Fix base parts not generating

README.md

@@ -182,7 +182,6 @@ generated_assets:
           kind: trailing_numeric_suffix
           group_from: first_path_segment
         parts_rows:
-          null_undiscovered_rows: true
           row_defaults:
             COSTMODIFIER: "0"
           acbonus:
@@ -274,11 +273,11 @@ ACBONUS values before module overrides are applied. The
 IDs so higher part rows can sort before lower rows in the toolset; the legacy
 `descending_row_id_sort_key` strategy remains available for repositories that
 already depend on it. Per-dataset policies such as `chest: fixed 0.00` can
-override the default. When `null_undiscovered_rows` is true, authored part rows
-without discovered model IDs are omitted from the collected row set so dense
-2DA output writes them as `****` null rows. Authored source ACBONUS values are
-not authoritative when this policy is configured; files under `parts/modules`
-remain the final override layer.
+override the default. Authored source ACBONUS values are not authoritative when
+this policy is configured, except that authored `****` values remain null
+unless model discovery activates the row. Dense gaps without authored rows or
+discovered part models are emitted as `****` null rows. Files under
+`parts/modules` remain the final override layer.
 
 Extraction is deliberately guarded because it writes source files from binary
 archives. `extract.archives` is a list of glob patterns relative to