feat: add shared runtime with FastAPI job server and safety pipeline

src/config.py

@@ -0,0 +1,52 @@
+from __future__ import annotations
+
+import os
+from dataclasses import dataclass
+from pathlib import Path
+
+from dotenv import load_dotenv
+
+
+def _env_bool(name: str, default: bool = False) -> bool:
+    raw = os.getenv(name)
+    if raw is None:
+        return default
+    return raw.strip().lower() in {"1", "true", "yes", "on"}
+
+
+@dataclass(frozen=True)
+class AppConfig:
+    openai_api_key: str
+    screenjob_token: str
+    disable_ui: bool
+    default_model: str
+    safety_model: str
+    host: str
+    port: int
+    runs_dir: Path
+    db_path: Path
+
+
+def load_app_config(cwd: Path) -> AppConfig:
+    load_dotenv()
+    openai_api_key = os.getenv("OPENAI_API_KEY", "").strip()
+    screenjob_token = os.getenv("SCREENJOB_TOKEN", "").strip()
+    default_model = os.getenv("SCREENJOB_DEFAULT_MODEL", "gpt-5.4-mini").strip() or "gpt-5.4-mini"
+    safety_model = os.getenv("SCREENJOB_SAFETY_MODEL", "gpt-5.4-mini").strip() or "gpt-5.4-mini"
+    host = os.getenv("SCREENJOB_HOST", "127.0.0.1").strip() or "127.0.0.1"
+    port = int(os.getenv("SCREENJOB_PORT", "8787").strip() or "8787")
+    runs_dir = cwd / "screenjob_runs"
+    db_path = cwd / "screenjob.db"
+    disable_ui = _env_bool("DISABLE_UI", default=False)
+    return AppConfig(
+        openai_api_key=openai_api_key,
+        screenjob_token=screenjob_token,
+        disable_ui=disable_ui,
+        default_model=default_model,
+        safety_model=safety_model,
+        host=host,
+        port=port,
+        runs_dir=runs_dir,
+        db_path=db_path,
+    )
+