You are a constitutional council ranking individual git commits for ownership allocation.

Compare these two commits. Decide which contributed more lasting value to the project.

Judge substance, not spectacle:
- Prefer correct, lasting design and real bugfixes over churn, formatting, renames, or generated noise.
- Prefer clarity and necessity over sheer line count. A small precise change can beat a large diffuse one.
- Do not favor a side merely because its patch is longer or noisier.
- Weight what the change does for the project, not the contributor's name.

Return ONLY a JSON object: {"winner": "A" or "B", "ratio": "N:M", "explanation": "..."}
The explanation must cite concrete differences in the patches (1-3 sentences).

Side A — contributor: tommy-mor
Side A — commit message:
[8dab9b80] nice

Side A — unified diff (full patch):
diff --git a/server/src/fetch/html.rs b/server/src/fetch/html.rs
index 3e0309ff1c2ac1b17923922d2340ba6710e0f9d1..dadf050515f0473943dad97df5d318032c8cb385 100644
--- a/server/src/fetch/html.rs
+++ b/server/src/fetch/html.rs
@@ -10,13 +10,18 @@ use crate::{
     ui_action::UI_RPC_FIELD,
 };
 
-fn entity_panel(node: &NodeState) -> Markup {
+/// CSS selector for Idiomorph / SSE updates of one entity block.
+pub fn entity_section_selector(item: &ItemId) -> String {
+    format!(r#"[data-entity-section="{}"]"#, item.as_str())
+}
+
+pub 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" {
+            div class="entity-card" {
                 h2 { (data.title) }
                 @if let Some(author) = &data.author {
                     p class="muted small" { "by " (author) }
@@ -76,11 +81,11 @@ pub fn fetch_entity_panel(item: &ItemId, has_data: bool, fetching: bool) -> Mark
     }
 }
 
-/// Entity card + fetch control (target `#entity-section` for Idiomorph / SSE).
+/// Entity card + fetch control (morph target [`entity_section_selector`]).
 pub fn entity_section(item: &ItemId, node: &NodeState, fetching: bool) -> Markup {
     let has_data = node.data.is_some();
     html! {
-        section id="entity-section" class="demo-panel" {
+        section class="entity-section demo-panel" data-entity-section=(item.as_str()) {
             (entity_panel(node))
             (fetch_entity_panel(item, has_data, fetching))
         }
diff --git a/server/src/fetch/mod.rs b/server/src/fetch/mod.rs
index 35f968c21c69ca557bab7951413e3cfbbccfebfd..f5759a34a1afe4069805441cefde6474a6403550 100644
--- a/server/src/fetch/mod.rs
+++ b/server/src/fetch/mod.rs
@@ -77,8 +77,9 @@ pub fn fetch_entity_stream(
             let tree = state.tree.read().await;
             let empty = NodeState::default();
             let node = tree.get(&id).unwrap_or(&empty);
+            let sel = html::entity_section_selector(&id);
             JsBuilder::new()
-                .morph_selector("#entity-section", html::entity_section(&id, node, true))
+                .morph_selector(&sel, html::entity_section(&id, node, true))
                 .build()
         };
         yield Ok(js_event(fetching_js));
@@ -100,12 +101,13 @@ pub fn fetch_entity_stream(
             FetchJobResult::Imported(_)
             | FetchJobResult::NotFound
             | FetchJobResult::SkippedCached
-            | FetchJobResult::SkippedDuplicate => {
+            |             FetchJobResult::SkippedDuplicate => {
                 let tree = state.tree.read().await;
                 let empty = NodeState::default();
                 let node = tree.get(&id).unwrap_or(&empty);
+                let sel = html::entity_section_selector(&id);
                 let mut b = JsBuilder::new()
-                    .morph_selector("#entity-section", html::entity_section(&id, node, false));
+                    .morph_selector(&sel, html::entity_section(&id, node, false));
                 if kind == FetchKind::Children {
                     b = b.morph_selector("#ranking-panel", ranking_panel(&id, node, &tree));
                 }
@@ -115,8 +117,9 @@ pub fn fetch_entity_stream(
                 let tree = state.tree.read().await;
                 let empty = NodeState::default();
                 let node = tree.get(&id).unwrap_or(&empty);
+                let sel = html::entity_section_selector(&id);
                 let js = JsBuilder::new()
-                    .morph_selector("#entity-section", html::entity_section(&id, node, false))
+                    .morph_selector(&sel, html::entity_section(&id, node, false))
                     .raw(&error_js(&format!("Reddit rate limit — retry in {reset_secs}s.")))
                     .build();
                 yield Ok(js_event(js));
@@ -125,8 +128,9 @@ pub fn fetch_entity_stream(
                 let tree = state.tree.read().await;
                 let empty = NodeState::default();
                 let node = tree.get(&id).unwrap_or(&empty);
+                let sel = html::entity_section_selector(&id);
                 let js = JsBuilder::new()
-                    .morph_selector("#entity-section", html::entity_section(&id, node, false))
+                    .morph_selector(&sel, html::entity_section(&id, node, false))
                     .raw(&error_js(&format!("Fetch failed: {msg}")))
                     .build();
                 yield Ok(js_event(js));
diff --git a/server/src/html/vote.rs b/server/src/html/vote.rs
index 89ed621ad861214e147add2062224fc4137ff8ad..48752f4d78d4762d1badc44e8df008bf5a45bab4 100644
--- a/server/src/html/vote.rs
+++ b/server/src/html/vote.rs
@@ -8,6 +8,7 @@ use maud::{html, Markup};
 use serde::Deserialize;
 
 use crate::{
+    fetch::html::entity_section,
     form_template::template_json_compact,
     html::JsBuilder,
     pair::{children_of, resolve_pair, suggest_next_pair_in_pool},
@@ -169,37 +170,13 @@ pub(crate) fn vote_recorded_morph(
 }
 
 fn vote_compare_item_card(tree: &GlobalTree, item: &ItemId, side_class: &str) -> Markup {
-    let href = item_href(item);
-    let title = child_title(tree, item);
+    let node = tree.get(item).cloned().unwrap_or_else(|| NodeState {
+        id: item.clone(),
+        ..Default::default()
+    });
     html! {
         div class=(format!("vote-compare-side {side_class}")) {
-            a class=(format!("vote-compare-item {side_class}")) href=(href) {
-                @if let Some(row) = crate::render::reddit::child_row_markup(tree, item, &href) {
-                    (row)
-                } @else {
-                    strong { (title) }
-                }
-            }
-            @if let Some(node) = tree.get(item) {
-                @if crate::render::reddit::is_reddit_post(item) {
-                    @if let Some(data) = &node.data {
-                        @if let Some(src) = data.image_url.as_ref().or(data.thumb_url.as_ref()) {
-                            figure class="vote-compare-figure" {
-                                img class="vote-compare-image" src=(src) alt="" loading="lazy";
-                            }
-                        }
-                        @if let Some(author) = &data.author {
-                            p class="muted small" { "by " (author) }
-                        }
-                    }
-                } @else if let Some(data) = &node.data {
-                    @if let Some(body) = &data.body_html {
-                        div class="vote-compare-item-body" {
-                            (maud::PreEscaped(body))
-                        }
-                    }
-                }
-            }
+            (entity_section(item, &node, false))
         }
     }
 }
@@ -270,9 +247,6 @@ pub async fn vote_page(
                 (vote_compare_item_card(&tree, &right, "vote-compare-right"))
             }
             (vote_back_nav(&parent))
-            div id="vote-edge-history-region" {
-                (edge_history)
-            }
             form id="vote-compare-form" method="POST" action="/ui" {
                 input type="hidden" name=(UI_RPC_FIELD) value=(rpc_json);
                 input type="hidden" name="ratio_left" id="vote-ratio-left" value="50";
@@ -285,6 +259,9 @@ pub async fn vote_page(
                 }
                 (vote_compare_actions(&parent, next_pair.as_ref()))
             }
+            div id="vote-edge-history-region" {
+                (edge_history)
+            }
         }
     };
 
diff --git a/server/src/render/reddit.rs b/server/src/render/reddit.rs
index 4a18de93cf57d8395ded3caa373a708f39b3f43f..c4f98fc760c32ce1b41a91bd41e97908bd198937 100644
--- a/server/src/render/reddit.rs
+++ b/server/src/render/reddit.rs
@@ -11,7 +11,7 @@ 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`).
+/// Post detail card (inside [`crate::fetch::html::entity_panel`]).
 pub fn entity_markup(node: &NodeState) -> Option<Markup> {
     if !is_reddit_post(&node.id) {
         return None;
@@ -41,7 +41,7 @@ pub fn child_row_markup(tree: &GlobalTree, id: &ItemId, href: &str) -> Option<Ma
 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" {
+        div class="entity-card reddit-post" {
             h2 { (data.title) }
             @if let Some(author) = &data.author {
                 p class="muted small" { "by " (author) }
diff --git a/server/static/sorter.css b/server/static/sorter.css
index b95718ce463b200a5667d3014dac2119836a0bef..9379c5f41dedbd41fd8951099a118de1da2a62f4 100644
--- a/server/static/sorter.css
+++ b/server/static/sorter.css
@@ -254,38 +254,11 @@ h1 {
 }
 
 .vote-compare-side {
-  background: var(--panel);
-  border: 1px solid var(--border);
-  border-radius: 8px;
-  padding: 1rem;
   min-height: 120px;
 }
 
-.vote-compare-item {
-  color: var(--accent);
-  text-decoration: none;
-  display: block;
-}
-
-.vote-compare-item:hover {
-  text-decoration: underline;
-}
-
-.vote-compare-figure {
-  margin: 0.75rem 0 0;
-}
-
-.vote-compare-image {
-  display: block;
-  max-width: 100%;
-  height: auto;
-  border-radius: 6px;
-  border: 1px solid var(--border);
-}
-
-.vote-compare-item-body {
-  margin-top: 0.75rem;
-  font-size: 0.9rem;
+.vote-compare-side .entity-section {
+  margin: 0;
 }
 
 .vote-compare-nav {


Side B — contributor: tommy-mor
Side B — commit message:
[bf118bdf] Sanitize Reddit entity body HTML before rendering.

Use ammonia at render time so untrusted selftext_html cannot execute scripts in our origin.

Co-authored-by: Cursor <cursoragent@cursor.com>

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