You are ranking individual git commits to an open source project.
Compare these two commits. Decide which commit contributed more.
Return ONLY a JSON object: {"winner": "A" or "B", "ratio": "N:M", "explanation": "..."}

Side A — contributor: tommy-mor
Side A — commit message:
[0366806e] Color rank rows by vote mass within each group, not list position.

Min–max normalization keeps similar scores visually close while still
using the full gradient as groups grow and absolute mass dilutes.

Co-authored-by: Cursor <cursoragent@cursor.com>

Side A — unified diff (full patch):
diff --git a/server/src/html/mod.rs b/server/src/html/mod.rs
index a58cbbee3490a08a625cb06df06848c59a615d65..4eff2e19ed4d303ff8e80c1eabd8a15b4990e643 100644
--- a/server/src/html/mod.rs
+++ b/server/src/html/mod.rs
@@ -264,12 +264,19 @@ pub fn scope_theme_style(parent: &ItemId) -> String {
     )
 }
 
-fn rank_row_style(parent: &ItemId, ordinal: usize, total: usize) -> String {
-    let t = if total <= 1 {
-        0.0
-    } else {
-        ordinal as f64 / (total - 1) as f64
-    };
+/// Map vote mass to gradient position using the group's score range, not raw mass or
+/// list position. Vote mass sums to 1 across the component, so absolute values dilute
+/// as N grows; min–max within the visible list preserves similar scores → similar colors.
+fn score_gradient_t(score: f64, min_score: f64, max_score: f64) -> f64 {
+    let spread = max_score - min_score;
+    if spread < 1e-9 {
+        return 0.5;
+    }
+    ((max_score - score) / spread).clamp(0.0, 1.0)
+}
+
+fn rank_row_style(parent: &ItemId, score: f64, min_score: f64, max_score: f64) -> String {
+    let t = score_gradient_t(score, min_score, max_score);
     let base_hue = scope_base_hue(parent);
     let hue = (base_hue + 118.0 * t) % 360.0;
     let lightness = 0.74 - 0.34 * t;
@@ -295,14 +302,15 @@ fn rank_list(
     highlighted: &HashSet<ItemId>,
     tree: &GlobalTree,
 ) -> Markup {
-    let group_len = items.len();
+    let min_score = items.iter().map(|r| r.score).fold(f64::INFINITY, f64::min);
+    let max_score = items.iter().map(|r| r.score).fold(f64::NEG_INFINITY, f64::max);
     html! {
         @if !items.is_empty() {
             h3 class="rank-heading muted small" { (label) }
             ol class="rank-list" {
                 @for (i, r) in items.iter().enumerate() {
                     @let href = item_href(&r.item);
-                    @let style = rank_row_style(parent, i, group_len);
+                    @let style = rank_row_style(parent, r.score, min_score, max_score);
                     @let class = rank_row_class(&r.item, highlighted);
                     li class=(class)
                         data-rank-item=(r.item.as_str())
@@ -517,19 +525,37 @@ pub async fn browse(State(state): State<AppState>, uri: Uri) -> impl IntoRespons
 
 #[cfg(test)]
 mod tests {
-    use super::{rank_row_style, SORTER_UI_JS};
+    use super::{rank_row_style, score_gradient_t, SORTER_UI_JS};
     use crate::path_types::ItemId;
 
     #[test]
-    fn rank_row_style_gradients_per_group_not_globally() {
+    fn score_gradient_t_uses_group_range_not_absolute_mass() {
+        assert!((score_gradient_t(0.12, 0.08, 0.12) - 0.0).abs() < 1e-9);
+        assert!((score_gradient_t(0.08, 0.08, 0.12) - 1.0).abs() < 1e-9);
+        // Raw 12% mass would map near the dark end globally; within this group it's the top.
+        assert!(score_gradient_t(0.12, 0.08, 0.12) < score_gradient_t(0.12, 0.0, 1.0));
+    }
+
+    #[test]
+    fn score_gradient_t_similar_scores_similar_t() {
+        let a = score_gradient_t(0.41, 0.20, 0.60);
+        let b = score_gradient_t(0.40, 0.20, 0.60);
+        assert!((a - b).abs() < 0.05);
+        assert!((a - score_gradient_t(0.60, 0.20, 0.60)).abs() > 0.3);
+    }
+
+    #[test]
+    fn score_gradient_t_tied_scores_neutral() {
+        assert!((score_gradient_t(0.25, 0.25, 0.25) - 0.5).abs() < 1e-9);
+    }
+
+    #[test]
+    fn rank_row_style_same_inputs_same_color() {
         let parent = ItemId::opaque("test-scope");
-        let first_in_four = rank_row_style(&parent, 0, 4);
-        let last_in_four = rank_row_style(&parent, 3, 4);
-        let first_in_two = rank_row_style(&parent, 0, 2);
-        let last_in_two = rank_row_style(&parent, 1, 2);
-        assert_eq!(first_in_four, first_in_two);
-        assert_eq!(last_in_four, last_in_two);
-        assert_ne!(first_in_four, last_in_four);
+        assert_eq!(
+            rank_row_style(&parent, 0.33, 0.20, 0.60),
+            rank_row_style(&parent, 0.33, 0.20, 0.60),
+        );
     }
 
     #[test]


Side B — contributor: tommy-mor
Side B — commit message:
[03cd8f2e] Skip pinned Reddit posts when importing subreddit listings.

Co-authored-by: Cursor <cursoragent@cursor.com>

Side B — unified diff (full patch):
diff --git a/server/src/reddit.rs b/server/src/reddit.rs
index f409764c1e1f36216f1b08107043c2eab905694c..fa5577f8ee0a8c53ff4dbec988a90a5d2fc3cdee 100644
--- a/server/src/reddit.rs
+++ b/server/src/reddit.rs
@@ -661,6 +661,7 @@ pub fn map_children_url(id: &ItemId, api_base: &str) -> String {
 /// Parse a subreddit listing payload into `(child_id, child_payload)` entries.
 /// Each child id is the post's permalink under `reddit.com/…`, and the payload
 /// is the raw `{kind, data}` listing element (persisted per child).
+/// Pinned / stickied posts are skipped.
 fn parse_children(_parent: &ItemId, payload: &Value) -> Vec<(ItemId, Value)> {
     let mut out = Vec::new();
     let children = match payload.pointer("/data/children").and_then(|c| c.as_array()) {
@@ -668,6 +669,9 @@ fn parse_children(_parent: &ItemId, payload: &Value) -> Vec<(ItemId, Value)> {
         None => return out,
     };
     for child in children {
+        if child_is_pinned(child) {
+            continue;
+        }
         let permalink = match child.pointer("/data/permalink").and_then(|p| p.as_str()) {
             Some(p) if !p.is_empty() => p,
             _ => continue,
@@ -680,6 +684,15 @@ fn parse_children(_parent: &ItemId, payload: &Value) -> Vec<(ItemId, Value)> {
     out
 }
 
+fn child_is_pinned(child: &Value) -> bool {
+    let data = match child.get("data") {
+        Some(d) => d,
+        None => return false,
+    };
+    data.get("stickied").and_then(|v| v.as_bool()) == Some(true)
+        || data.get("pinned").and_then(|v| v.as_bool()) == Some(true)
+}
+
 fn parse_reddit_view(id: &ItemId, v: &Value) -> Option<crate::reducer::EntityData> {
     let segments: Vec<&str> = id.as_str().split('/').collect();
 
@@ -853,4 +866,46 @@ mod tests {
             Some("http://v3.redgifs.com/watch/impossibleprestigioushedgehog")
         );
     }
+
+    #[test]
+    fn parse_children_skips_pinned_posts() {
+        let payload = serde_json::json!({
+            "kind": "Listing",
+            "data": {
+                "children": [
+                    {
+                        "kind": "t3",
+                        "data": {
+                            "title": "Official rules (pinned)",
+                            "permalink": "/r/rust/comments/pin/official_rules/",
+                            "stickied": true
+                        }
+                    },
+                    {
+                        "kind": "t3",
+                        "data": {
+                            "title": "Also pinned via pinned field",
+                            "permalink": "/r/rust/comments/pin2/also_pinned/",
+                            "pinned": true
+                        }
+                    },
+                    {
+                        "kind": "t3",
+                        "data": {
+                            "title": "Normal post",
+                            "permalink": "/r/rust/comments/aaa/normal_post/",
+                            "stickied": false
+                        }
+                    }
+                ]
+            }
+        });
+        let parent = ItemId::from_url("https://reddit.com/r/rust").unwrap();
+        let children = parse_children(&parent, &payload);
+        assert_eq!(children.len(), 1);
+        assert_eq!(
+            children[0].0.as_str(),
+            "https://reddit.com/r/rust/comments/aaa"
+        );
+    }
 }