fix: align engine task bootstrap scaffold

engine/__init__.py

@@ -1,27 +1 @@
-from .models import (
-    ArtifactsConfig,
-    BudgetConfig,
-    ConstraintConfig,
-    LoggingConfig,
-    MutationConfig,
-    ObjectiveConfig,
-    PolicyConfig,
-    RunnerConfig,
-    ScorerConfig,
-    ScorerParseConfig,
-    TaskConfig,
-)
-
-__all__ = [
-    "ArtifactsConfig",
-    "BudgetConfig",
-    "ConstraintConfig",
-    "LoggingConfig",
-    "MutationConfig",
-    "ObjectiveConfig",
-    "PolicyConfig",
-    "RunnerConfig",
-    "ScorerConfig",
-    "ScorerParseConfig",
-    "TaskConfig",
-]
+"""Artifact Loop Engine package."""

engine/models.py

@@ -1,84 +1,115 @@
 from dataclasses import dataclass, field
+from pathlib import Path
 from typing import Literal
 
 
 @dataclass(frozen=True)
-class ArtifactsConfig:
+class ArtifactSpec:
     include: list[str] = field(default_factory=list)
     exclude: list[str] = field(default_factory=list)
     max_files_per_iteration: int = 0
 
 
 @dataclass(frozen=True)
-class MutationConfig:
+class MutationSpec:
     mode: str = ""
     allowed_file_types: list[str] = field(default_factory=list)
     max_changed_lines: int = 0
 
 
 @dataclass(frozen=True)
-class RunnerConfig:
+class RunnerSpec:
     command: str = ""
-    cwd: str = "."
+    cwd: Path = Path(".")
     timeout_seconds: int = 0
 
 
 @dataclass(frozen=True)
-class ScorerParseConfig:
+class ScorerParseSpec:
     format: str = ""
     score_field: str = ""
     metrics_field: str = ""
 
 
 @dataclass(frozen=True)
-class ScorerConfig:
+class ScorerSpec:
     type: str = ""
     command: str = ""
-    parse: ScorerParseConfig = field(default_factory=ScorerParseConfig)
+    parse: ScorerParseSpec = field(default_factory=ScorerParseSpec)
 
 
 @dataclass(frozen=True)
-class ObjectiveConfig:
+class ObjectiveSpec:
     primary_metric: str = ""
     direction: Literal["maximize", "minimize"] = "maximize"
 
 
 @dataclass(frozen=True)
-class ConstraintConfig:
+class ConstraintSpec:
     metric: str = ""
     op: str = ""
     value: int | float = 0
 
 
 @dataclass(frozen=True)
-class PolicyConfig:
+class PolicySpec:
     keep_if: str = ""
     tie_breakers: list[str] = field(default_factory=list)
     on_failure: str = ""
 
 
 @dataclass(frozen=True)
-class BudgetConfig:
+class BudgetSpec:
     max_iterations: int = 0
     max_failures: int = 0
 
 
 @dataclass(frozen=True)
-class LoggingConfig:
-    results_file: str = ""
-    candidate_dir: str = ""
+class LoggingSpec:
+    results_file: Path = Path()
+    candidate_dir: Path = Path()
 
 
 @dataclass(frozen=True)
-class TaskConfig:
+class TaskSpec:
     id: str = ""
     description: str = ""
-    artifacts: ArtifactsConfig = field(default_factory=ArtifactsConfig)
-    mutation: MutationConfig = field(default_factory=MutationConfig)
-    runner: RunnerConfig = field(default_factory=RunnerConfig)
-    scorer: ScorerConfig = field(default_factory=ScorerConfig)
-    objective: ObjectiveConfig = field(default_factory=ObjectiveConfig)
-    constraints: list[ConstraintConfig] = field(default_factory=list)
-    policy: PolicyConfig = field(default_factory=PolicyConfig)
-    budget: BudgetConfig = field(default_factory=BudgetConfig)
-    logging: LoggingConfig = field(default_factory=LoggingConfig)
+    root_dir: Path = Path(".")
+    artifacts: ArtifactSpec = field(default_factory=ArtifactSpec)
+    mutation: MutationSpec = field(default_factory=MutationSpec)
+    runner: RunnerSpec = field(default_factory=RunnerSpec)
+    scorer: ScorerSpec = field(default_factory=ScorerSpec)
+    objective: ObjectiveSpec = field(default_factory=ObjectiveSpec)
+    constraints: list[ConstraintSpec] = field(default_factory=list)
+    policy: PolicySpec = field(default_factory=PolicySpec)
+    budget: BudgetSpec = field(default_factory=BudgetSpec)
+    logging: LoggingSpec = field(default_factory=LoggingSpec)
+
+
+@dataclass(frozen=True)
+class BaselineSnapshot:
+    root_dir: Path = Path(".")
+    files: dict[str, str] = field(default_factory=dict)
+
+
+@dataclass(frozen=True)
+class ScoreResult:
+    score: float = 0.0
+    metrics: dict[str, float | int] = field(default_factory=dict)
+
+
+@dataclass(frozen=True)
+class DecisionResult:
+    keep: bool = False
+    reason: str = ""
+    primary_metric: str = ""
+    primary_value: float = 0.0
+
+
+@dataclass(frozen=True)
+class RunResult:
+    task_id: str = ""
+    iteration: int = 0
+    score: ScoreResult = field(default_factory=ScoreResult)
+    decision: DecisionResult = field(default_factory=DecisionResult)
+    baseline: BaselineSnapshot = field(default_factory=BaselineSnapshot)

tests/__init__.py

@@ -1 +1 @@
-
+"""Unit tests for the artifact loop engine."""