{"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[07715165] nice\n\nSide A — unified diff (full patch):\ndiff --git a/server/src/api/ui_html.rs b/server/src/api/ui_html.rs\nindex c3c62a76f424010d77a6090c84dd0b82098f573e..da2536112faea313352624cf2ce0ddd0ab3377c1 100644\n--- a/server/src/api/ui_html.rs\n+++ b/server/src/api/ui_html.rs\n@@ -6,7 +6,7 @@ use axum::{\n use std::collections::HashMap;\n \n use crate::{\n-    html::{demo_counter_panel, js_string_literal, ranking_panel, JsBuilder},\n+    html::{js_string_literal, ranking_panel, JsBuilder},\n     parser::parse_reddit_url,\n     parser_render::parser_panel_morph,\n     state::AppState,\n@@ -35,13 +35,6 @@ pub async fn post_ui_html(\n     };\n \n     match action {\n-        HtmlUiAction::BumpDemoCounter => {\n-            let count = state.bump_demo_counter().await;\n-            let panel = demo_counter_panel(count, state.event_log.path().to_string_lossy().as_ref());\n-            JsBuilder::new()\n-                .morph_selector(\"#demo-counter-panel\", panel)\n-                .into_response()\n-        }\n         HtmlUiAction::RecordVote {\n             a,\n             b,\n@@ -54,8 +47,8 @@ pub async fn post_ui_html(\n             {\n                 return ui_js_warn(&e).into_response();\n             }\n-            let mut group = state.group.write().await;\n-            let panel = ranking_panel(&mut group);\n+            let group = state.group.read().await;\n+            let panel = ranking_panel(&group);\n             JsBuilder::new()\n                 .morph_selector(\"#ranking-panel\", panel)\n                 .into_response()\n@@ -87,20 +80,6 @@ mod tests {\n         assert!(matches!(err, HtmlUiParseError::MissingRpc));\n     }\n \n-    #[test]\n-    fn bump_action_deserializes() {\n-        let template = serde_json::json!({ \"action\": \"bump_demo_counter\" });\n-        let mut form = HashMap::new();\n-        form.insert(\n-            UI_RPC_FIELD.to_string(),\n-            serde_json::to_string(&template).unwrap(),\n-        );\n-        assert_eq!(\n-            parse_html_ui_from_form(&form).unwrap(),\n-            HtmlUiAction::BumpDemoCounter\n-        );\n-    }\n-\n     #[test]\n     fn record_vote_action_deserializes() {\n         let template = serde_json::json!({\ndiff --git a/server/src/events.rs b/server/src/events.rs\nindex b969242534e184d4f0a689543a479670b08a18df..eff80aef0257f706d2341f666e63d6a3d921bf6e 100644\n--- a/server/src/events.rs\n+++ b/server/src/events.rs\n@@ -5,8 +5,6 @@ use serde::{Deserialize, Serialize};\n pub enum Event {\n     /// Page view recorded (path → counter in views.json).\n     ViewRecorded { path: String, ts: i64 },\n-    /// Demo counter bump from `POST /ui` (persisted in the single JSONL log).\n-    DemoCounterBumped { ts: i64, value: u64 },\n     /// Pairwise comparison vote (replayed into [`crate::reducer::GroupState`] on boot).\n     VoteRecorded {\n         ts: i64,\ndiff --git a/server/src/html/mod.rs b/server/src/html/mod.rs\nindex 5b1d0b5a887d89e7e80796aa7a6c8ed5baaf2782..d69ed962b5c8625bc83c933b1825f2cc1d0868e2 100644\n--- a/server/src/html/mod.rs\n+++ b/server/src/html/mod.rs\n@@ -13,7 +13,7 @@ use crate::{\n     form_template::template_json_compact,\n     parser_action::ParserAction,\n     parser_render::parser_panel,\n-    ranking::ranked_items,\n+    ranking::ranked_items_cached,\n     reducer::GroupState,\n     state::AppState,\n     ui_action::UI_RPC_FIELD,\n@@ -199,10 +199,8 @@ fn layout(title: &str, body: Markup, views: u64, theme: &str, theme_next: &str)\n     }\n }\n \n-pub fn ranking_panel(group: &mut GroupState) -> Markup {\n-    const MAX_ITERS: usize = 10_000;\n-    const TOL: f64 = 1e-8;\n-    let items = ranked_items(group, MAX_ITERS, TOL);\n+pub fn ranking_panel(group: &GroupState) -> Markup {\n+    let items = ranked_items_cached(group);\n     html! {\n         section id=\"ranking-panel\" class=\"demo-panel\" {\n             h2 { \"Ranking\" }\n@@ -260,35 +258,6 @@ pub fn vote_panel() -> Markup {\n }\n \n \n-pub fn demo_counter_panel(count: u64, event_log_path: &str) -> Markup {\n-    let rpc = template_json_compact(&serde_json::json!({ \"action\": \"bump_demo_counter\" }))\n-        .expect(\"rpc json\");\n-    html! {\n-        section id=\"demo-counter-panel\" class=\"demo-panel\" {\n-            h1 { \"sorter2\" }\n-            p class=\"muted\" {\n-                \"Pairwise ranking scaffold — votes persist to JSONL and replay on boot.\"\n-            }\n-            p class=\"demo-count\" {\n-                strong { \"Counter: \" }\n-                span id=\"demo-count-value\" { (count) }\n-            }\n-            p class=\"muted small\" {\n-                \"Event log: \" code { (event_log_path) }\n-            }\n-            form method=\"post\" action=\"/ui\" id=\"demo-bump-form\" {\n-                input type=\"hidden\" name=(UI_RPC_FIELD) value=(rpc);\n-                button type=\"submit\" class=\"btn-primary\" { \"Bump (POST /ui → eval JS)\" }\n-            }\n-            p class=\"muted small\" {\n-                \"Uses hidden \"\n-                code { \"__rpc__\" }\n-                \" JSON + Idiomorph morph — no full page reload.\"\n-            }\n-        }\n-    }\n-}\n-\n pub async fn home(\n     State(state): State<AppState>,\n     jar: CookieJar,\n@@ -297,16 +266,15 @@ pub async fn home(\n     let path = uri.path().to_string();\n     state.views.increment(path.clone());\n     let views = state.views.get_views(&path);\n-    let count = *state.demo_counter.read().await;\n     let theme = theme_from_jar(&jar);\n     let theme_next = theme_next_from_uri(&uri);\n-    let mut group = state.group.write().await;\n+    let group = state.group.read().await;\n     let empty_action = ParserAction::suggest(String::new(), None);\n     let body = html! {\n+        h1 { \"sorter2\" }\n         (parser_panel(\"\", &empty_action))\n         (vote_panel())\n-        (ranking_panel(&mut group))\n-        (demo_counter_panel(count, state.event_log.path().to_string_lossy().as_ref()))\n+        (ranking_panel(&group))\n     };\n     layout(\"sorter2\", body, views, theme, &theme_next)\n }\ndiff --git a/server/src/lib.rs b/server/src/lib.rs\nindex 6716c5b282e7980a7a0f03d63ad8b25eda61cc55..fa423640d598f4ba97a5885d228e78d7b97f7a22 100644\n--- a/server/src/lib.rs\n+++ b/server/src/lib.rs\n@@ -9,6 +9,7 @@ pub mod parser_render;\n pub mod path_types;\n pub mod ranking;\n pub mod reducer;\n+pub mod settlement;\n pub mod state;\n pub mod ui_action;\n pub mod views;\ndiff --git a/server/src/ranking.rs b/server/src/ranking.rs\nindex 89d3280126a8d8f841721ce8cb63ff735d68752a..2d706762792ba9239bb3f1c2e4974a2fde908013 100644\n--- a/server/src/ranking.rs\n+++ b/server/src/ranking.rs\n@@ -91,6 +91,11 @@ pub fn compute_group_ranking(group: &mut GroupState, max_iters: usize, tol: f64)\n \n pub fn ranked_items(group: &mut GroupState, max_iters: usize, tol: f64) -> Vec<RankedItem> {\n     compute_group_ranking(group, max_iters, tol);\n+    ranked_items_cached(group)\n+}\n+\n+/// Read cached scores without recomputing (HTTP fast path).\n+pub fn ranked_items_cached(group: &GroupState) -> Vec<RankedItem> {\n     let mut items: Vec<RankedItem> = group\n         .idx_to_item\n         .iter()\n@@ -105,7 +110,12 @@ pub fn ranked_items(group: &mut GroupState, max_iters: usize, tol: f64) -> Vec<R\n     items\n }\n \n-fn compute_scores_from_edges(n: usize, edges: impl Iterator<Item = ((usize, usize), f64)>, max_iters: usize, tol: f64) -> Vec<f64> {\n+pub fn compute_scores_from_edges(\n+    n: usize,\n+    edges: impl Iterator<Item = ((usize, usize), f64)>,\n+    max_iters: usize,\n+    tol: f64,\n+) -> Vec<f64> {\n     if n == 0 {\n         return vec![];\n     }\ndiff --git a/server/src/settlement.rs b/server/src/settlement.rs\nnew file mode 100644\nindex 0000000000000000000000000000000000000000..1f722ceaea62cda22c28ab71551f259fbf049b81\n--- /dev/null\n+++ b/server/src/settlement.rs\n@@ -0,0 +1,114 @@\n+use std::sync::Arc;\n+\n+use tokio::sync::{mpsc, oneshot, RwLock};\n+\n+use crate::{\n+    event_log::EventLog,\n+    events::Event,\n+    ranking::compute_scores_from_edges,\n+    reducer::{GroupState, VoteData},\n+};\n+\n+const MAX_ITERS: usize = 10_000;\n+const TOL: f64 = 1e-8;\n+\n+pub struct SettlementCommand {\n+    pub vote: VoteData,\n+    pub event: Event,\n+    pub reply: oneshot::Sender<Result<(), String>>,\n+}\n+\n+#[derive(Clone)]\n+pub struct SettlementClient {\n+    tx: mpsc::Sender<SettlementCommand>,\n+}\n+\n+impl SettlementClient {\n+    pub fn spawn(group: Arc<RwLock<GroupState>>, event_log: Arc<EventLog>) -> Self {\n+        let (tx, rx) = mpsc::channel(64);\n+        tokio::spawn(settlement_worker(rx, group, event_log));\n+        Self { tx }\n+    }\n+\n+    pub async fn record_vote(&self, vote: VoteData, event: Event) -> Result<(), String> {\n+        let (reply, rx) = oneshot::channel();\n+        self.tx\n+            .send(SettlementCommand {\n+                vote,\n+                event,\n+                reply,\n+            })\n+            .await\n+            .map_err(|_| \"settlement worker stopped\".to_string())?;\n+        rx.await\n+            .map_err(|_| \"settlement worker stopped\".to_string())?\n+    }\n+}\n+\n+async fn settlement_worker(\n+    mut rx: mpsc::Receiver<SettlementCommand>,\n+    group: Arc<RwLock<GroupState>>,\n+    event_log: Arc<EventLog>,\n+) {\n+    while let Some(first) = rx.recv().await {\n+        let mut batch = vec![first];\n+        while let Ok(more) = rx.try_recv() {\n+            batch.push(more);\n+        }\n+\n+        let mut disk_err: Option<String> = None;\n+        for cmd in &batch {\n+            if let Err(e) = event_log.append(&cmd.event).await {\n+                disk_err = Some(e.to_string());\n+                break;\n+            }\n+        }\n+\n+        if let Some(err) = disk_err {\n+            for cmd in batch {\n+                let _ = cmd.reply.send(Err(err.clone()));\n+            }\n+            continue;\n+        }\n+\n+        let (edges, n) = {\n+            let mut w = group.write().await;\n+            for cmd in &batch {\n+                w.apply_vote(cmd.vote.clone());\n+            }\n+            (w.edges.clone(), w.idx_to_item.len())\n+        };\n+\n+        let new_scores = compute_scores_from_edges(\n+            n,\n+            edges.iter().map(|(&k, &v)| (k, v)),\n+            MAX_ITERS,\n+            TOL,\n+        );\n+\n+        {\n+            let mut w = group.write().await;\n+            w.cached_scores = new_scores;\n+            w.dirty = false;\n+        }\n+\n+        for cmd in batch {\n+            let _ = cmd.reply.send(Ok(()));\n+        }\n+    }\n+}\n+\n+/// Compute ranking cache from current in-memory edges (startup replay only).\n+pub fn warm_ranking_cache(group: &mut GroupState) {\n+    if !group.dirty {\n+        return;\n+    }\n+    let n = group.idx_to_item.len();\n+    group.cached_scores = compute_scores_from_edges(\n+        n,\n+        group.edges.iter().map(|(&k, &v)| (k, v)),\n+        MAX_ITERS,\n+        TOL,\n+    );\n+    group.dirty = false;\n+}\ndiff --git a/server/src/state.rs b/server/src/state.rs\nindex 8ec9902e2ecc31cf8208f7ad6365891dc5537eed..1922541a4064c2de1df2d993a461cae783320e05 100644\n--- a/server/src/state.rs\n+++ b/server/src/state.rs\n@@ -6,6 +6,7 @@ use crate::{\n     event_log::EventLog,\n     events::Event,\n     reducer::{GroupState, VoteData},\n+    settlement::{warm_ranking_cache, SettlementClient},\n     views::ViewStore,\n };\n \n@@ -38,8 +39,8 @@ pub struct AppState {\n     pub cfg: Arc<AppConfig>,\n     pub event_log: Arc<EventLog>,\n     pub views: ViewStore,\n-    pub demo_counter: Arc<RwLock<u64>>,\n     pub group: Arc<RwLock<GroupState>>,\n+    settlement: SettlementClient,\n }\n \n impl AppState {\n@@ -48,14 +49,10 @@ impl AppState {\n         let views_path = format!(\"{}/views.json\", cfg.data_dir);\n         let views = ViewStore::new(&views_path);\n \n-        let mut demo_counter: u64 = 0;\n         let mut group = GroupState::new();\n         if let Ok((events, _)) = event_log.load_all().await {\n             for ev in events {\n                 match ev {\n-                    Event::DemoCounterBumped { value, .. } => {\n-                        demo_counter = demo_counter.max(value);\n-                    }\n                     Event::VoteRecorded {\n                         ts,\n                         a,\n@@ -74,30 +71,20 @@ impl AppState {\n             }\n         }\n \n+        warm_ranking_cache(&mut group);\n+\n+        let group = Arc::new(RwLock::new(group));\n+        let settlement = SettlementClient::spawn(group.clone(), event_log.clone());\n+\n         Self {\n             cfg: Arc::new(cfg),\n             event_log,\n             views,\n-            demo_counter: Arc::new(RwLock::new(demo_counter)),\n-            group: Arc::new(RwLock::new(group)),\n+            group,\n+            settlement,\n         }\n     }\n \n-    pub async fn bump_demo_counter(&self) -> u64 {\n-        let mut guard = self.demo_counter.write().await;\n-        *guard += 1;\n-        let value = *guard;\n-        drop(guard);\n-\n-        let ts = crate::html::now_ms();\n-        let _ = self\n-            .event_log\n-            .append(&Event::DemoCounterBumped { ts, value })\n-            .await;\n-\n-        value\n-    }\n-\n     pub async fn record_vote(\n         &self,\n         a: &str,\n@@ -109,23 +96,14 @@ impl AppState {\n         let vote = VoteData::from_recorded(ts, a, b, ratio_left, ratio_right)\n             .ok_or_else(|| \"invalid vote: need two distinct non-empty items\".to_string())?;\n \n-        {\n-            let mut group = self.group.write().await;\n-            group.apply_vote(vote.clone());\n-        }\n-\n-        let _ = self\n-            .event_log\n-            .append(&Event::VoteRecorded {\n-                ts,\n-                a: vote.a.as_str().to_string(),\n-                b: vote.b.as_str().to_string(),\n-                ratio_left: vote.ratio_left,\n-                ratio_right: vote.ratio_right,\n-            })\n-            .await\n-            .map_err(|e| e.to_string())?;\n+        let event = Event::VoteRecorded {\n+            ts,\n+            a: vote.a.as_str().to_string(),\n+            b: vote.b.as_str().to_string(),\n+            ratio_left: vote.ratio_left,\n+            ratio_right: vote.ratio_right,\n+        };\n \n-        Ok(())\n+        self.settlement.record_vote(vote, event).await\n     }\n }\ndiff --git a/server/src/ui_action.rs b/server/src/ui_action.rs\nindex 1d488e1ad1d8fd81bd9d016d69255adfe9b22fc8..5d94c84113607b3bcd8d31d03ef5b8e1b87b67a7 100644\n--- a/server/src/ui_action.rs\n+++ b/server/src/ui_action.rs\n@@ -12,8 +12,6 @@ pub const UI_RPC_FIELD: &str = \"__rpc__\";\n #[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]\n #[serde(tag = \"action\", rename_all = \"snake_case\")]\n pub enum HtmlUiAction {\n-    /// Demo: morph `#demo-counter-panel` after bumping the persisted counter.\n-    BumpDemoCounter,\n     /// Record a pairwise vote and morph `#ranking-panel`.\n     RecordVote {\n         a: String,\n@@ -52,18 +50,6 @@ pub fn parse_html_ui_from_form(\n mod tests {\n     use super::*;\n \n-    #[test]\n-    fn bump_demo_counter_round_trip() {\n-        let template = serde_json::json!({ \"action\": \"bump_demo_counter\" });\n-        let mut form = HashMap::new();\n-        form.insert(\n-            UI_RPC_FIELD.to_string(),\n-            serde_json::to_string(&template).unwrap(),\n-        );\n-        let a = parse_html_ui_from_form(&form).unwrap();\n-        assert_eq!(a, HtmlUiAction::BumpDemoCounter);\n-    }\n-\n     #[test]\n     fn record_vote_round_trip_with_form_holes() {\n         let template = serde_json::json!({\ndiff --git a/server/tests/integration_health.rs b/server/tests/integration_health.rs\nindex 8a58bc14aac68c779e7ce4ffa57d27b3220e9953..1d816e008b9bf629967e3b3c786c41afefc284e3 100644\n--- a/server/tests/integration_health.rs\n+++ b/server/tests/integration_health.rs\n@@ -38,7 +38,7 @@ async fn healthz_ok() {\n }\n \n #[tokio::test]\n-async fn home_has_demo_panel() {\n+async fn home_has_main_panels() {\n     let (addr, _tmp) = start_test_server().await;\n     let client = reqwest::Client::new();\n     let html = client\ndiff --git a/server/tests/integration_ui.rs b/server/tests/integration_ui.rs\nindex bee79407dec120699a083f1a75adf9291e207fc7..7ede46d681fefbe25b1d98fc33520a185515eb1c 100644\n--- a/server/tests/integration_ui.rs\n+++ b/server/tests/integration_ui.rs\n@@ -25,33 +25,6 @@ async fn start_test_server() -> (SocketAddr, TempDir) {\n     (addr, tmp)\n }\n \n-#[tokio::test]\n-async fn post_ui_bump_returns_javascript_morph() {\n-    let (addr, tmp) = start_test_server().await;\n-    let rpc = serde_json::json!({ \"action\": \"bump_demo_counter\" }).to_string();\n-    let mut form = HashMap::new();\n-    form.insert(UI_RPC_FIELD.to_string(), rpc);\n-\n-    let client = reqwest::Client::new();\n-    let body = client\n-        .post(format!(\"http://{addr}/ui\"))\n-        .form(&form)\n-        .send()\n-        .await\n-        .unwrap()\n-        .text()\n-        .await\n-        .unwrap();\n-\n-    assert!(body.contains(\"Idiomorph.morph\"));\n-    assert!(body.contains(\"demo-counter-panel\"));\n-    assert!(body.contains(\"Counter:\"));\n-\n-    let log_path = tmp.path().join(\"events.jsonl\");\n-    let log = std::fs::read_to_string(log_path).unwrap();\n-    assert!(log.contains(\"demo_counter_bumped\"));\n-}\n-\n #[tokio::test]\n async fn post_ui_record_vote_morphs_ranking_and_persists() {\n     let (addr, tmp) = start_test_server().await;\n@@ -90,8 +63,8 @@ async fn post_ui_record_vote_morphs_ranking_and_persists() {\n         port: 0,\n     };\n     let state = create_app_state(cfg).await;\n-    let mut group = state.group.write().await;\n-    let ranked = sorter2_server::ranking::ranked_items(&mut group, 10_000, 1e-8);\n+    let group = state.group.read().await;\n+    let ranked = sorter2_server::ranking::ranked_items_cached(&group);\n     assert_eq!(ranked.len(), 2);\n     assert_eq!(ranked[0].item.as_str(), \"alpha\");\n }\ndiff --git a/test/smoke.clj b/test/smoke.clj\nindex b332324743b58baf3fe96d7477353749f137feae..11887c48282088e140d823a88ba616f6325835b3 100644\n--- a/test/smoke.clj\n+++ b/test/smoke.clj\n@@ -26,7 +26,7 @@\n             false))))))\n \n (deftest http-smoke-against-running-server\n-  (testing \"build, start, healthz, home contains RPC demo\"\n+  (testing \"build, start, healthz, home contains main panels\"\n     (let [root (repo-root)\n           data-dir (.getAbsolutePath (doto (io/file (System/getProperty \"java.io.tmpdir\")\n                                                    (str \"sorter2-smoke-\" (System/currentTimeMillis)))\n\n\nSide B — contributor: tommy-mor\nSide B — commit message:\n[aa0b175c] Enforce vote ratio constraints: both sides ≥ 1, max 100.\n\nZero on either side produces no valid graph edge; ratios above 100\nadd no meaningful signal. Enforce in the DSL parser, browser POST\nhandler, and reducer guard. Update browser pool test to use 99:1\ninstead of 100:0. Add unit and integration regression tests.\n\nCo-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>\n\nSide B — unified diff (full patch):\ndiff --git a/server/src/api/ui_html.rs b/server/src/api/ui_html.rs\nindex b79efdb4d52bd445a67f38cbfd61d3507d2b3014..bc8a0130b434cc7880a4bf16eb9237080c4aa383 100644\n--- a/server/src/api/ui_html.rs\n+++ b/server/src/api/ui_html.rs\n@@ -243,11 +243,23 @@ async fn dispatch_ui_action(\n             let pool_id = pool.as_deref().and_then(|p| {\n                 crate::path_types::ItemId::parse(p.trim()).map(|i| i.normalized_storage())\n             });\n-            let mut rl = ratio_left.trim().parse::<i32>().unwrap_or(0).max(0);\n-            let mut rr = ratio_right.trim().parse::<i32>().unwrap_or(0).max(0);\n-            if rl == 0 && rr == 0 {\n-                rl = 1;\n-                rr = 1;\n+            let rl = ratio_left.trim().parse::<i32>().unwrap_or(0).max(0);\n+            let rr = ratio_right.trim().parse::<i32>().unwrap_or(0).max(0);\n+            if rl == 0 || rr == 0 {\n+                return form_js_error(\n+                    err_tgt.as_ref(),\n+                    \"invalid ratio\",\n+                    \"Both ratio sides must be ≥ 1.\",\n+                )\n+                .into_response();\n+            }\n+            if rl > 100 || rr > 100 {\n+                return form_js_error(\n+                    err_tgt.as_ref(),\n+                    \"invalid ratio\",\n+                    \"Ratio sides must be ≤ 100.\",\n+                )\n+                .into_response();\n             }\n \n             let text = format!(\ndiff --git a/server/src/dsl.rs b/server/src/dsl.rs\nindex faa8aac6616bc6ea2b102d08ae999c01a716ef6e..338feacc579a92bed291867cc0f2f62462737462 100644\n--- a/server/src/dsl.rs\n+++ b/server/src/dsl.rs\n@@ -545,9 +545,14 @@ fn parse_block_prefixed_statement(\n \n     let ((ratio_left, ratio_right), k) = parse_comparison_at(s, i)\n         .ok_or_else(|| DslError::Parse(format!(\"invalid comparison near: {}\", &s[i..])))?;\n-    if ratio_left == 0 && ratio_right == 0 {\n+    if ratio_left == 0 || ratio_right == 0 {\n         return Err(DslError::Parse(\n-            \"vote ratio 0:0 is invalid; use 1:1 for a tie or omit the vote\".to_string(),\n+            \"vote ratio sides must be ≥ 1; use 1:1 for a tie or omit the vote\".to_string(),\n+        ));\n+    }\n+    if ratio_left > 100 || ratio_right > 100 {\n+        return Err(DslError::Parse(\n+            \"vote ratio sides must be ≤ 100\".to_string(),\n         ));\n     }\n     i = skip_ws(s, k);\n@@ -929,11 +934,50 @@ mod tests {\n         let err = parse_full(\"{tie placeholder}\\n~/a 0:0 ~/b\").unwrap_err();\n         let DslError::Parse(msg) = err;\n         assert!(\n-            msg.contains(\"0:0\"),\n-            \"expected 0:0 rejection message, got: {msg}\"\n+            msg.contains(\"≥ 1\"),\n+            \"expected zero-side rejection message, got: {msg}\"\n         );\n     }\n \n+    #[test]\n+    fn parse_vote_rejects_left_zero_ratio() {\n+        let err = parse_full(\"{prefer b}\\n~/a 0:5 ~/b\").unwrap_err();\n+        let DslError::Parse(msg) = err;\n+        assert!(\n+            msg.contains(\"≥ 1\"),\n+            \"expected zero-side rejection message, got: {msg}\"\n+        );\n+    }\n+\n+    #[test]\n+    fn parse_vote_rejects_right_zero_ratio() {\n+        let err = parse_full(\"{prefer a}\\n~/a 5:0 ~/b\").unwrap_err();\n+        let DslError::Parse(msg) = err;\n+        assert!(\n+            msg.contains(\"≥ 1\"),\n+            \"expected zero-side rejection message, got: {msg}\"\n+        );\n+    }\n+\n+    #[test]\n+    fn parse_vote_rejects_over_max_ratio() {\n+        let err = parse_full(\"{prefer a strongly}\\n~/a 101:1 ~/b\").unwrap_err();\n+        let DslError::Parse(msg) = err;\n+        assert!(\n+            msg.contains(\"≤ 100\"),\n+            \"expected max ratio rejection message, got: {msg}\"\n+        );\n+    }\n+\n+    #[test]\n+    fn parse_vote_accepts_max_ratio() {\n+        let doc = parse_full(\"{prefer a}\\n~/a 100:1 ~/b\").unwrap();\n+        assert!(matches!(\n+            doc.statements.last(),\n+            Some(Stmt::Vote { ratio_left: 100, ratio_right: 1, .. })\n+        ));\n+    }\n+\n     #[test]\n     fn parse_full_interleaves_prose() {\n         let input = \"hello\\n#tag\\nworld\";\ndiff --git a/server/src/reducer.rs b/server/src/reducer.rs\nindex e949e8e092297eedd5c20c131f16ef0121f329b3..6841d35cfc9de2389f340a22b8a45acb335e36c3 100644\n--- a/server/src/reducer.rs\n+++ b/server/src/reducer.rs\n@@ -119,11 +119,11 @@ impl GroupState {\n         let (i, j) = if a_idx < b_idx { (a_idx, b_idx) } else { (b_idx, a_idx) };\n         self.voted_pairs.insert((i, j));\n \n-        let mut w_a = vote.ratio_left.max(0) as f64;\n-        let mut w_b = vote.ratio_right.max(0) as f64;\n-        if w_a == 0.0 && w_b == 0.0 {\n-            w_a = 1.0;\n-            w_b = 1.0;\n+        let w_a = vote.ratio_left as f64;\n+        let w_b = vote.ratio_right as f64;\n+        if w_a == 0.0 || w_b == 0.0 {\n+            // Zero on either side produces no valid edge; drop the vote.\n+            return;\n         }\n \n         self.add_edge_weight(b_idx, a_idx, w_a);\ndiff --git a/server/tests/basic.rs b/server/tests/basic.rs\nindex 9d83e7a97e2c7494790db17c4b5b30c181705026..cc8c1a0d139f3722ba6ecd13dd001c65be835b67 100644\n--- a/server/tests/basic.rs\n+++ b/server/tests/basic.rs\n@@ -175,14 +175,14 @@ fn reducer_clamps_score_bounds() {\n     let mut state = ReducerState::default();\n     state.apply_event(ingest_event(\n         1,\n-        \"@00000000-0000-0000-0000-000000000000:test:local/test\\n~/t/a {a}\\n~/t/b {b}\\n{huge}\\n~/t/a 1000:1 ~/t/b\\n\",\n+        \"@00000000-0000-0000-0000-000000000000:test:local/test\\n~/t/a {a}\\n~/t/b {b}\\n{huge}\\n~/t/a 100:1 ~/t/b\\n\",\n     ));\n     state.apply_event(ingest_event(\n         2,\n-        \"@00000000-0000-0000-0000-000000000000:test:local/test\\n{huge}\\n~/t/a 1:1000 ~/t/b\\n\",\n+        \"@00000000-0000-0000-0000-000000000000:test:local/test\\n{huge}\\n~/t/a 1:100 ~/t/b\\n\",\n     ));\n \n-    assert_eq!(state.public().ranking_group.idx_to_item.len(), 2); // Should still work, scores clamped internally\n+    assert_eq!(state.public().ranking_group.idx_to_item.len(), 2); // Should still work, scores handled internally\n }\n \n // ============================================================================\n@@ -513,8 +513,8 @@ fn dsl_parse_rejects_zero_zero_vote_ratio() {\n     .expect_err(\"0:0 vote must be rejected by the parser\");\n     let slugsocial_server::dsl::DslError::Parse(msg) = err;\n     assert!(\n-        msg.contains(\"0:0\"),\n-        \"expected message about invalid 0:0 ratio, got: {msg}\"\n+        msg.contains(\"≥ 1\"),\n+        \"expected message about invalid zero ratio, got: {msg}\"\n     );\n \n     let mut state = ReducerState::default();\n@@ -533,7 +533,7 @@ fn dsl_parse_rejects_zero_zero_vote_ratio() {\n #[test]\n fn reducer_negative_ratio_clamped_to_zero() {\n     let _state = ReducerState::default();\n-    // GroupState::apply_vote clamps negatives to 0, then 0:0 -> 1:1\n+    // GroupState::apply_vote clamps negatives to 0; when either side is 0 the vote is dropped.\n     let mut group = GroupState::new();\n     group.apply_vote(slugsocial_server::reducer::VoteData {\n         ts: 1,\n@@ -546,12 +546,12 @@ fn reducer_negative_ratio_clamped_to_zero() {\n         delegate: Some(\"00000000-0000-0000-0000-000000000000:test:local/test\".to_string()),\n         thread_tag: \"t\".to_string(),\n     });\n+    // Items are registered, but the zero-clamped vote produces no edges.\n     assert_eq!(group.idx_to_item.len(), 2);\n-    // Both edges should exist (negatives clamped to 0, then 0:0 -> 1:1)\n     let a_idx = group.item_to_idx[&item_id(\"https://slug.social/~/t/a\")];\n     let b_idx = group.item_to_idx[&item_id(\"https://slug.social/~/t/b\")];\n-    assert!(group.edges.contains_key(&(a_idx, b_idx)));\n-    assert!(group.edges.contains_key(&(b_idx, a_idx)));\n+    assert!(!group.edges.contains_key(&(a_idx, b_idx)));\n+    assert!(!group.edges.contains_key(&(b_idx, a_idx)));\n }\n \n \ndiff --git a/server/tests/integration_ui.rs b/server/tests/integration_ui.rs\nindex 23db7b5672418d5bb0ab7529e05ef1f89e59062a..09c5481f039d59efb617a82bafcc432a186e2d30 100644\n--- a/server/tests/integration_ui.rs\n+++ b/server/tests/integration_ui.rs\n@@ -256,3 +256,96 @@ async fn test_sse_public_thread_morph_includes_post_body_not_thread_not_found()\n     );\n }\n \n+fn ui_vote_compare_post_rpc(\n+    room: &str,\n+    thread_tag: &str,\n+    left: &str,\n+    right: &str,\n+    ratio_left: &str,\n+    ratio_right: &str,\n+    explanation: &str,\n+) -> String {\n+    serde_json::json!({\n+        \"action\": \"vote_compare_post\",\n+        \"room\": room,\n+        \"thread_tag\": thread_tag,\n+        \"left_item\": left,\n+        \"right_item\": right,\n+        \"ratio_left\": ratio_left,\n+        \"ratio_right\": ratio_right,\n+        \"explanation\": explanation,\n+        \"next\": \"/vote\",\n+    })\n+    .to_string()\n+}\n+\n+#[tokio::test]\n+async fn test_vote_compare_post_rejects_zero_left_ratio() {\n+    let (addr, _tmp, _log, _handle) = create_test_server().await;\n+    let client = reqwest::Client::new();\n+    let bearer = test_bearer();\n+\n+    let rpc = ui_vote_compare_post_rpc(\"public\", \"test-vote\", \"~/a\", \"~/b\", \"0\", \"5\", \"prefer b\");\n+    let resp = client\n+        .post(format!(\"http://{addr}/ui\"))\n+        .header(\"Authorization\", format!(\"Bearer {bearer}\"))\n+        .form(&[(\"__rpc__\", rpc.as_str())])\n+        .send()\n+        .await\n+        .unwrap();\n+\n+    assert_eq!(resp.status(), reqwest::StatusCode::OK);\n+    let js = resp.text().await.unwrap();\n+    assert!(\n+        js.contains(\"invalid ratio\") || js.contains(\"≥ 1\"),\n+        \"expected zero-ratio rejection, got: {js}\"\n+    );\n+}\n+\n+#[tokio::test]\n+async fn test_vote_compare_post_rejects_zero_right_ratio() {\n+    let (addr, _tmp, _log, _handle) = create_test_server().await;\n+    let client = reqwest::Client::new();\n+    let bearer = test_bearer();\n+\n+    let rpc = ui_vote_compare_post_rpc(\"public\", \"test-vote\", \"~/a\", \"~/b\", \"5\", \"0\", \"prefer a\");\n+    let resp = client\n+        .post(format!(\"http://{addr}/ui\"))\n+        .header(\"Authorization\", format!(\"Bearer {bearer}\"))\n+        .form(&[(\"__rpc__\", rpc.as_str())])\n+        .send()\n+        .await\n+        .unwrap();\n+\n+    assert_eq!(resp.status(), reqwest::StatusCode::OK);\n+    let js = resp.text().await.unwrap();\n+    assert!(\n+        js.contains(\"invalid ratio\") || js.contains(\"≥ 1\"),\n+        \"expected zero-ratio rejection, got: {js}\"\n+    );\n+}\n+\n+#[tokio::test]\n+async fn test_vote_compare_post_rejects_over_max_ratio() {\n+    let (addr, _tmp, _log, _handle) = create_test_server().await;\n+    let client = reqwest::Client::new();\n+    let bearer = test_bearer();\n+\n+    let rpc =\n+        ui_vote_compare_post_rpc(\"public\", \"test-vote\", \"~/a\", \"~/b\", \"101\", \"1\", \"prefer a\");\n+    let resp = client\n+        .post(format!(\"http://{addr}/ui\"))\n+        .header(\"Authorization\", format!(\"Bearer {bearer}\"))\n+        .form(&[(\"__rpc__\", rpc.as_str())])\n+        .send()\n+        .await\n+        .unwrap();\n+\n+    assert_eq!(resp.status(), reqwest::StatusCode::OK);\n+    let js = resp.text().await.unwrap();\n+    assert!(\n+        js.contains(\"invalid ratio\") || js.contains(\"≤ 100\"),\n+        \"expected over-max ratio rejection, got: {js}\"\n+    );\n+}\n+\ndiff --git a/test/browser_vote_pool.clj b/test/browser_vote_pool.clj\nindex 23d0bd80b02bd8b1b48853454bed02793296550e..738608801027d1e662660b5d6c830b4ccd07c434 100644\n--- a/test/browser_vote_pool.clj\n+++ b/test/browser_vote_pool.clj\n@@ -38,8 +38,8 @@\n ;; Set the hidden ratio inputs so the alphabetically-earlier item wins.\n (defn- set-ratio! [pg left-text right-text]\n   (let [[rl rr] (if (neg? (compare (leaf left-text) (leaf right-text)))\n-                  [100 0]   ; left is earlier → prefer left\n-                  [0 100])] ; right is earlier → prefer right\n+                  [99 1]   ; left is earlier → prefer left\n+                  [1 99])] ; right is earlier → prefer right\n     (page/evaluate pg (str \"document.getElementById('vote-ratio-left').value='\" rl \"'\"))\n     (page/evaluate pg (str \"document.getElementById('vote-ratio-right').value='\" rr \"'\"))))\n \n","role":"user"}],"model":"~anthropic/claude-sonnet-latest"}