You are a constitutional council ranking individual git commits for ownership allocation.

Compare these two commits. Decide which contributed more lasting value to the project.

Judge substance, not spectacle:
- Prefer correct, lasting design and real bugfixes over churn, formatting, renames, or generated noise.
- Prefer clarity and necessity over sheer line count. A small precise change can beat a large diffuse one.
- Do not favor a side merely because its patch is longer or noisier.
- Weight what the change does for the project, not the contributor's name.

Return ONLY a JSON object: {"winner": "A" or "B", "ratio": "N:M", "explanation": "..."}
The explanation must cite concrete differences in the patches (1-3 sentences).

Side A — contributor: tommy-mor
Side A — commit message:
[65bce99f] sibling groups #130

Side A — unified diff (full patch):
diff --git a/server/src/html/garden.rs b/server/src/html/garden.rs
index 82c1b4b4f36ea13a906035a1789ba893222b3695..e3c56d124ab7b0fa08c7f9ae736103e6b7cf5862 100644
--- a/server/src/html/garden.rs
+++ b/server/src/html/garden.rs
@@ -837,7 +837,8 @@ struct SiblingNavGroup {
     links: Vec<SiblingNavLink>,
 }
 
-/// Siblings under the same parent, grouped like child rankings (components then isolates).
+/// Siblings under the same parent: one group per ranking component (ordered list), then one
+/// group per isolated unranked sibling (each shows rank `1`, separated like components).
 #[derive(Debug, Clone)]
 struct SiblingNavBar {
     groups: Vec<SiblingNavGroup>,
@@ -890,15 +891,12 @@ fn build_sibling_nav(
             groups.push(SiblingNavGroup { links });
         }
     }
-    if !rankings.unranked_items.is_empty() {
-        let links: Vec<SiblingNavLink> = rankings
-            .unranked_items
-            .iter()
-            .map(|u| SiblingNavLink {
+    for u in &rankings.unranked_items {
+        groups.push(SiblingNavGroup {
+            links: vec![SiblingNavLink {
                 path: u.clone().normalized_storage().to_storage_string(),
-            })
-            .collect();
-        groups.push(SiblingNavGroup { links });
+            }],
+        });
     }
     let sibling_total: usize = groups.iter().map(|g| g.links.len()).sum();
     if sibling_total <= 1 {
@@ -1541,6 +1539,29 @@ mod tests {
         assert_eq!(nav.groups[1].links.len(), 1);
     }
 
+    #[test]
+    fn sibling_nav_splits_each_unranked_into_its_own_group() {
+        let mut reduced = ReducerState::default();
+        apply_ingest(
+            &mut reduced,
+            1,
+            "@00000000-0000-0000-0000-000000000000:test:local/test\n\
+             ~/topic {topic body}\n\
+             ~/topic/a {alpha}\n\
+             ~/topic/b {beta}\n\
+             ~/topic/c {gamma}\n\
+             ~/topic/d {delta}\n\
+             {a beats b}\n             ~/topic/a 2:1 ~/topic/b\n",
+        );
+
+        let model = build_item_page_view_model(&reduced, &ScopeId::Public, "~/topic/a");
+        let nav = model.sibling_nav.expect("expected sibling nav");
+        assert_eq!(nav.groups.len(), 3);
+        assert_eq!(nav.groups[0].links.len(), 2);
+        assert_eq!(nav.groups[1].links.len(), 1);
+        assert_eq!(nav.groups[2].links.len(), 1);
+    }
+
     #[test]
     fn item_page_model_builds_ranked_child_components() {
         let mut reduced = ReducerState::default();


Side B — contributor: tommy-mor
Side B — commit message:
[047b82bd] Remove redundant zero-ratio guard from reducer.

Zeros are already rejected at the DSL parser and browser handler;
the guard in apply_vote was dead code. The negative clamping stays
since add_edge_weight already skips weight-0 edges correctly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Side B — unified diff (full patch):
diff --git a/server/src/reducer.rs b/server/src/reducer.rs
index 0e36979abe0f051493038ff7e652efc7f7a0ac80..efbf7f67ff24c7a2989102fe62879b2794a27c5f 100644
--- a/server/src/reducer.rs
+++ b/server/src/reducer.rs
@@ -112,11 +112,6 @@ impl GroupState {
         if vote.ratio_right < 0 {
             vote.ratio_right = 0;
         }
-        if vote.ratio_left == 0 || vote.ratio_right == 0 {
-            // Zero on either side produces no valid edge; drop before registering items or pair.
-            return;
-        }
-
         let a_idx = self.ensure_item(&vote.a);
         let b_idx = self.ensure_item(&vote.b);
 
diff --git a/server/tests/basic.rs b/server/tests/basic.rs
index 08159f4a7f0850fd165817a4a1af4f31ced2ad76..1748769ccf7196b2d81cf556d5368c7e723f6a4e 100644
--- a/server/tests/basic.rs
+++ b/server/tests/basic.rs
@@ -533,7 +533,7 @@ fn dsl_parse_rejects_zero_zero_vote_ratio() {
 #[test]
 fn reducer_negative_ratio_clamped_to_zero() {
     let _state = ReducerState::default();
-    // GroupState::apply_vote clamps negatives to 0; when either side is 0 the vote is dropped.
+    // apply_vote clamps negatives to 0; add_edge_weight skips zero-weight edges.
     let mut group = GroupState::new();
     group.apply_vote(slugsocial_server::reducer::VoteData {
         ts: 1,
@@ -546,10 +546,9 @@ fn reducer_negative_ratio_clamped_to_zero() {
         delegate: Some("00000000-0000-0000-0000-000000000000:test:local/test".to_string()),
         thread_tag: "t".to_string(),
     });
-    // Nothing registered: zero-clamped vote is dropped before ensure_item.
-    assert!(group.idx_to_item.is_empty());
+    // Items and pair are registered; edges are absent because weight 0 is skipped.
+    assert_eq!(group.idx_to_item.len(), 2);
     assert!(group.edges.is_empty());
-    assert!(group.voted_pairs.is_empty());
 }