vault-librarian: drop .00 category-note check per Ryan's 2026-07-22 ruling

vault-librarian.py

@@ -61,15 +61,10 @@ def check_structure():
         for fn in fns:
             if vl.EXTEND_RE.match(fn):
                 out["extend_notation"].append(os.path.relpath(os.path.join(dp, fn), vl.VAULT))
-    # (b) missing .00 per category + (c) missing folder-note per structural folder
-    for code, rel in s["cats"].items():
-        catf = os.path.join(vl.VAULT, rel)
-        has_dot00 = any(vl.id_code(d) == code + ".00"
-                        for d in os.listdir(catf) if os.path.isdir(os.path.join(catf, d)))
-        # a .00 may also be a bare note; check for any NN.00 leaf
-        if not has_dot00:
-            out["missing_dot00"].append(code)
-    # folder-notes: every area/cat/id folder should contain <name>.md
+    # (b) .00 category-management notes are NOT a vault-wide requirement (ruling 2026-07-22:
+    # category-level "about this category" info can live in the category's own SYS.AC note;
+    # .00 is only added ad-hoc when a category needs its own inbox/archive/store). Not checked.
+    # (c) missing folder-note per structural folder
     for level in ("areas", "cats", "ids"):
         for code, rel in s[level].items():
             f = os.path.join(vl.VAULT, rel)