feat(ledger): CSS derive families are names, never bodies — name floor 2 for css, dup: grouping sym-only; derive line says "repeated name" and dismisses scoped-css; plugin 0.1.41 (note #2917)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/test_integration_shape_classify.py

@@ -588,21 +588,30 @@ async def test_derive_groups_land_on_rows_and_in_the_summary(seeded):
     assert summary["derive_groups"][1]["label"] == ".card"
     assert summary["derive_groups"][0]["size"] == 2 and summary["derive_groups"][1]["size"] == 3
 
-    # One of the css copies gets judged → the group shrinks on the next pass.
+    # One of the css copies gets judged → the group shrinks on the next pass
+    # but stays a family: a class in two files is already a recipe living in
+    # two places (css name floor 2, note 2917). Judge the second and it's gone.
     await classify_shapes(owner, pid, [
         {"path": "b/z.css", "symbol": "card", "status": "exempt", "reason": "print sheet"},
     ])
     await apply_derive_groups(pid)
     rows, _ = await list_project_shapes(owner, pid, proposal="derive")
-    assert {r.symbol for r in rows} == {"slug"}                   # 2 files < the name floor
+    assert {r.symbol for r in rows} == {"slug", "card"}
+    assert {r.path for r in rows if r.symbol == "card"} == {"b/x.css", "b/y.css"}
+    await classify_shapes(owner, pid, [
+        {"path": "b/y.css", "symbol": "card", "status": "exempt", "reason": "print sheet"},
+    ])
+    await apply_derive_groups(pid)
+    rows, _ = await list_project_shapes(owner, pid, proposal="derive")
+    assert {r.symbol for r in rows} == {"slug"}                   # 1 file < the css name floor
 
 
 @pytest.mark.integration
 async def test_write_time_derive_names_the_family_or_the_canon_for_a_name(seeded):
-    """#2900: against real rows — a name in a dup family → the family (other
-    files, count); a name whose canonical row lives elsewhere → that canon;
-    a judged row at the path, the canon's own file, or an unknown name →
-    silence."""
+    """#2900: against real rows — a name in a family → the family (other
+    files, count; for CSS a NAME family, never a body one — note 2917); a
+    name whose canonical row lives elsewhere → that canon; a judged row at
+    the path, the canon's own file, or an unknown name → silence."""
     from scribe.services.shape_ledger import apply_derive_groups, write_time_derive
 
     owner, pid, sid = seeded["owner"], seeded["pid"], seeded["snippet"]
@@ -622,9 +631,10 @@ async def test_write_time_derive_names_the_family_or_the_canon_for_a_name(seeded
     out = await write_time_derive(pid, "v/D.vue", [("css", "log-empty"), ("css", "unknown")])
     assert len(out) == 1 and out[0]["symbol"] == "log-empty" and out[0]["kind"] == "css"
     fam = out[0]["family"]
-    assert fam["identical"] is True and fam["label"] == ".log-empty"
+    # Three identical bodies, and still a NAME family: CSS never groups by body.
+    assert fam["identical"] is False and fam["label"] == ".log-empty"
     assert fam["files"] == ["v/A.vue", "v/B.vue", "v/C.vue"] and fam["file_count"] == 3
-    assert out[0]["key"] == fam["group"] and fam["group"].startswith("dup:")
+    assert out[0]["key"] == fam["group"] == "name:css:log-empty"
     # Editing one existing member still names the OTHER members.
     out = await write_time_derive(pid, "v/A.vue", [("css", "log-empty")])
     assert out[0]["family"]["files"] == ["v/B.vue", "v/C.vue"] and out[0]["family"]["size"] == 3