Fix ablation config path resolution

example/run_ablations.py

@@ -93,6 +93,32 @@ def write_json(path: Path, obj: Dict) -> None:
         json.dump(obj, f, indent=2)
 
 
+def absolutize_config_paths(cfg: Dict, base_config_path: Path) -> Dict:
+    """Freeze path-like config values so generated ablation configs remain runnable."""
+    cfg = dict(cfg)
+    path_keys = ["data_path", "split_path", "stats_path", "vocab_path", "out_dir"]
+    glob_keys = ["data_glob"]
+
+    for key in path_keys:
+        value = cfg.get(key)
+        if not value:
+            continue
+        path = Path(value)
+        if not path.is_absolute():
+            cfg[key] = str((base_config_path.parent / path).resolve())
+
+    for key in glob_keys:
+        value = cfg.get(key)
+        if not value:
+            continue
+        path = Path(value)
+        if not path.is_absolute():
+            resolved = base_config_path.parent / path
+            cfg[key] = str(resolved)
+
+    return cfg
+
+
 def selected_variants(arg: str) -> List[str]:
     if not arg:
         return list(DEFAULT_ABLATIONS.keys())
@@ -153,7 +179,7 @@ def main():
 
     generated_configs: Dict[str, Path] = {}
     for variant in variants:
-        cfg = dict(base_cfg)
+        cfg = absolutize_config_paths(base_cfg, config_path)
         cfg.update(DEFAULT_ABLATIONS[variant])
         cfg_path = out_root / "configs" / f"{variant}.json"
         write_json(cfg_path, cfg)