{"messages":[{"content":"You are a constitutional council ranking individual git commits for ownership allocation.\n\nCompare these two commits. Decide which contributed more lasting value to the project.\n\nJudge substance, not spectacle:\n- Prefer correct, lasting design and real bugfixes over churn, formatting, renames, or generated noise.\n- Prefer clarity and necessity over sheer line count. A small precise change can beat a large diffuse one.\n- Do not favor a side merely because its patch is longer or noisier.\n- Weight what the change does for the project, not the contributor's name.\n\nReturn ONLY a JSON object: {\"winner\": \"A\" or \"B\", \"ratio\": \"N:M\", \"explanation\": \"...\"}\nThe explanation must cite concrete differences in the patches (1-3 sentences).\n\nSide A — contributor: tommy-mor\nSide A — commit message:\n[1531154d] dequeue -> vec\n\nSide A — unified diff (full patch):\ndiff --git a/server/src/projection_apply.rs b/server/src/projection_apply.rs\nindex 9c8990a8af927f35d3344c8d0872a516aba56b86..ad404bacb8bcdd5ae0e682cff97f974fd44528ea 100644\n--- a/server/src/projection_apply.rs\n+++ b/server/src/projection_apply.rs\n@@ -6,8 +6,6 @@\n //! batch as the (non-idempotent) edge merges guarantees exactly-once application\n //! across replay.\n \n-use std::collections::BTreeSet;\n-\n use crate::{\n     event_log::EventLogError,\n     events::{Event, EventRecord},\n@@ -44,7 +42,6 @@ pub fn apply_records(\n \n     let db = projection_store.db();\n     let mut batch = db.batch();\n-    let mut vote_parents: BTreeSet<ItemId> = BTreeSet::new();\n     let mut last_seq = 0u64;\n \n     for record in records {\n@@ -70,7 +67,6 @@ pub fn apply_records(\n                     *ts,\n                 )\n                 .map_err(|e| EventLogError::Apply(e.to_string()))?;\n-                vote_parents.insert(parent);\n             }\n             Event::NodeEnsured { id } => {\n                 let parsed = parse_event_id(id)?;\n@@ -85,11 +81,5 @@ pub fn apply_records(\n         .commit_with(durable::Durability::DisableWal)\n         .map_err(|e| EventLogError::Apply(e.to_string()))?;\n \n-    for parent in vote_parents {\n-        projection_store\n-            .trim_recent_votes(&parent)\n-            .map_err(|e| EventLogError::Apply(e.to_string()))?;\n-    }\n-\n     Ok(())\n }\ndiff --git a/server/src/projection_store.rs b/server/src/projection_store.rs\nindex 8576d671f351004426207894ac35594ddb0f70cf..9a8953d010029d3639dc3987687554bab8b7663e 100644\n--- a/server/src/projection_store.rs\n+++ b/server/src/projection_store.rs\n@@ -18,7 +18,7 @@ use crate::{\n \n const PROJECTION_CURSOR_KEY: &str = \"cursor\";\n const PROJECTION_SCHEMA_KEY: &str = \"schema_version\";\n-const PROJECTION_SCHEMA_VERSION: u64 = 3;\n+const PROJECTION_SCHEMA_VERSION: u64 = 4;\n \n #[derive(Debug, thiserror::Error)]\n pub enum ProjectionStoreError {\n@@ -142,16 +142,6 @@ impl ProjectionStore {\n         Ok(tree)\n     }\n \n-    /// Cap a node's recent-vote window after applying votes (best-effort, blind).\n-    pub(crate) fn trim_recent_votes(&self, parent: &ItemId) -> Result<(), ProjectionStoreError> {\n-        node(parent).recent_votes().truncate_back(\n-            &self.db,\n-            crate::storage_schema::RECENT_VOTES_CAP,\n-            Durability::DisableWal,\n-        )?;\n-        Ok(())\n-    }\n-\n     /// Cache Reddit display content outside the event log (must be evicted per policy).\n     pub fn put_ephemeral_content(\n         &self,\ndiff --git a/server/src/reducer.rs b/server/src/reducer.rs\nindex 0c75c85150bb9e5f578bbadf58b3e43f8a80be4b..759918b8c0eb8f8bf1ed0911d8877adaa55c8ea6 100644\n--- a/server/src/reducer.rs\n+++ b/server/src/reducer.rs\n@@ -1,4 +1,4 @@\n-use std::collections::{HashMap, HashSet, VecDeque};\n+use std::collections::{HashMap, HashSet};\n \n use serde::{Deserialize, Serialize};\n \n@@ -52,7 +52,7 @@ pub struct GroupState {\n     pub idx_to_item: Vec<ItemId>,\n     pub edges: HashMap<(usize, usize), f64>,\n     pub voted_pairs: HashSet<(usize, usize)>,\n-    pub recent_votes: VecDeque<VoteData>,\n+    pub recent_votes: Vec<VoteData>,\n }\n \n impl GroupState {\n@@ -62,7 +62,7 @@ impl GroupState {\n             idx_to_item: Vec::new(),\n             edges: HashMap::new(),\n             voted_pairs: HashSet::new(),\n-            recent_votes: VecDeque::with_capacity(200),\n+            recent_votes: Vec::new(),\n         }\n     }\n \n@@ -111,10 +111,7 @@ impl GroupState {\n         self.add_edge_weight(b_idx, a_idx, w_a);\n         self.add_edge_weight(a_idx, b_idx, w_b);\n \n-        self.recent_votes.push_front(vote);\n-        while self.recent_votes.len() > 200 {\n-            self.recent_votes.pop_back();\n-        }\n+        self.recent_votes.push(vote);\n     }\n }\n \ndiff --git a/server/src/storage_dto.rs b/server/src/storage_dto.rs\nindex 9dfb13c53efe4389277625a6ab3bfc18f566a453..3fd6db5cb909ac4896bd8a3ecace796de5f08781 100644\n--- a/server/src/storage_dto.rs\n+++ b/server/src/storage_dto.rs\n@@ -39,7 +39,7 @@ pub struct StoredEntityDataV1 {\n     pub link_url: Option<String>,\n }\n \n-/// One vote stored in a node's `recent_votes` deque.\n+/// One vote stored in a node's `recent_votes` list.\n #[derive(Debug, Clone, Serialize, Deserialize)]\n pub struct StoredVoteV1 {\n     pub version: u32,\ndiff --git a/server/src/storage_schema.rs b/server/src/storage_schema.rs\nindex bd26e665e084b95b10fdfff091c31e8dc84d07b8..5d2bb1d56927fb61c7c6d2d8602bd6882327f862 100644\n--- a/server/src/storage_schema.rs\n+++ b/server/src/storage_schema.rs\n@@ -2,13 +2,13 @@\n //! durable collections instead of one blob per node.\n //!\n //! A vote updates a handful of keys: a few edge-weight merges, a voted-pair flag,\n-//! a recent-vote deque push, and child-link set entries. The in-memory\n+//! a recent-vote list append, and child-link set entries. The in-memory\n //! [`crate::reducer::GroupState`] is reconstructed from these keys on read for\n //! rank-centrality.\n \n use std::collections::{BTreeSet, HashMap, HashSet};\n \n-use durable::{Batch, Db, Deque, Durable, Leaf, Map, Sum};\n+use durable::{Batch, Db, Durable, Leaf, List, Map, Sum};\n \n use crate::{\n     path_types::ItemId,\n@@ -38,8 +38,8 @@ pub struct NodeSchema {\n     pub edges: Map<EdgeKey, Sum<f64>>,\n     /// Voted pairs `(min, max) -> true`.\n     pub voted_pairs: Map<PairKey, Leaf<bool>>,\n-    /// Recent votes, newest at the front (capped on write).\n-    pub recent_votes: Deque<Leaf<StoredVoteV1>>,\n+    /// Recent votes, append-only oldest-first (cap applied on read).\n+    pub recent_votes: List<Leaf<StoredVoteV1>>,\n     /// When ephemeral Reddit display content was last fetched (ms); absent after eviction.\n     pub fetched_at: Leaf<i64>,\n }\n@@ -55,7 +55,7 @@ pub struct Store {\n     pub view_meta: Map<String, Leaf<u64>>,\n }\n \n-/// Cap on the per-node recent-vote window (matches the in-memory reducer).\n+/// Max recent votes returned when loading a node (query-time cap only).\n pub const RECENT_VOTES_CAP: u64 = 200;\n \n fn id_key(id: &ItemId) -> String {\n@@ -148,11 +148,14 @@ fn build_group_state(\n         }\n     }\n \n-    // Deque is front=newest; in-memory VecDeque is also front=newest.\n-    let mut recent_votes = std::collections::VecDeque::new();\n-    for stored in np.recent_votes().iter(db)? {\n-        recent_votes.push_back(decode_vote(stored).map_err(durable::Error::Deserialize)?);\n-    }\n+    // List is index order (oldest first); keep the newest RECENT_VOTES_CAP entries.\n+    let stored = np.recent_votes().iter(db)?;\n+    let cap = RECENT_VOTES_CAP as usize;\n+    let start = stored.len().saturating_sub(cap);\n+    let recent_votes = stored[start..]\n+        .iter()\n+        .map(|s| decode_vote(s.clone()).map_err(durable::Error::Deserialize))\n+        .collect::<Result<Vec<_>, _>>()?;\n \n     Ok(GroupState {\n         item_to_idx,\n@@ -248,7 +251,7 @@ pub fn vote_writes(\n     };\n     batch.write(pnode.voted_pairs().key(&(lo, hi)).set(&true));\n \n-    // Recent votes (newest at front).\n+    // Recent votes (append-only; cap on read).\n     let stored = encode_vote(&VoteData {\n         ts,\n         a: a_id,\n@@ -260,7 +263,7 @@ pub fn vote_writes(\n         delegate: None,\n         thread_tag: \"default\".to_string(),\n     });\n-    batch.push_front(&pnode.recent_votes(), &stored)?;\n+    batch.push(&pnode.recent_votes(), &stored)?;\n     Ok(())\n }\n \n@@ -314,6 +317,35 @@ mod tests {\n         assert!(load_node_state(&db, &parent).unwrap().is_none());\n     }\n \n+    #[test]\n+    fn load_caps_recent_votes_at_query_time() {\n+        let dir = tempfile::tempdir().unwrap();\n+        let db = Db::open(dir.path()).unwrap();\n+        let parent = ItemId::root();\n+\n+        let mut batch = db.batch();\n+        for i in 0..RECENT_VOTES_CAP + 10 {\n+            vote_writes(&mut batch, &parent, \"alpha\", \"beta\", 1, 0, i as i64).unwrap();\n+        }\n+        batch.commit().unwrap();\n+\n+        assert_eq!(\n+            node(&parent).recent_votes().len(&db).unwrap(),\n+            RECENT_VOTES_CAP + 10\n+        );\n+\n+        let node_state = load_node_state(&db, &parent).unwrap().unwrap();\n+        assert_eq!(node_state.local_ranking.recent_votes.len(), RECENT_VOTES_CAP as usize);\n+        assert_eq!(\n+            node_state.local_ranking.recent_votes.first().map(|v| v.ts),\n+            Some(10)\n+        );\n+        assert_eq!(\n+            node_state.local_ranking.recent_votes.last().map(|v| v.ts),\n+            Some(RECENT_VOTES_CAP as i64 + 9)\n+        );\n+    }\n+\n     #[test]\n     fn missing_node_is_none() {\n         let dir = tempfile::tempdir().unwrap();\n\n\nSide B — contributor: tommy-mor\nSide B — commit message:\n[7964b28f] fix\n\nSide B — unified diff (full patch):\ndiff --git a/Cargo.lock b/Cargo.lock\nindex 8c43fb75c472b102e6e1d3b837dce3355be898f2..e55d87f32ab32064686431c7082ef8c9ca872d63 100644\n--- a/Cargo.lock\n+++ b/Cargo.lock\n@@ -923,6 +923,15 @@ version = \"0.2.0\"\n source = \"registry+https://github.com/rust-lang/crates.io-index\"\n checksum = \"439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391\"\n \n+[[package]]\n+name = \"ppv-lite86\"\n+version = \"0.2.21\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"85eae3c4ed2f50dcfe72643da4befc30deadb458a9b590d720cde2f2b1e97da9\"\n+dependencies = [\n+ \"zerocopy\",\n+]\n+\n [[package]]\n name = \"prettyplease\"\n version = \"0.2.37\"\n@@ -980,6 +989,36 @@ version = \"6.0.0\"\n source = \"registry+https://github.com/rust-lang/crates.io-index\"\n checksum = \"f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf\"\n \n+[[package]]\n+name = \"rand\"\n+version = \"0.8.6\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"5ca0ecfa931c29007047d1bc58e623ab12e5590e8c7cc53200d5202b69266d8a\"\n+dependencies = [\n+ \"libc\",\n+ \"rand_chacha\",\n+ \"rand_core\",\n+]\n+\n+[[package]]\n+name = \"rand_chacha\"\n+version = \"0.3.1\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88\"\n+dependencies = [\n+ \"ppv-lite86\",\n+ \"rand_core\",\n+]\n+\n+[[package]]\n+name = \"rand_core\"\n+version = \"0.6.4\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c\"\n+dependencies = [\n+ \"getrandom 0.2.17\",\n+]\n+\n [[package]]\n name = \"regex-automata\"\n version = \"0.4.14\"\n@@ -1270,6 +1309,7 @@ dependencies = [\n  \"dotenvy\",\n  \"futures-util\",\n  \"maud\",\n+ \"rand\",\n  \"reqwest\",\n  \"serde\",\n  \"serde_json\",\n@@ -1280,6 +1320,7 @@ dependencies = [\n  \"tower-http 0.5.2\",\n  \"tracing\",\n  \"tracing-subscriber\",\n+ \"urlencoding\",\n ]\n \n [[package]]\n@@ -1656,6 +1697,12 @@ dependencies = [\n  \"serde\",\n ]\n \n+[[package]]\n+name = \"urlencoding\"\n+version = \"2.1.3\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"daf8dba3b7eb870caf1ddeed7bc9d2a049f3cfdfae7cb521b087cc33ae4c49da\"\n+\n [[package]]\n name = \"utf8_iter\"\n version = \"1.0.4\"\n@@ -2052,6 +2099,26 @@ dependencies = [\n  \"synstructure\",\n ]\n \n+[[package]]\n+name = \"zerocopy\"\n+version = \"0.8.50\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"3b065d4f0e55f82fae73202e189638116a87c55ab6b8e6c2721e13dd9d854ad1\"\n+dependencies = [\n+ \"zerocopy-derive\",\n+]\n+\n+[[package]]\n+name = \"zerocopy-derive\"\n+version = \"0.8.50\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"0b631b19d36a892ab55420c92dbc83ccd79274f25be714855d3074aa71cab639\"\n+dependencies = [\n+ \"proc-macro2\",\n+ \"quote\",\n+ \"syn\",\n+]\n+\n [[package]]\n name = \"zerofrom\"\n version = \"0.1.8\"\ndiff --git a/server/Cargo.toml b/server/Cargo.toml\nindex c940acb687fb141d21760a3d6656172013cf6f41..6fb7bf52fa58f46f5e8fb0f7fd395247b57506d7 100644\n--- a/server/Cargo.toml\n+++ b/server/Cargo.toml\n@@ -20,6 +20,8 @@ reqwest = { version = \"0.12\", features = [\"json\"] }\n dotenvy = \"0.15\"\n async-stream = \"0.3\"\n futures-util = { version = \"0.3\", default-features = false, features = [\"std\"] }\n+rand = \"0.8\"\n+urlencoding = \"2\"\n \n [dev-dependencies]\n reqwest = { version = \"0.12\", features = [\"json\"] }\ndiff --git a/server/src/api/ui_html.rs b/server/src/api/ui_html.rs\nindex e649a7d192feade465e19ce6187a829f6ec74372..06001212820101e0cc953d3687dea64f85e60787 100644\n--- a/server/src/api/ui_html.rs\n+++ b/server/src/api/ui_html.rs\n@@ -47,6 +47,7 @@ pub async fn post_ui_html(\n             ratio_left,\n             ratio_right,\n             scope,\n+            next,\n         } => {\n             let parent = parent_from_scope(&scope);\n             if let Err(e) = state\n@@ -56,9 +57,19 @@ pub async fn post_ui_html(\n                 return ui_js_warn(&e).into_response();\n             }\n             let tree = state.tree.read().await;\n+            if !next.trim().is_empty() {\n+                drop(tree);\n+                return JsBuilder::new()\n+                    .raw(&format!(\n+                        \"window.location.href={};\",\n+                        js_string_literal(next.trim())\n+                    ))\n+                    .into_response();\n+            }\n             let empty = crate::reducer::NodeState::default();\n             let node = tree.get(&parent).unwrap_or(&empty);\n             let panel = ranking_panel(&parent, node, &tree);\n+            drop(tree);\n             JsBuilder::new()\n                 .morph_selector(\"#ranking-panel\", panel)\n                 .into_response()\n@@ -126,6 +137,7 @@ mod tests {\n                 ratio_left: 3,\n                 ratio_right: 1,\n                 scope: String::new(),\n+                next: String::new(),\n             }\n         );\n     }\ndiff --git a/server/src/form_template.rs b/server/src/form_template.rs\nindex b9bc3982a125e94e67c99175ea9055979541abba..bd4a7195a6eaabfed55333bab5640708ea108b81 100644\n--- a/server/src/form_template.rs\n+++ b/server/src/form_template.rs\n@@ -7,19 +7,30 @@ pub fn template_json_compact<T: Serialize>(v: &T) -> serde_json::Result<String>\n     serde_json::to_string(v)\n }\n \n-/// Recursively walk the JSON AST and replace `{\"$form\": \"key\"}` with the submitted\n-/// string for `key` (empty if missing). Other keys are unchanged.\n+/// Recursively walk the JSON AST and replace form holes with submitted values.\n+///\n+/// - `{\"$form\": \"key\"}` → string (empty if missing)\n+/// - `{\"$form:i32\": \"key\"}` → JSON number (0 if missing or unparseable)\n pub fn substitute_form_vars(val: &mut Value, form_data: &HashMap<String, String>) {\n     match val {\n         Value::Object(map) => {\n             if map.len() == 1 {\n-                if let Some(Value::String(field_name)) = map.get(\"$form\") {\n-                    let submitted = form_data\n-                        .get(field_name.as_str())\n-                        .map(|s| s.as_str())\n-                        .unwrap_or(\"\");\n-                    *val = Value::String(submitted.to_string());\n-                    return;\n+                if let Some((hole_key, Value::String(field_name))) = map.iter().next() {\n+                    if let Some(form_type) = hole_key.strip_prefix(\"$form\") {\n+                        let submitted = form_data\n+                            .get(field_name.as_str())\n+                            .map(|s| s.as_str())\n+                            .unwrap_or(\"\");\n+                        *val = match form_type {\n+                            \"\" => Value::String(submitted.to_string()),\n+                            \":i32\" => {\n+                                let n: i32 = submitted.trim().parse().unwrap_or(0);\n+                                Value::Number(n.into())\n+                            }\n+                            _ => Value::String(submitted.to_string()),\n+                        };\n+                        return;\n+                    }\n                 }\n             }\n             for v in map.values_mut() {\n@@ -62,6 +73,45 @@ mod tests {\n         text: String,\n     }\n \n+    #[test]\n+    fn i32_holes_become_numbers() {\n+        let json = r#\"{\n+            \"ratio_left\": {\"$form:i32\": \"ratio_left\"},\n+            \"ratio_right\": {\"$form:i32\": \"ratio_right\"}\n+        }\"#;\n+        let mut form = HashMap::new();\n+        form.insert(\"ratio_left\".into(), \"75\".into());\n+        form.insert(\"ratio_right\".into(), \"25\".into());\n+        let v = fill_template_from_form(json, &form).unwrap();\n+        assert_eq!(v[\"ratio_left\"], 75);\n+        assert_eq!(v[\"ratio_right\"], 25);\n+\n+        #[derive(Debug, Deserialize, PartialEq, Eq)]\n+        struct Ratios {\n+            ratio_left: i32,\n+            ratio_right: i32,\n+        }\n+        let r: Ratios = serde_json::from_value(v).unwrap();\n+        assert_eq!(\n+            r,\n+            Ratios {\n+                ratio_left: 75,\n+                ratio_right: 25,\n+            }\n+        );\n+    }\n+\n+    #[test]\n+    fn i32_hole_missing_or_bad_defaults_to_zero() {\n+        let json = r#\"{\"n\": {\"$form:i32\": \"missing\"}}\"#;\n+        let v = fill_template_from_form(json, &HashMap::new()).unwrap();\n+        assert_eq!(v[\"n\"], 0);\n+        let mut form = HashMap::new();\n+        form.insert(\"missing\".into(), \"nope\".into());\n+        let v = fill_template_from_form(json, &form).unwrap();\n+        assert_eq!(v[\"n\"], 0);\n+    }\n+\n     #[test]\n     fn holes_become_strings() {\n         let json = r#\"{\ndiff --git a/server/src/html/mod.rs b/server/src/html/mod.rs\nindex 3bf9fc7e92e50beed24e2c25106a77421038c90b..61cdbc094819ddedb755572c59456ec0d6617619 100644\n--- a/server/src/html/mod.rs\n+++ b/server/src/html/mod.rs\n@@ -20,6 +20,8 @@ use crate::{\n     ui_action::UI_RPC_FIELD,\n };\n \n+pub mod vote;\n+\n const SORTER_CSS: &str = include_str!(\"../../static/sorter.css\");\n const SORTER_UI_JS: &str = include_str!(\"../../static/sorter_ui.js\");\n \n@@ -131,7 +133,7 @@ fn layout(title: &str, body: Markup, views: u64) -> Markup {\n     }\n }\n \n-fn item_href(id: &ItemId) -> String {\n+pub(crate) fn item_href(id: &ItemId) -> String {\n     id.browse_href()\n }\n \n@@ -309,11 +311,23 @@ async fn item_page(state: AppState, uri: Uri, item: ItemId) -> Markup {\n     let empty_node = NodeState::default();\n     let node = tree.get(&item).unwrap_or(&empty_node);\n \n+    let child_count = node.children.len();\n+    let vote_link = if child_count >= 2 {\n+        Some(vote::vote_href(&item))\n+    } else {\n+        None\n+    };\n+\n     let body = html! {\n         h1 { \"sorter\" }\n         (input_panel(\"\", None))\n         (breadcrumb_path(&item))\n         (entity_section(&item, node, false))\n+        @if let Some(href) = vote_link {\n+            p class=\"vote-cta\" {\n+                a class=\"btn-primary\" href=(href) data-testid=\"vote-children\" { \"Vote on children\" }\n+            }\n+        }\n         (ranking_panel(&item, node, &tree))\n     };\n     layout(\"sorter2\", body, views)\ndiff --git a/server/src/lib.rs b/server/src/lib.rs\nindex da5f3ebecec1794b05a2a69cc78379551b2ad769..7f7e28c8ac3758de87f1f8e073b24be4132d38da 100644\n--- a/server/src/lib.rs\n+++ b/server/src/lib.rs\n@@ -4,6 +4,7 @@ pub mod events;\n pub mod fetch;\n pub mod form_template;\n pub mod html;\n+pub mod pair;\n pub mod parser;\n pub mod path_types;\n pub mod ranking;\n@@ -33,6 +34,7 @@ pub fn create_app(state: AppState) -> Router {\n         .route(\"/static/:filename\", get(crate::html::serve_static))\n         .route(\"/~/*item_path\", get(crate::html::browse))\n         .route(\"/\", get(crate::html::home))\n+        .route(\"/vote\", get(crate::html::vote::vote_page))\n         .route(\"/ui\", post(crate::api::ui_html::post_ui_html))\n         .with_state(state)\n         .layer(TraceLayer::new_for_http())\ndiff --git a/server/src/ui_action.rs b/server/src/ui_action.rs\nindex 2047713762c932ac9bc325fe15624f2aecb3364d..53581e1362bfcc5dfb4ae3069c41ea6f7be41437 100644\n--- a/server/src/ui_action.rs\n+++ b/server/src/ui_action.rs\n@@ -31,6 +31,9 @@ pub enum HtmlUiAction {\n         /// Parent node [`ItemId`] string; empty = tree root.\n         #[serde(default)]\n         scope: String,\n+        /// After vote, navigate here (vote compare page).\n+        #[serde(default)]\n+        next: String,\n     },\n     /// Parse pasted Reddit URL/path; redirect to subreddit ranking on success.\n     ParseQuery {\n@@ -70,6 +73,36 @@ pub fn parse_html_ui_from_form(\n mod tests {\n     use super::*;\n \n+    #[test]\n+    fn record_vote_round_trip_with_typed_ratio_holes() {\n+        let template = serde_json::json!({\n+            \"action\": \"record_vote\",\n+            \"a\": \"x\",\n+            \"b\": \"y\",\n+            \"ratio_left\": {\"$form:i32\": \"ratio_left\"},\n+            \"ratio_right\": {\"$form:i32\": \"ratio_right\"},\n+            \"scope\": \"parent\",\n+        });\n+        let mut form = HashMap::new();\n+        form.insert(\n+            UI_RPC_FIELD.to_string(),\n+            serde_json::to_string(&template).unwrap(),\n+        );\n+        form.insert(\"ratio_left\".into(), \"60\".into());\n+        form.insert(\"ratio_right\".into(), \"40\".into());\n+        assert_eq!(\n+            parse_html_ui_from_form(&form).unwrap(),\n+            HtmlUiAction::RecordVote {\n+                a: \"x\".into(),\n+                b: \"y\".into(),\n+                ratio_left: 60,\n+                ratio_right: 40,\n+                scope: \"parent\".into(),\n+                next: String::new(),\n+            }\n+        );\n+    }\n+\n     #[test]\n     fn record_vote_round_trip_with_form_holes() {\n         let template = serde_json::json!({\n@@ -96,6 +129,7 @@ mod tests {\n                 ratio_left: 2,\n                 ratio_right: 1,\n                 scope: \"amitheasshole\".into(),\n+                next: String::new(),\n             }\n         );\n     }\n@@ -122,6 +156,7 @@ mod tests {\n                 ratio_left: 2,\n                 ratio_right: 1,\n                 scope: String::new(),\n+                next: String::new(),\n             }\n         );\n     }\ndiff --git a/server/static/sorter.css b/server/static/sorter.css\nindex 021918f8e778b84e4b3eac8559fab7d223a3d490..3c2cec5cb5094013387147c621d75bd341bc06cc 100644\n--- a/server/static/sorter.css\n+++ b/server/static/sorter.css\n@@ -224,4 +224,148 @@ code {\n \n h1 {\n   margin: 0;\n+}\n+\n+.vote-cta {\n+  margin: 0.75rem 0;\n+}\n+\n+.vote-compare-shell {\n+  max-width: 960px;\n+}\n+\n+.vote-compare-scope {\n+  margin: 0.5rem 0 1rem;\n+}\n+\n+.vote-compare-pair {\n+  display: grid;\n+  grid-template-columns: 1fr auto 1fr;\n+  gap: 1rem;\n+  align-items: start;\n+  margin: 1rem 0;\n+}\n+\n+.vote-compare-vs {\n+  align-self: center;\n+  font-size: 1.25rem;\n+  color: var(--muted);\n+  font-weight: 600;\n+}\n+\n+.vote-compare-side {\n+  background: var(--panel);\n+  border: 1px solid var(--border);\n+  border-radius: 8px;\n+  padding: 1rem;\n+  min-height: 120px;\n+}\n+\n+.vote-compare-item {\n+  color: var(--accent);\n+  text-decoration: none;\n+  display: block;\n+}\n+\n+.vote-compare-item:hover {\n+  text-decoration: underline;\n+}\n+\n+.vote-compare-figure {\n+  margin: 0.75rem 0 0;\n+}\n+\n+.vote-compare-image {\n+  display: block;\n+  max-width: 100%;\n+  height: auto;\n+  border-radius: 6px;\n+  border: 1px solid var(--border);\n+}\n+\n+.vote-compare-item-body {\n+  margin-top: 0.75rem;\n+  font-size: 0.9rem;\n+}\n+\n+.vote-compare-nav {\n+  display: flex;\n+  justify-content: space-between;\n+  align-items: center;\n+  gap: 1rem;\n+  margin: 1rem 0;\n+}\n+\n+.vote-compare-next {\n+  color: var(--accent);\n+  text-decoration: none;\n+}\n+\n+.vote-compare-next.is-disabled {\n+  color: var(--muted);\n+}\n+\n+.vote-compare-back {\n+  text-decoration: none;\n+}\n+\n+.vote-compare-back:hover {\n+  text-decoration: underline;\n+}\n+\n+.vote-compare-slider-label {\n+  display: grid;\n+  grid-template-columns: 1fr auto 1fr;\n+  gap: 0.75rem;\n+  align-items: center;\n+  margin: 1.25rem 0;\n+}\n+\n+.vote-compare-slider-label input[type=\"range\"] {\n+  width: 100%;\n+  min-width: 160px;\n+}\n+\n+#vote-slider-left-label {\n+  text-align: right;\n+}\n+\n+#vote-slider-right-label {\n+  text-align: left;\n+}\n+\n+.vote-edge-history-title {\n+  margin: 1.5rem 0 0.5rem;\n+  font-size: 1rem;\n+}\n+\n+.vote-edge-history {\n+  list-style: none;\n+  padding: 0;\n+  margin: 0;\n+}\n+\n+.vote-edge-history-row {\n+  margin-bottom: 0.75rem;\n+}\n+\n+.vote-edge-meta {\n+  font-size: 0.875rem;\n+  margin-bottom: 0.25rem;\n+}\n+\n+.ratio-bar {\n+  display: flex;\n+  height: 8px;\n+  border-radius: 4px;\n+  overflow: hidden;\n+  background: var(--border);\n+}\n+\n+.ratio-left {\n+  background: var(--accent);\n+}\n+\n+.ratio-right {\n+  background: var(--muted);\n }\n\\ No newline at end of file\ndiff --git a/server/static/sorter_ui.js b/server/static/sorter_ui.js\nindex 62c9158ecb3c2140b83efd2b27ea706a9e0ae127..c8d7c3ef2413399ced7898a7edb3e7a2c8e16163 100644\n--- a/server/static/sorter_ui.js\n+++ b/server/static/sorter_ui.js\n@@ -81,7 +81,22 @@\n     });\n   }\n \n+  function initVoteSlider() {\n+    var slider = document.getElementById('vote-preference-slider');\n+    if (!slider) return;\n+    var leftInput = document.getElementById('vote-ratio-left');\n+    var rightInput = document.getElementById('vote-ratio-right');\n+    function update() {\n+      var v = parseInt(slider.value, 10);\n+      if (leftInput) leftInput.value = String(v);\n+      if (rightInput) rightInput.value = String(100 - v);\n+    }\n+    slider.addEventListener('input', update);\n+    update();\n+  }\n+\n   function initSorterUi() {\n+    initVoteSlider();\n     document.addEventListener('submit', async function (e) {\n       var f = e.target;\n       if (!f || f.tagName !== 'FORM') return;\n@@ -89,10 +104,11 @@\n       if (f.getAttribute('data-navigate') === 'full') return;\n       e.preventDefault();\n       await postUiForm(f);\n-      if (f.id === 'vote-form') {\n+      if (f.id === 'vote-form' || f.id === 'vote-compare-form') {\n         f.reset();\n-        var firstField = f.querySelector('input[type=\"text\"]');\n-        if (firstField) firstField.focus();\n+        var slider = f.querySelector('#vote-preference-slider');\n+        if (slider) slider.value = '50';\n+        initVoteSlider();\n       }\n     });\n   }\n","role":"user"}],"model":"~anthropic/claude-sonnet-latest"}