add uncommitted files

scripts/msvc_harness/models.py

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+from dataclasses import dataclass
+from enum import Enum
+from pathlib import Path
+
+
+class ProjectKind(Enum):
+    CMAKE = "cmake"
+    MSBUILD = "msbuild"
+
+
+class ResultCheckKind(Enum):
+    CMAKE_COMPILER_IS_MSVC = "cmake_compiler_is_msvc"
+    CTEST_HAS_TESTS = "ctest_has_tests"
+
+
+@dataclass(frozen=True)
+class CMakeConfig:
+    source_dir: Path
+    binary_dir: Path | None = None
+    configure_preset: str | None = None
+    build_preset: str | None = None
+    test_preset: str | None = None
+
+
+@dataclass(frozen=True)
+class MSBuildConfig:
+    solution: Path | None = None
+    configuration: str = "Debug"
+    platform: str = "x64"
+    test_command: tuple[str, ...] | None = None
+
+
+@dataclass(frozen=True)
+class TDDConfig:
+    test_roots: tuple[Path, ...]
+    test_patterns: tuple[str, ...]
+    exclude: tuple[str, ...] = ()
+
+
+@dataclass(frozen=True)
+class HarnessConfig:
+    version: int
+    project_type: str
+    cmake: CMakeConfig
+    msbuild: MSBuildConfig
+    tdd: TDDConfig
+
+
+@dataclass(frozen=True)
+class ProjectSelection:
+    kind: ProjectKind
+    project_file: Path
+
+
+@dataclass(frozen=True)
+class DiscoveryResult:
+    selection: ProjectSelection | None
+    cpp_files: tuple[Path, ...] = ()
+
+
+@dataclass(frozen=True)
+class Toolchain:
+    installation: Path
+    msbuild: Path
+    cmake: Path | None = None
+    ctest: Path | None = None
+
+
+@dataclass(frozen=True)
+class CommandSpec:
+    argv: tuple[str, ...]
+    cwd: Path
+    stage: str
+    timeout_seconds: int = 1800
+
+
+@dataclass(frozen=True)
+class ResultCheck:
+    kind: ResultCheckKind
+    path: Path | None = None
+
+
+@dataclass(frozen=True)
+class ValidationStep:
+    command: CommandSpec
+    checks: tuple[ResultCheck, ...] = ()
+
+
+@dataclass(frozen=True)
+class ValidationPlan:
+    project_kind: ProjectKind
+    steps: tuple[ValidationStep, ...]
+
+
+@dataclass(frozen=True)
+class CommandResult:
+    command: CommandSpec
+    returncode: int
+    stdout: str
+    stderr: str