{"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[1c914c6e] stage set\n\nSide A — unified diff (full patch):\ndiff --git a/plan.md b/plan.md\nnew file mode 100644\nindex 0000000000000000000000000000000000000000..00d6867a1e0ed144a16a020ea037f685ce646c73\n--- /dev/null\n+++ b/plan.md\n@@ -0,0 +1,155 @@\n+# Plan: `ItemId` + `RouteContext` (identity vs hrefs)\n+\n+This document is for **the next agent** to continue the refactor without re-deriving context from chat. It supersedes ad-hoc notes: treat it as the checklist of record until the work lands and this file is deleted or trimmed.\n+\n+## Goal\n+\n+- **Identity** (what lives in the reducer graph, votes, indexes) becomes a **structural `ItemId` enum** in `slug-types`, not a canonical `String` / `CanonicalItemUrl` newtype.\n+- **Presentation** (tilde / dash display, breadcrumbs) derives from `ItemId` via explicit methods, not string stripping.\n+- **Routing** (browser `href`s for public vs room) goes through **`RouteContext`** (started in `server/src/html/routing.rs`) so Maud/handlers do not stitch `/r/…` vs `/~` ad hoc.\n+\n+**Non-goals for v1 of the migration:** backward-compatible JSONL or dual-read of old canonical strings in the event log (project has accepted breaking changes). If you reintroduce compat, document it here.\n+\n+## Current state (as of this plan)\n+\n+- **`CanonicalItemUrl`** (`types/src/paths.rs`): newtype around `String`; `parse` / `parent` / `display_path` / `tilde_tail` / etc. Reducer `ContentState`, `VoteData`, ranking, RPC, search, garden, breadcrumbs all use it or `String` keys derived from it.\n+- **`ThreadNav`** (`server/src/html/forum/nav.rs`): encodes scope prefixes for threads and garden URLs; **`RouteContext`** now wraps `ThreadNav` (`server/src/html/routing.rs`, re-exported from `server/src/html/mod.rs`) but **most HTML still takes `&ThreadNav` directly** — migration incomplete.\n+- **URL normalization** lives in `types/src/url_normalize.rs` + `canonicalize_item` / `finalize_external_identity_url` in `paths.rs` (YouTube, sorted query params, room path `room_route_segment` in `paths.rs`).\n+- **Room HTTP paths** are `/r/{short}{slug}` (fused segment); wire **`room_id`** remains `short/slug` for RPC/events.\n+\n+## Target architecture\n+\n+### `ItemId` (types)\n+\n+Suggested shape (adjust after profiling `Ord` / `Hash` / serde size):\n+\n+```text\n+ItemId::Root                      — tilde ontology root (today `SLUG_TILDE_ONTOLOGY_ROOT`)\n+ItemId::Local { segments }        — slug.social ~/… path as Vec<String> (lowercase segments, non-empty for non-root)\n+ItemId::External { url: Url }    — normalized `url::Url` (crate `url` already in `slug-types`)\n+```\n+\n+**API surface (minimum):**\n+\n+- `ItemId::parse(&str) -> Option<ItemId>` — single entry from DSL / user input / legacy wire (internally may call `canonicalize_item` + structured split).\n+- `ItemId::to_wire_url(&self) -> String` — only for **external** boundaries if needed (HTTP fetch, rare assertions); avoid using as the primary key once maps use `ItemId`.\n+- `parent`, `display_path`, `tilde_tail` / `tilde_http_tail`, `tilde_segments`, `last_segment`, `normalized_storage` — port from `CanonicalItemUrl`.\n+- **`Ord` + `Hash` + `Eq`** stable for `BTreeSet` / `HashMap` (see `write_actor` scope-rank snapshots).\n+- **`Serialize` / `Deserialize`** — decide **tagged JSON** for any persisted or API-carried structs (e.g. `VoteData` in tests). If RPC must stay stringy for clients, use a **DTO layer** that converts `ItemId` ↔ wire at the boundary only.\n+\n+**Remove:** `CanonicalItemUrl` type and all `path_types::CanonicalItemUrl` / `slug_types::paths::CanonicalItemUrl` exports once call sites are migrated. **`Borrow<str>`** on the old newtype goes away; update `nav!` / any code that assumed map keys borrowed as `str`.\n+\n+### `RouteContext` (server HTML)\n+\n+- **File:** `server/src/html/routing.rs` — **`RouteContext(ThreadNav)`** with `item_href`, `item_href_raw`, `thread_url`, `garden_root_url`, `room_url`, `From`/`Into` `ThreadNav`.\n+- **Direction:** new code and refactored Maud should take **`&RouteContext`** (or owned where appropriate) instead of `&ThreadNav` when building links. Long term, **`item_href(&ItemId)`** should not parse strings — it should pattern-match `ItemId` and append tilde tail or `/-/…` external tail using the same rules as today’s `ThreadNav::garden_item_url`.\n+\n+### Axum / garden routes\n+\n+- **No** single catch-all route (explicit decision): keep the existing router layout in `server/src/lib.rs`.\n+- Room routes stay **`/r/:room_key/...`** with `room_key` fused; parsing via `slug_types::room_id_from_route_segment` / `room_route_segment` in `paths.rs`.\n+\n+## Phased execution (recommended order)\n+\n+### Phase 0 — Preconditions (quick)\n+\n+1. Read **`AGENTS.md`** (UI contract, durability matrix, `RpcCommand` vs `HtmlUiAction`).\n+2. Run **`cargo test --workspace`** and **`./scripts/clj-test.sh`** on clean `main` before large diffs; repeat after each phase.\n+\n+### Phase 1 — `ItemId` in `slug-types` (no server yet)\n+\n+1. Add **`ItemId`** (new file e.g. `types/src/item_id.rs` **or** inline at bottom of `paths.rs` — see **Module cycle** below).\n+2. Implement **`ItemId::parse`** using existing **`canonicalize_item`** + normalization; port **`CanonicalItemUrl`** methods to **`ItemId`** with tests ported from `paths.rs` `#[cfg(test)] mod tests`.\n+3. **`GardenItemUrl::from_stored(&ItemId, room_wire)`** (and thread helpers) — build absolute hrefs from structure, not from re-parsing a canonical string.\n+4. **`TildeHttpPathTail::to_item_id`** (rename from `to_canonical`) / **`tilde_http_path_to_item_id`**.\n+5. **`TildeOntologyPath::from_stored(&ItemId)`**.\n+6. Export **`ItemId`** from **`types/src/lib.rs`**; update **`server/src/path_types.rs`** re-exports.\n+7. **Delete `CanonicalItemUrl`** and fix all **in-crate** references in `types` only until `cargo test` passes for `slug-types`.\n+\n+**Module cycle trap:** `item_id.rs` must not `use crate::paths::{...}` if `paths.rs` also imports `ItemId` for `GardenItemUrl` in the same module. **Fix one of:**\n+\n+- **A)** Put `ItemId` **inside `paths.rs`** below `canonicalize_item` / helpers (simplest, large file), or  \n+- **B)** Split **`canonicalize_item`** (+ dash host helpers + `finalize_external_identity_url`) into **`types/src/item_wire.rs`**, then `paths.rs` + `item_id.rs` both depend on `item_wire` only (cleaner, more files).\n+\n+### Phase 2 — Reducer + ranking (server core)\n+\n+1. **`server/src/reducer.rs`**: `ContentState` / `GroupState` / **`VoteData`** — replace **`CanonicalItemUrl`** with **`ItemId`** on all maps, sets, deques, vectors.\n+2. **`apply_vote`**: normalize `a`/`b` via **`ItemId::parse`** or **`ItemId`**-aware logic (remove string round-trip).\n+3. **`apply_ingest_to_content`**: **`dsl`** still yields strings for item titles in statements; normalize to **`ItemId`** at ingest boundary via **`ItemId::parse`** once per item.\n+4. **`server/src/ranking.rs`**, **`server/src/scope_rank.rs`**, **`server/src/api/write_actor.rs`** (including **`BTreeSet`** ordering), **`server/src/api/validate.rs`**, **`server/src/api/helpers.rs`** — propagate **`ItemId`**.\n+5. **`server/tests/basic.rs`** and any reducer tests constructing **`VoteData`** — use **`ItemId::parse(...).unwrap()`** or helpers.\n+\n+### Phase 3 — RPC + search + external resolver\n+\n+1. **`server/src/api/rpc.rs`**: rank/pair/matchup/search payloads; today many paths use **`GardenItemUrl::from_storage_str(item.as_str(), …)`** — switch to **`ItemId`** + **`GardenItemUrl::from_stored(&item_id, …)`** (or equivalent).\n+2. **`server/src/html/search.rs`**: scoring uses item path strings — derive from **`ItemId::display_path`** / **`to_wire_url`** only at the scoring boundary if needed.\n+3. **`server/src/external_resolver.rs`**: take **`&ItemId`** or **`ItemId::external_url()`** instead of **`&CanonicalItemUrl`**.\n+\n+### Phase 4 — HTML / Maud\n+\n+1. **`ThreadNav::garden_item_url`**: overload or replace with **`garden_item_href(&self, item: &ItemId)`** (no `CanonicalItemUrl::parse` inside).\n+2. **`RouteContext`**: extend **`item_href(&ItemId)`**; migrate call sites from **`ThreadNav`** to **`RouteContext`** where only link-building is needed (keep **`ThreadNav`** where scope / auth helpers need the full struct).\n+3. **`server/src/html/garden.rs`**, **`breadcrumb_path.rs`**, **`forum/*`**, **`editor.rs`**: replace **`CanonicalItemUrl`** with **`ItemId`**; breadcrumbs should walk **`ItemId::parent`** without string `rsplit`.\n+4. **`types` JSON types** (`RankRow`, etc.): decide whether **`GardenItemUrl`** stays string for JSON or becomes a structured field; keep **one** wire format for the public API.\n+\n+### Phase 5 — Cleanup + docs\n+\n+1. Remove dead **`canonical_path`** / **`breadcrumb_path`** string logic if fully superseded.\n+2. Update **`AGENTS.md`** if durability, `POST /ui`, or command surfaces change.\n+3. Delete or shrink **`plan.md`** when done.\n+\n+## File / symbol checklist (non-exhaustive — grep-driven)\n+\n+Run periodically:\n+\n+```bash\n+rg \"CanonicalItemUrl\" -g'*.rs'\n+rg \"path_types::CanonicalItemUrl\" -g'*.rs'\n+rg \"tilde_http_path_to_canonical\" -g'*.rs'\n+```\n+\n+**High-touch files (from prior exploration):**\n+\n+| Area | Files |\n+|------|--------|\n+| Types | `types/src/paths.rs`, `types/src/lib.rs`, `types/src/url_normalize.rs`, (optional) `types/src/item_id.rs`, `types/src/item_wire.rs` |\n+| Server re-exports | `server/src/path_types.rs`, `server/src/canonical_path.rs` |\n+| Reducer / ingest | `server/src/reducer.rs`, `server/src/dsl.rs` (parse output types if changed) |\n+| Ranking | `server/src/ranking.rs`, `server/src/scope_rank.rs` |\n+| Writer / RPC | `server/src/api/write_actor.rs`, `server/src/api/rpc.rs`, `server/src/api/helpers.rs`, `server/src/api/validate.rs` |\n+| HTML | `server/src/html/garden.rs`, `server/src/html/breadcrumb_path.rs`, `server/src/html/forum/nav.rs`, `server/src/html/routing.rs`, `server/src/html/search.rs`, `server/src/html/editor.rs`, `server/src/html/forum/ingest.rs`, … |\n+| Tests | `server/tests/basic.rs`, `server/tests/integration.rs`, `types/src/paths.rs` tests, Clojure under `test/` if URLs/assertions mention canonical shapes |\n+\n+## Events / JSONL\n+\n+- **`Ingest`** events store **`raw` DSL** only — no change required for item identity inside the event.\n+- If any future event type stores item ids as strings, migrate to **structured `ItemId` serde** or accept string only at the event boundary with immediate parse into **`ItemId`** on `apply_event`.\n+\n+## `nav!` macro (`server/src/paths.rs`)\n+\n+- Macros use **`keypath($key)`** with **`.clone()`** — **`ItemId`** must be **`Clone`** (already for enums). Remove any reliance on **`Borrow<str>`** for map keys.\n+\n+## Testing gate\n+\n+After each phase:\n+\n+```bash\n+cargo test --workspace\n+./scripts/clj-test.sh\n+```\n+\n+## Risks / gotchas\n+\n+1. **`Ord` on `ItemId`**: must match prior **`CanonicalItemUrl`** / `String` ordering wherever **`BTreeSet`** is used (e.g. deterministic scope-rank snapshots in **`write_actor`**).\n+2. **External `ItemId`**: **`Url`** equality / hashing — normalization is already centralized in **`url_normalize`**; ensure **`ItemId::parse`** always inserts normalized **`Url`** into **`External`**.\n+3. **Fake parent URLs** in garden (e.g. **`https://.`** for external root ranking): find all **`parse(\"https://.\")`** style hacks and express as **`ItemId`** or a dedicated sentinel.\n+4. **Serde**: tests and any RPC clients that snapshot JSON may need expectation updates if **`VoteData`** shape changes.\n+\n+## Optional follow-ups (not blocking `ItemId`)\n+\n+- More **domain normalizers** in **`url_normalize.rs`** (e.g. `music.youtube.com`, Spotify, etc.).\n+- **Room wire** vs **HTTP segment** helpers already in **`paths.rs`** (`ROOM_SHORT_ID_LEN`, `room_route_segment`, `room_id_from_route_segment`).\n+\n+---\n+\n+**End state criteria:** `rg CanonicalItemUrl` returns nothing; reducer maps use **`ItemId`**; HTML link generation for items goes through **`RouteContext` + `ItemId`**; tests and Kaocha green.\ndiff --git a/server/src/html/mod.rs b/server/src/html/mod.rs\nindex c3dccd03dc6da2a2f6f6fa828657e33a951884b1..668403a35c415e6f091362b28c63ac294057fb6d 100644\n--- a/server/src/html/mod.rs\n+++ b/server/src/html/mod.rs\n@@ -15,6 +15,7 @@ mod breadcrumb_path;\n mod editor;\n mod forum;\n mod garden;\n+pub mod routing;\n mod search;\n pub mod ui_action;\n use breadcrumb_path::{ExternalOntologyPath, OntologyPath};\n@@ -35,6 +36,7 @@ pub use garden::{\n     external_garden_index, external_ontology_path, garden_index, ontology_path, room_external_garden_index,\n     room_external_ontology_path, room_garden_index, room_ontology_path,\n };\n+pub use routing::RouteContext;\n pub use search::{search_page, search_results_fragment};\n pub use forum::user_profile_page;\n pub use ui_action::{parse_html_ui_from_form, HtmlUiAction, HtmlUiParseError, UI_RPC_FIELD};\ndiff --git a/server/src/html/routing.rs b/server/src/html/routing.rs\nnew file mode 100644\nindex 0000000000000000000000000000000000000000..13e9ae0cbe32d454e34a7737edf8234d2a558502\n--- /dev/null\n+++ b/server/src/html/routing.rs\n@@ -0,0 +1,71 @@\n+//! Scoped browser paths for HTML. **RouteContext** is the intended single place to build `href`s\n+//! given public vs room scope (the original blueprint name); today it wraps [`ThreadNav`].\n+//!\n+//! Prefer `RouteContext::item_href` / [`RouteContext::thread_url`] in new Maud over stitching\n+//! `/r/…` vs `/~` manually. Call sites can migrate incrementally from passing `&ThreadNav`.\n+\n+use crate::path_types::CanonicalItemUrl;\n+\n+use super::forum::ThreadNav;\n+\n+#[derive(Clone)]\n+pub struct RouteContext(ThreadNav);\n+\n+impl RouteContext {\n+    #[inline]\n+    pub fn public() -> Self {\n+        Self(ThreadNav::public())\n+    }\n+\n+    #[inline]\n+    pub fn from_room_id(room_id: &str) -> Option<Self> {\n+        ThreadNav::from_room_id(room_id).map(Self)\n+    }\n+\n+    #[inline]\n+    pub fn thread_nav(&self) -> &ThreadNav {\n+        &self.0\n+    }\n+\n+    #[inline]\n+    pub fn into_thread_nav(self) -> ThreadNav {\n+        self.0\n+    }\n+\n+    /// Relative path for a stored canonical item in this scope’s garden.\n+    pub fn item_href(&self, item: &CanonicalItemUrl) -> String {\n+        self.0.garden_item_url(item.as_str())\n+    }\n+\n+    /// Same as [`Self::item_href`] but parses `item` first (raw DSL / user paste).\n+    pub fn item_href_raw(&self, item: &str) -> String {\n+        self.0.garden_item_url(item)\n+    }\n+\n+    #[inline]\n+    pub fn thread_url(&self, tag: &str) -> String {\n+        self.0.thread_url(tag)\n+    }\n+\n+    #[inline]\n+    pub fn garden_root_url(&self) -> &str {\n+        self.0.garden_root_url()\n+    }\n+\n+    #[inline]\n+    pub fn room_url(&self) -> &str {\n+        self.0.room_url()\n+    }\n+}\n+\n+impl From<ThreadNav> for RouteContext {\n+    fn from(nav: ThreadNav) -> Self {\n+        Self(nav)\n+    }\n+}\n+\n+impl From<RouteContext> for ThreadNav {\n+    fn from(ctx: RouteContext) -> Self {\n+        ctx.0\n+    }\n+}\n\n\nSide B — contributor: tommy-mor\nSide B — commit message:\n[c99adc26] refactor forum into files\n\nSide B — unified diff (full patch):\ndiff --git a/bb.edn b/bb.edn\nindex 4680e82d4227057d2eea6041dc5647beb759131d..ce0f6fcd45a67ead3295b90db2a301e9b304f3da 100644\n--- a/bb.edn\n+++ b/bb.edn\n@@ -51,6 +51,11 @@\n    :requires ([test.walkthrough-fixture :as walkthrough-fixture])\n    :task (walkthrough-fixture/run-fixture)}\n \n+  sample-fixture\n+  {:doc \"macOS: run `sample` on process(es) listening on the fixture TCP port (default 8080). Usage: bb sample-fixture [PORT] [DURATION_SEC] [OUT_DIR]\"\n+   :requires ([scripts.sample-fixture :as sample-fixture])\n+   :task (apply sample-fixture/-main *command-line-args*)}\n+\n   perf\n   {:doc \"Performance test: concurrent HTTP requests to detect blocking I/O\"\n    :requires ([scripts.perf :as perf])\ndiff --git a/scripts/sample_fixture.bb b/scripts/sample_fixture.bb\nnew file mode 100644\nindex 0000000000000000000000000000000000000000..ac2368623c5043ba6e027afef6b5b37d392767b0\n--- /dev/null\n+++ b/scripts/sample_fixture.bb\n@@ -0,0 +1,70 @@\n+(ns scripts.sample-fixture\n+  \"Find process(es) listening on the fixture port (default 8080) and run macOS `sample`.\"\n+  (:require [babashka.fs :as fs]\n+            [babashka.process :as p]\n+            [clojure.string :as str]))\n+\n+(defn- usage []\n+  (println \"Usage: bb sample-fixture [PORT] [DURATION_SEC] [OUT_DIR]\")\n+  (println \"\")\n+  (println \"  Finds PIDs bound to TCP LISTEN on PORT (default 8080), then runs\")\n+  (println \"  `sample` for each PID. OUT_DIR defaults to the current directory.\")\n+  (println \"\")\n+  (println \"  Example:  bb sample-fixture\")\n+  (println \"            bb sample-fixture 8080 10\")\n+  (println \"            bb sample-fixture 8080 5 /tmp\")\n+  (println \"\")\n+  (println \"  Requires macOS (the `sample` tool).\"))\n+\n+(defn- parse-long* [s]\n+  (try (Long/parseLong s)\n+       (catch NumberFormatException _ nil)))\n+\n+(defn- listen-pids [port]\n+  (let [spec (str \"TCP:\" port)\n+        {:keys [out exit]}\n+        @(p/process [\"lsof\" \"-nP\" (str \"-i\" spec) \"-sTCP:LISTEN\" \"-t\"]\n+                    {:out :string :err :string})]\n+    (when (zero? exit)\n+      (->> (str/split-lines out)\n+           (map str/trim)\n+           (remove str/blank?)\n+           (distinct)\n+           vec))))\n+\n+(defn- sample-bin []\n+  (or (fs/which \"sample\")\n+      (throw (ex-info \"macOS `sample` not found on PATH\" {}))))\n+\n+(defn- run-sample! [sample duration-sec pid out-file]\n+  (println (str \"sampling PID \" pid \" for \" duration-sec \"s → \" out-file))\n+  (let [{:keys [exit err]} @(p/process [sample (str pid) (str duration-sec) \"-file\" out-file]\n+                                      {:out :inherit :err :inherit})]\n+    (when-not (zero? exit)\n+      (binding [*out* *err*]\n+        (println \"sample failed:\" err))\n+      (System/exit exit))))\n+\n+(defn -main [& args]\n+  (when (some #{\"-h\" \"--help\" \"help\"} args)\n+    (usage)\n+    (System/exit 0))\n+  (let [port (or (some-> (first args) parse-long*) 8080)\n+        duration-sec (or (some-> (second args) parse-long*) 5)\n+        out-dir (or (nth args 2 nil) \".\")\n+        pids (listen-pids port)]\n+    (when (or (nil? pids) (empty? pids))\n+      (binding [*out* *err*]\n+        (println (str \"No process listening on TCP \" port \" (LISTEN). Is `bb fixture` running?\")))\n+      (System/exit 1))\n+    (when-not (fs/exists? out-dir)\n+      (binding [*out* *err*]\n+        (println \"Output directory does not exist:\" out-dir))\n+      (System/exit 1))\n+    (let [sample (sample-bin)\n+          ts (str (System/currentTimeMillis))]\n+      (println (str \"port \" port \" → PIDs \" (str/join \", \" pids)))\n+      (doseq [pid pids]\n+        (let [out-file (str (fs/path out-dir) \"/slug-sample-\" port \"-\" pid \"-\" ts \".txt\")]\n+          (run-sample! sample duration-sec pid (str out-file))))\n+      (println \"done.\"))))\ndiff --git a/server/src/html/forum.rs b/server/src/html/forum.rs\nindex a55fc1f79d03719eb74b216865b2c15199c48ea7..5ad8dfc84dd735d589432e2c613ff687a75f2e61 100644\n--- a/server/src/html/forum.rs\n+++ b/server/src/html/forum.rs\n@@ -380,22 +380,6 @@ fn room_members_inner(members: &[RoomMemberRow]) -> Markup {\n     }\n }\n \n-pub(crate) fn set_room_members_expanded_rpc(room_wire: &str, expanded: bool) -> String {\n-    template_json_compact(&HtmlUiAction::SetRoomMembersExpanded {\n-        room_wire: room_wire.to_string(),\n-        expanded,\n-    })\n-    .expect(\"static json\")\n-}\n-\n-pub(crate) fn set_room_new_thread_compose_expanded_rpc(nav: &ThreadNav, expanded: bool) -> String {\n-    template_json_compact(&HtmlUiAction::SetRoomNewThreadComposeExpanded {\n-        room_wire: nav.room_wire.clone(),\n-        expanded,\n-    })\n-    .expect(\"static json\")\n-}\n-\n /// Fragment for `#room-members-section` — expand/collapse is server-driven via `POST /ui`.\n pub(crate) fn room_members_section_markup(\n     reduced: &ReducerState,\n@@ -406,13 +390,14 @@ pub(crate) fn room_members_section_markup(\n     if members.is_empty() {\n         return html! {};\n     }\n-    let rpc_open = set_room_members_expanded_rpc(room_id, true);\n-    let rpc_close = set_room_members_expanded_rpc(room_id, false);\n     html! {\n         div id=\"room-members-section\" {\n             @if members_expanded {\n                 form method=\"POST\" action=\"/ui\" {\n-                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(rpc_close);\n+                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(template_json_compact(&HtmlUiAction::SetRoomMembersExpanded {\n+                        room_wire: room_id.to_string(),\n+                        expanded: false,\n+                    }).expect(\"static json\"));\n                     button type=\"submit\" class=\"form-toggle\" aria-expanded=\"true\" {\n                         \"hide members & permissions\"\n                     }\n@@ -422,7 +407,10 @@ pub(crate) fn room_members_section_markup(\n                 }\n             } @else {\n                 form method=\"POST\" action=\"/ui\" {\n-                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(rpc_open);\n+                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(template_json_compact(&HtmlUiAction::SetRoomMembersExpanded {\n+                        room_wire: room_id.to_string(),\n+                        expanded: true,\n+                    }).expect(\"static json\"));\n                     button type=\"submit\" class=\"form-toggle\" aria-expanded=\"false\" {\n                         \"members & permissions\"\n                     }\n@@ -514,28 +502,24 @@ fn compose_form(nav: &ThreadNav, thread_tag: &str, show: bool) -> Markup {\n     if !show {\n         return html! {};\n     }\n-    let rpc_post = template_json_compact(&json!({\n-        \"action\": \"post_ingest\",\n-        \"room\": nav.room_wire,\n-        \"thread_tag\": thread_tag,\n-        \"text\": {\"$form\": \"text\"},\n-        \"error_target\": \"thread-compose-errors\",\n-        \"form_id\": \"thread-compose-form\",\n-    }))\n-    .unwrap();\n-    let rpc_check = template_json_compact(&json!({\n-        \"action\": \"check_ingest\",\n-        \"room\": nav.room_wire,\n-        \"thread_tag\": thread_tag,\n-        \"text\": {\"$form\": \"text\"},\n-        \"error_target\": \"thread-compose-errors\",\n-        \"form_id\": \"thread-compose-form\",\n-    }))\n-    .unwrap();\n     html! {\n         section class=\"compose\" id=\"thread-compose\" {\n-            form id=\"thread-compose-form\" method=\"POST\" action=\"/ui\" data-check-action=\"/ui\" data-check-rpc=(rpc_check) {\n-                input type=\"hidden\" name=(UI_RPC_FIELD) value=(rpc_post);\n+            form id=\"thread-compose-form\" method=\"POST\" action=\"/ui\" data-check-action=\"/ui\" data-check-rpc=(template_json_compact(&json!({\n+                \"action\": \"check_ingest\",\n+                \"room\": nav.room_wire,\n+                \"thread_tag\": thread_tag,\n+                \"text\": {\"$form\": \"text\"},\n+                \"error_target\": \"thread-compose-errors\",\n+                \"form_id\": \"thread-compose-form\",\n+            })).unwrap()) {\n+                input type=\"hidden\" name=(UI_RPC_FIELD) value=(template_json_compact(&json!({\n+                    \"action\": \"post_ingest\",\n+                    \"room\": nav.room_wire,\n+                    \"thread_tag\": thread_tag,\n+                    \"text\": {\"$form\": \"text\"},\n+                    \"error_target\": \"thread-compose-errors\",\n+                    \"form_id\": \"thread-compose-form\",\n+                })).unwrap());\n                 textarea name=\"text\" rows=\"5\" cols=\"80\" placeholder=\"prose or ~/items and votes…\" {}\n                 p {\n                     button type=\"submit\" { \"post\" }\n@@ -712,7 +696,7 @@ pub async fn home(\n             p class=\"muted\" { \"dark = time-ordered · light = vote-ranked\" }\n             div class=\"thread-feed-toolbar\" {\n                 form method=\"POST\" action=\"/ui\" {\n-                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(expand_public_new_thread_rpc_value());\n+                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(template_json_compact(&HtmlUiAction::ExpandPublicNewThreadForm).expect(\"static json\"));\n                     button type=\"submit\" class=\"section-add-btn\" { \"+\" }\n                 }\n             }\n@@ -1002,14 +986,15 @@ fn new_thread_form_for_room(nav: &ThreadNav, show: bool, compose_expanded: bool)\n     if !show {\n         return html! {};\n     }\n-    let rpc_open = set_room_new_thread_compose_expanded_rpc(nav, true);\n-    let rpc_close = set_room_new_thread_compose_expanded_rpc(nav, false);\n     // Single root for Idiomorph when morphing `#room-new-thread-ui-slot` (expanded has form + section).\n     html! {\n         div class=\"room-new-thread-slot-inner\" {\n             @if compose_expanded {\n                 form method=\"POST\" action=\"/ui\" {\n-                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(rpc_close);\n+                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(template_json_compact(&HtmlUiAction::SetRoomNewThreadComposeExpanded {\n+                        room_wire: nav.room_wire.clone(),\n+                        expanded: false,\n+                    }).expect(\"static json\"));\n                     button type=\"submit\" class=\"form-toggle\" aria-expanded=\"true\" {\n                         \"-\"\n                     }\n@@ -1039,7 +1024,10 @@ fn new_thread_form_for_room(nav: &ThreadNav, show: bool, compose_expanded: bool)\n                 }\n             } @else {\n                 form method=\"POST\" action=\"/ui\" {\n-                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(rpc_open);\n+                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(template_json_compact(&HtmlUiAction::SetRoomNewThreadComposeExpanded {\n+                        room_wire: nav.room_wire.clone(),\n+                        expanded: true,\n+                    }).expect(\"static json\"));\n                     button type=\"submit\" class=\"form-toggle\" aria-expanded=\"false\" {\n                         \"+\"\n                     }\n@@ -1049,10 +1037,6 @@ fn new_thread_form_for_room(nav: &ThreadNav, show: bool, compose_expanded: bool)\n     }\n }\n \n-pub(crate) fn expand_public_new_thread_rpc_value() -> String {\n-    template_json_compact(&HtmlUiAction::ExpandPublicNewThreadForm).expect(\"static json\")\n-}\n-\n pub(crate) fn login_to_post_hint_markup() -> Markup {\n     html! {\n         p class=\"muted\" { \"log in to post\" }\ndiff --git a/server/src/html/forum/access.rs b/server/src/html/forum/access.rs\nnew file mode 100644\nindex 0000000000000000000000000000000000000000..f9f7139b63442a6ef3a927b77a72805f15feec3f\n--- /dev/null\n+++ b/server/src/html/forum/access.rs\n@@ -0,0 +1,16 @@\n+use crate::events::ThreadCapability;\n+use crate::reducer::ReducerState;\n+\n+pub(crate) fn user_can_view_room(reduced: &ReducerState, room_id: &str, username: Option<&str>) -> bool {\n+    if !reduced.rooms.contains(room_id) {\n+        return false;\n+    }\n+    let Some(u) = username else {\n+        return false;\n+    };\n+    reduced.user_has_cap(room_id, u, ThreadCapability::View)\n+}\n+\n+pub(crate) fn user_can_post_room(reduced: &ReducerState, room_id: &str, username: &str) -> bool {\n+    reduced.user_has_cap(room_id, username, ThreadCapability::Post)\n+}\ndiff --git a/server/src/html/forum/ingest.rs b/server/src/html/forum/ingest.rs\nnew file mode 100644\nindex 0000000000000000000000000000000000000000..c045046a005db4f8f4d1dc7ea74aaaba45e0f3f4\n--- /dev/null\n+++ b/server/src/html/forum/ingest.rs\n@@ -0,0 +1,171 @@\n+use crate::canonical_path::canonicalize_tag;\n+use crate::form_template::template_json_compact;\n+use crate::reducer::{scope_from_room_wire, ReducerState};\n+use maud::{html, Markup};\n+use serde_json::json;\n+\n+use crate::html::js_string_literal;\n+use crate::html::ui_action::{HtmlUiAction, UI_RPC_FIELD};\n+use crate::html::{profile_href, render_linkified_with_embeds_in_scope, timeago};\n+\n+use super::nav::ThreadNav;\n+\n+/// `POST /ui` + `__rpc__` from an inline link (`onclick`); same-origin credentials as other morph actions.\n+pub(super) fn thread_ui_fetch_onclick(rpc_compact_json: &str) -> String {\n+    format!(\n+        \"fetch('/ui',{{method:'POST',headers:{{'Content-Type':'application/x-www-form-urlencoded'}},body:new URLSearchParams({{__rpc__:{}}}).toString(),credentials:'same-origin'}}).then(r=>r.text()).then(eval);return false\",\n+        js_string_literal(rpc_compact_json)\n+    )\n+}\n+\n+pub(super) fn thread_nav_for_ingest(ing: &crate::events::Ingest) -> Option<ThreadNav> {\n+    let room = ing.room_id.trim();\n+    if room.is_empty() || room == \"public\" {\n+        Some(ThreadNav::public())\n+    } else {\n+        ThreadNav::from_room_id(room)\n+    }\n+}\n+\n+pub(super) fn thread_post_index_in_scope(reduced: &ReducerState, ing: &crate::events::Ingest) -> Option<usize> {\n+    let scope = scope_from_room_wire(&ing.room_id);\n+    let tag = canonicalize_tag(&ing.thread_tag);\n+    reduced\n+        .ingests_by_scope_thread\n+        .get(&(scope, tag))\n+        .and_then(|q| q.iter().rev().position(|id| id == &ing.id))\n+}\n+\n+fn post_header_meta(\n+    nav: &ThreadNav,\n+    tag: &str,\n+    post_idx: usize,\n+    principal: &str,\n+    ts: i64,\n+    now: i64,\n+) -> Markup {\n+    let post_href = nav.post_url(tag, post_idx);\n+    let profile = profile_href(principal);\n+    let hover = timeago::rfc3339_utc(ts);\n+    let ago = timeago::timeago(now, ts);\n+    html! {\n+        div class=\"ingest-meta muted\" title=(hover) {\n+            a href=(post_href) class=\"post-num\" { \"#\" (post_idx) }\n+            \" \"\n+            a href=(profile) class=\"post-author\" { \"@\" (principal) }\n+            \" · \"\n+            (ago)\n+        }\n+    }\n+}\n+\n+pub(super) fn post_header_row(\n+    nav: &ThreadNav,\n+    tag: &str,\n+    post_idx: usize,\n+    ing: &crate::events::Ingest,\n+    _viewer: Option<&str>,\n+    now: i64,\n+    show_delete: bool,\n+) -> Markup {\n+    let meta = post_header_meta(nav, tag, post_idx, &ing.principal, ing.ts, now);\n+    html! {\n+        div class=\"ingest-header-row\" {\n+            (meta)\n+            @if show_delete {\n+                form class=\"post-delete-form\" method=\"POST\" action=\"/ui\" {\n+                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(template_json_compact(&HtmlUiAction::RedactPost { post_id: ing.id.clone() }).unwrap());\n+                    button type=\"submit\" class=\"post-delete-btn\" { \"delete\" }\n+                }\n+            }\n+        }\n+    }\n+}\n+\n+pub(super) fn redacted_header_row(\n+    nav: &ThreadNav,\n+    tag: &str,\n+    post_idx: usize,\n+    ing: &crate::events::Ingest,\n+    now: i64,\n+    expanded: bool,\n+) -> Markup {\n+    let meta = post_header_meta(nav, tag, post_idx, &ing.principal, ing.ts, now);\n+    let rpc_expand = template_json_compact(&json!({\n+        \"action\": \"expand_redacted_post\",\n+        \"room\": nav.room_wire,\n+        \"thread_tag\": tag,\n+        \"post_index\": post_idx,\n+    }))\n+    .unwrap();\n+    let rpc_collapse = template_json_compact(&json!({\n+        \"action\": \"collapse_redacted_post\",\n+        \"room\": nav.room_wire,\n+        \"thread_tag\": tag,\n+        \"post_index\": post_idx,\n+    }))\n+    .unwrap();\n+    let onclick_expand = thread_ui_fetch_onclick(&rpc_expand);\n+    let onclick_collapse = thread_ui_fetch_onclick(&rpc_collapse);\n+    html! {\n+        div class=\"ingest-header-row ingest-tombstone-row\" {\n+            (meta)\n+            span class=\"post-tombstone-inline muted\" {\n+                \"deleted · \"\n+                @if expanded {\n+                    a href=\"#\" class=\"hide-deleted-link\"\n+                      onclick=(onclick_collapse) {\n+                        \"[hide deleted content]\"\n+                    }\n+                } @else {\n+                    a href=\"#\" class=\"show-deleted-link\"\n+                      onclick=(onclick_expand) {\n+                        \"[show deleted content]\"\n+                    }\n+                }\n+            }\n+        }\n+    }\n+}\n+\n+pub(super) fn ingest_entry_markup(\n+    nav: &ThreadNav,\n+    tag: &str,\n+    post_idx: usize,\n+    ing: &crate::events::Ingest,\n+    viewer: Option<&str>,\n+    now: i64,\n+    reduced: &ReducerState,\n+) -> Markup {\n+    let redacted = reduced.redacted_posts.contains(&ing.id);\n+    let show_delete = viewer == Some(ing.principal.as_str()) && !redacted;\n+    if redacted {\n+        html! {\n+            div class=\"ingest-entry ingest-redacted\" data-ingest-id=(ing.id) {\n+                (redacted_header_row(nav, tag, post_idx, ing, now, false))\n+            }\n+        }\n+    } else {\n+        let truncated = ing.raw.len() > 2000;\n+        let display_body = if truncated { &ing.raw[..2000] } else { &ing.raw[..] };\n+        html! {\n+            div class=\"ingest-entry\" data-ingest-id=(ing.id) {\n+                (post_header_row(nav, tag, post_idx, ing, viewer, now, show_delete))\n+                (render_linkified_with_embeds_in_scope(display_body, nav.garden_root_url()))\n+                @if truncated {\n+                    @let rpc_full = template_json_compact(&json!({\n+                        \"action\": \"expand_post_full\",\n+                        \"room\": nav.room_wire,\n+                        \"thread_tag\": tag,\n+                        \"post_index\": post_idx,\n+                    })).unwrap();\n+                    @let onclick_full = thread_ui_fetch_onclick(&rpc_full);\n+                    a href=\"#\" class=\"show-full-link\"\n+                      onclick=(onclick_full) {\n+                        \"[show full post]\"\n+                    }\n+                }\n+            }\n+        }\n+    }\n+}\ndiff --git a/server/src/html/forum/nav.rs b/server/src/html/forum/nav.rs\nnew file mode 100644\nindex 0000000000000000000000000000000000000000..f5d437f2b1c6a0b727f1540d83774ba4e440f0b1\n--- /dev/null\n+++ b/server/src/html/forum/nav.rs\n@@ -0,0 +1,78 @@\n+use crate::canonical_path::canonicalize_item;\n+use crate::reducer::ScopeId;\n+\n+/// URL helpers for public `/t/…` and private room threads `/r/{short}/{slug}/t/…`.\n+#[derive(Clone)]\n+pub struct ThreadNav {\n+    pub room_wire: String,\n+    scope: ScopeId,\n+    room_path: String,\n+    thread_path_prefix: String,\n+    garden_path_prefix: String,\n+}\n+\n+impl ThreadNav {\n+    pub(crate) fn public() -> Self {\n+        Self {\n+            room_wire: \"public\".into(),\n+            scope: ScopeId::Public,\n+            room_path: \"/t\".into(),\n+            thread_path_prefix: \"/t\".into(),\n+            garden_path_prefix: \"/~\".into(),\n+        }\n+    }\n+\n+    /// `room_id` wire form `shortid/slug`.\n+    pub(crate) fn from_room_id(room_id: &str) -> Option<Self> {\n+        let (short, slug) = room_id.split_once('/')?;\n+        if short.is_empty() || slug.is_empty() {\n+            return None;\n+        }\n+        Some(Self {\n+            room_wire: room_id.to_string(),\n+            scope: ScopeId::Room(room_id.to_string()),\n+            room_path: format!(\"/r/{short}/{slug}\"),\n+            thread_path_prefix: format!(\"/r/{short}/{slug}/t\"),\n+            garden_path_prefix: format!(\"/r/{short}/{slug}/~\"),\n+        })\n+    }\n+\n+    pub(crate) fn scope(&self) -> ScopeId {\n+        self.scope.clone()\n+    }\n+\n+    pub(crate) fn room_url(&self) -> &str {\n+        &self.room_path\n+    }\n+\n+    pub(crate) fn thread_url(&self, tag: &str) -> String {\n+        format!(\"{}/{}\", self.thread_path_prefix, tag)\n+    }\n+\n+    pub(crate) fn garden_root_url(&self) -> &str {\n+        &self.garden_path_prefix\n+    }\n+\n+    pub(crate) fn garden_item_url(&self, item: &str) -> String {\n+        if let Some(tail) = crate::path_types::CanonicalItemUrl::parse(item)\n+            .and_then(|c| c.tilde_tail().map(str::to_owned))\n+        {\n+            format!(\"{}/{}\", self.garden_path_prefix, tail)\n+        } else {\n+            format!(\"{}/{}\", self.garden_path_prefix, canonicalize_item(item))\n+        }\n+    }\n+\n+    pub(crate) fn thread_page_url(&self, tag: &str, offset: usize) -> String {\n+        let base = self.thread_url(tag);\n+        if offset == 0 {\n+            base\n+        } else {\n+            format!(\"{base}?offset={offset}\")\n+        }\n+    }\n+\n+    pub(crate) fn post_url(&self, tag: &str, idx: usize) -> String {\n+        format!(\"{}/{}/{}\", self.thread_path_prefix, tag, idx)\n+    }\n+}\ndiff --git a/server/src/html/forum/new_thread.rs b/server/src/html/forum/new_thread.rs\nnew file mode 100644\nindex 0000000000000000000000000000000000000000..b2d24b8ab3ec7eee0edd16bed8ee6605e49bf408\n--- /dev/null\n+++ b/server/src/html/forum/new_thread.rs\n@@ -0,0 +1,157 @@\n+use crate::form_template::template_json_compact;\n+use crate::html::ui_action::{HtmlUiAction, UI_RPC_FIELD};\n+use maud::{html, Markup};\n+use serde_json::json;\n+\n+use super::nav::ThreadNav;\n+\n+struct NewThreadIds {\n+    compose_section_id: &'static str,\n+    errors_id: &'static str,\n+    form_id: &'static str,\n+    tag_input_id: &'static str,\n+    text_input_id: Option<&'static str>,\n+}\n+\n+const PUBLIC_IDS: NewThreadIds = NewThreadIds {\n+    compose_section_id: \"public-new-thread-compose\",\n+    errors_id: \"public-new-thread-errors\",\n+    form_id: \"public-new-thread-form\",\n+    tag_input_id: \"new-thread-tag\",\n+    text_input_id: Some(\"new-thread-text\"),\n+};\n+\n+const ROOM_IDS: NewThreadIds = NewThreadIds {\n+    compose_section_id: \"room-new-thread-compose\",\n+    errors_id: \"room-new-thread-errors\",\n+    form_id: \"room-new-thread-form\",\n+    tag_input_id: \"room-new-tag\",\n+    text_input_id: None,\n+};\n+\n+#[derive(Clone, Copy)]\n+enum NewThreadComposeKind {\n+    /// Home page: no client-side check RPC; post template omits `error_target` / `form_id`.\n+    Public,\n+    /// Room page: `check_ingest` + error targets on post (matches thread compose).\n+    Room,\n+}\n+\n+/// Shared `<section class=\"compose\">` for creating a thread + first post.\n+fn new_thread_compose_section(room_wire: &str, ids: &NewThreadIds, kind: NewThreadComposeKind) -> Markup {\n+    let client_check = matches!(kind, NewThreadComposeKind::Room);\n+    let (tag_placeholder, text_placeholder, submit_label) = match kind {\n+        NewThreadComposeKind::Public => (\n+            \"thread-title-slug-here\",\n+            \"Hello threadgoers!! Behold my new thread!\",\n+            \"create thread / make first post\",\n+        ),\n+        NewThreadComposeKind::Room => (\n+            \"thread-topic-slug-here\",\n+            \"First post body…\",\n+            \"post\",\n+        ),\n+    };\n+\n+    html! {\n+        section class=\"compose\" id=(ids.compose_section_id) {\n+            div id=(ids.errors_id) {}\n+            @if client_check {\n+                form id=(ids.form_id) method=\"POST\" action=\"/ui\" data-check-action=\"/ui\" data-check-rpc=(template_json_compact(&json!({\n+                    \"action\": \"check_ingest\",\n+                    \"room\": room_wire,\n+                    \"thread_tag\": {\"$form\": \"thread_tag\"},\n+                    \"text\": {\"$form\": \"text\"},\n+                    \"error_target\": ids.errors_id,\n+                    \"form_id\": ids.form_id,\n+                })).unwrap()) {\n+                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(template_json_compact(&json!({\n+                        \"action\": \"post_ingest\",\n+                        \"room\": room_wire,\n+                        \"thread_tag\": {\"$form\": \"thread_tag\"},\n+                        \"text\": {\"$form\": \"text\"},\n+                        \"error_target\": ids.errors_id,\n+                        \"form_id\": ids.form_id,\n+                    })).unwrap());\n+                    input type=\"text\" id=(ids.tag_input_id) name=\"thread_tag\" pattern=\"[a-z0-9_\\\\-]{1,64}\" required placeholder=(tag_placeholder);\n+                    @if let Some(tid) = ids.text_input_id {\n+                        textarea id=(tid) name=\"text\" rows=\"4\" placeholder=(text_placeholder) required {}\n+                    } @else {\n+                        textarea name=\"text\" rows=\"4\" placeholder=(text_placeholder) required {}\n+                    }\n+                    p { button type=\"submit\" { (submit_label) } }\n+                }\n+            } @else {\n+                form id=(ids.form_id) method=\"POST\" action=\"/ui\" {\n+                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(template_json_compact(&json!({\n+                        \"action\": \"post_ingest\",\n+                        \"room\": room_wire,\n+                        \"thread_tag\": {\"$form\": \"thread_tag\"},\n+                        \"text\": {\"$form\": \"text\"},\n+                    })).unwrap());\n+                    input type=\"text\" id=(ids.tag_input_id) name=\"thread_tag\" pattern=\"[a-z0-9_\\\\-]{1,64}\" placeholder=(tag_placeholder);\n+                    @if let Some(tid) = ids.text_input_id {\n+                        textarea id=(tid) name=\"text\" rows=\"4\" placeholder=(text_placeholder) {}\n+                    } @else {\n+                        textarea name=\"text\" rows=\"4\" placeholder=(text_placeholder) {}\n+                    }\n+                    p { button type=\"submit\" { (submit_label) } }\n+                }\n+            }\n+        }\n+    }\n+}\n+\n+fn new_thread_form_public(show: bool) -> Markup {\n+    if !show {\n+        return html! {};\n+    }\n+    new_thread_compose_section(\"public\", &PUBLIC_IDS, NewThreadComposeKind::Public)\n+}\n+\n+fn new_thread_form_for_room(nav: &ThreadNav, show: bool, compose_expanded: bool) -> Markup {\n+    if !show {\n+        return html! {};\n+    }\n+    // Single root for Idiomorph when morphing `#room-new-thread-ui-slot` (expanded has form + section).\n+    html! {\n+        div class=\"room-new-thread-slot-inner\" {\n+            @if compose_expanded {\n+                form method=\"POST\" action=\"/ui\" {\n+                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(template_json_compact(&HtmlUiAction::SetRoomNewThreadComposeExpanded {\n+                        room_wire: nav.room_wire.clone(),\n+                        expanded: false,\n+                    }).expect(\"static json\"));\n+                    button type=\"submit\" class=\"form-toggle\" aria-expanded=\"true\" {\n+                        \"-\"\n+                    }\n+                }\n+                (new_thread_compose_section(&nav.room_wire, &ROOM_IDS, NewThreadComposeKind::Room))\n+            } @else {\n+                form method=\"POST\" action=\"/ui\" {\n+                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(template_json_compact(&HtmlUiAction::SetRoomNewThreadComposeExpanded {\n+                        room_wire: nav.room_wire.clone(),\n+                        expanded: true,\n+                    }).expect(\"static json\"));\n+                    button type=\"submit\" class=\"form-toggle\" aria-expanded=\"false\" {\n+                        \"+\"\n+                    }\n+                }\n+            }\n+        }\n+    }\n+}\n+\n+pub(crate) fn login_to_post_hint_markup() -> Markup {\n+    html! {\n+        p class=\"muted\" { \"log in to post\" }\n+    }\n+}\n+\n+pub(crate) fn fragment_public_new_thread_form(show: bool) -> Markup {\n+    new_thread_form_public(show)\n+}\n+\n+pub(crate) fn fragment_room_new_thread_form(nav: &ThreadNav, show: bool, compose_expanded: bool) -> Markup {\n+    new_thread_form_for_room(nav, show, compose_expanded)\n+}\ndiff --git a/server/src/html/forum/room_members.rs b/server/src/html/forum/room_members.rs\nnew file mode 100644\nindex 0000000000000000000000000000000000000000..bc13d3eb8030f00799c90c47e689a876168f522c\n--- /dev/null\n+++ b/server/src/html/forum/room_members.rs\n@@ -0,0 +1,108 @@\n+use crate::events::ThreadCapability;\n+use crate::form_template::template_json_compact;\n+use crate::reducer::ReducerState;\n+use maud::{html, Markup};\n+\n+use crate::html::ui_action::{HtmlUiAction, UI_RPC_FIELD};\n+\n+#[derive(Clone)]\n+pub(super) struct RoomMemberRow {\n+    pub(super) username: String,\n+    pub(super) capabilities: Vec<&'static str>,\n+}\n+\n+fn capability_label(cap: ThreadCapability) -> &'static str {\n+    match cap {\n+        ThreadCapability::View => \"view\",\n+        ThreadCapability::Post => \"post\",\n+        ThreadCapability::Vote => \"vote\",\n+        ThreadCapability::AddItem => \"add_item\",\n+        ThreadCapability::Manage => \"manage\",\n+    }\n+}\n+\n+fn room_members_for_room(reduced: &ReducerState, room_id: &str) -> Vec<RoomMemberRow> {\n+    let mut rows: Vec<RoomMemberRow> = reduced\n+        .grants\n+        .get(room_id)\n+        .into_iter()\n+        .flat_map(|members| members.iter())\n+        .map(|(username, caps)| {\n+            let mut ordered = Vec::new();\n+            for cap in [\n+                ThreadCapability::View,\n+                ThreadCapability::Post,\n+                ThreadCapability::Vote,\n+                ThreadCapability::AddItem,\n+                ThreadCapability::Manage,\n+            ] {\n+                if caps.contains(&cap) {\n+                    ordered.push(capability_label(cap));\n+                }\n+            }\n+            RoomMemberRow {\n+                username: username.clone(),\n+                capabilities: ordered,\n+            }\n+        })\n+        .collect();\n+    rows.sort_by(|a, b| a.username.cmp(&b.username));\n+    rows\n+}\n+\n+fn room_members_inner(members: &[RoomMemberRow]) -> Markup {\n+    html! {\n+        h3 { \"members\" }\n+        ul class=\"room-members\" {\n+            @for member in members {\n+                li {\n+                    span class=\"room-member-name\" { \"@\" (member.username) }\n+                    span class=\"muted\" {\n+                        \" · \"\n+                        (member.capabilities.join(\", \"))\n+                    }\n+                }\n+            }\n+        }\n+    }\n+}\n+\n+/// Fragment for `#room-members-section` — expand/collapse is server-driven via `POST /ui`.\n+pub(crate) fn room_members_section_markup(\n+    reduced: &ReducerState,\n+    room_id: &str,\n+    members_expanded: bool,\n+) -> Markup {\n+    let members = room_members_for_room(reduced, room_id);\n+    if members.is_empty() {\n+        return html! {};\n+    }\n+    html! {\n+        div id=\"room-members-section\" {\n+            @if members_expanded {\n+                form method=\"POST\" action=\"/ui\" {\n+                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(template_json_compact(&HtmlUiAction::SetRoomMembersExpanded {\n+                        room_wire: room_id.to_string(),\n+                        expanded: false,\n+                    }).expect(\"static json\"));\n+                    button type=\"submit\" class=\"form-toggle\" aria-expanded=\"true\" {\n+                        \"hide members & permissions\"\n+                    }\n+                }\n+                section class=\"room-members-panel\" {\n+                    (room_members_inner(&members))\n+                }\n+            } @else {\n+                form method=\"POST\" action=\"/ui\" {\n+                    input type=\"hidden\" name=(UI_RPC_FIELD) value=(template_json_compact(&HtmlUiAction::SetRoomMembersExpanded {\n+                        room_wire: room_id.to_string(),\n+                        expanded: true,\n+                    }).expect(\"static json\"));\n+                    button type=\"submit\" class=\"form-toggle\" aria-expanded=\"false\" {\n+                        \"members & permissions\"\n+                    }\n+                }\n+            }\n+        }\n+    }\n+}\n","role":"user"}],"model":"openai/gpt-chat-latest"}