{"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[c59951f5] fixed canonical item paths business\n\nSide B — unified diff (full patch):\ndiff --git a/server/src/html/breadcrumb_path.rs b/server/src/html/breadcrumb_path.rs\nindex 12ad2c84faf2fbb693015d4552e45b5c54d587b9..c8a3937923161a6ff248bd77e87eff0dc6fe9ab0 100644\n--- a/server/src/html/breadcrumb_path.rs\n+++ b/server/src/html/breadcrumb_path.rs\n@@ -1,4 +1,4 @@\n-use crate::path_types::CanonicalItemUrl;\n+use crate::path_types::{tilde_http_path_to_canonical, CanonicalItemUrl};\n \n /// Semantic view of an ontology path for rendering and routing decisions.\n pub(super) struct OntologyPath {\n@@ -11,16 +11,7 @@ impl OntologyPath {\n     /// Path is the `*path` segment from `/~/*path` (e.g. `topic/a`). Always treat it as under `~/`\n     /// so it canonicalizes to `https://slug.social/~/…`, not the non-tilde site path.\n     pub(super) fn from_input(path: &str) -> Self {\n-        let p = path.trim_start_matches('/');\n-        let raw = if p.starts_with(\"http://\") || p.starts_with(\"https://\") {\n-            p.to_string()\n-        } else if p.is_empty() {\n-            \"~/\".to_string()\n-        } else {\n-            format!(\"~/{}\", p)\n-        };\n-        let canonical = CanonicalItemUrl::parse(&raw)\n-            .unwrap_or_else(|| CanonicalItemUrl::parse(\"~/\").unwrap());\n+        let canonical = tilde_http_path_to_canonical(path);\n         Self::from_canonical(canonical)\n     }\n \n@@ -37,7 +28,7 @@ impl OntologyPath {\n     }\n \n     pub(super) fn root() -> Self {\n-        Self::from_canonical(CanonicalItemUrl::parse(\"~/\").unwrap())\n+        Self::from_canonical(CanonicalItemUrl::ontology_root())\n     }\n \n     pub(super) fn is_root(&self) -> bool {\ndiff --git a/server/src/html/garden.rs b/server/src/html/garden.rs\nindex d58d9b46f575eb6b7e4971086b07dda75ca2f645..319feb15a6b68d2b5df98b4289fedbc9bdd048d3 100644\n--- a/server/src/html/garden.rs\n+++ b/server/src/html/garden.rs\n@@ -459,6 +459,8 @@ struct ItemPageViewModel {\n     item: String,\n     body: Option<String>,\n     sibling_rank: Option<SiblingRank>,\n+    /// False at the tilde ontology root (`~/`): sibling-rank footnote does not apply.\n+    item_has_parent: bool,\n     child_rankings: ChildrenRankings,\n     rank_history: Vec<RankHistoryEntryView>,\n     /// Forum threads that mention or vote on this item.\n@@ -470,11 +472,12 @@ fn build_sibling_rank(\n     scope: &ScopeId,\n     item: &CanonicalItemUrl,\n ) -> Option<SiblingRank> {\n+    let item = item.clone().normalized_storage();\n     let content = reduced\n         .content_for_scope(scope)\n         .unwrap_or_else(|| reduced.public());\n     let group = &content.ranking_group;\n-    let parent = item.parent()?;\n+    let parent = item.parent()?.normalized_storage();\n     let siblings: Vec<CanonicalItemUrl> = content\n         .item_children\n         .get(&parent)\n@@ -492,7 +495,7 @@ fn build_sibling_rank(\n     if scoped_idxs.is_empty() {\n         return None;\n     }\n-    let current_idx = *group.item_to_idx.get(item)?;\n+    let current_idx = *group.item_to_idx.get(&item)?;\n     if !scoped_idxs.contains(&current_idx) {\n         return None;\n     }\n@@ -520,7 +523,7 @@ fn build_sibling_rank(\n         .filter_map(|li| local_to_global.get(*li).copied())\n         .collect();\n     let ranked = ranked_items_subset(group, &comp_global, 10000, 1e-8);\n-    let position = ranked.iter().position(|r| &r.item == item)? + 1;\n+    let position = ranked.iter().position(|r| r.item == item)? + 1;\n     Some(SiblingRank {\n         position,\n         component_size: ranked.len(),\n@@ -597,7 +600,9 @@ fn build_item_page_view_model(\n         .content_for_scope(scope)\n         .unwrap_or_else(|| reduced.public());\n     let item_key = CanonicalItemUrl::parse(item)\n-        .unwrap_or_else(|| CanonicalItemUrl::parse(\"~/\").unwrap());\n+        .unwrap_or_else(|| CanonicalItemUrl::parse(\"~/\").unwrap())\n+        .normalized_storage();\n+    let item_has_parent = item_key.parent().is_some();\n     let child_rankings = build_children_rankings(content, &item_key);\n \n     let rank_history = build_rank_history(reduced, scope, item_key.as_str());\n@@ -617,6 +622,7 @@ fn build_item_page_view_model(\n             .cloned()\n             .or_else(|| reduced.public().item_bodies.get(&item_key).cloned()),\n         sibling_rank: build_sibling_rank(reduced, scope, &item_key),\n+        item_has_parent,\n         child_rankings,\n         rank_history,\n         threads,\n@@ -652,7 +658,7 @@ async fn render_scope_view(\n                             (format!(\"#{} of {}\", rank.position, rank.component_size))\n                         }\n                         span class=\"muted\" { (format!(\"({} siblings)\", rank.sibling_total)) }\n-                    } @else {\n+                    } @else if model.item_has_parent {\n                         span class=\"muted\" { \"unranked among siblings\" }\n                     }\n                 }\n@@ -815,6 +821,18 @@ mod tests {\n         }));\n     }\n \n+    fn apply_ingest_room(state: &mut ReducerState, ts: i64, room_id: &str, raw: &str) {\n+        state.apply_event(Event::Ingest(Ingest {\n+            ts,\n+            id: format!(\"ing-{ts}\"),\n+            raw: raw.to_string(),\n+            principal: \"testuser\".to_string(),\n+            delegate: Some(\"00000000-0000-0000-0000-000000000000:test:local/test\".to_string()),\n+            room_id: room_id.to_string(),\n+            thread_tag: String::new(),\n+        }));\n+    }\n+\n     #[test]\n     fn item_page_model_includes_body_and_unranked_without_votes() {\n         let mut reduced = ReducerState::default();\n@@ -885,4 +903,85 @@ mod tests {\n                 || model.child_rankings.unranked_items.contains(&CanonicalItemUrl(\"https://slug.social/~/topic/kid2\".to_string()))\n         );\n     }\n+\n+    #[test]\n+    fn item_page_room_scope_root_lists_top_level_children() {\n+        let mut reduced = ReducerState::default();\n+        apply_ingest_room(\n+            &mut reduced,\n+            1,\n+            \"9ab12cd/my-room\",\n+            \"@00000000-0000-0000-0000-000000000000:test:local/test\\n~/t1 {a}\\n~/t2 {b}\\n\",\n+        );\n+        use crate::path_types::CanonicalItemUrl;\n+        let root = CanonicalItemUrl::ontology_root();\n+        let model = build_item_page_view_model(\n+            &reduced,\n+            &ScopeId::Room(\"9ab12cd/my-room\".to_string()),\n+            root.as_str(),\n+        );\n+        assert!(!model.item_has_parent);\n+        assert_eq!(model.child_rankings.unranked_items.len(), 2);\n+        let set: std::collections::HashSet<&str> = model\n+            .child_rankings\n+            .unranked_items\n+            .iter()\n+            .map(|u| u.as_str())\n+            .collect();\n+        assert!(set.contains(\"https://slug.social/~/t1\"));\n+        assert!(set.contains(\"https://slug.social/~/t2\"));\n+    }\n+\n+    /// Top-level `~/a` vs `~/b` votes form one ranked component under the ontology root.\n+    #[test]\n+    fn item_page_room_scope_root_shows_ranked_child_group() {\n+        let mut reduced = ReducerState::default();\n+        apply_ingest_room(\n+            &mut reduced,\n+            1,\n+            \"9ab12cd/my-room\",\n+            \"@00000000-0000-0000-0000-000000000000:test:local/test\\n\\\n+             ~/a {a}\\n~/b {b}\\n~/a 2:1 ~/b {because}\\n\",\n+        );\n+        use crate::path_types::CanonicalItemUrl;\n+        let root = CanonicalItemUrl::ontology_root();\n+        let model = build_item_page_view_model(\n+            &reduced,\n+            &ScopeId::Room(\"9ab12cd/my-room\".to_string()),\n+            root.as_str(),\n+        );\n+        assert_eq!(model.child_rankings.component_rankings.len(), 1);\n+        assert_eq!(model.child_rankings.component_rankings[0].pairs, 1);\n+        let names: Vec<&str> = model.child_rankings.component_rankings[0]\n+            .ranked\n+            .iter()\n+            .map(|r| r.item.as_str())\n+            .collect();\n+        assert_eq!(\n+            names,\n+            vec![\"https://slug.social/~/a\", \"https://slug.social/~/b\"]\n+        );\n+        assert!(model.child_rankings.unranked_items.is_empty());\n+    }\n+\n+    /// Legacy `https://slug.social/~/` spelling still resolves children under the real root key.\n+    #[test]\n+    fn item_page_model_normalizes_legacy_tilde_root_storage_url() {\n+        let mut reduced = ReducerState::default();\n+        apply_ingest(\n+            &mut reduced,\n+            1,\n+            \"@00000000-0000-0000-0000-000000000000:test:local/test\\n~/x {x}\\n\",\n+        );\n+        let model = build_item_page_view_model(\n+            &reduced,\n+            &ScopeId::Public,\n+            \"https://slug.social/~/\",\n+        );\n+        assert_eq!(model.child_rankings.unranked_items.len(), 1);\n+        assert_eq!(\n+            model.child_rankings.unranked_items[0].as_str(),\n+            \"https://slug.social/~/x\"\n+        );\n+    }\n }\ndiff --git a/server/src/path_types.rs b/server/src/path_types.rs\nindex 4c8075bbd488f1b9a5eda9e03ced83f6238c6d5e..361a9d446c9043cbdea5f060db2e8633c2fd9bf9 100644\n--- a/server/src/path_types.rs\n+++ b/server/src/path_types.rs\n@@ -1,3 +1,5 @@\n //! Re-exports — implementations live in `slug-types` (`paths` module).\n \n-pub use slug_types::paths::{CanonicalItemUrl, RelativePath, TildePath};\n+pub use slug_types::paths::{\n+    tilde_http_path_to_canonical, CanonicalItemUrl, RelativePath, TildeHttpPathTail, TildePath,\n+};\ndiff --git a/server/src/scope_rank.rs b/server/src/scope_rank.rs\nindex dc640848232b7e79142bfeeea3003c9023f84854..d656b2f0a0a3623ca6b234b746beaaca8ae6017d 100644\n--- a/server/src/scope_rank.rs\n+++ b/server/src/scope_rank.rs\n@@ -149,9 +149,10 @@ pub fn build_rankings_for_item_set(content: &ContentState, items_in_scope: &[Can\n /// Build connected-component rankings for direct children of parent_scope.\n /// Matches the HTML garden view: multiple components, isolates, no-vote items.\n pub fn build_children_rankings(content: &ContentState, parent: &CanonicalItemUrl) -> ChildrenRankings {\n+    let parent = parent.clone().normalized_storage();\n     let items: Vec<CanonicalItemUrl> = content\n         .item_children\n-        .get(parent)\n+        .get(&parent)\n         .map(|s| s.iter().cloned().collect())\n         .unwrap_or_default();\n     build_rankings_for_item_set(content, &items)\ndiff --git a/server/tests/integration.rs b/server/tests/integration.rs\nindex f9c218378f6a173e56ae1cec797b3c492986eac0..d4c5bfe9c6f1c71dc61878bd8c5e729b1b7c69ef 100644\n--- a/server/tests/integration.rs\n+++ b/server/tests/integration.rs\n@@ -704,6 +704,62 @@ async fn test_private_room_post_links_use_private_garden_routes() {\n     assert!(garden_body.contains(&format!(\"/r/{room_short}/{room_slug}/t/garden-thread\")));\n }\n \n+#[tokio::test]\n+async fn test_private_room_garden_root_lists_top_level_tilde_children() {\n+    let (addr, _tmp, _log, _handle) = create_test_server().await;\n+    let client = reqwest::Client::builder()\n+        .redirect(reqwest::redirect::Policy::none())\n+        .build()\n+        .unwrap();\n+    let bearer = test_bearer();\n+\n+    let create = rpc_batch(\n+        &client,\n+        addr,\n+        Some(&bearer),\n+        serde_json::json!([{\n+            \"RoomCreate\": { \"slug\": \"garden-root-list\" }\n+        }]),\n+    )\n+    .await;\n+    let room_id = create[\"results\"][0][\"result\"][\"RoomCreated\"][\"room_id\"]\n+        .as_str()\n+        .unwrap()\n+        .to_string();\n+    let (room_short, room_slug) = room_id.split_once('/').unwrap();\n+\n+    let rpc = ui_post_ingest_rpc(\n+        &room_id,\n+        \"ing\",\n+        \"~/test1 {wow}\\n~/test2 {wow2}\\n~/test1 2:1 ~/test2 {because}\\n\",\n+    );\n+    let post = 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+    assert_eq!(post.status(), reqwest::StatusCode::OK);\n+\n+    let root_page = client\n+        .get(format!(\"http://{addr}/r/{room_short}/{room_slug}/~\"))\n+        .header(\"Authorization\", format!(\"Bearer {bearer}\"))\n+        .send()\n+        .await\n+        .unwrap();\n+    assert!(root_page.status().is_success());\n+    let body = root_page.text().await.unwrap();\n+    assert!(\n+        body.contains(\"ranked child groups\"),\n+        \"expected garden child panel: {}\",\n+        body.len()\n+    );\n+    assert!(body.contains(\"~/test1\"));\n+    assert!(body.contains(\"~/test2\"));\n+    assert!(body.contains(\"ordering 1\"));\n+}\n+\n #[tokio::test]\n async fn test_post_check_returns_targeted_js_error_for_missing_thread_tag() {\n     let (addr, _tmp, _log, _handle) = create_test_server().await;\ndiff --git a/test/browser_public_garden.clj b/test/browser_public_garden.clj\nnew file mode 100644\nindex 0000000000000000000000000000000000000000..7bea08e1cf2c8f5b1a94b0640a46e9ba5607b19b\n--- /dev/null\n+++ b/test/browser_public_garden.clj\n@@ -0,0 +1,100 @@\n+(ns test.browser-public-garden\n+  \"Regression: ingest ontology items in the public room via RPC, then open /~ in the browser\n+   and assert ranked + unranked paths appear (HTML garden index — not JSON API).\"\n+  (:require [babashka.fs :as fs]\n+            [cheshire.core :as json]\n+            [clojure.string :as str]\n+            [clojure.test :refer [deftest is]]\n+            [com.blockether.spel.core :as core]\n+            [com.blockether.spel.locator :as locator]\n+            [com.blockether.spel.page :as page]\n+            [test.common :as common]\n+            [test.oauth :as oauth]))\n+\n+(defn- wait-for-text [pg selector expected timeout-ms]\n+  (let [deadline (+ (System/currentTimeMillis) timeout-ms)]\n+    (loop []\n+      (let [text (locator/text-content (page/locator pg selector))]\n+        (if (and (string? text) (str/includes? text expected))\n+          true\n+          (if (< (System/currentTimeMillis) deadline)\n+            (do (Thread/sleep 200) (recur))\n+            false))))))\n+\n+(defn public-garden-flow! []\n+  (println \"\\n━━━ browser public room garden index (RPC seed + GET /~) ━━━\\n\")\n+\n+  (common/letlocals\n+   (bind build (common/run-cargo-build-release! [\"slugsocial-server\"]))\n+   (is (zero? (:exit build)) \"cargo build succeeds\")\n+   (bind server-bin \"target/release/slugsocial-server\")\n+\n+   (bind tmp-dir (str (fs/create-temp-dir {:prefix \"slug-browser-pub-garden-\"})))\n+   (bind slug-port (common/pick-port))\n+   (bind google-port (common/pick-port))\n+   (bind base-url (str \"http://127.0.0.1:\" slug-port))\n+   (bind google-url (str \"http://127.0.0.1:\" google-port))\n+\n+   (bind !server (atom nil))\n+   (bind !google (atom nil))\n+   (bind server-env (common/slug-server-env tmp-dir base-url google-url slug-port))\n+   (try\n+     (reset! !google (oauth/start-mock-google google-port\n+                                              :google-users [\"google-user-alice\"]))\n+     (reset! !server (common/start-server server-bin server-env))\n+     (is (common/wait-for-server base-url 10000) \"server responds to /healthz\")\n+\n+     (let [alice-token (oauth/fetch-bearer-token! base-url :username \"alice\")\n+           thread-tag \"browser-pub-garden\"\n+           ;; Ranked pair at root + one isolate so both panels are exercised.\n+           raw (str \"# \" thread-tag \"\\n\\n\"\n+                    \"~/br-pub-a {alpha}\\n\"\n+                    \"~/br-pub-b {beta}\\n\"\n+                    \"~/br-pub-c {gamma}\\n\"\n+                    \"~/br-pub-a 2:1 ~/br-pub-b {browser regression vote}\\n\")\n+           post-resp (oauth/http-post-json\n+                      (str base-url \"/api/v0/rpc\")\n+                      [{\"Post\" {\"room\" \"public\"\n+                                \"thread_tag\" thread-tag\n+                                \"text\" raw\n+                                \"return_rank_diff\" false}}]\n+                      :headers {\"Authorization\" (str \"Bearer \" alice-token)})\n+           post-json (json/parse-string (:body post-resp) false)\n+           _ (is (true? (get-in post-json [\"results\" 0 \"ok\"])) \"seed public post via rpc\")\n+           rank-resp (oauth/http-post-json\n+                      (str base-url \"/api/v0/rpc\")\n+                      [{\"GetGardenRank\" {\"room\" \"public\"\n+                                         \"parent_path\" \"~\"\n+                                         \"depth\" 1}}])\n+           rank-json (json/parse-string (:body rank-resp) false)\n+           _ (is (true? (get-in rank-json [\"results\" 0 \"ok\"])) \"GetGardenRank ok\")\n+           comps (get-in rank-json [\"results\" 0 \"result\" \"GardenRank\" \"components\"])\n+           _ (is (pos? (count comps)) \"rank API reports at least one component\")]\n+       (core/with-playwright [pw]\n+         (core/with-browser [browser (core/launch-chromium pw {:headless true :channel \"chrome\"})]\n+           (core/with-context [ctx (core/new-context browser)]\n+             (core/with-page [pg (core/new-page-from-context ctx)]\n+               (page/navigate pg (str base-url \"/login\"))\n+               (is (wait-for-text pg \"body\" \"@alice\" 15000) \"alice session after login\")\n+               (page/navigate pg (str base-url \"/~\"))\n+               (is (wait-for-text pg \"body\" \"paths\" 15000) \"public garden index shows paths heading\")\n+               (is (wait-for-text pg \"body\" \"ordering\" 10000)\n+                   \"ranked child group meta visible\")\n+               (is (wait-for-text pg \"body\" \"~/br-pub-a\" 10000) \"ranked list shows ~/br-pub-a\")\n+               (is (wait-for-text pg \"body\" \"~/br-pub-b\" 10000) \"ranked list shows ~/br-pub-b\")\n+               (is (wait-for-text pg \"body\" \"unranked\" 10000) \"unranked section present\")\n+               (is (wait-for-text pg \"body\" \"~/br-pub-c\" 10000)\n+                   \"unranked list shows ~/br-pub-c\"))))))\n+\n+     (finally\n+       (when-some [s @!server] (common/kill-server s))\n+       (when-some [g @!google] ((:stop-fn g)))\n+       (fs/delete-tree tmp-dir)))\n+\n+   nil))\n+\n+(defn public-garden-browser-test [& _args]\n+  (public-garden-flow!))\n+\n+(deftest browser-public-garden-index-check\n+  (public-garden-flow!))\ndiff --git a/tests.edn b/tests.edn\nindex 56fdfa4f29383ad305fd8068783e4efe2ed334a0..6e96432ba766461b4233c75dc48db2633483e5e0 100644\n--- a/tests.edn\n+++ b/tests.edn\n@@ -16,7 +16,8 @@\n    :ns-patterns [\"^test\\\\.browser-sse$\"\n                  \"^test\\\\.browser-ui-morph$\"\n                  \"^test\\\\.browser-post-redact$\"\n-                 \"^test\\\\.browser-room-delete$\"]\n+                 \"^test\\\\.browser-room-delete$\"\n+                 \"^test\\\\.browser-public-garden$\"]\n    :kaocha.filter/skip-meta [:skip]\n    :parallel? false}]\n  :plugins [:kaocha.plugin/junit-xml]\ndiff --git a/types/src/lib.rs b/types/src/lib.rs\nindex 8cea90238ef6207d65ecdb2903b8958fafb213d2..edbb923e4d7d41ad82dfc254c3bd697562383527 100644\n--- a/types/src/lib.rs\n+++ b/types/src/lib.rs\n@@ -4,8 +4,9 @@ pub mod paths;\n pub mod timeago;\n \n pub use paths::{\n-    canonicalize_item, canonicalize_tag, item_parent_path, item_path_segments, CanonicalItemUrl,\n-    ForumThreadUrl, GardenItemUrl, RelativePath, TildeOntologyPath, TildePath,\n+    canonicalize_item, canonicalize_tag, item_parent_path, item_path_segments, normalize_slug_ontology_storage_url,\n+    CanonicalItemUrl, ForumThreadUrl, GardenItemUrl, RelativePath, SLUG_TILDE_ONTOLOGY_ROOT,\n+    TildeHttpPathTail, TildeOntologyPath, TildePath, tilde_http_path_to_canonical,\n };\n \n /// Max characters returned for a garden item body unless `full=true` / `--full` (API + CLI).\ndiff --git a/types/src/paths.rs b/types/src/paths.rs\nindex 668323ed777f360f2838a0dfe6eae68905d1183b..8971f599a7ebcf399f60c306d35ee28d0f581194 100644\n--- a/types/src/paths.rs\n+++ b/types/src/paths.rs\n@@ -1,5 +1,13 @@\n //! Canonical paths, storage ids, and JSON href newtypes. All normalization and\n //! room-aware URL rules for items live here.\n+//!\n+//! ## String kinds (parse in this module only)\n+//!\n+//! - **[`canonicalize_item`] / [`CanonicalItemUrl`]** — graph storage key and DSL form; tilde\n+//!   ontology root is always [`SLUG_TILDE_ONTOLOGY_ROOT`] (no `…/~/` trailing slash only).\n+//! - **[`TildeHttpPathTail`]** — capture from `GET /~/*path` or `…/r/…/~/…` (the `*path` segment).\n+//! - **`-/…` wire form** — external items; see [`canonicalize_item`] dash branch.\n+//! - **[`GardenItemUrl`], [`ForumThreadUrl`]** — JSON / browser href surfaces.\n \n use std::borrow::Borrow;\n use std::fmt;\n@@ -7,6 +15,23 @@ use std::ops::Deref;\n \n use serde::{Deserialize, Serialize};\n \n+// ---------------------------------------------------------------------------\n+// Slug tilde ontology (single storage form for `~/`)\n+// ---------------------------------------------------------------------------\n+\n+/// Canonical absolute URL for the tilde ontology **root** (`~/` in UI). Used as the\n+/// `item_children` parent key for top-level items and must match [`CanonicalItemUrl::ontology_root`].\n+pub const SLUG_TILDE_ONTOLOGY_ROOT: &str = \"https://slug.social/~\";\n+\n+/// Collapse legacy or parser variants of the ontology root to [`SLUG_TILDE_ONTOLOGY_ROOT`].\n+pub fn normalize_slug_ontology_storage_url(s: &str) -> String {\n+    if s == \"https://slug.social/~/\" {\n+        SLUG_TILDE_ONTOLOGY_ROOT.to_string()\n+    } else {\n+        s.to_string()\n+    }\n+}\n+\n // ---------------------------------------------------------------------------\n // Normalization (moved from server `canonical_path`)\n // ---------------------------------------------------------------------------\n@@ -89,6 +114,9 @@ pub fn canonicalize_item(input: &str) -> String {\n         .join(\"/\");\n \n     if is_tilde {\n+        if tail.is_empty() {\n+            return SLUG_TILDE_ONTOLOGY_ROOT.to_string();\n+        }\n         format!(\"https://slug.social/~/{}\", tail)\n     } else if tail.is_empty() {\n         \"https://slug.social\".to_string()\n@@ -173,7 +201,7 @@ impl CanonicalItemUrl {\n         if c.is_empty() {\n             None\n         } else {\n-            Some(Self(c))\n+            Some(Self(normalize_slug_ontology_storage_url(&c)))\n         }\n     }\n \n@@ -181,8 +209,19 @@ impl CanonicalItemUrl {\n         &self.0\n     }\n \n+    /// Collapses legacy slug ontology root spellings so [`HashMap`] keys match the reducer graph.\n+    pub fn normalized_storage(self) -> Self {\n+        Self(normalize_slug_ontology_storage_url(self.as_str()))\n+    }\n+\n     pub fn tilde_tail(&self) -> Option<&str> {\n-        self.0.strip_prefix(\"https://slug.social/~/\")\n+        if let Some(tail) = self.0.strip_prefix(\"https://slug.social/~/\") {\n+            return Some(tail);\n+        }\n+        if self.0 == SLUG_TILDE_ONTOLOGY_ROOT || self.0 == \"https://slug.social/~/\" {\n+            return Some(\"\");\n+        }\n+        None\n     }\n \n     pub fn last_segment(&self) -> &str {\n@@ -193,7 +232,7 @@ impl CanonicalItemUrl {\n     }\n \n     pub fn ontology_root() -> Self {\n-        Self(\"https://slug.social/~\".to_string())\n+        Self(SLUG_TILDE_ONTOLOGY_ROOT.to_string())\n     }\n \n     pub fn parent(&self) -> Option<Self> {\n@@ -234,9 +273,13 @@ impl CanonicalItemUrl {\n \n     /// `-/` representation for external `https://…` items, `~/…` for slug ontology, else unchanged.\n     pub fn display_path(&self) -> String {\n-        if let Some(tail) = self.0.strip_prefix(\"https://slug.social/~/\") {\n-            format!(\"~/{}\", tail)\n-        } else if let Some(tail) = self.0.strip_prefix(\"https://\") {\n+        if let Some(tail) = self.tilde_tail() {\n+            if tail.is_empty() {\n+                return \"~/\".to_string();\n+            }\n+            return format!(\"~/{}\", tail);\n+        }\n+        if let Some(tail) = self.0.strip_prefix(\"https://\") {\n             if tail.starts_with(\"slug.social\") {\n                 self.0.clone()\n             } else {\n@@ -276,6 +319,37 @@ impl CanonicalItemUrl {\n     }\n }\n \n+/// HTTP route capture: path segment after `~/` in `GET /~/*path` or `…/r/…/~/…` (empty = ontology root).\n+#[derive(Debug, Clone, PartialEq, Eq, Hash)]\n+pub struct TildeHttpPathTail(pub String);\n+\n+impl TildeHttpPathTail {\n+    pub fn new(path_segment: &str) -> Self {\n+        Self(path_segment.trim_start_matches('/').to_string())\n+    }\n+\n+    pub fn as_str(&self) -> &str {\n+        &self.0\n+    }\n+\n+    pub fn to_canonical(&self) -> CanonicalItemUrl {\n+        tilde_http_path_to_canonical(self.as_str())\n+    }\n+}\n+\n+/// Map the router's tilde tail (e.g. `topic/a`, or empty for root) to a [`CanonicalItemUrl`].\n+pub fn tilde_http_path_to_canonical(path_segment: &str) -> CanonicalItemUrl {\n+    let p = path_segment.trim_start_matches('/');\n+    let raw = if p.starts_with(\"http://\") || p.starts_with(\"https://\") {\n+        p.to_string()\n+    } else if p.is_empty() {\n+        \"~/\".to_string()\n+    } else {\n+        format!(\"~/{}\", p)\n+    };\n+    CanonicalItemUrl::parse(&raw).unwrap_or_else(|| CanonicalItemUrl::ontology_root())\n+}\n+\n impl fmt::Display for CanonicalItemUrl {\n     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {\n         self.0.fmt(f)\n@@ -557,6 +631,44 @@ mod tests {\n     fn canonical_parent_root_is_none() {\n         let root = CanonicalItemUrl::parse(\"~/\").unwrap();\n         assert!(root.parent().is_none());\n+        assert_eq!(root.as_str(), SLUG_TILDE_ONTOLOGY_ROOT);\n+        assert_eq!(root, CanonicalItemUrl::ontology_root());\n+    }\n+\n+    #[test]\n+    fn tilde_ontology_root_unifies_forms() {\n+        assert_eq!(canonicalize_item(\"~/\"), SLUG_TILDE_ONTOLOGY_ROOT);\n+        assert_eq!(\n+            normalize_slug_ontology_storage_url(\"https://slug.social/~/\"),\n+            SLUG_TILDE_ONTOLOGY_ROOT.to_string()\n+        );\n+        assert_eq!(\n+            CanonicalItemUrl::parse(\"https://slug.social/~/\")\n+                .unwrap()\n+                .as_str(),\n+            SLUG_TILDE_ONTOLOGY_ROOT\n+        );\n+        let legacy = CanonicalItemUrl(\"https://slug.social/~/\".to_string());\n+        assert_eq!(legacy.normalized_storage().as_str(), SLUG_TILDE_ONTOLOGY_ROOT);\n+    }\n+\n+    #[test]\n+    fn tilde_http_path_tail_maps_router_segment() {\n+        assert_eq!(\n+            TildeHttpPathTail::new(\"\").to_canonical(),\n+            CanonicalItemUrl::ontology_root()\n+        );\n+        assert_eq!(\n+            tilde_http_path_to_canonical(\"topic/x\").as_str(),\n+            \"https://slug.social/~/topic/x\"\n+        );\n+    }\n+\n+    #[test]\n+    fn display_path_slug_ontology_root() {\n+        let r = CanonicalItemUrl::ontology_root();\n+        assert_eq!(r.display_path(), \"~/\");\n+        assert_eq!(r.tilde_tail(), Some(\"\"));\n     }\n \n     #[test]\n","role":"user"}],"model":"~x-ai/grok-latest"}