constitution · epochs · watch · epoch 3

comparison

c_410d9361a866 (tommy-mor) vs c_c42f908efc44 (tommy-mor)

download prompt · raw event · cmp_b723303ceac93c

council reasoning

~anthropic/claude-sonnet-latest · winner B · 6:4 · permalink

B performs a genuine type-safety refactor, replacing loosely-typed String item paths with CanonicalItemUrl throughout the RPC/validation layer and adding Deref impls to reduce boilerplate, which reduces bug surface and clarifies invariants across the codebase. A adds a real user-facing feature (reddit post rendering with images/links) with decent test coverage, but it's more localized and additive rather than improving the correctness/maintainability of existing core logic; B's changes, while less flashy, touch more fundamental plumbing that lowers future defect risk.

~x-ai/grok-latest · winner A · 2:1 · permalink

A adds lasting product capability: EntityData image_url/link_url, Reddit URL/image parsing with a fixture test, a dedicated render/reddit module (detail cards and list thumbs), and CSS—real domain behavior. B is worthwhile type hygiene (Deref on href newtypes, resolve_item → CanonicalItemUrl, less String wrapping) but mostly mechanical plumbing across API paths without new behavior or bugfixes.

openai/gpt-chat-latest · winner A · 4:1 · permalink

Side A adds substantial end-user functionality by introducing Reddit-specific rendering (thumbnails in ranking lists, full post cards), extending EntityData with image/link metadata, implementing Reddit parsing helpers for those fields, and adding a regression test with a fixture. Side B is primarily a type-safety refactor that changes many APIs from String to CanonicalItemUrl and adds Deref implementations, improving code clarity but with little visible behavioral change compared with A's new capabilities.

sides

A — c_410d9361a866 (tommy-mor)

message

[78964dd7] nice

diff preview

diff --git a/server/src/fetch/html.rs b/server/src/fetch/html.rs
index 9b6c2d0964640a157bca2a6a64cb0820238d8e4f..3e0309ff1c2ac1b17923922d2340ba6710e0f9d1 100644
--- a/server/src/fetch/html.rs
+++ b/server/src/fetch/html.rs
@@ -11,6 +11,9 @@ use crate::{
 };
 
 fn entity_panel(node: &NodeState) -> Markup {
+    if let Some(markup) = crate::render::reddit::entity_markup(node) {
+        return markup;
+    }
     html! {
         @if let Some(data) = &node.data {
             div id="entity-panel" class="entity-card" {
diff --git a/server/src/html/mod.rs b/server/src/html/mod.rs
index e88cc43ddc9d8100f7994be6f5960ec4d8f22c55..3bf9fc7e92e50beed24e2c25106a77421038c90b 100644
--- a/server/src/html/mod.rs
+++ b/server/src/html/mod.rs
@@ -153,16 +153,21 @@ pub fn breadcrumb_path(item: &ItemId) -> Markup {
     }
 }
 
-fn rank_list(label: &str, items: &[RankedItem], start_rank: usize) -> Markup {
+fn rank_list(label: &str, items: &[RankedItem], start_rank: usize, tree: &GlobalTree) -> Markup {
     html! {
         @if !items.is_empty() {
             h3 class="rank-heading muted small" { (label) }
             ol class="rank-list" {
                 @for (i, r) in items.iter().enumerate() {
-                    li {
+                    @let href = item_href(&r.item);
+                    li class=(if crate::render::reddit::is_reddit_post(&r.item) { "reddit-post-row" } else { "" }) {
                         span class="rank-num" { (start_rank + i) ". " }
-                        a href=(item_href(&r.item)) {
-                            strong { (display_label(&r.item)) }
+                        @if let Some(row) = crate::render::reddit::child_row_markup(tree, &r.item, &href) {
+                            (row)
+                        } @else {
+                            a href=(href) {
+                                strong { (display_label(&r.item)) }
+                            }
                         }
                         span class="muted" {
                             " — "
@@ -196,9 +201,14 @@ fn unranked_list(label: &str, items: &[ItemId], tree: &GlobalTree) -> Markup {
             h3 class="rank-heading muted small" { (label) }
             ul class="rank-list unranked" {
                 @for it in items {
-                    li {
-                        a href=(item_href(it)) {
-                            strong { (child_label(tree, it)) }
+                    @let href = item_href(it);
+                    li class=(if crate::render::reddit::is_reddit_post(it) { "reddit-post-row" } else { "" }) {
+                        @if let Some(row) = crate::render::reddit::child_row_markup(tree, it, &href) {
+                            (row)
+                        } @else {
+                            a href=(href) {
+                                strong { (child_label(tree, it)) }
+                            }
                         }
                     }
                 }
@@ -253,7 +263,7 @@ pub fn ranking_panel(item: &ItemId, node: &NodeState, tree: &GlobalTree) -> Mark
             } @else {
                 @for (gi, ranked) in ranked_groups.iter().enumerate() {
                     @let label = if multi { format!("Ranking group {}", gi + 1) } else { "Ranking".to_string() };
-                    (rank_list(&label, ranked, 1))
+                    (rank_list(&label, ranked, 1, tree))
                 }
                 (unranked_list("Unranked", &unranked, tree))
             }
diff --git a/server/src/lib.rs b/server/src/lib.rs
index 0677363e0ed21d244bfa065f7ec728549ddd9e50..da5f3ebecec1794b05a2a69cc78379551b2ad769 100644
--- a/server/src/lib.rs
+++ b/server/src/lib.rs
@@ -8,6 +8,7 @@ pub mod parser;
 pub mod path_types;
 pub mod ranking;
 pub mod reddit;
+pub mod render;
 pub mod reducer;
 pub mod journal;
 pub mod state;
diff --git a/server/src/reddit.rs b/server/src/reddit.rs
index 69d979bc7e4a1cb078f70114dc539bdc1986b574..1168ec2afc77c092514eec91b513bac301cbe225 100644
--- a/server/src/reddit.rs
+++ b/server/src/reddit.rs
@@ -608,6 +608,8 @@ fn parse_subreddit_about(v: &Value) -> Option<crate::reducer::EntityData> {
         author: None,
         body_html,
         thumb_url,
+        image_url: None,
+        link_url: None,
     })
 }
 
@@ -635,15 +637,64 @@ fn parse_post_listing(v: &Value) -> Option<crate::reducer::EntityData> {
         .and_then(|t| t.as_str())
         .filter(|s| s.starts_with("http"))
         .map(|s| s.to_string());
+    let image_url = reddit_post_image_url(child);
+    let link_url = reddit_post_link_url(child);
 
     Some(crate::reducer::EntityData {
         title,
         author,
         body_html,
         thumb_url,
+        image_url,
+        link_url,
     })
 }
 
+fn reddit_post_link_url(data: &Value) -> Option<String> {
+    for key in ["url_overridden_by_dest", "url"] {
+        if let Some(u) = data.get(key).and_then(|v| v.as_str()) {
+            if u.starts_with("http") {
+                return Some(u.to_string());
+            }
+        }
+    }
+    None
+}
+
+/// Full-size still for post detail: direct image `url`, else Reddit preview source.
+fn reddit_post_image_url(data: &Value) -> Option<String> {
+    for key in ["url", "url_overridden_by_dest"] {
+        if let Some(u) = data.get(key).and_then(|v| v.as_str()) {
+            if reddit_direct_image_url(u) {
+                return Some(u.to_string());
+            }
+        }
+    }
+    reddit_preview_source_url(data)
+}
+
+fn reddit_preview_source_url(data: &Value) -> Option<String> {
+    data.pointer("/preview/images/0/source/url")
+        .and_then(|v| v.as_str())
+        .filter(|s| s.starts_with("http"))
+        .map(str::to_string)
+}
+
+fn reddit_direct_image_url(url: &str) -> bool {
+    let u = url.to_ascii_lowercase();
+    if u.contains("redgifs.com") {
+        return false;
+    }
+    u.contains("i.redd.it")
+        || u.contains("preview.redd.it")
+        || u.contains("external-preview.redd.it")
+        || u.ends_with(".jpg")
+        || u.ends_with(".jpeg")
+        || u.ends_with(".png")
+        || u.ends_with(".gif")
+        || u.ends_with(".webp")
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -672,4 +723,20 @@ mod tests {
         .unwrap();
         assert_eq!(entity.title, "The Rust Programming Language");
     }
+
+    #[test]
+    fn parse_post_listing_extracts_thumb_and_full_preview() {
+        let json = include_str!("../../test/fixtures/reddit/post_preview.json");
+        let v: Value = serde_json::from_str(json).unwrap();
+        let id = ItemId::parse("reddit.com/r/nsfw/comments/1tpy6a1/angel_eyes").unwrap();
+        let entity = entity_view_from_payload(&id, &v).unwrap();
+        assert_eq!(entity.title, "Angel Eyes");
+        assert!(entity.thumb_url.as_ref().unwrap().contains("width=140"));
+        assert!(entity.image_url.as_ref().unwrap().contains("auto=webp"));
+        assert!(!entity.image_url.as_ref().unwrap().contains("redgifs"));
+        assert_eq!(
+            entity.link_url.as_deref(),
+            Some("http://v3.redgifs.com/watch/impossibleprestigioushedgehog")
+        );
+    }
 }
diff --git a/server/src/reducer.rs b/server/src/reducer.rs
index 4e42d0369dab50bb2f8ca664aa69b628292f6c07..336e78b77d3ab59361b89af5c9868e13da4ac962 100644
--- a/server/src/reducer.rs
+++ b/server/src/reducer.rs
@@ -122,7 +122,12 @@ pub struct EntityData {
     pub title: String,
     pub author: Option<String>,
     pub body_html: Option<String>,
+    /// Small preview (subreddit listing / child rows).
     pub thumb_url: Option<String>,
+    /// Full-size still image for the post detail view.
+    pub image_url: Option<String>,
+    /// Outbound link for link/video posts (`url` / `url_overridden_by_dest`).
+    pub link_url: Option<String>,
 }
 
 /// One node in the fractal tree: entity + ranked children.
diff --git a/server/src/render/mod.rs b/server/src/render/mod.rs
new file mode 100644
index 0000000000000000000000000000000000000000..c2c41404abe01c671139658fcccdeced5be388e4
--- /dev/null
+++ b/server/src/render/mod.rs
@@ -0,0 +1,3 @@
+//! Domain-specific HTML fragments for imported entities.
+
+pub mod reddit;
diff --git a/server/src/render/reddit.rs b/server/src/render/reddit.rs
new file mode 100644
index 0000000000000000000000000000000000000000..4a18de93cf57d8395ded3caa373a708f39b3f43f
--- /dev/null
+++ b/server/src/render/reddit.rs
@@ -0,0 +1,64 @@
+//! Reddit post cards: thumbnail in child lists, full image on the post page.
+
+use maud::{html, Markup};
+
+use crate::{
+    path_types::ItemId,
+    reducer::{EntityData, GlobalTree, NodeState},
+};
+
+pub fn is_reddit_post(id: &ItemId) -> bool {
+    id.as_str().starts_with("reddit.com/") && id.as_str().contains("/comments/")
+}
+
+/// Post detail card (`#entity-panel`).
+pub fn entity_markup(node: &NodeState) -> Option<Markup> {
+    if !is_reddit_post(&node.id) {
+        return None;
+    }
+    let data = node.data.as_ref()?;
+    Some(post_entity_card(data))
+}
+
+/// One row in a parent ranking list (thumbnail + title).
+pub fn child_row_markup(tree: &GlobalTree, id: &ItemId, href: &str) -> Option<Markup> {
+    if !is_reddit_post(id) {
+        return None;
+    }
+    let data = tree.get(id)?.data.as_ref()?;
+    Some(html! {
+        @if let Some(thumb) = &data.thumb_url {
+            a class="reddit-post-thumb-link" href=(href) {
+                img class="reddit-post-thumb" src=(thumb) alt="" loading="lazy";
+            }
+        }
+        a href=(href) {
+            strong { (data.title) }
+        }
+    })
+}
+
+fn post_entity_card(data: &EntityData) -> Markup {
+    let image = data.image_url.as_ref().or(data.thumb_url.as_ref());
+    html! {
+        div id="entity-panel" class="entity-card reddit-post" {
+            h2 { (data.title) }
+            @if let Some(author) = &data.author {
+                p class="muted small" { "by " (author) }
+            }
+            @if let Some(url) = &data.link_url {
+                p class="reddit-post-url muted small" {
+                    a href=(url) rel="noopener noreferrer" { (url) }
+                }
+            }
+            @if let Some(src) = image {
+                figure class="reddit-post-figure" {
+                    img class="reddit-post-image" src=(src) alt="" loading="lazy";
+                }
+            }
+            @if let Some(body) = &data.body_html {
+                div class="entity-body" { (maud::PreEscaped(body)) }
+            }
+        }
+    }
+}
diff --git a/server/static/sorter.css b/server/static/sorter.css
index 1f9f5158414902d43a380dd899232c70d8cf5d63..021918f8e778b84e4b3eac8559fab7d223a3d490 100644
--- a/server/static/sorter.css
+++ b/server/static/sorter.css
@@ -171,6 +171,41 @@ code {
   margin-top: 0;
 }
 
+.reddit-post-row {
+  display: flex;
+  align-items: center;
+  gap: 0.6rem;
+}
+
+.reddit-post-thumb-link {
+  flex-shrink: 0;
+  line-height: 0;
+}
+
+.reddit-post-thumb {
+  width: 64px;
+  height: 64px;
+  object-fit: cover;
+  border-radius: 4px;
+  border: 1px solid var(--border);
+}
+
+.reddit-post-url a {
+  word-break: break-all;
+}
+
+.reddit-post-figure {
+  margin: 0.75rem 0;
+}
+
+.reddit-post-image {
+  display: block;
+  max-width: 100%;
+  height: auto;
+  border-radius: 6px;
+  border: 1px solid var(--border);
+}
+
 .scope-name {
   color: var(--accent);
   font-weight: 600;
diff --git a/test/fixtures/reddit/post_preview.json b/test/fixtures/reddit/post_preview.json
new file mode 100644
index 0000000000000000000000000000000000000000..c6ed31ae397dc0f7b6e07e5e010e617df78d9c18
--- /dev/null
+++ b/test/fixtures/reddit/post_preview.json
@@ -0,0 +1,22 @@
+{
+  "kind": "t3",
+  "data": {
+    "title": "Angel Eyes",
+    "permalink": "/r/nsfw/comments/1tpy6a1/angel_eyes/",
+    "author": "alice",
+    "thumbnail": "https://external-preview.redd.it/Kb6Nf5Q4RAucat-2RFcYMeQb2d6vgYNo5EPlf6kGLbs.jpeg?width=140&height=140&auto=webp&s=d7238240ebf191b954ef5f42b0cf61b67aecec88",
+    "url": "http://v3.red

… preview truncated; 410 characters omitted

download full diff A

B — c_c42f908efc44 (tommy-mor)

message

[674964ef] refactor: Deref for href newtypes, CanonicalItemUrl through resolve_item

- Implement Deref<Target=str> for GardenItemUrl, ForumThreadUrl, TildeOntologyPath
- resolve_item returns CanonicalItemUrl; validate uses HashSet<CanonicalItemUrl>
- compute_scope_rank_changes keys are CanonicalItemUrl; pair RPC uses Vec pool
- pick_random_distinct_canonical; connectivity stats on &[CanonicalItemUrl]
- Global rank unranked uses stored ids before GardenItemUrl mapping

Made-with: Cursor

diff preview

diff --git a/server/src/api/helpers.rs b/server/src/api/helpers.rs
index 03b3e77911ccd662bec8635345dafe2593cf242e..1b291db83df7364a026f2e147e0a29a70a399371 100644
--- a/server/src/api/helpers.rs
+++ b/server/src/api/helpers.rs
@@ -30,13 +30,13 @@ pub fn now_ms() -> i64 {
     t.as_millis() as i64
 }
 
-/// Resolve an item path as a first-class canonical path.
-pub fn resolve_item(item: &str) -> Result<String, String> {
+/// Resolve DSL/user input to a stored canonical item id.
+pub fn resolve_item(item: &str) -> Result<CanonicalItemUrl, String> {
     let canonical = canonicalize_item(item);
     if canonical.is_empty() {
         return Err(format!("empty item path: `{}`", item));
     }
-    Ok(canonical)
+    Ok(CanonicalItemUrl(canonical))
 }
 
 pub fn parse_parent_specs(parent: Option<&String>) -> Vec<String> {
@@ -94,7 +94,7 @@ pub fn paginate_rankings(
     (out_components, out_unranked)
 }
 
-pub fn pick_random_distinct(items: &[String]) -> Option<(String, String)> {
+pub fn pick_random_distinct_canonical(items: &[CanonicalItemUrl]) -> Option<(CanonicalItemUrl, CanonicalItemUrl)> {
     use rand::seq::SliceRandom;
     if items.len() < 2 {
         return None;
@@ -123,15 +123,12 @@ pub fn is_pair_voted(group: &crate::reducer::GroupState, a: &str, b: &str) -> bo
     group.voted_pairs.contains(&(i, j))
 }
 
-pub fn compute_connectivity_stats(group: &crate::reducer::GroupState, pool: &[String]) -> ConnectivityStats {
+pub fn compute_connectivity_stats(group: &crate::reducer::GroupState, pool: &[CanonicalItemUrl]) -> ConnectivityStats {
     let n = pool.len();
 
     let global_idxs: Vec<Option<usize>> = pool
         .iter()
-        .map(|it| {
-            let key = CanonicalItemUrl(it.clone());
-            group.item_to_idx.get(&key).copied()
-        })
+        .map(|it| group.item_to_idx.get(it).copied())
         .collect();
     let present: Vec<usize> = global_idxs.iter().filter_map(|x| *x).collect();
 
diff --git a/server/src/api/mod.rs b/server/src/api/mod.rs
index cf22cb0129366c3aed031bc86f3197a4321cb806..a10ce662105cff8fad949c6b83f7035ce79bed18 100644
--- a/server/src/api/mod.rs
+++ b/server/src/api/mod.rs
@@ -24,7 +24,7 @@ pub use auth::{
 
 pub use helpers::{
     api_error, compute_connectivity_stats, is_pair_voted, now_ms, paginate_rankings,
-    parse_parent_specs, pick_random_distinct, resolve_item, sha256_hex, vote_touches_path,
+    parse_parent_specs, pick_random_distinct_canonical, resolve_item, sha256_hex, vote_touches_path,
 };
 
 pub use rpc::handle_rpc_batch;
diff --git a/server/src/api/rpc.rs b/server/src/api/rpc.rs
index 5f7d50188f1381267402f2e57e671234ef5db2fd..de0955d0887d32740e1fd18365205c5bdb53c247 100644
--- a/server/src/api/rpc.rs
+++ b/server/src/api/rpc.rs
@@ -29,7 +29,7 @@ use crate::{
 use super::auth::verify_bearer_principal;
 use super::helpers::{
     compute_connectivity_stats, is_pair_voted, now_ms, paginate_rankings, parse_parent_specs,
-    pick_random_distinct, resolve_item, vote_touches_path,
+    pick_random_distinct_canonical, resolve_item, vote_touches_path,
 };
 use super::validate::{normalize_room_and_thread, validate_ingest_document};
 
@@ -146,21 +146,21 @@ fn authorize_room_read(reduced: &ReducerState, headers: &HeaderMap, room: &str)
 }
 
 fn compute_scope_rank_changes(
-    parent: &str,
+    parent: &CanonicalItemUrl,
     before: &crate::scope_rank::ChildrenRankings,
     after: &crate::scope_rank::ChildrenRankings,
     room_wire: &str,
 ) -> Option<ScopeRankChanges> {
-    fn build_positions(rankings: &crate::scope_rank::ChildrenRankings) -> HashMap<String, Option<RankPosition>> {
+    fn build_positions(rankings: &crate::scope_rank::ChildrenRankings) -> HashMap<CanonicalItemUrl, Option<RankPosition>> {
         let mut map = HashMap::new();
         for comp in &rankings.component_rankings {
             let total = comp.ranked.len();
             for (i, item) in comp.ranked.iter().enumerate() {
-                map.insert(item.item.as_str().to_string(), Some(RankPosition { rank: i + 1, of: total }));
+                map.insert(item.item.clone(), Some(RankPosition { rank: i + 1, of: total }));
             }
         }
         for item in &rankings.unranked_items {
-            map.insert(item.as_str().to_string(), None);
+            map.insert(item.clone(), None);
         }
         map
     }
@@ -168,7 +168,7 @@ fn compute_scope_rank_changes(
     let before_pos = build_positions(before);
     let after_pos = build_positions(after);
 
-    let all_items: std::collections::BTreeSet<String> = before_pos.keys().cloned()
+    let all_items: std::collections::BTreeSet<CanonicalItemUrl> = before_pos.keys().cloned()
         .chain(after_pos.keys().cloned())
         .collect();
 
@@ -184,7 +184,7 @@ fn compute_scope_rank_changes(
         };
         if changed {
             changes.push(RankChange {
-                item: GardenItemUrl::from_storage_str(&item, room_wire),
+                item: GardenItemUrl::from_stored(&item, room_wire),
                 before: b,
                 after: a,
             });
@@ -203,11 +203,7 @@ fn compute_scope_rank_changes(
     });
 
     Some(ScopeRankChanges {
-        parent: if parent.is_empty() {
-            "/".to_string()
-        } else {
-            GardenItemUrl::from_storage_str(parent, room_wire).into_inner()
-        },
+        parent: GardenItemUrl::from_stored(parent, room_wire).into_inner(),
         changes,
     })
 }
@@ -473,8 +469,8 @@ async fn rpc_post(
         for s in &v.doc.statements {
             if let dsl::Stmt::Vote { item1, item2, .. } = s {
                 if let (Ok(a), Ok(b)) = (resolve_item(item1), resolve_item(item2)) {
-                    if let Some(p) = CanonicalItemUrl::parse(&a).and_then(|c| c.parent()) { parents.insert(p); }
-                    if let Some(p) = CanonicalItemUrl::parse(&b).and_then(|c| c.parent()) { parents.insert(p); }
+                    if let Some(p) = a.parent() { parents.insert(p); }
+                    if let Some(p) = b.parent() { parents.insert(p); }
                 }
             }
         }
@@ -525,7 +521,7 @@ async fn rpc_post(
             .filter_map(|p| {
                 let before = pre_rankings.get(p)?;
                 let after = crate::scope_rank::build_children_rankings(content, p);
-                compute_scope_rank_changes(p.as_str(), before, &after, &room_key)
+                compute_scope_rank_changes(p, before, &after, &room_key)
             })
             .collect();
         if v.is_empty() { None } else { Some(v) }
@@ -638,8 +634,8 @@ async fn rpc_check(
         for s in &v.doc.statements {
             if let dsl::Stmt::Vote { item1, item2, .. } = s {
                 if let (Ok(a), Ok(b)) = (resolve_item(item1), resolve_item(item2)) {
-                    if let Some(p) = CanonicalItemUrl::parse(&a).and_then(|c| c.parent()) { parents.insert(p); }
-                    if let Some(p) = CanonicalItemUrl::parse(&b).and_then(|c| c.parent()) { parents.insert(p); }
+                    if let Some(p) = a.parent() { parents.insert(p); }
+                    if let Some(p) = b.parent() { parents.insert(p); }
                 }
             }
         }
@@ -961,7 +957,7 @@ fn rpc_search(reduced: &ReducerState, q: &str, limit: usize, principal: Option<&
 async fn rpc_get_pair(state: &AppState, room: String, parent_path: String) -> Result<RpcResult, RpcErr> {
     let scope = scope_from_room_wire(&room);
     let reduced_arc = state.reduced.clone();
-    let pool: Vec<String> = {
+    let pool: Vec<CanonicalItemUrl> = {
         let reduced = reduced_arc.read().await;
         let content = content_for_room(&reduced, &room);
         let tmp = if parent_path.trim().is_empty() {
@@ -970,12 +966,11 @@ async fn rpc_get_pair(state: &AppState, room: String, parent_path: String) -> Re
             Some(parent_path.clone())
         };
         let specs = parse_parent_specs(tmp.as_ref());
-        let raw_pool: Vec<CanonicalItemUrl> = if specs.is_empty() {
+        if specs.is_empty() {
             content.ranking_group.idx_to_item.clone()
         } else {
             crate::scope_rank::resolve_scope(content, &specs)
-        };
-        raw_pool.into_iter().map(|it| it.0).collect()
+        }
     };
     if pool.len() < 2 {
         return Err((
@@ -983,31 +978,30 @@ async fn rpc_get_pair(state: &AppState, room: String, parent_path: String) -> Re
             Some("add items via ingest".into()),
         ));
     }
-    let selected: Option<(String, String)> = {
+    let selected: Option<(CanonicalItemUrl, CanonicalItemUrl)> = {
         let mut reduced = reduced_arc.write().await;
         let content = reduced.content.entry(scope.clone()).or_default();
         let group = &mut content.ranking_group;
         if group.idx_to_item.is_empty() {
-            pick_random_distinct(&pool)
+            pick_random_distinct_canonical(&pool)
         } else {
             let mut rng = rand::thread_rng();
-            let idxs: Vec<usize> = pool.iter()
-                .filter_map(|it| {
-                    let key = CanonicalItemUrl(it.clone());
-                    group.item_to_idx.get(&key).copied()
-                })
+            let idxs: Vec<usize> = pool
+                .iter()
+                .filter_map(|it| group.item_to_idx.get(it).copied())
                 .collect();
             let ranked = ranked_items_subset(group, &idxs, 10000, 1e-8);
-            let ranked_set: HashSet<String> = ranked.iter().map(|r| r.item.as_str().to_string()).collect();
-            let unsorted: Vec<String> = pool.iter()
+            let ranked_set: HashSet<CanonicalItemUrl> = ranked.iter().map(|r| r.item.clone()).collect();
+            let unsorted: Vec<CanonicalItemUrl> = pool
+                .iter()
                 .filter(|it| !ranked_set.contains(*it))
                 .cloned()
                 .collect();
-            let mut pick: Option<(String, String)> = None;
+            let mut pick: Option<(CanonicalItemUrl, CanonicalItemUrl)> = None;
             if !unsorted.is_empty() {
                 if let Some(left) = unsorted.choose(&mut rng).cloned() {
-                    let mut candidates: Vec<String> = if !ranked.is_empty() {
-                        ranked.iter().map(|r| r.item.as_str().to_string()).collect()
+                    let mut candidates: Vec<CanonicalItemUrl> = if !ranked.is_empty() {
+                        ranked.iter().map(|r| r.item.clone()).collect()
                     } else {
                         pool.clone()
                     };
@@ -1021,21 +1015,21 @@ async fn rpc_get_pair(state: &AppState, room: String, parent_path: String) -> Re
                     let a = ranked[i].item.as_str();
                     let b = ranked[i + 1].item.as_str();
                     if a != b && !is_pair_voted(group, a, b) {
-                        pick = Some((a.to_string(), b.to_string()));
+                        pick = Some((ranked[i].item.clone(), ranked[i + 1].item.clone()));
                         break;
                     }
                 }
                 if pick.is_none() {
                     for _ in 0..64 {
                         let (Some(a), Some(b)) = (pool.choose(&mut rng).cloned(), pool.choose(&mut rng).cloned()) else { break; };
-                        if a != b && !is_pair_voted(group, &a, &b) {
+                        if a != b && !is_pair_voted(group, a.as_str(), b.as_str()) {
                             pick = Some((a, b));
                             break;
                         }
                     }
                 }
             }
-            pick.or_else(|| pick_random_distinct(&pool))
+            pick.or_else(|| pick_random_distinct_canonical(&pool))
         }
     };
     let Some((left, right)) = selected else {
@@ -1043,8 +1037,8 @@ async fn rpc_get_pair(state: &AppState, room: String, parent_path: String) -> Re
     };
     let reduced = reduced_arc.read().await;
     let content = content_for_ro

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