migration and splitting AareLC

src/server/runtime_config.py

@@ -0,0 +1,42 @@
+import json
+from pathlib import Path
+from typing import Any
+
+
+def load_runtime_config(path: str) -> tuple[dict[str, Any], str | None]:
+    p = Path(path).expanduser()
+    if not p.exists():
+        return {}, None
+    try:
+        data = json.loads(p.read_text(encoding="utf-8"))
+    except Exception as e:
+        return {}, f"Failed to parse config '{p}': {e}"
+    if not isinstance(data, dict):
+        return {}, f"Config '{p}' must be a JSON object"
+    return data, None
+
+
+def save_runtime_config(path: str, config: dict[str, Any]) -> str | None:
+    p = Path(path).expanduser()
+    try:
+        p.parent.mkdir(parents=True, exist_ok=True)
+        p.write_text(json.dumps(config, indent=2, sort_keys=True), encoding="utf-8")
+        return None
+    except Exception as e:
+        return f"Failed to save config '{p}': {e}"
+
+
+def collect_cli_overrides(argv: list[str]) -> set[str]:
+    """
+    Collect option names explicitly passed on CLI, normalized to argparse dest form.
+    Example: --focus-epics-enabled -> focus_epics_enabled
+    """
+    out: set[str] = set()
+    for token in argv[1:]:
+        if not token.startswith("--"):
+            continue
+        key = token[2:]
+        if "=" in key:
+            key = key.split("=", 1)[0]
+        out.add(key.replace("-", "_"))
+    return out