constitution · epochs · watch · epoch 3

comparison

c_477013996fa5 (tommy-mor) vs c_14dd365ffe22 (tommy-mor)

download prompt · raw event · cmp_6cd88a74c7be5b

council reasoning

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

B introduces a clean, testable URL scheme change (`/~/` browse routing) with new ItemId methods, unit tests, integration tests, and removes dead theme-switching machinery, yielding a simpler and more maintainable routing model. A adds real but narrower value (sorting vote history, morph preview card, fullscreen layout) with a good test, but includes large speculative CSS duplication across three theme files and a doc rewrite, which is more surface area for less structural payoff than B's URL refactor.

~x-ai/grok-latest · winner B · 2:3 · permalink

B establishes lasting core design: path-based `/~/` browse routes, `ItemId::browse_href`/`from_browse_uri`, and drops the whole theme cookie/POST stack for a single stylesheet—structural URL and app-shell changes. A is solid product work (chromeless vote-compare, left-aligned edge-history sort, post morph + tests) but stays scoped to one UI flow rather than re-plumbing navigation.

openai/gpt-chat-latest · winner A · 3:1 · permalink

Side A delivers functional improvements to the vote-compare workflow: it adds a fullscreen chromeless layout, morphs the newly created vote preview after submission, normalizes and sorts edge-history ratios relative to the displayed left/right order, and includes tests covering the new sorting behavior and browser interactions. Side B mainly removes theme support while introducing cleaner browse URLs (`/~/...`) and helper methods like `browse_href`, which is useful but also deletes existing functionality and is narrower in long-term impact than the end-to-end UI and correctness improvements in Side A.

sides

A — c_477013996fa5 (tommy-mor)

message

[893a2007] fullscreen?

diff preview

diff --git a/agents.md b/agents.md
index d9a924d2f77c444d9b112bbf37a480b963ace4f0..1f66ddbeddd1e40310947c7eb474c1ac4858bc42 100644
--- a/agents.md
+++ b/agents.md
@@ -37,9 +37,9 @@ Strict **CSP** that blocks `eval` would break the current app. Other projects ma
 
 - **Non-morph `POST /ui` responses:** **`SetGardenPin`** returns **`303 See Other`** and **`Set-Cookie`** (same as **`POST /theme`**). Garden pin/unpin is a normal **`<form method="POST" action="/ui" data-navigate="full">`** — browser navigation applies cookies reliably (see **`test/browser_garden_pin.clj`**). Each **`__rpc__`** payload includes **`form_action: "/ui"`**; **`post_ui_html`** rejects mismatches to bind tokens to the UI endpoint.
 
-- **`VoteComparePost`:** On success returns **`text/javascript`** that **morphs** **`#vote-compare-preview`** (new ingest card) and **`#vote-edge-history-region`** (recomputed edge list). Uses **`RpcResult::PostOk`**’s **`post_id`** / **`post_index`** for the card. **`__rpc__`** carries **`form_action: "/ui"`**; **`thread_tag`** and ratio fields come from the same form as **`$form`** holes.
+- **`VoteComparePost`:** On success returns **`text/javascript`** that **morphs** **`#vote-compare-preview`** (new ingest card), **`#vote-edge-history-region`** (recomputed **`<ul>`** — ratios match **`left`/`right`** query order, bullets, sorted by strength toward **`left`** then newer). The compare **`GET`** page uses **`layout_full_bleed_chromeless`** (no breadcrumbs, no **`#controls`**, no **`slug-pin-hud`**; **`view-vote-compare-fullscreen`** full-width **`body`**). **`__rpc__`** carries **`form_action: "/ui"`**; **`thread_tag`** and ratio fields come from the same form as **`$form`** holes.
 
-- **Garden pin / compare voting:** Cookie **`slug_garden_pin`** via **`set_garden_pin`**. Pairwise UI: **`GET /vote/compare?…`** / **`GET /r/:room_key/vote/compare?…`**. HUD: **`#slug-pin-hud`** when **`layout`** passes garden metadata on **`body`**; the label is **`POST /ui`** **`set_garden_pin`** **`clear:true`** (**`slug_ui.js`**), not a permalink to the item.
+- **Garden pin / compare voting:** Cookie **`slug_garden_pin`** via **`set_garden_pin`**. Pairwise UI: **`GET /vote/compare?…`** / **`GET /r/:room_key/vote/compare?…`** (fullscreen **`GET`** page: no HUD; other garden pages). HUD (**`#slug-pin-hud`**): only when **`layout`** passes garden metadata on **`body`**; the label is **`POST /ui`** **`set_garden_pin`** **`clear:true`** (**`slug_ui.js`**), not a permalink to the item.
 
 **Rule of thumb:** New **CLI or API** verbs → `RpcCommand`. New **in-page morph or form-driven** behavior that only makes sense in the browser → `HtmlUiAction`. If both need the same operation, implement the real work once (e.g. call shared RPC helpers from `post_ui_html`) and keep the wire shapes separate.
 
diff --git a/server/src/api/ui_html.rs b/server/src/api/ui_html.rs
index 5aa6a86326ba3545d261322c010e02fe86ee1c57..696e7b3605e2e68aee0351116c494c2958506add 100644
--- a/server/src/api/ui_html.rs
+++ b/server/src/api/ui_html.rs
@@ -254,7 +254,17 @@ async fn dispatch_ui_action(
                         };
                         n
                     };
-                    let js = vote_compare_post_success_js(state, &nav, &left_id, &right_id).await;
+                    let js = vote_compare_post_success_js(
+                        state,
+                        &nav,
+                        &room,
+                        &thread_tag,
+                        &left_id,
+                        &right_id,
+                        pid.as_str(),
+                        post_index,
+                    )
+                    .await;
                     Response::builder()
                         .status(StatusCode::OK)
                         .header(header::CONTENT_TYPE, "text/javascript; charset=utf-8")
diff --git a/server/src/html/garden.rs b/server/src/html/garden.rs
index 121d9498e8cb93d4d001dc1bbce23d74fbb958f5..41f9e9c64a80a55a9d3ece2a6a1f592cf5e8d8dd 100644
--- a/server/src/html/garden.rs
+++ b/server/src/html/garden.rs
@@ -22,17 +22,17 @@ use crate::{
     },
     events::ThreadCapability,
     path_types::ItemId,
-    reducer::{ContentState, ReducerState, ScopeId},
+    reducer::{scope_from_room_wire, ContentState, ReducerState, ScopeId},
     scope_rank::{build_children_rankings, ChildrenRankings},
     state::AppState,
     timeago,
 };
 
 use super::{
-    bc_path, bc_path_external, bc_segment, cli_panel, layout, now_ms, ratio_pct,
-    render_linkified_with_embeds_in_scope, theme_from_jar, theme_next_from_uri,
+    bc_path, bc_path_external, bc_segment, cli_panel, layout, layout_full_bleed_chromeless, now_ms,
+    ratio_pct, render_linkified_with_embeds_in_scope, theme_from_jar, theme_next_from_uri,
     breadcrumb_path::{ExternalOntologyPath, OntologyPath},
-    forum::{ThreadNav},
+    forum::{ingest_entry_markup, ThreadNav},
 };
 
 /// `GET /vote/compare` — pairs `left` / `right` query params with optional `thread`.
@@ -89,25 +89,62 @@ fn canonical_edge_items(a: &ItemId, b: &ItemId) -> (ItemId, ItemId) {
     }
 }
 
-/// Votes whose endpoints are exactly this unordered pair, oldest first.
-fn votes_for_edge(content: &ContentState, a: &ItemId, b: &ItemId) -> Vec<crate::reducer::VoteData> {
+/// All votes whose endpoints are exactly this unordered pair (unsorted).
+fn edge_vote_entries_for_pair(content: &ContentState, a: &ItemId, b: &ItemId) -> Vec<crate::reducer::VoteData> {
     let (lo, hi) = canonical_edge_items(a, b);
     let lo_s = lo.as_str();
     let hi_s = hi.as_str();
-    let mut out: Vec<crate::reducer::VoteData> = content
+    content
         .item_votes
         .get(&lo)
         .into_iter()
         .flat_map(|q| q.iter())
         .filter(|v| {
-            let touches = (v.a.as_str() == lo_s && v.b.as_str() == hi_s)
-                || (v.a.as_str() == hi_s && v.b.as_str() == lo_s);
-            touches
+            (v.a.as_str() == lo_s && v.b.as_str() == hi_s)
+                || (v.a.as_str() == hi_s && v.b.as_str() == lo_s)
         })
         .cloned()
-        .collect();
-    out.sort_by_key(|v| v.ts);
-    out
+        .collect()
+}
+
+fn ratios_for_compare_page(v: &crate::reducer::VoteData, page_left: &ItemId, page_right: &ItemId) -> (i32, i32) {
+    let pl = page_left.as_str();
+    let pr = page_right.as_str();
+    match (v.a.as_str(), v.b.as_str()) {
+        (a, b) if a == pl && b == pr => (v.ratio_left, v.ratio_right),
+        (a, b) if a == pr && b == pl => (v.ratio_right, v.ratio_left),
+        _ => (v.ratio_left, v.ratio_right),
+    }
+}
+
+fn left_share_normalized(ratio_left: i32, ratio_right: i32) -> f64 {
+    let l = ratio_left.max(0) as f64;
+    let r = ratio_right.max(0) as f64;
+    let sum = l + r;
+    if sum <= 0.0 {
+        0.5
+    } else {
+        l / sum
+    }
+}
+
+/// Stronger preference for **`page_left` first**; ties **newer first**.
+fn sort_votes_for_compare_display(
+    mut votes: Vec<crate::reducer::VoteData>,
+    page_left: &ItemId,
+    page_right: &ItemId,
+) -> Vec<crate::reducer::VoteData> {
+    votes.sort_by(|va, vb| {
+        let (ratio_left_a, ratio_right_a) = ratios_for_compare_page(va, page_left, page_right);
+        let (ratio_left_b, ratio_right_b) = ratios_for_compare_page(vb, page_left, page_right);
+        let sa = left_share_normalized(ratio_left_a, ratio_right_a);
+        let sb = left_share_normalized(ratio_left_b, ratio_right_b);
+        match sb.partial_cmp(&sa).unwrap_or(std::cmp::Ordering::Equal) {
+            std::cmp::Ordering::Equal => vb.ts.cmp(&va.ts),
+            o => o,
+        }
+    });
+    votes
 }
 
 /// Number of vote ingests recorded for this unordered pair in `content` (same scope as ranking).
@@ -144,39 +181,40 @@ fn vote_edge_history_markup(
     content: &ContentState,
     left: &ItemId,
     right: &ItemId,
-    nav: &ThreadNav,
 ) -> maud::Markup {
-    let votes = votes_for_edge(content, left, right);
-    let (lo, hi) = canonical_edge_items(left, right);
+    let votes = edge_vote_entries_for_pair(content, left, right);
+    let votes = sort_votes_for_compare_display(votes, left, right);
+    let legend_left = item_display_path(left.as_str());
+    let legend_right = item_display_path(right.as_str());
     html! {
         @if votes.is_empty() {
             p class="muted vote-edge-empty" { "no votes on this pair in this scope yet" }
         } @else {
-            h3 class="vote-edge-history-title" { "votes on this edge" }
-            ol class="vote-edge-history" {
+            h3 class="vote-edge-history-title" {
+                "votes on this edge"
+                span class="vote-edge-history-axis muted" { " · " (legend_left) " : " (legend_right) }
+            }
+            ul class="vote-edge-history" {
                 @for v in &votes {
-                    @let (ratio_lo, ratio_hi) = if v.a == lo && v.b == hi {
-                        (v.ratio_left, v.ratio_right)
-                    } else {
-                        (v.ratio_right, v.ratio_left)
-                    };
-                    @let pct = ratio_pct(ratio_lo, ratio_hi);
-                    @let left_class = if lo.as_str() == left.as_str() { "ratio-left current" } else { "ratio-left" };
-                    @let right_class = if hi.as_str() == left.as_str() { "ratio-right current" } else { "ratio-right" };
-                    li class="vote-edge-history-row" {
+                    @let (r_left, r_right) = ratios_for_compare_page(v, left, right);
+                    @let pct = ratio_pct(r_left, r_right);
+                    @let row_tip = format!(
+                        "{}:{} counts toward {} (left of bar) vs {} (right of bar); #{} · @{}",
+                        r_left,
+                        r_right,
+                        legend_left,
+                        legend_right,
+                        v.thread_tag,
+                        v.principal,
+                    );
+                    li class="vote-edge-history-row" title=(row_tip) {
                         div class="vote-edge-meta" {
-                            a href=(nav.garden_item_href(&lo)) {
-                                code { (item_display_path(lo.as_str())) }
-                            }
-                            span class="vote-edge-ratio" { (format!("{}:{}", ratio_lo, ratio_hi)) }
-                            a href=(nav.garden_item_href(&hi)) {
-                                code { (item_display_path(hi.as_str())) }
-                            }
+                            span class="vote-edge-ratio" { (format!("{}:{}", r_left, r_right)) }
                             span class="muted" { " · #" (v.thread_tag) " · @" (v.principal) }
                         }
-                        div class="ratio-bar vote-edge-bar" {
-                            div class=(left_class) style={(format!("width: {:.3}%;", pct))} {}
-                            div class=(right_class) style={(format!("width: {:.3}%;", 100.0 - pct))} {}
+                        div class="ratio-bar vote-edge-bar" aria-hidden="true" {
+                            div class="ratio-left" style={(format!("width: {:.3}%;", pct))} {}
+                            div class="ratio-right" style={(format!("width: {:.3}%;", 100.0 - pct))} {}
                         }
                         @if !v.body.trim().is_empty() {
                             div class="vote-edge-reason muted" { (v.body.trim()) }
@@ -192,14 +230,33 @@ fn vote_edge_history_markup(
 pub(crate) async fn vote_compare_post_success_js(
     state: &AppState,
     nav: &ThreadNav,
+    room_wire: &str,
+    thread_tag: &str,
     left: &ItemId,
     right: &ItemId,
+    post_id: &str,
+    post_idx: Option<usize>,
 ) -> String {
     let reduced = state.reduced.read().await;
+    let scope = scope_from_room_wire(room_wire);
+    let Some(ing) = reduced.ingests_by_id.get(post_id).cloned() else {
+        drop(reduced);
+        return "console.warn('vo

… preview truncated; 11,546 characters omitted

download full diff A

B — c_14dd365ffe22 (tommy-mor)

message

[8d5328d3] -theme

diff preview

diff --git a/server/src/api/ui_html.rs b/server/src/api/ui_html.rs
index 82b2aa51d21ada1d0d849d3ddfc3a81e4241d861..e74e42e0f0ffc4224f5ef5421b486a5f35434999 100644
--- a/server/src/api/ui_html.rs
+++ b/server/src/api/ui_html.rs
@@ -73,11 +73,7 @@ pub async fn post_ui_html(
                     ensure_partial_tree(&mut tree, &item);
                 }
                 let _ = state.ensure_node(&item).await;
-                let dest = if item.is_root() {
-                    "/".to_string()
-                } else {
-                    format!("/?item={}", item.as_str())
-                };
+                let dest = item.browse_href();
                 JsBuilder::new()
                     .raw(&format!(
                         "window.location.href={};",
diff --git a/server/src/html/mod.rs b/server/src/html/mod.rs
index c973cb718ac74b95570dabea76e24459417790b9..a8353c6de0cd6d268219e552b7ca1ba4e3000585 100644
--- a/server/src/html/mod.rs
+++ b/server/src/html/mod.rs
@@ -1,13 +1,10 @@
 use axum::{
     body::Body,
     extract::{Path, State},
-    http::{header, HeaderValue, StatusCode, Uri},
+    http::{header, StatusCode, Uri},
     response::{IntoResponse, Response},
-    Form,
 };
-use axum_extra::extract::cookie::CookieJar;
 use maud::{html, Markup, DOCTYPE};
-use serde::Deserialize;
 
 use crate::{
     form_template::template_json_compact,
@@ -15,96 +12,25 @@ use crate::{
     path_types::ItemId,
     ranking::{top_bottom, RankedItem},
     reducer::{GroupState, NodeState},
-    state::{parse_item_param, AppState},
+    state::AppState,
     ui_action::UI_RPC_FIELD,
 };
 
-const THEME_DEFAULT_CSS: &str = include_str!("../../static/theme_default.css");
-const THEME_RETRO_CSS: &str = include_str!("../../static/theme_retro.css");
+const SORTER_CSS: &str = include_str!("../../static/sorter.css");
 const SORTER_UI_JS: &str = include_str!("../../static/sorter_ui.js");
 
-pub const SORTER_THEME_COOKIE: &str = "sorter-theme";
-
-pub fn normalize_theme(raw: &str) -> &'static str {
-    match raw {
-        "retro" => "retro",
-        _ => "default",
-    }
-}
-
-pub fn theme_from_jar(jar: &CookieJar) -> &'static str {
-    jar.get(SORTER_THEME_COOKIE)
-        .map(|c| normalize_theme(c.value()))
-        .unwrap_or("default")
-}
-
-pub fn theme_next_from_uri(uri: &Uri) -> String {
-    uri.path_and_query()
-        .map(|pq| pq.as_str().to_string())
-        .filter(|s| !s.is_empty())
-        .unwrap_or_else(|| "/".to_string())
-}
-
-pub fn theme_cookie_header_value(theme: &str) -> HeaderValue {
-    let t = normalize_theme(theme);
-    let s = format!("{SORTER_THEME_COOKIE}={t}; Path=/; SameSite=Lax; Max-Age=31536000");
-    HeaderValue::from_str(&s).expect("theme cookie must be ASCII")
-}
-
-fn sanitize_theme_next(next: Option<&str>) -> String {
-    let s = next.unwrap_or("/").trim();
-    if s.starts_with('/') && !s.starts_with("//") && s.len() < 8192 {
-        s.to_string()
-    } else {
-        "/".to_string()
-    }
-}
-
-#[derive(Debug, Deserialize)]
-pub struct ThemeForm {
-    theme: String,
-    next: Option<String>,
-}
-
-pub async fn post_theme(Form(form): Form<ThemeForm>) -> impl IntoResponse {
-    let theme = normalize_theme(&form.theme);
-    let next = sanitize_theme_next(form.next.as_deref());
-    let loc =
-        HeaderValue::try_from(next.as_str()).unwrap_or_else(|_| HeaderValue::from_static("/"));
-    Response::builder()
-        .status(StatusCode::SEE_OTHER)
-        .header(header::LOCATION, loc)
-        .header(header::SET_COOKIE, theme_cookie_header_value(theme))
-        .body(Body::empty())
-        .expect("theme redirect response")
-}
-
 pub async fn serve_static(Path(filename): Path<String>) -> impl IntoResponse {
-    if filename == "sorter_ui.js" {
-        return Response::builder()
-            .status(StatusCode::OK)
-            .header(header::CONTENT_TYPE, "text/javascript; charset=utf-8")
-            .header(header::CACHE_CONTROL, "public, max-age=3600")
-            .body(SORTER_UI_JS.to_string())
-            .unwrap()
-            .into_response();
-    }
-
-    let theme = filename
-        .strip_prefix("theme_")
-        .and_then(|s| s.strip_suffix(".css"));
-
-    let css = match theme {
-        Some("default") => THEME_DEFAULT_CSS,
-        Some("retro") => THEME_RETRO_CSS,
+    let (content_type, body) = match filename.as_str() {
+        "sorter.css" => ("text/css; charset=utf-8", SORTER_CSS),
+        "sorter_ui.js" => ("text/javascript; charset=utf-8", SORTER_UI_JS),
         _ => return (StatusCode::NOT_FOUND, "static file not found").into_response(),
     };
 
     Response::builder()
         .status(StatusCode::OK)
-        .header(header::CONTENT_TYPE, "text/css; charset=utf-8")
+        .header(header::CONTENT_TYPE, content_type)
         .header(header::CACHE_CONTROL, "public, max-age=3600")
-        .body(css.to_string())
+        .body(body.to_string())
         .unwrap()
         .into_response()
 }
@@ -162,8 +88,7 @@ fn asset_version() -> &'static str {
     V.get_or_init(|| {
         use std::hash::{Hash, Hasher};
         let mut h = std::collections::hash_map::DefaultHasher::new();
-        THEME_DEFAULT_CSS.hash(&mut h);
-        THEME_RETRO_CSS.hash(&mut h);
+        SORTER_CSS.hash(&mut h);
         SORTER_UI_JS.hash(&mut h);
         format!("{:x}", h.finish())
     })
@@ -176,9 +101,9 @@ pub fn now_ms() -> i64 {
     t.as_millis() as i64
 }
 
-fn layout(title: &str, body: Markup, views: u64, theme: &str, theme_next: &str) -> Markup {
+fn layout(title: &str, body: Markup, views: u64) -> Markup {
     let ver = asset_version();
-    let css_href = format!("/static/theme_{theme}.css?v={ver}");
+    let css_href = format!("/static/sorter.css?v={ver}");
     let js_src = format!("/static/sorter_ui.js?v={ver}");
     html! {
         (DOCTYPE)
@@ -187,7 +112,7 @@ fn layout(title: &str, body: Markup, views: u64, theme: &str, theme_next: &str)
                 meta charset="utf-8";
                 meta name="viewport" content="width=device-width, initial-scale=1";
                 title { (title) }
-                link rel="stylesheet" href=(css_href) id="theme-stylesheet";
+                link rel="stylesheet" href=(css_href);
                 script src="https://unpkg.com/idiomorph@0.3.0/dist/idiomorph.min.js" {}
             }
             body class="home" {
@@ -196,21 +121,6 @@ fn layout(title: &str, body: Markup, views: u64, theme: &str, theme_next: &str)
                 }
                 div id="errors" {}
                 (body)
-                div id="controls" {
-                    a href="https://github.com/sortersocial/sorter2" id="src-link" { "src" }
-                    form id="sorter-theme-form" method="post" action="/theme" data-navigate="full" {
-                        input type="hidden" name="next" value=(theme_next);
-                        select id="theme-select" name="theme" onchange="this.form.submit()" aria-label="Theme" {
-                            @for (val, label) in [("default", "default"), ("retro", "retro")] {
-                                @if theme == val {
-                                    option value=(val) selected { (label) }
-                                } @else {
-                                    option value=(val) { (label) }
-                                }
-                            }
-                        }
-                    }
-                }
                 script src=(js_src) {}
             }
         }
@@ -218,11 +128,7 @@ fn layout(title: &str, body: Markup, views: u64, theme: &str, theme_next: &str)
 }
 
 fn item_href(id: &ItemId) -> String {
-    if id.is_root() {
-        "/".to_string()
-    } else {
-        format!("/?item={}", id.as_str())
-    }
+    id.browse_href()
 }
 
 fn segment_label(seg: &str) -> &str {
@@ -361,39 +267,10 @@ pub fn vote_panel(parent: &ItemId) -> Markup {
 }
 
 
-fn query_param(uri: &Uri, key: &str) -> Option<String> {
-    let q = uri.query()?;
-    q.split('&').find_map(|pair| {
-        let mut it = pair.splitn(2, '=');
-        if it.next()? == key {
-            Some(it.next().unwrap_or("").to_string())
-        } else {
-            None
-        }
-    })
-}
-
-pub async fn home(
-    State(state): State<AppState>,
-    jar: CookieJar,
-    uri: Uri,
-) -> impl IntoResponse {
+async fn item_page(state: AppState, uri: Uri, item: ItemId) -> Markup {
     let path = uri.path().to_string();
     state.views.increment(path.clone());
     let views = state.views.get_views(&path);
-    let theme = theme_from_jar(&jar);
-    let theme_next = theme_next_from_uri(&uri);
-
-    let item_raw = query_param(&uri, "item")
-        .or_else(|| query_param(&uri, "sub").map(|sub| {
-            if sub.is_empty() {
-                String::new()
-            } else {
-                format!("reddit.com/r/{sub}")
-            }
-        }))
-        .unwrap_or_default();
-    let item = parse_item_param(&item_raw);
 
     let tree = state.tree.read().await;
     let empty_node = NodeState::default();
@@ -408,5 +285,14 @@ pub async fn home(
         (vote_panel(&item))
         (ranking_panel(&item, group))
     };
-    layout("sorter2", body, views, theme, &theme_next)
+    layout("sorter2", body, views)
+}
+
+pub async fn home(State(state): State<AppState>, uri: Uri) -> impl IntoResponse {
+    item_page(state, uri, ItemId::root()).await
+}
+
+pub async fn browse(State(state): State<AppState>, uri: Uri) -> impl IntoResponse {
+    let item = ItemId::from_browse_uri(uri.path()).unwrap_or(ItemId::root());
+    item_page(state, uri, item).await
 }
diff --git a/server/src/lib.rs b/server/src/lib.rs
index 14e7cfbc38feb5d07aff859b64bce6e2ec45cf91..cd56743192919cf4dcea539b3d8873a21fb7e72b 100644
--- a/server/src/lib.rs
+++ b/server/src/lib.rs
@@ -30,9 +30,9 @@ pub fn create_app(state: AppState) -> Router {
     Router::new()
         .route("/healthz", get(|| async { "ok" }))
         .route("/static/:filename", get(crate::html::serve_static))
+        .route("/~/*item_path", get(crate::html::browse))
         .route("/", get(crate::html::home))
         .route("/ui", post(crate::api::ui_html::post_ui_html))
-        .route("/theme", post(crate::html::post_theme))
         .with_state(state)
         .layer(TraceLayer::new_for_http())
 }
diff --git a/server/src/path_types.rs b/server/src/path_types.rs
index b5c41444f7bcd4d8d289ed3af464bc3f14d0df99..12dce9888f5cd4e1a0974d12d6468368d0f775b9 100644
--- a/server/src/path_types.rs
+++ b/server/src/path_types.rs
@@ -90,6 +90,50 @@ impl ItemId {
         paths
     }
 
+    /// Full URL for the browser location bar after `/~/`.
+    pub fn to_browse_url(&self) -> String {
+        if self.is_root() {
+            return String::new();
+        }
+        if self.as_str().contains("://") {
+            return self.as_str().to_string();
+        }
+        if self
+            .segments()
+            .first()
+            .is_some_and(|s| s.contains('.'))
+        {
+            format!("https://{}", self.as_str())
+        } else {
+            self.as_str().to_string()
+        }
+    }
+
+    /// App route, e.g. `/~/https://reddit.com/r/rust`.
+    pub fn browse_href(&self) -> String {
+        if self.is_root() {
+            "/".to_string()
+        } else {
+            format!("/~/{}", self.to_browse_url())
+        }
+    }
+
+    /// Parse the tail after `/~/` in a request path.
+    pub fn from_browse_tail(tail: &str) -> ItemId {
+        let raw = normalize_browse_tail(tail);
+        if raw.is_empty() {
+            return ItemId::root();
+        }
+        ItemId::from_url(&raw)
+            .or_else(|| ItemId::parse(&raw))
+            .unwrap_or_else(|| ItemId::opaque(raw))
+    }
+
+    pub fn from_browse_uri(path: &str) -> Option<ItemId> {
+        path.strip_prefix("/~/")
+            .map(ItemId::from_browse_tail)
+    }
+
     fn canonicalize(raw: &str) -> Option<String> {
         let s = raw.trim();
         if s.is_empty() {
@@ -155

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