{"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[bf118bdf] Sanitize Reddit entity body HTML before rendering.\n\nUse ammonia at render time so untrusted selftext_html cannot execute scripts in our origin.\n\nCo-authored-by: Cursor <cursoragent@cursor.com>\n\nSide A — unified diff (full patch):\ndiff --git a/Cargo.lock b/Cargo.lock\nindex 3dec7cb72a182dc654a37dca8ba0b49d77504daa..0dd4fce5fb6400ae153cca4e3dbf5a5158e6d8b4 100644\n--- a/Cargo.lock\n+++ b/Cargo.lock\n@@ -11,6 +11,19 @@ dependencies = [\n  \"memchr\",\n ]\n \n+[[package]]\n+name = \"ammonia\"\n+version = \"4.1.2\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"17e913097e1a2124b46746c980134e8c954bc17a6a59bb3fde96f088d126dde6\"\n+dependencies = [\n+ \"cssparser\",\n+ \"html5ever\",\n+ \"maplit\",\n+ \"tendril\",\n+ \"url\",\n+]\n+\n [[package]]\n name = \"anyhow\"\n version = \"1.0.102\"\n@@ -355,6 +368,29 @@ version = \"0.2.4\"\n source = \"registry+https://github.com/rust-lang/crates.io-index\"\n checksum = \"460fbee9c2c2f33933d720630a6a0bac33ba7053db5344fac858d4b8952d77d5\"\n \n+[[package]]\n+name = \"cssparser\"\n+version = \"0.35.0\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"4e901edd733a1472f944a45116df3f846f54d37e67e68640ac8bb69689aca2aa\"\n+dependencies = [\n+ \"cssparser-macros\",\n+ \"dtoa-short\",\n+ \"itoa\",\n+ \"phf\",\n+ \"smallvec\",\n+]\n+\n+[[package]]\n+name = \"cssparser-macros\"\n+version = \"0.6.1\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"13b588ba4ac1a99f7f2964d24b3d896ddc6bf847ee3855dbd4366f058cfcd331\"\n+dependencies = [\n+ \"quote\",\n+ \"syn\",\n+]\n+\n [[package]]\n name = \"deranged\"\n version = \"0.5.8\"\n@@ -381,6 +417,21 @@ version = \"0.15.7\"\n source = \"registry+https://github.com/rust-lang/crates.io-index\"\n checksum = \"1aaf95b3e5c8f23aa320147307562d361db0ae0d51242340f558153b4eb2439b\"\n \n+[[package]]\n+name = \"dtoa\"\n+version = \"1.0.11\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"4c3cf4824e2d5f025c7b531afcb2325364084a16806f6d47fbc1f5fbd9960590\"\n+\n+[[package]]\n+name = \"dtoa-short\"\n+version = \"0.3.5\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"cd1511a7b6a56299bd043a9c167a6d2bfb37bf84a6dfceaba651168adfb43c87\"\n+dependencies = [\n+ \"dtoa\",\n+]\n+\n [[package]]\n name = \"durable\"\n version = \"0.2.0\"\n@@ -482,6 +533,16 @@ dependencies = [\n  \"percent-encoding\",\n ]\n \n+[[package]]\n+name = \"futf\"\n+version = \"0.1.5\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"df420e2e84819663797d1ec6544b13c5be84629e7bb00dc960d6917db2987843\"\n+dependencies = [\n+ \"mac\",\n+ \"new_debug_unreachable\",\n+]\n+\n [[package]]\n name = \"futures-channel\"\n version = \"0.3.32\"\n@@ -614,6 +675,17 @@ version = \"0.5.0\"\n source = \"registry+https://github.com/rust-lang/crates.io-index\"\n checksum = \"2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea\"\n \n+[[package]]\n+name = \"html5ever\"\n+version = \"0.35.0\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"55d958c2f74b664487a2035fe1dadb032c48718a03b63f3ab0b8537db8549ed4\"\n+dependencies = [\n+ \"log\",\n+ \"markup5ever\",\n+ \"match_token\",\n+]\n+\n [[package]]\n name = \"http\"\n version = \"1.4.1\"\n@@ -974,6 +1046,15 @@ version = \"0.8.2\"\n source = \"registry+https://github.com/rust-lang/crates.io-index\"\n checksum = \"92daf443525c4cce67b150400bc2316076100ce0b3686209eb8cf3c31612e6f0\"\n \n+[[package]]\n+name = \"lock_api\"\n+version = \"0.4.14\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"224399e74b87b5f3557511d98dff8b14089b3dadafcab6bb93eab67d3aace965\"\n+dependencies = [\n+ \"scopeguard\",\n+]\n+\n [[package]]\n name = \"log\"\n version = \"0.4.30\"\n@@ -990,6 +1071,40 @@ dependencies = [\n  \"libc\",\n ]\n \n+[[package]]\n+name = \"mac\"\n+version = \"0.1.1\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"c41e0c4fef86961ac6d6f8a82609f55f31b05e4fce149ac5710e439df7619ba4\"\n+\n+[[package]]\n+name = \"maplit\"\n+version = \"1.0.2\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"3e2e65a1a2e43cfcb47a895c4c8b10d1f4a61097f9f254f183aee60cad9c651d\"\n+\n+[[package]]\n+name = \"markup5ever\"\n+version = \"0.35.0\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"311fe69c934650f8f19652b3946075f0fc41ad8757dbb68f1ca14e7900ecc1c3\"\n+dependencies = [\n+ \"log\",\n+ \"tendril\",\n+ \"web_atoms\",\n+]\n+\n+[[package]]\n+name = \"match_token\"\n+version = \"0.35.0\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"ac84fd3f360fcc43dc5f5d186f02a94192761a080e8bc58621ad4d12296a58cf\"\n+dependencies = [\n+ \"proc-macro2\",\n+ \"quote\",\n+ \"syn\",\n+]\n+\n [[package]]\n name = \"matchers\"\n version = \"0.2.0\"\n@@ -1092,6 +1207,12 @@ dependencies = [\n  \"tempfile\",\n ]\n \n+[[package]]\n+name = \"new_debug_unreachable\"\n+version = \"1.0.6\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"650eef8c711430f1a879fdd01d4745a7deea475becfb90269c06775983bbf086\"\n+\n [[package]]\n name = \"nom\"\n version = \"7.1.3\"\n@@ -1175,6 +1296,29 @@ dependencies = [\n  \"vcpkg\",\n ]\n \n+[[package]]\n+name = \"parking_lot\"\n+version = \"0.12.5\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"93857453250e3077bd71ff98b6a65ea6621a19bb0f559a85248955ac12c45a1a\"\n+dependencies = [\n+ \"lock_api\",\n+ \"parking_lot_core\",\n+]\n+\n+[[package]]\n+name = \"parking_lot_core\"\n+version = \"0.9.12\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"2621685985a2ebf1c516881c026032ac7deafcda1a2c9b7850dc81e3dfcb64c1\"\n+dependencies = [\n+ \"cfg-if\",\n+ \"libc\",\n+ \"redox_syscall\",\n+ \"smallvec\",\n+ \"windows-link\",\n+]\n+\n [[package]]\n name = \"peeking_take_while\"\n version = \"0.1.2\"\n@@ -1187,6 +1331,58 @@ version = \"2.3.2\"\n source = \"registry+https://github.com/rust-lang/crates.io-index\"\n checksum = \"9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220\"\n \n+[[package]]\n+name = \"phf\"\n+version = \"0.11.3\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"1fd6780a80ae0c52cc120a26a1a42c1ae51b247a253e4e06113d23d2c2edd078\"\n+dependencies = [\n+ \"phf_macros\",\n+ \"phf_shared\",\n+]\n+\n+[[package]]\n+name = \"phf_codegen\"\n+version = \"0.11.3\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"aef8048c789fa5e851558d709946d6d79a8ff88c0440c587967f8e94bfb1216a\"\n+dependencies = [\n+ \"phf_generator\",\n+ \"phf_shared\",\n+]\n+\n+[[package]]\n+name = \"phf_generator\"\n+version = \"0.11.3\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"3c80231409c20246a13fddb31776fb942c38553c51e871f8cbd687a4cfb5843d\"\n+dependencies = [\n+ \"phf_shared\",\n+ \"rand 0.8.6\",\n+]\n+\n+[[package]]\n+name = \"phf_macros\"\n+version = \"0.11.3\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"f84ac04429c13a7ff43785d75ad27569f2951ce0ffd30a3321230db2fc727216\"\n+dependencies = [\n+ \"phf_generator\",\n+ \"phf_shared\",\n+ \"proc-macro2\",\n+ \"quote\",\n+ \"syn\",\n+]\n+\n+[[package]]\n+name = \"phf_shared\"\n+version = \"0.11.3\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"67eabc2ef2a60eb7faa00097bd1ffdb5bd28e62bf39990626a582201b7a754e5\"\n+dependencies = [\n+ \"siphasher\",\n+]\n+\n [[package]]\n name = \"pin-project-lite\"\n version = \"0.2.17\"\n@@ -1223,6 +1419,12 @@ dependencies = [\n  \"zerocopy\",\n ]\n \n+[[package]]\n+name = \"precomputed-hash\"\n+version = \"0.1.1\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c\"\n+\n [[package]]\n name = \"prettyplease\"\n version = \"0.2.37\"\n@@ -1379,6 +1581,15 @@ dependencies = [\n  \"rand_core 0.9.5\",\n ]\n \n+[[package]]\n+name = \"redox_syscall\"\n+version = \"0.5.18\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"ed2bf2547551a7053d6fdfafda3f938979645c44812fbfcda098faae3f1a362d\"\n+dependencies = [\n+ \"bitflags 2.11.1\",\n+]\n+\n [[package]]\n name = \"regex\"\n version = \"1.12.3\"\n@@ -1563,6 +1774,12 @@ dependencies = [\n  \"windows-sys 0.61.2\",\n ]\n \n+[[package]]\n+name = \"scopeguard\"\n+version = \"1.2.0\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49\"\n+\n [[package]]\n name = \"security-framework\"\n version = \"3.7.0\"\n@@ -1683,6 +1900,12 @@ dependencies = [\n  \"libc\",\n ]\n \n+[[package]]\n+name = \"siphasher\"\n+version = \"1.0.3\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"8ee5873ec9cce0195efcb7a4e9507a04cd49aec9c83d0389df45b1ef7ba2e649\"\n+\n [[package]]\n name = \"slab\"\n version = \"0.4.12\"\n@@ -1709,6 +1932,7 @@ dependencies = [\n name = \"sorter2-server\"\n version = \"0.0.1\"\n dependencies = [\n+ \"ammonia\",\n  \"async-stream\",\n  \"axum\",\n  \"axum-extra\",\n@@ -1742,6 +1966,31 @@ version = \"1.2.1\"\n source = \"registry+https://github.com/rust-lang/crates.io-index\"\n checksum = \"6ce2be8dc25455e1f91df71bfa12ad37d7af1092ae736f3a6cd0e37bc7810596\"\n \n+[[package]]\n+name = \"string_cache\"\n+version = \"0.8.9\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"bf776ba3fa74f83bf4b63c3dcbbf82173db2632ed8452cb2d891d33f459de70f\"\n+dependencies = [\n+ \"new_debug_unreachable\",\n+ \"parking_lot\",\n+ \"phf_shared\",\n+ \"precomputed-hash\",\n+ \"serde\",\n+]\n+\n+[[package]]\n+name = \"string_cache_codegen\"\n+version = \"0.5.4\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"c711928715f1fe0fe509c53b43e993a9a557babc2d0a3567d0a3006f1ac931a0\"\n+dependencies = [\n+ \"phf_generator\",\n+ \"phf_shared\",\n+ \"proc-macro2\",\n+ \"quote\",\n+]\n+\n [[package]]\n name = \"subtle\"\n version = \"2.6.1\"\n@@ -1813,6 +2062,17 @@ dependencies = [\n  \"windows-sys 0.61.2\",\n ]\n \n+[[package]]\n+name = \"tendril\"\n+version = \"0.4.3\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"d24a120c5fc464a3458240ee02c299ebcb9d67b5249c8848b09d639dca8d7bb0\"\n+dependencies = [\n+ \"futf\",\n+ \"mac\",\n+ \"utf-8\",\n+]\n+\n [[package]]\n name = \"thiserror\"\n version = \"1.0.69\"\n@@ -2116,6 +2376,12 @@ version = \"2.1.3\"\n source = \"registry+https://github.com/rust-lang/crates.io-index\"\n checksum = \"daf8dba3b7eb870caf1ddeed7bc9d2a049f3cfdfae7cb521b087cc33ae4c49da\"\n \n+[[package]]\n+name = \"utf-8\"\n+version = \"0.7.6\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"09cc8ee72d2a9becf2f2febe0205bbed8fc6615b7cb429ad062dc7b7ddd036a9\"\n+\n [[package]]\n name = \"utf8_iter\"\n version = \"1.0.4\"\n@@ -2281,6 +2547,18 @@ dependencies = [\n  \"wasm-bindgen\",\n ]\n \n+[[package]]\n+name = \"web_atoms\"\n+version = \"0.1.3\"\n+source = \"registry+https://github.com/rust-lang/crates.io-index\"\n+checksum = \"57ffde1dc01240bdf9992e3205668b235e59421fd085e8a317ed98da0178d414\"\n+dependencies = [\n+ \"phf\",\n+ \"phf_codegen\",\n+ \"string_cache\",\n+ \"string_cache_codegen\",\n+]\n+\n [[package]]\n name = \"windows-link\"\n version = \"0.2.1\"\ndiff --git a/server/Cargo.toml b/server/Cargo.toml\nindex 47659ff82fbfb50972eb2b87575e80f66e572ba4..27f552c20b97ef28cdde4cb6b1a4980375135111 100644\n--- a/server/Cargo.toml\n+++ b/server/Cargo.toml\n@@ -13,6 +13,7 @@ serde = { version = \"1\", features = [\"derive\"] }\n serde_json = \"1\"\n thiserror = \"1\"\n maud = { version = \"0.26\", features = [\"axum\"] }\n+ammonia = \"4.1\"\n tower = \"0.5\"\n tower-http = { version = \"0.5\", features = [\"trace\"] }\n tracing = \"0.1\"\ndiff --git a/server/src/fetch/html.rs b/server/src/fetch/html.rs\nindex dadf050515f0473943dad97df5d318032c8cb385..5b160c6b8bd216dfaf80149854aec0566cd00460 100644\n--- a/server/src/fetch/html.rs\n+++ b/server/src/fetch/html.rs\n@@ -4,6 +4,7 @@ use maud::{html, Markup};\n \n use crate::{\n     form_template::template_json_compact,\n+    html::sanitize::entity_body_html,\n     path_types::ItemId,\n     reddit::{is_children_fetchable, is_fetchable},\n     reducer::NodeState,\n@@ -27,7 +28,7 @@ pub fn entity_panel(node: &NodeState) -> Markup {\n                     p class=\"muted small\" { \"by \" (author) }\n                 }\n                 @if let Some(body) = &data.body_html {\n-                    div class=\"entity-body\" { (maud::PreEscaped(body)) }\n+                    div class=\"entity-body\" { (maud::PreEscaped(entity_body_html(body))) }\n                 }\n             }\n         }\ndiff --git a/server/src/html/mod.rs b/server/src/html/mod.rs\nindex e180a0ca542a33e2300c0a4809e6b9cfee07ecfe..a58cbbee3490a08a625cb06df06848c59a615d65 100644\n--- a/server/src/html/mod.rs\n+++ b/server/src/html/mod.rs\n@@ -20,6 +20,7 @@ use crate::{\n     ui_action::UI_RPC_FIELD,\n };\n \n+pub mod sanitize;\n pub mod vote;\n \n const SORTER_CSS: &str = include_str!(\"../../static/sorter.css\");\ndiff --git a/server/src/html/sanitize.rs b/server/src/html/sanitize.rs\nnew file mode 100644\nindex 0000000000000000000000000000000000000000..6685ed2535281b9fd5d65b042cbc5a11c5d4df37\n--- /dev/null\n+++ b/server/src/html/sanitize.rs\n@@ -0,0 +1,39 @@\n+//! Whitelist sanitization for untrusted HTML fragments (e.g. Reddit `selftext_html`).\n+\n+use std::sync::LazyLock;\n+\n+use ammonia::Builder;\n+\n+static ENTITY_BODY: LazyLock<Builder<'static>> = LazyLock::new(|| {\n+    let mut b = Builder::default();\n+    b.strip_comments(true);\n+    b.link_rel(Some(\"noopener noreferrer\"));\n+    b\n+});\n+\n+/// Sanitize HTML safe for embedding in our pages via [`maud::PreEscaped`].\n+pub fn entity_body_html(raw: &str) -> String {\n+    ENTITY_BODY.clean(raw).to_string()\n+}\n+\n+#[cfg(test)]\n+mod tests {\n+    use super::entity_body_html;\n+\n+    #[test]\n+    fn keeps_benign_markup() {\n+        assert_eq!(\n+            entity_body_html(\"<p>release notes</p>\"),\n+            \"<p>release notes</p>\"\n+        );\n+    }\n+\n+    #[test]\n+    fn strips_scripts_and_event_handlers() {\n+        let raw = \"<p>ok</p><script>alert(1)</script><img src=x onerror=alert(1)>\";\n+        let clean = entity_body_html(raw);\n+        assert!(!clean.contains(\"<script\"));\n+        assert!(!clean.contains(\"onerror\"));\n+        assert!(clean.contains(\"<p>ok</p>\"));\n+    }\n+}\ndiff --git a/server/src/render/reddit.rs b/server/src/render/reddit.rs\nindex c4f98fc760c32ce1b41a91bd41e97908bd198937..7f840aa33b734a31d8cf3341a0581c8bcb9bbcf3 100644\n--- a/server/src/render/reddit.rs\n+++ b/server/src/render/reddit.rs\n@@ -3,6 +3,7 @@\n use maud::{html, Markup};\n \n use crate::{\n+    html::sanitize::entity_body_html,\n     path_types::ItemId,\n     reducer::{EntityData, GlobalTree, NodeState},\n };\n@@ -57,7 +58,7 @@ fn post_entity_card(data: &EntityData) -> Markup {\n                 }\n             }\n             @if let Some(body) = &data.body_html {\n-                div class=\"entity-body\" { (maud::PreEscaped(body)) }\n+                div class=\"entity-body\" { (maud::PreEscaped(entity_body_html(body))) }\n             }\n         }\n     }\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"}