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>

src/scribe/services/coverage.py

@@ -198,11 +198,13 @@ def extract_definitions(text: str) -> list[Definition]:
                 break
         block = lines[i:end]
         # A CSS rule's fingerprint is its DECLARATIONS, not its selector
-        # (#2872): the row's identity already carries the selector, and the
-        # question the fingerprint answers for derive grouping is "is this the
-        # same rule under another name?" — .closed-msg / .error-block /
-        # .success-msg with identical bodies are one dup group, not three
-        # lonely rows. Sym blocks keep their signature line in the hash.
+        # (#2872): the row's identity already carries the selector. Since
+        # note 2917 the derive grouping no longer reads CSS bodies at all (a
+        # class is grouped by name only), so for CSS the fingerprint is the
+        # recheck identity — "did this rule's body change since it was
+        # judged?" — and nothing more. The shape of the hash is kept as-is on
+        # purpose: changing it would flip every judged CSS row to recheck on
+        # the next sync. Sym blocks keep their signature line in the hash.
         if kind == "css":
             # One-line rules (`.x { color: red; }`) carry their declarations on
             # the selector line itself; a block that is only the selector plus
@@ -217,10 +219,9 @@ def extract_definitions(text: str) -> list[Definition]:
             # A SINGLE declaration is not a shape (#2903): `color: var(--fs-
             # text-tertiary)` under .text-muted, .task-mark and .pin-badge-auto
             # is three meanings sharing one line, not three copies of one
-            # rule — the first pay-down found 5-file "families" of exactly
-            # this and nobody would consolidate them. Keep the selector in the
-            # hash for one-liners, so they group only with same-name copies;
-            # two declarations and up stay selector-agnostic.
+            # rule. Keep the selector in the hash for one-liners; two
+            # declarations and up stay selector-agnostic. (Moot for grouping
+            # since note 2917, kept for fingerprint stability — see above.)
             elif _declaration_count(hashed) < 2:
                 hashed = block
         else: