Add coding mission tables and models for programming challenges

- Introduced `coding_challenges` and `coding_attempts` tables in the database schema.
- Created corresponding SQLAlchemy models for `CodingChallenge` and `CodingAttempt`.
- Implemented service functions for evaluating coding challenges and managing user attempts.
- Added Pydantic schemas for API interactions related to coding missions.
- Updated frontend components to support coding challenges, including a new `CodingMissionPanel` for user interaction.
- Enhanced mission list and detail views to display coding challenge progress.

backend/alembic/versions/20241005_0007_coding_missions.py

@@ -0,0 +1,68 @@
+"""Добавляем таблицы для кодовых миссий."""
+
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "20241005_0007"
+down_revision = "20240927_0006"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    """Создаём таблицы испытаний и попыток запуска кода."""
+
+    op.create_table(
+        "coding_challenges",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column("mission_id", sa.Integer(), sa.ForeignKey("missions.id"), nullable=False),
+        sa.Column("order", sa.Integer(), nullable=False),
+        sa.Column("title", sa.String(length=160), nullable=False),
+        sa.Column("prompt", sa.Text(), nullable=False),
+        sa.Column("starter_code", sa.Text(), nullable=True),
+        sa.Column("expected_output", sa.Text(), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.UniqueConstraint("mission_id", "order", name="uq_coding_challenge_order"),
+    )
+
+    op.create_table(
+        "coding_attempts",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column("challenge_id", sa.Integer(), sa.ForeignKey("coding_challenges.id"), nullable=False),
+        sa.Column("user_id", sa.Integer(), sa.ForeignKey("users.id"), nullable=False),
+        sa.Column("code", sa.Text(), nullable=False),
+        sa.Column("stdout", sa.Text(), nullable=False, server_default=""),
+        sa.Column("stderr", sa.Text(), nullable=False, server_default=""),
+        sa.Column("exit_code", sa.Integer(), nullable=False, server_default="0"),
+        sa.Column("is_passed", sa.Boolean(), nullable=False, server_default=sa.sql.expression.false()),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+    )
+
+    op.create_index(
+        "ix_coding_challenges_mission_id",
+        "coding_challenges",
+        ["mission_id"],
+        unique=False,
+    )
+    op.create_index(
+        "ix_coding_attempts_user_id",
+        "coding_attempts",
+        ["user_id"],
+        unique=False,
+    )
+
+
+def downgrade() -> None:
+    """Удаляем вспомогательные таблицы."""
+
+    op.drop_index("ix_coding_attempts_user_id", table_name="coding_attempts")
+    op.drop_index("ix_coding_challenges_mission_id", table_name="coding_challenges")
+    op.drop_table("coding_attempts")
+    op.drop_table("coding_challenges")
+

backend/app/api/routes/missions.py

@@ -9,6 +9,7 @@ from sqlalchemy.orm import Session, selectinload
 
 from app.api.deps import get_current_user
 from app.db.session import get_db
+from app.models.coding import CodingAttempt, CodingChallenge
 from app.models.branch import Branch, BranchMission
 from app.models.mission import Mission, MissionSubmission, SubmissionStatus
 from app.models.user import User, UserRole
@@ -19,6 +20,13 @@ from app.schemas.mission import (
     MissionDetail,
     MissionSubmissionRead,
 )
+from app.schemas.coding import (
+    CodingChallengeState,
+    CodingMissionState,
+    CodingRunRequest,
+    CodingRunResponse,
+)
+from app.services.coding import count_completed_challenges, evaluate_challenge
 from app.services.mission import UNSET, submit_mission
 from app.services.storage import delete_submission_document, save_submission_document
 from app.core.config import settings
@@ -88,6 +96,91 @@ def _mission_availability(
     return is_available, reasons
 
 
+def _ensure_mission_access(
+    *,
+    mission: Mission,
+    user: User,
+    db: Session,
+) -> tuple[bool, set[int]]:
+    """Проверяем, что миссия активна и доступна пилоту."""
+
+    db.refresh(user)
+    _ = user.submissions
+
+    branches = (
+        db.query(Branch)
+        .options(selectinload(Branch.missions))
+        .all()
+    )
+    branch_dependencies = _build_branch_dependencies(branches)
+    completed_missions = _load_user_progress(user)
+    mission_titles = dict(db.query(Mission.id, Mission.title).all())
+
+    is_available, reasons = _mission_availability(
+        mission=mission,
+        user=user,
+        completed_missions=completed_missions,
+        branch_dependencies=branch_dependencies,
+        mission_titles=mission_titles,
+    )
+
+    if mission.id not in completed_missions and not is_available:
+        message = reasons[0] if reasons else "Миссия пока недоступна."
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=message)
+
+    return mission.id in completed_missions, completed_missions
+
+
+def _build_challenge_state(
+    *,
+    challenges: list[CodingChallenge],
+    attempts: list[CodingAttempt],
+) -> tuple[list[CodingChallengeState], int, int, int | None]:
+    """Формируем состояние каждого задания."""
+
+    latest_attempts: dict[int, CodingAttempt] = {}
+    completed_ids: set[int] = set()
+
+    for attempt in sorted(attempts, key=lambda item: item.created_at, reverse=True):
+        if attempt.challenge_id not in latest_attempts:
+            latest_attempts[attempt.challenge_id] = attempt
+        if attempt.is_passed:
+            completed_ids.add(attempt.challenge_id)
+
+    completed_count = len(completed_ids)
+    total = len(challenges)
+
+    states: list[CodingChallengeState] = []
+    current_id: int | None = None
+
+    for challenge in challenges:
+        last_attempt = latest_attempts.get(challenge.id)
+        is_passed = challenge.id in completed_ids
+        is_unlocked = is_passed
+
+        if not is_passed and current_id is None:
+            current_id = challenge.id
+            is_unlocked = True
+
+        states.append(
+            CodingChallengeState(
+                id=challenge.id,
+                order=challenge.order,
+                title=challenge.title,
+                prompt=challenge.prompt,
+                starter_code=challenge.starter_code,
+                is_passed=is_passed,
+                is_unlocked=is_unlocked,
+                last_submitted_code=last_attempt.code if last_attempt else None,
+                last_stdout=last_attempt.stdout if last_attempt else None,
+                last_stderr=last_attempt.stderr if last_attempt else None,
+                last_exit_code=last_attempt.exit_code if last_attempt else None,
+                updated_at=last_attempt.updated_at if last_attempt else None,
+            )
+        )
+
+    return states, total, completed_count, current_id
+
 @router.get("/branches", response_model=list[BranchRead], summary="Список веток миссий")
 def list_branches(
     *, db: Session = Depends(get_db), current_user: User = Depends(get_current_user)
@@ -180,6 +273,7 @@ def list_missions(
         .options(
             selectinload(Mission.prerequisites),
             selectinload(Mission.minimum_rank),
+            selectinload(Mission.coding_challenges),
         )
         .filter(Mission.is_active.is_(True))
         .order_by(Mission.id)
@@ -188,6 +282,11 @@ def list_missions(
 
     mission_titles = {mission.id: mission.title for mission in missions}
     completed_missions = _load_user_progress(current_user)
+    coding_progress = count_completed_challenges(
+        db,
+        mission_ids=[mission.id for mission in missions if mission.coding_challenges],
+        user=current_user,
+    )
 
     response: list[MissionBase] = []
     for mission in missions:
@@ -239,7 +338,12 @@ def get_mission(
 ) -> MissionDetail:
     """Возвращаем подробную информацию о миссии."""
 
-    mission = db.query(Mission).filter(Mission.id == mission_id, Mission.is_active.is_(True)).first()
+    mission = (
+        db.query(Mission)
+        .options(selectinload(Mission.coding_challenges))
+        .filter(Mission.id == mission_id, Mission.is_active.is_(True))
+        .first()
+    )
     if not mission:
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Миссия не найдена")
 
@@ -253,6 +357,7 @@ def get_mission(
     branch_dependencies = _build_branch_dependencies(branches)
     completed_missions = _load_user_progress(current_user)
     mission_titles = dict(db.query(Mission.id, Mission.title).all())
+    coding_progress = count_completed_challenges(db, mission_ids=[mission.id], user=current_user)
 
     is_available, reasons = _mission_availability(
         mission=mission,
@@ -319,6 +424,124 @@ def get_mission(
     return data
 
 
+@router.get(
+    "/{mission_id}/coding/challenges",
+    response_model=CodingMissionState,
+    summary="Получаем список заданий по Python",
+)
+def get_coding_challenges(
+    mission_id: int,
+    *,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_user),
+) -> CodingMissionState:
+    """Возвращаем состояние миссии с программированием."""
+
+    mission = (
+        db.query(Mission)
+        .options(selectinload(Mission.coding_challenges))
+        .filter(Mission.id == mission_id, Mission.is_active.is_(True))
+        .first()
+    )
+    if not mission:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Миссия не найдена")
+
+    if not mission.coding_challenges:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Для миссии не настроены задания на программирование.",
+        )
+
+    mission_completed, completed_missions = _ensure_mission_access(
+        mission=mission,
+        user=current_user,
+        db=db,
+    )
+
+    challenge_ids = [challenge.id for challenge in mission.coding_challenges]
+    attempts: list[CodingAttempt] = []
+    if challenge_ids:
+        attempts = (
+            db.query(CodingAttempt)
+            .filter(
+                CodingAttempt.user_id == current_user.id,
+                CodingAttempt.challenge_id.in_(challenge_ids),
+            )
+            .order_by(CodingAttempt.created_at.desc())
+            .all()
+        )
+
+    states, total, completed_count, current_id = _build_challenge_state(
+        challenges=sorted(mission.coding_challenges, key=lambda item: item.order),
+        attempts=attempts,
+    )
+
+    if mission.id in completed_missions:
+        mission_completed = True
+
+    return CodingMissionState(
+        mission_id=mission.id,
+        total_challenges=total,
+        completed_challenges=completed_count,
+        current_challenge_id=current_id,
+        is_mission_completed=mission_completed,
+        challenges=states,
+    )
+
+
+@router.post(
+    "/{mission_id}/coding/challenges/{challenge_id}/run",
+    response_model=CodingRunResponse,
+    summary="Проверяем решение задания",
+)
+def run_coding_challenge(
+    mission_id: int,
+    challenge_id: int,
+    payload: CodingRunRequest,
+    *,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_user),
+) -> CodingRunResponse:
+    """Запускаем Python-код кандидата и возвращаем результат."""
+
+    mission = (
+        db.query(Mission)
+        .options(selectinload(Mission.coding_challenges))
+        .filter(Mission.id == mission_id, Mission.is_active.is_(True))
+        .first()
+    )
+    if not mission:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Миссия не найдена")
+
+    mission_completed, _ = _ensure_mission_access(mission=mission, user=current_user, db=db)
+
+    challenge = next((item for item in mission.coding_challenges if item.id == challenge_id), None)
+    if not challenge:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Задание не найдено")
+
+    evaluation = evaluate_challenge(
+        db,
+        challenge=challenge,
+        user=current_user,
+        code=payload.code,
+    )
+
+    mission_completed = mission_completed or evaluation.mission_completed
+    expected_output = None
+    if not evaluation.attempt.is_passed:
+        expected_output = challenge.expected_output
+
+    return CodingRunResponse(
+        attempt_id=evaluation.attempt.id,
+        stdout=evaluation.attempt.stdout,
+        stderr=evaluation.attempt.stderr,
+        exit_code=evaluation.attempt.exit_code,
+        is_passed=evaluation.attempt.is_passed,
+        mission_completed=mission_completed,
+        expected_output=expected_output,
+    )
+
+
 @router.post("/{mission_id}/submit", response_model=MissionSubmissionRead, summary="Отправляем отчёт")
 async def submit(
     mission_id: int,

backend/app/models/__init__.py

@@ -4,6 +4,7 @@ from .artifact import Artifact  # noqa: F401
 from .branch import Branch, BranchMission  # noqa: F401
 from .journal import JournalEntry  # noqa: F401
 from .mission import Mission, MissionCompetencyReward, MissionPrerequisite, MissionSubmission  # noqa: F401
+from .coding import CodingAttempt, CodingChallenge  # noqa: F401
 from .onboarding import OnboardingSlide, OnboardingState  # noqa: F401
 from .python import PythonChallenge, PythonSubmission, PythonUserProgress  # noqa: F401
 from .rank import Rank, RankCompetencyRequirement, RankMissionRequirement  # noqa: F401
@@ -15,6 +16,8 @@ __all__ = [
     "Branch",
     "BranchMission",
     "JournalEntry",
+    "CodingChallenge",
+    "CodingAttempt",
     "Mission",
     "MissionCompetencyReward",
     "MissionPrerequisite",

backend/app/models/coding.py

@@ -0,0 +1,52 @@
+"""Модели для кодовых испытаний внутри миссий."""
+
+from __future__ import annotations
+
+from typing import List, Optional
+
+from sqlalchemy import Boolean, ForeignKey, Integer, String, Text, UniqueConstraint
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.models.base import Base, TimestampMixin
+
+
+class CodingChallenge(Base, TimestampMixin):
+    """Шаг миссии с заданием на программирование."""
+
+    __tablename__ = "coding_challenges"
+    __table_args__ = (
+        # Порядок внутри миссии должен быть уникальным, чтобы упрощать проверку последовательности.
+        UniqueConstraint("mission_id", "order", name="uq_coding_challenge_order"),
+    )
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    mission_id: Mapped[int] = mapped_column(ForeignKey("missions.id"), nullable=False, index=True)
+    order: Mapped[int] = mapped_column(Integer, nullable=False)
+    title: Mapped[str] = mapped_column(String(160), nullable=False)
+    prompt: Mapped[str] = mapped_column(Text, nullable=False)
+    starter_code: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
+    expected_output: Mapped[str] = mapped_column(Text, nullable=False)
+
+    mission = relationship("Mission", back_populates="coding_challenges")
+    attempts: Mapped[List["CodingAttempt"]] = relationship(
+        "CodingAttempt", back_populates="challenge", cascade="all, delete-orphan"
+    )
+
+
+class CodingAttempt(Base, TimestampMixin):
+    """История запусков кода пилота для конкретного задания."""
+
+    __tablename__ = "coding_attempts"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    challenge_id: Mapped[int] = mapped_column(ForeignKey("coding_challenges.id"), nullable=False)
+    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"), nullable=False, index=True)
+    code: Mapped[str] = mapped_column(Text, nullable=False)
+    stdout: Mapped[str] = mapped_column(Text, nullable=False, default="")
+    stderr: Mapped[str] = mapped_column(Text, nullable=False, default="")
+    exit_code: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
+    is_passed: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
+
+    challenge = relationship("CodingChallenge", back_populates="attempts")
+    user = relationship("User", back_populates="coding_attempts")
+

backend/app/models/mission.py

@@ -3,13 +3,16 @@
 from __future__ import annotations
 
 from enum import Enum
-from typing import List, Optional
+from typing import TYPE_CHECKING, List, Optional
 
 from sqlalchemy import Boolean, Enum as SQLEnum, ForeignKey, Integer, String, Text, UniqueConstraint
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from app.models.base import Base, TimestampMixin
 
+if TYPE_CHECKING:
+    from app.models.coding import CodingChallenge
+
 
 class MissionDifficulty(str, Enum):
     """Условные уровни сложности."""
@@ -56,6 +59,12 @@ class Mission(Base, TimestampMixin):
     rank_requirements: Mapped[List["RankMissionRequirement"]] = relationship(
         "RankMissionRequirement", back_populates="mission"
     )
+    coding_challenges: Mapped[List["CodingChallenge"]] = relationship(
+        "CodingChallenge",
+        back_populates="mission",
+        cascade="all, delete-orphan",
+        order_by="CodingChallenge.order",
+    )
 
 
 class MissionCompetencyReward(Base, TimestampMixin):

backend/app/models/user.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 
 from datetime import datetime
 from enum import Enum
-from typing import List, Optional
+from typing import TYPE_CHECKING, List, Optional
 
 from sqlalchemy import Boolean, DateTime, Enum as SQLEnum, ForeignKey, Integer, String, Text, UniqueConstraint
 from sqlalchemy.orm import Mapped, mapped_column, relationship
@@ -14,6 +14,9 @@ from app.models.base import Base, TimestampMixin
 # Локальные импорты внизу файла, чтобы избежать циклов типов
 
 
+if TYPE_CHECKING:
+    from app.models.coding import CodingAttempt
+
 class UserRole(str, Enum):
     """Типы ролей в системе."""
 
@@ -61,6 +64,9 @@ class User(Base, TimestampMixin):
     onboarding_state: Mapped[Optional["OnboardingState"]] = relationship(
         "OnboardingState", back_populates="user", cascade="all, delete-orphan", uselist=False
     )
+    coding_attempts: Mapped[List["CodingAttempt"]] = relationship(
+        "CodingAttempt", back_populates="user", cascade="all, delete-orphan"
+    )
 
 
 class CompetencyCategory(str, Enum):

backend/app/schemas/coding.py

@@ -0,0 +1,55 @@
+"""Схемы для миссий с задачами на программирование."""
+
+from __future__ import annotations
+
+from datetime import datetime
+from typing import Optional
+
+from pydantic import BaseModel, Field
+
+
+class CodingChallengeState(BaseModel):
+    """Описание шага миссии для фронтенда."""
+
+    id: int
+    order: int
+    title: str
+    prompt: str
+    starter_code: Optional[str] = None
+    is_passed: bool = False
+    is_unlocked: bool = False
+    last_submitted_code: Optional[str] = None
+    last_stdout: Optional[str] = None
+    last_stderr: Optional[str] = None
+    last_exit_code: Optional[int] = None
+    updated_at: Optional[datetime] = None
+
+
+class CodingMissionState(BaseModel):
+    """Состояние всей миссии: прогресс и список задач."""
+
+    mission_id: int
+    total_challenges: int
+    completed_challenges: int
+    current_challenge_id: Optional[int]
+    is_mission_completed: bool
+    challenges: list[CodingChallengeState]
+
+
+class CodingRunRequest(BaseModel):
+    """Запрос на запуск решения."""
+
+    code: str = Field(..., min_length=1, description="Исходный код на Python")
+
+
+class CodingRunResponse(BaseModel):
+    """Ответ после запуска кода пользователя."""
+
+    attempt_id: int
+    stdout: str
+    stderr: str
+    exit_code: int
+    is_passed: bool
+    mission_completed: bool
+    expected_output: Optional[str] = None
+

backend/app/services/coding.py

@@ -0,0 +1,202 @@
+"""Сервисные функции для миссии с заданиями на программирование."""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Iterable
+
+from fastapi import HTTPException, status
+from sqlalchemy import and_, func, select
+from sqlalchemy.orm import Session
+
+from app.models.coding import CodingAttempt, CodingChallenge
+from app.models.mission import Mission, MissionSubmission, SubmissionStatus
+from app.models.user import User
+from app.services.mission import approve_submission
+from app.utils.python_runner import PythonRunResult, run_user_python_code
+
+
+@dataclass(slots=True)
+class AttemptEvaluation:
+    """Результат проверки решения."""
+
+    attempt: CodingAttempt
+    mission_completed: bool
+
+
+def _normalize_output(raw: str) -> str:
+    """Удаляем завершающие перевод строки и приводим переносы к ``\n``."""
+
+    return raw.replace("\r\n", "\n").rstrip("\n")
+
+
+def _ensure_previous_challenges_solved(
+    db: Session,
+    *,
+    challenge: CodingChallenge,
+    user: User,
+) -> None:
+    """Проверяем, что все предыдущие задания завершены."""
+
+    previous_ids = (
+        db.execute(
+            select(CodingChallenge.id)
+            .where(
+                CodingChallenge.mission_id == challenge.mission_id,
+                CodingChallenge.order < challenge.order,
+            )
+            .order_by(CodingChallenge.order)
+        )
+        .scalars()
+        .all()
+    )
+
+    if not previous_ids:
+        return
+
+    solved_ids = set(
+        db.execute(
+            select(CodingAttempt.challenge_id)
+            .where(
+                CodingAttempt.user_id == user.id,
+                CodingAttempt.challenge_id.in_(previous_ids),
+                CodingAttempt.is_passed.is_(True),
+            )
+            .distinct()
+        )
+        .scalars()
+        .all()
+    )
+
+    missing = [challenge_id for challenge_id in previous_ids if challenge_id not in solved_ids]
+    if missing:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Сначала решите предыдущие задачи этой миссии.",
+        )
+
+
+def _finalize_mission_if_needed(
+    db: Session,
+    *,
+    mission: Mission,
+    user: User,
+    challenge_ids: Iterable[int],
+) -> bool:
+    """Если пилот решил все задания, автоматически засчитываем миссию."""
+
+    challenge_ids = list(challenge_ids)
+    if not challenge_ids:
+        return False
+
+    solved_ids = set(
+        db.execute(
+            select(CodingAttempt.challenge_id)
+            .where(
+                CodingAttempt.user_id == user.id,
+                CodingAttempt.challenge_id.in_(challenge_ids),
+                CodingAttempt.is_passed.is_(True),
+            )
+            .distinct()
+        )
+        .scalars()
+        .all()
+    )
+
+    if len(solved_ids) != len(set(challenge_ids)):
+        return False
+
+    submission = (
+        db.query(MissionSubmission)
+        .filter(
+            MissionSubmission.user_id == user.id,
+            MissionSubmission.mission_id == mission.id,
+        )
+        .first()
+    )
+
+    if not submission:
+        submission = MissionSubmission(user_id=user.id, mission_id=mission.id)
+        db.add(submission)
+        db.flush()
+        db.refresh(submission)
+
+    if submission.status == SubmissionStatus.APPROVED:
+        return True
+
+    submission.comment = "Автоматическая проверка: все задания решены."
+    db.add(submission)
+    db.flush()
+    db.refresh(submission)
+    approve_submission(db, submission)
+    return True
+
+
+def evaluate_challenge(
+    db: Session,
+    *,
+    challenge: CodingChallenge,
+    user: User,
+    code: str,
+) -> AttemptEvaluation:
+    """Запускаем код пользователя и сохраняем попытку."""
+
+    _ensure_previous_challenges_solved(db, challenge=challenge, user=user)
+
+    run_result: PythonRunResult = run_user_python_code(code)
+    expected = _normalize_output(challenge.expected_output)
+    actual = _normalize_output(run_result.stdout)
+
+    is_passed = run_result.exit_code == 0 and actual == expected
+
+    attempt = CodingAttempt(
+        challenge_id=challenge.id,
+        user_id=user.id,
+        code=code,
+        stdout=run_result.stdout,
+        stderr=run_result.stderr,
+        exit_code=run_result.exit_code,
+        is_passed=is_passed,
+    )
+
+    db.add(attempt)
+    db.commit()
+    db.refresh(attempt)
+
+    mission = challenge.mission or db.query(Mission).filter(Mission.id == challenge.mission_id).first()
+    mission_completed = False
+
+    if is_passed and mission:
+        mission_completed = _finalize_mission_if_needed(
+            db,
+            mission=mission,
+            user=user,
+            challenge_ids=[item.id for item in mission.coding_challenges],
+        )
+
+    return AttemptEvaluation(attempt=attempt, mission_completed=mission_completed)
+
+
+def count_completed_challenges(db: Session, *, mission_ids: Iterable[int], user: User) -> dict[int, int]:
+    """Возвращаем количество решённых заданий по миссиям."""
+
+    mission_ids = list(mission_ids)
+    if not mission_ids:
+        return {}
+
+    rows = db.execute(
+        select(CodingChallenge.mission_id, func.count(func.distinct(CodingChallenge.id)))
+        .join(
+            CodingAttempt,
+            and_(
+                CodingAttempt.challenge_id == CodingChallenge.id,
+                CodingAttempt.user_id == user.id,
+                CodingAttempt.is_passed.is_(True),
+            ),
+        )
+        .where(CodingChallenge.mission_id.in_(mission_ids))
+        .group_by(CodingChallenge.mission_id)
+    ).all()
+
+    return {mission_id: count for mission_id, count in rows}
+

backend/app/utils/python_runner.py

@@ -0,0 +1,54 @@
+"""Запуск пользовательского Python-кода в отдельном процессе."""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+import subprocess
+import sys
+from typing import Final
+
+
+DEFAULT_TIMEOUT_SECONDS: Final[float] = 5.0
+
+
+@dataclass(slots=True)
+class PythonRunResult:
+    """Результат выполнения пользовательской программы."""
+
+    stdout: str
+    stderr: str
+    exit_code: int
+    timeout: bool = False
+
+
+def run_user_python_code(code: str, timeout: float = DEFAULT_TIMEOUT_SECONDS) -> PythonRunResult:
+    """Запускаем код в отдельном процессе и возвращаем stdout/stderr.
+
+    Код выполняется через ``sys.executable`` в режиме ``-c``. Таймаут ограничен,
+    чтобы бесконечные циклы не блокировали API. Любые ошибки компиляции или
+    выполнения попадают в ``stderr`` и возвращаются пользователю без изменений.
+    """
+
+    try:
+        completed = subprocess.run(  # noqa: PLW1510 - таймаут обрабатываем вручную
+            [sys.executable, "-c", code],
+            capture_output=True,
+            text=True,
+            timeout=timeout,
+            check=False,
+        )
+    except subprocess.TimeoutExpired as exc:
+        stderr = exc.stderr or ""
+        if stderr:
+            stderr = f"{stderr}\nПрограмма превысила лимит {timeout:.1f} сек."
+        else:
+            stderr = f"Программа превысила лимит {timeout:.1f} сек."
+        return PythonRunResult(stdout=exc.stdout or "", stderr=stderr, exit_code=124, timeout=True)
+
+    return PythonRunResult(
+        stdout=completed.stdout,
+        stderr=completed.stderr,
+        exit_code=completed.returncode,
+        timeout=False,
+    )
+

backend/tests/test_coding_mission.py

@@ -0,0 +1,107 @@
+"""Проверяем автоматические миссии на Python."""
+
+from __future__ import annotations
+
+import pytest
+from fastapi import HTTPException
+
+from app.models.coding import CodingChallenge
+from app.models.mission import Mission, MissionDifficulty, MissionSubmission, SubmissionStatus
+from app.models.user import User, UserRole
+from app.services.coding import count_completed_challenges, evaluate_challenge
+
+
+def _create_user(db_session) -> User:
+    user = User(
+        email="python@alabuga.space",
+        full_name="Python Pilot",
+        role=UserRole.PILOT,
+        hashed_password="hash",
+    )
+    db_session.add(user)
+    db_session.flush()
+    return user
+
+
+def _create_mission_with_challenges(db_session) -> tuple[Mission, list[CodingChallenge]]:
+    mission = Mission(
+        title="Учебная миссия",
+        description="Две задачи на программирование",
+        xp_reward=120,
+        mana_reward=60,
+        difficulty=MissionDifficulty.MEDIUM,
+    )
+    challenge_one = CodingChallenge(
+        mission=mission,
+        order=1,
+        title="Приветствие",
+        prompt="Выведите Привет",
+        starter_code="",
+        expected_output="Привет",
+    )
+    challenge_two = CodingChallenge(
+        mission=mission,
+        order=2,
+        title="Пока",
+        prompt="Выведите Пока",
+        starter_code="",
+        expected_output="Пока",
+    )
+    db_session.add_all([mission, challenge_one, challenge_two])
+    db_session.flush()
+    return mission, [challenge_one, challenge_two]
+
+
+def test_challenges_require_sequential_completion(db_session):
+    """Нельзя переходить к следующему заданию без успешного выполнения предыдущего."""
+
+    mission, (challenge_one, challenge_two) = _create_mission_with_challenges(db_session)
+    user = _create_user(db_session)
+
+    with pytest.raises(HTTPException):
+        evaluate_challenge(db_session, challenge=challenge_two, user=user, code="print('Пока')")
+
+    first_attempt = evaluate_challenge(db_session, challenge=challenge_one, user=user, code="print('Привет')")
+    assert first_attempt.attempt.is_passed is True
+    assert first_attempt.mission_completed is False
+
+    second_attempt = evaluate_challenge(db_session, challenge=challenge_two, user=user, code="print('Пока')")
+    assert second_attempt.attempt.is_passed is True
+    assert second_attempt.mission_completed is True
+
+    db_session.refresh(user)
+    assert user.xp == mission.xp_reward
+    assert user.mana == mission.mana_reward
+
+    submission = (
+        db_session.query(MissionSubmission)
+        .filter(MissionSubmission.user_id == user.id, MissionSubmission.mission_id == mission.id)
+        .first()
+    )
+    assert submission is not None
+    assert submission.status == SubmissionStatus.APPROVED
+
+
+def test_failed_attempt_does_not_unlock_next_challenge(db_session):
+    """Неудачные запуски фиксируются, но не засчитываются как выполненные."""
+
+    mission, (challenge_one, challenge_two) = _create_mission_with_challenges(db_session)
+    user = _create_user(db_session)
+
+    failed = evaluate_challenge(db_session, challenge=challenge_one, user=user, code="print('Не то')")
+    assert failed.attempt.is_passed is False
+    assert failed.mission_completed is False
+
+    progress = count_completed_challenges(db_session, mission_ids=[mission.id], user=user)
+    assert progress.get(mission.id, 0) == 0
+
+    with pytest.raises(HTTPException):
+        evaluate_challenge(db_session, challenge=challenge_two, user=user, code="print('Пока')")
+
+    evaluate_challenge(db_session, challenge=challenge_one, user=user, code="print('Привет')")
+    progress = count_completed_challenges(db_session, mission_ids=[mission.id], user=user)
+    assert progress.get(mission.id, 0) == 1
+
+    follow_up = evaluate_challenge(db_session, challenge=challenge_two, user=user, code="print('Пока')")
+    assert follow_up.attempt.is_passed is True
+

frontend/src/app/missions/[id]/page.tsx

@@ -1,6 +1,7 @@
 import { apiFetch } from '../../../lib/api';
 import { requireSession } from '../../../lib/auth/session';
 import { MissionSubmissionForm } from '../../../components/MissionSubmissionForm';
+import { CodingMissionPanel } from '../../../components/CodingMissionPanel';
 
 interface MissionDetail {
   id: number;
@@ -21,6 +22,9 @@ interface MissionDetail {
   locked_reasons: string[];
   is_completed: boolean;
   requires_documents: boolean;
+  has_coding_challenges: boolean;
+  coding_challenge_count: number;
+  completed_coding_challenges: number;
 }
 
 async function fetchMission(id: number, token: string) {
@@ -46,11 +50,40 @@ interface MissionPageProps {
   params: { id: string };
 }
 
+interface CodingChallengeState {
+  id: number;
+  order: number;
+  title: string;
+  prompt: string;
+  starter_code: string | null;
+  is_passed: boolean;
+  is_unlocked: boolean;
+  last_submitted_code: string | null;
+  last_stdout: string | null;
+  last_stderr: string | null;
+  last_exit_code: number | null;
+  updated_at: string | null;
+}
+
+interface CodingMissionState {
+  mission_id: number;
+  total_challenges: number;
+  completed_challenges: number;
+  current_challenge_id: number | null;
+  is_mission_completed: boolean;
+  challenges: CodingChallengeState[];
+}
+
 export default async function MissionPage({ params }: MissionPageProps) {
   const missionId = Number(params.id);
   // Даже при прямом переходе на URL миссия доступна только авторизованным пользователям.
   const session = await requireSession();
   const { mission, submission } = await fetchMission(missionId, session.token);
+  const codingState = mission.has_coding_challenges
+    ? await apiFetch<CodingMissionState>(`/api/missions/${missionId}/coding/challenges`, {
+        authToken: session.token
+      })
+    : null;
 
   return (
     <section>
@@ -60,6 +93,11 @@ export default async function MissionPage({ params }: MissionPageProps) {
       <p style={{ marginTop: '1rem' }}>
         Награда: {mission.xp_reward} XP · {mission.mana_reward} ⚡
       </p>
+      {mission.has_coding_challenges && (
+        <p style={{ marginTop: '0.5rem', color: 'var(--accent-light)' }}>
+          Прогресс тренажёра: {mission.completed_coding_challenges}/{mission.coding_challenge_count} заданий
+        </p>
+      )}
       {mission.is_completed && (
         <div
           className="card"
@@ -71,7 +109,9 @@ export default async function MissionPage({ params }: MissionPageProps) {
         >
           <strong>Миссия завершена</strong>
           <p style={{ marginTop: '0.5rem', color: 'var(--text-muted)' }}>
-            HR уже подтвердил выполнение. Вы можете просмотреть прикреплённые документы ниже.
+            {mission.has_coding_challenges
+              ? 'Система проверила код автоматически и уже начислила награды.'
+              : 'HR уже подтвердил выполнение. Вы можете просмотреть прикреплённые документы ниже.'}
           </p>
         </div>
       )}
@@ -96,6 +136,14 @@ export default async function MissionPage({ params }: MissionPageProps) {
           {mission.competency_rewards.length === 0 && <li>Нет прокачки компетенций.</li>}
         </ul>
       </div>
+      {mission.has_coding_challenges ? (
+        <CodingMissionPanel
+          missionId={mission.id}
+          token={session.token}
+          initialState={codingState}
+          initialCompleted={mission.is_completed}
+        />
+      ) : (
         <MissionSubmissionForm
           missionId={mission.id}
           token={session.token}
@@ -104,6 +152,7 @@ export default async function MissionPage({ params }: MissionPageProps) {
           requiresDocuments={mission.requires_documents}
           submission={submission ?? undefined}
         />
+      )}
     </section>
   );
 }

frontend/src/components/CodingMissionPanel.tsx

@@ -0,0 +1,266 @@
+'use client';
+
+import { useEffect, useMemo, useState } from 'react';
+import { apiFetch } from '../lib/api';
+
+interface CodingChallengeState {
+  id: number;
+  order: number;
+  title: string;
+  prompt: string;
+  starter_code: string | null;
+  is_passed: boolean;
+  is_unlocked: boolean;
+  last_submitted_code: string | null;
+  last_stdout: string | null;
+  last_stderr: string | null;
+  last_exit_code: number | null;
+  updated_at: string | null;
+}
+
+interface CodingMissionState {
+  mission_id: number;
+  total_challenges: number;
+  completed_challenges: number;
+  current_challenge_id: number | null;
+  is_mission_completed: boolean;
+  challenges: CodingChallengeState[];
+}
+
+interface CodingMissionPanelProps {
+  missionId: number;
+  token?: string;
+  initialState: CodingMissionState | null;
+  initialCompleted?: boolean;
+}
+
+interface RunResult {
+  stdout: string;
+  stderr: string;
+  exit_code: number;
+  is_passed: boolean;
+  mission_completed: boolean;
+  expected_output?: string | null;
+}
+
+export function CodingMissionPanel({ missionId, token, initialState, initialCompleted = false }: CodingMissionPanelProps) {
+  const [state, setState] = useState<CodingMissionState | null>(initialState);
+  const [missionCompleted, setMissionCompleted] = useState(initialState?.is_mission_completed || initialCompleted);
+  const [activeChallengeId, setActiveChallengeId] = useState<number | null>(
+    initialState?.current_challenge_id ?? initialState?.challenges?.[0]?.id ?? null
+  );
+  const [editorCode, setEditorCode] = useState<string>(() => {
+    const active = initialState?.challenges.find((challenge) => challenge.id === activeChallengeId);
+    if (!active) {
+      return '';
+    }
+    return active.last_submitted_code ?? active.starter_code ?? '';
+  });
+  const [status, setStatus] = useState<string | null>(null);
+  const [runResult, setRunResult] = useState<RunResult | null>(null);
+  const [loading, setLoading] = useState(false);
+
+  const activeChallenge = useMemo(() => {
+    if (!state || !state.challenges.length) {
+      return null;
+    }
+    const targetId = state.current_challenge_id ?? activeChallengeId;
+    if (targetId == null) {
+      return null;
+    }
+    return state.challenges.find((challenge) => challenge.id === targetId) ?? null;
+  }, [state, activeChallengeId]);
+
+  useEffect(() => {
+    if (!state || !state.challenges.length) {
+      return;
+    }
+    const nextActiveId = state.current_challenge_id ?? state.challenges[state.challenges.length - 1].id;
+    if (nextActiveId !== activeChallengeId) {
+      setActiveChallengeId(nextActiveId);
+      const nextChallenge = state.challenges.find((challenge) => challenge.id === nextActiveId);
+      const nextCode = nextChallenge?.last_submitted_code ?? nextChallenge?.starter_code ?? '';
+      setEditorCode(nextCode);
+      setRunResult(null);
+      setStatus(null);
+    }
+    setMissionCompleted(state.is_mission_completed);
+  }, [state, activeChallengeId]);
+
+  useEffect(() => {
+    if (!activeChallenge) {
+      return;
+    }
+    if (editorCode) {
+      return;
+    }
+    const baseCode = activeChallenge.last_submitted_code ?? activeChallenge.starter_code ?? '';
+    setEditorCode(baseCode);
+  }, [activeChallenge]);
+
+  if (!state) {
+    return (
+      <div className="card" style={{ marginTop: '2rem' }}>
+        <p>
+          Не удалось загрузить задания для миссии. Попробуйте обновить страницу или обратитесь к HR, чтобы
+          проверить настройки миссии.
+        </p>
+      </div>
+    );
+  }
+
+  const handleRefresh = async () => {
+    if (!token) {
+      return;
+    }
+    const updated = await apiFetch<CodingMissionState>(`/api/missions/${missionId}/coding/challenges`, {
+      authToken: token
+    });
+    setState(updated);
+  };
+
+  const handleRun = async () => {
+    if (!token) {
+      setStatus('Не удалось получить токен авторизации. Перезайдите в систему.');
+      return;
+    }
+    if (!activeChallenge) {
+      setStatus('Все задания выполнены — можно переходить к другим миссиям.');
+      return;
+    }
+    if (!editorCode.trim()) {
+      setStatus('Добавьте решение в редакторе, прежде чем запускать проверку.');
+      return;
+    }
+
+    try {
+      setLoading(true);
+      setStatus(null);
+      const result = await apiFetch<RunResult>(
+        `/api/missions/${missionId}/coding/challenges/${activeChallenge.id}/run`,
+        {
+          method: 'POST',
+          body: JSON.stringify({ code: editorCode }),
+          authToken: token
+        }
+      );
+      setRunResult(result);
+      setMissionCompleted(result.mission_completed);
+      setStatus(
+        result.is_passed
+          ? 'Отлично! Задание пройдено. Можно переходить к следующему шагу.'
+          : 'Проверка не пройдена. Сверьтесь с выводом программы и подсказками.'
+      );
+      await handleRefresh();
+    } catch (error) {
+      if (error instanceof Error) {
+        setStatus(error.message);
+      } else {
+        setStatus('Неожиданная ошибка при выполнении проверки. Попробуйте повторить позже.');
+      }
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  return (
+    <div style={{ marginTop: '2rem', display: 'flex', flexDirection: 'column', gap: '1.5rem' }}>
+      {state.challenges.map((challenge) => {
+        const isActive = activeChallenge?.id === challenge.id && !missionCompleted;
+        return (
+          <div key={challenge.id} className="card" style={{ border: challenge.is_passed ? '1px solid rgba(85,239,196,0.4)' : undefined }}>
+            <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
+              <h3 style={{ marginBottom: '0.25rem' }}>
+                {challenge.order}. {challenge.title}
+              </h3>
+              {challenge.is_passed && <span style={{ color: '#55efc4' }}>✓ Готово</span>}
+            </div>
+            <p style={{ color: 'var(--text-muted)' }}>{challenge.prompt}</p>
+            {!challenge.is_unlocked && !challenge.is_passed && (
+              <p style={{ marginTop: '0.75rem', color: 'var(--text-muted)' }}>
+                🔒 Задание откроется после успешного решения предыдущих пунктов.
+              </p>
+            )}
+            {challenge.is_passed && challenge.last_stdout && (
+              <div style={{ marginTop: '0.75rem' }}>
+                <small style={{ color: 'var(--text-muted)' }}>Последний вывод программы:</small>
+                <pre style={{ background: 'rgba(99, 110, 114, 0.2)', padding: '0.75rem', borderRadius: '12px', overflowX: 'auto' }}>
+                  {challenge.last_stdout}
+                </pre>
+              </div>
+            )}
+            {isActive && (
+              <div style={{ marginTop: '1rem', display: 'flex', flexDirection: 'column', gap: '1rem' }}>
+                <label>
+                  <span style={{ display: 'block', marginBottom: '0.5rem' }}>Редактор кода</span>
+                  <textarea
+                    value={editorCode}
+                    onChange={(event) => setEditorCode(event.target.value)}
+                    rows={12}
+                    style={{ width: '100%', borderRadius: '12px', padding: '0.75rem', fontFamily: 'monospace' }}
+                    disabled={loading || missionCompleted}
+                  />
+                </label>
+                <button
+                  type="button"
+                  className="primary"
+                  onClick={handleRun}
+                  disabled={loading || missionCompleted}
+                >
+                  {missionCompleted ? 'Миссия завершена' : loading ? 'Выполняем код...' : 'Проверить'}
+                </button>
+                {status && (
+                  <p
+                    style={{
+                      marginTop: '-0.25rem',
+                      color: status.startsWith('Отлично') ? 'var(--accent-light)' : status.includes('Проверка') ? 'var(--error)' : 'var(--text-muted)'
+                    }}
+                  >
+                    {status}
+                  </p>
+                )}
+                {runResult && (
+                  <div>
+                    <details open>
+                      <summary style={{ cursor: 'pointer', color: 'var(--accent)' }}>Результат последнего запуска</summary>
+                      <div style={{ marginTop: '0.5rem' }}>
+                        <strong>stdout:</strong>
+                        <pre style={{ background: 'rgba(108, 92, 231, 0.15)', padding: '0.75rem', borderRadius: '12px', overflowX: 'auto' }}>
+                          {runResult.stdout || '<пусто>'}
+                        </pre>
+                        <strong>stderr:</strong>
+                        <pre style={{ background: 'rgba(225, 112, 85, 0.15)', padding: '0.75rem', borderRadius: '12px', overflowX: 'auto' }}>
+                          {runResult.stderr || '<пусто>'}
+                        </pre>
+                        <p style={{ marginTop: '0.5rem', color: 'var(--text-muted)' }}>
+                          Код завершился с статусом {runResult.exit_code}.
+                        </p>
+                        {runResult.expected_output && (
+                          <div style={{ marginTop: '0.5rem' }}>
+                            <strong>Ожидаемый вывод:</strong>
+                            <pre style={{ background: 'rgba(99, 110, 114, 0.2)', padding: '0.75rem', borderRadius: '12px', overflowX: 'auto' }}>
+                              {runResult.expected_output}
+                            </pre>
+                          </div>
+                        )}
+                      </div>
+                    </details>
+                  </div>
+                )}
+              </div>
+            )}
+          </div>
+        );
+      })}
+      {missionCompleted && (
+        <div className="card" style={{ border: '1px solid rgba(85,239,196,0.35)', background: 'rgba(85,239,196,0.12)' }}>
+          <h3>Все задания выполнены!</h3>
+          <p style={{ marginTop: '0.5rem', color: 'var(--text-muted)' }}>
+            Система уже зачислила опыт и ману за миссию. Можно вернуться к списку миссий и выбрать следующее испытание.
+          </p>
+        </div>
+      )}
+    </div>
+  );
+}
+

frontend/src/components/MissionList.tsx

@@ -14,6 +14,9 @@ export interface MissionSummary {
   locked_reasons: string[];
   is_completed: boolean;
   requires_documents: boolean;
+  has_coding_challenges: boolean;
+  coding_challenge_count: number;
+  completed_coding_challenges: number;
 }
 
 const Card = styled.div`
@@ -38,7 +41,9 @@ export function MissionList({ missions }: { missions: MissionSummary[] }) {
         const actionLabel = completed
           ? 'Миссия выполнена'
           : mission.is_available
-          ? 'Открыть брифинг'
+          ? mission.has_coding_challenges
+            ? 'Решать задачи'
+            : 'Открыть брифинг'
           : 'Заблокировано';
 
         return (
@@ -54,6 +59,11 @@ export function MissionList({ missions }: { missions: MissionSummary[] }) {
             )}
             <h3 style={{ marginBottom: '0.5rem' }}>{mission.title}</h3>
             <p style={{ color: 'var(--text-muted)', minHeight: '3rem' }}>{mission.description}</p>
+            {mission.has_coding_challenges && (
+              <p style={{ marginTop: '0.5rem', color: 'var(--accent-light)' }}>
+                💻 Прогресс: {mission.completed_coding_challenges}/{mission.coding_challenge_count} заданий
+              </p>
+            )}
             <p style={{ marginTop: '1rem' }}>{mission.xp_reward} XP · {mission.mana_reward} ⚡</p>
             {locked && mission.locked_reasons.length > 0 && (
               <p style={{ color: 'var(--error)', fontSize: '0.85rem' }}>{mission.locked_reasons[0]}</p>

scripts/seed_data.py

@@ -16,6 +16,7 @@ from app.core.security import get_password_hash
 from app.db.session import SessionLocal
 from app.models.artifact import Artifact, ArtifactRarity
 from app.models.branch import Branch, BranchMission
+from app.models.coding import CodingChallenge
 from app.models.mission import Mission, MissionCompetencyReward, MissionDifficulty
 from app.models.rank import Rank, RankCompetencyRequirement, RankMissionRequirement
 from app.models.onboarding import OnboardingSlide