) -> SessionState:
+    operator = scenario("fire-apartment-l2.yaml")
+    state = SessionState(
+        session_id=uuid4(), scenario_id=operator.id, scenario_title=operator.title,
+        level=operator.level.value, mode=SessionMode.TRAINING, exercise=Exercise.CARD,
+        handoff_to_dds=handoff, scenario=operator,
+        criteria=LessonCriteria(require_correct_grammar=grammar),
+    )
+    state.kio = KIO(
+        address="улица Ленина, 14", incident_type="fire", victims_count=2,
+        description="горит балкон", notify=["Служба 101"],
+    )
+    state.on_event("card.start")
+    state.dispatch()
+    state.on_event("card.submit")
+    if handoff:
+        prepare_handoff_queue(state, [scenario("tickets/t01-1-fire-container.yaml")])
+    return state
+
+
+def dds_state() -> SessionState:
+    first = scenario("fire-apartment-l2.yaml")
+    state = SessionState(
+        session_id=uuid4(), scenario_id=first.id, scenario_title=first.title,
+        level=first.level.value, mode=SessionMode.TRAINING, exercise=Exercise.DDS,
+        criteria=LessonCriteria(require_correct_grammar=True),
+    )
+    prepare_queue(state, [first, scenario("tickets/t20-2-stroke.yaml")])
+    return state
+
+
+def grammar_says(passed: bool, calls: list[str]):
+    async def check(text: str) -> GrammarAssessment:
+        calls.append(text)
+        return GrammarAssessment(
+            passed=passed, errors=() if passed else ("нет завершающего знака препинания",),
+            source="test",
+        )
+    return check
+
+
+def score(snapshot, grammar):
+    return asyncio.run(score_session(snapshot, grammar=grammar))
+
+
+@pytest.fixture(autouse=True)
+def offline_finish(monkeypatch):
+    class NoCoaching:
+        def model_dump(self, **_kwargs):
+            return {}
+
+    async def no_coach(_metrics):
+        return NoCoaching()
+
+    monkeypatch.setattr(finish_module, "coach", no_coach)
+    monkeypatch.setattr(hub, "store", MemorySessionStore())
+
+
+def test_passed_grammar_check_adds_passed_metric_without_e4():
+    calls: list[str] = []
+    snapshot = ScoringSnapshot.of(card_state())
+
+    report = score(snapshot, grammar_says(True, calls))
+
+    assert calls == ["горит балкон"]
+    metric = next(item for item in report.result.metrics if item.key == "description_grammar")
+    assert metric.passed and metric.fact == "ошибок не обнаружено"
+    assert ErrorCode.E4 not in [item.code for item in report.result.findings]
+
+
+def test_failed_grammar_check_adds_e4_and_lowers_score():
+    passed = score(ScoringSnapshot.of(card_state()), grammar_says(True, []))
+    failed = score(ScoringSnapshot.of(card_state()), grammar_says(False, []))
+
+    metric = next(item for item in failed.result.metrics if item.key == "description_grammar")
+    assert not metric.passed
+    assert metric.fact == "нет завершающего знака препинания"
+    e4 = next(item for item in failed.result.findings if item.code is ErrorCode.E4)
+    assert e4.source is FindingSource.GRAMMAR
+    assert failed.result.score < passed.result.score
+
+
+def test_grammar_is_not_checked_without_criterion_or_on_dds_exercise():
+    calls: list[str] = []
+
+    off = score(ScoringSnapshot.of(card_state(grammar=False)), grammar_says(False, calls))
+    dds = score(ScoringSnapshot.of(dds_state()), grammar_says(False, calls))
+
+    assert calls == []
+    assert "description_grammar" not in [item.key for item in off.result.metrics]
+    assert "description_grammar" not in [item.key for item in dds.result.metrics]
+
+
+def test_snapshot_is_read_only():
+    snapshot = ScoringSnapshot.of(card_state())
+
+    with pytest.raises(FrozenInstanceError):
+        snapshot.scenario = None
+
+
+def test_card_fill_time_is_scored_from_snapshot_timers():
+    report = score(ScoringSnapshot.of(card_state(grammar=False)), grammar_says(True, []))
+
+    metric = next(item for item in report.result.metrics if item.key == "card_fill_time")
+    assert metric.passed
+    assert metric.fact == "0 с (на 180 с быстрее норматива)"
+    assert report.summary["card_fill_ms"] is not None
+
+
+def test_dds_snapshot_scores_every_queue_card_and_leaves_state_untouched():
+    state = dds_state()
+    finish_module.score_live_dds_cards(state)
+    completed = list(state.desk.completed)
+    snapshot = ScoringSnapshot.of(state)
+
+    report = score(snapshot, grammar_says(True, []))
+
+    assert [card.scenario_id for card in report.cards] == ["fire-apartment-l2", "t20-2-stroke"]
+    assert [item.title for item in report.result.metrics] == [
+        item.title for card in completed for item in card.metrics
+    ]
+    assert state.desk.completed == completed
+
+
+def test_handoff_live_and_refreshed_reports_use_operator_scenario_and_same_score():
+    state = card_state(handoff=True)
+    active = state.desk.ordered()[1]
+    state.desk.open(active.card_id)
+    active.set_service_status(
+        active.dispatched_card.notify[0], ServiceStatus.ACCEPTED,
+        "Основание: доклад.\nСведения: принято.",
+    )
+    # Предусловие ошибки: к завершению активна не карточка курсанта.
+    assert state.desk.active.scenario.id == "t01-1-fire-container"
+    assert ScoringSnapshot.of(state).scenario.id == "fire-apartment-l2"
+
+    async def live_then_refreshed():
+        async with hub.operation(state.session_id):
+            await finish_module.finish(state.session_id, state)
+        live = dict(state.score["full_report"])
+        state.self_assessed = True
+        async with hub.operation(state.session_id):
+            await finish_module.refresh_archived_report(state.session_id, state)
+        return live, state.score["full_report"]
+
+    live, refreshed = asyncio.run(live_then_refreshed())
+
+    assert live["scenario_id"] == refreshed["scenario_id"] == "fire-apartment-l2"
+    assert live["score_auto"] == refreshed["score_auto"] == state.score["score_auto"]
+    assert live["metrics"] == refreshed["metrics"]