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_write_path_trigger.py

@@ -1250,13 +1250,16 @@ async def test_the_write_time_derive_check_names_a_family_or_a_canon_in_band():
     channel silences a family already named."""
     from scribe.services import plugin_context as pc
     found = [
-        {"symbol": "log-empty", "kind": "css", "key": "dup:483a",
-         "family": {"group": "dup:483a", "label": ".log-empty", "identical": True,
+        {"symbol": "log-empty", "kind": "css", "key": "name:css:log-empty",
+         "family": {"group": "name:css:log-empty", "label": ".log-empty", "identical": False,
                     "files": ["a/TaskLogSection.vue", "a/WorkspaceTaskPanel.vue"],
                     "file_count": 5, "size": 6}},
         {"symbol": "btn-primary", "kind": "css", "key": "canon:2855",
          "canon": {"snippet_id": 2855, "path": "frontend/src/assets/components.css",
                    "label": ".btn-primary"}},
+        {"symbol": "slugify", "kind": "sym", "key": "dup:483a",
+         "family": {"group": "dup:483a", "label": "slugify", "identical": True,
+                    "files": ["a/x.py", "a/y.py"], "file_count": 2, "size": 3}},
         {"symbol": "load", "kind": "sym", "key": "name:sym:load",
          "family": {"group": "name:sym:load", "label": "load", "identical": False,
                     "files": ["a/X.vue", "a/Y.vue", "a/Z.vue"], "file_count": 3, "size": 4}},
@@ -1274,20 +1277,27 @@ async def test_the_write_time_derive_check_names_a_family_or_a_canon_in_band():
          patch.object(pc.shape_ledger_svc, "write_time_derive", check):
         out = await pc.build_write_path_hint(
             1, "frontend/src/components/New.vue", code=REAL_CODE, project_id=24,
-            stamp_shapes=[("css", "log-empty"), ("css", "btn-primary"), ("sym", "load")],
+            stamp_shapes=[("css", "log-empty"), ("css", "btn-primary"), ("sym", "slugify"),
+                          ("sym", "load")],
             exclude_derive=["name:sym:load"],
         )
     check.assert_awaited_once_with(24, "frontend/src/components/New.vue",
-                                   [("css", "log-empty"), ("css", "btn-primary"), ("sym", "load")])
-    # The excluded family is gone; the other two render and are keyed.
-    assert [d["key"] for d in out["derive"]] == ["dup:483a", "canon:2855"]
-    assert out["derive_keys"] == ["dup:483a", "canon:2855"]
+                                   [("css", "log-empty"), ("css", "btn-primary"),
+                                    ("sym", "slugify"), ("sym", "load")])
+    # The excluded family is gone; the other three render and are keyed.
+    assert [d["key"] for d in out["derive"]] == ["name:css:log-empty", "canon:2855", "dup:483a"]
+    assert out["derive_keys"] == ["name:css:log-empty", "canon:2855", "dup:483a"]
     ctx = out["context"]
     assert "Shape ledger at `frontend/src/components/New.vue`" in ctx
-    assert "`.log-empty` is a duplicate family with no canon — identical body in 5 other file(s): " \
+    # A CSS family is a repeated NAME (note 2917) and its dismissal is scoped-css;
+    # a code dup family is an identical body and dismisses as convention-plumbing.
+    assert "`.log-empty` is a repeated name with no canon — defined in 5 other file(s): " \
            "`a/TaskLogSection.vue`, `a/WorkspaceTaskPanel.vue` +3 more; derive it now" in ctx
+    assert "`slugify` is a duplicate family with no canon — identical body in 2 other file(s): " \
+           "`a/x.py`, `a/y.py`; derive it now" in ctx
     assert "`.btn-primary` is canon — snippet #2855 at `frontend/src/assets/components.css`" in ctx
-    assert "convention-plumbing" in ctx
+    assert 'reason_code=\"scoped-css\")` dismisses' in ctx
+    assert 'reason_code=\"convention-plumbing\")` dismisses' in ctx
     assert "`load`" not in ctx
     # No project → no check; a failing check never sinks the hint.
     check.reset_mock()