Added more folders and restructured classes inside them.

src/ptdiag/artifacts.py

@@ -0,0 +1,22 @@
+"""Generated diagnostic output paths for checkout-only experiments."""
+
+from __future__ import annotations
+
+import os
+from pathlib import Path
+from typing import Mapping
+
+from .config import repository_root
+
+
+RESULTS_ROOT_ENVIRONMENT_VARIABLE = "PTDIAG_RESULTS_ROOT"
+
+
+def default_results_root(environment: Mapping[str, str] | None = None) -> Path:
+	"""Return the configurable root for generated diagnostic evidence."""
+
+	values = os.environ if environment is None else environment
+	explicit = values.get(RESULTS_ROOT_ENVIRONMENT_VARIABLE, "").strip()
+	if explicit:
+		return Path(explicit).expanduser().absolute()
+	return repository_root() / ".artifacts/diagnostics/results"