constitution · epochs · watch · epoch 3

comparison

c_7ec67b9cef2c (tommy-mor) vs c_59974b9da42a (tommy-mor)

download prompt · raw event · cmp_575db4ea2d74b9

council reasoning

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

Side B is an actual executed refactor that splits a monolithic forum.rs into focused modules (nav.rs, ingest.rs, new_thread.rs, room_members.rs, access.rs) plus a small useful debugging script, improving real code organization while preserving behavior. Side A is purely a planning document plus a thin, incomplete RouteContext wrapper that mostly just forwards to ThreadNav—useful as a roadmap but contributes no functional improvement yet and risks becoming stale/deleted per its own text.

~x-ai/grok-latest · winner A · 3:1 · permalink

A adds lasting architecture: a concrete RouteContext API (routing.rs + re-exports) and a detailed ItemId migration plan that defines identity vs href boundaries. B is mostly mechanical forum file-splitting plus a macOS sample-fixture helper—useful organization, but little new behavior or durable design compared with A’s scaffolding.

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

Side B performs a real codebase refactor by extracting forum functionality into focused modules (`access.rs`, `ingest.rs`, `nav.rs`, `new_thread.rs`, `room_members.rs`), introducing reusable components like `ThreadNav`, and moving existing UI logic without changing behavior, which improves maintainability. Side A mostly adds a detailed migration plan (`plan.md`) plus a thin `RouteContext` wrapper around `ThreadNav`; while useful as guidance, it leaves the underlying architecture largely unchanged.

sides

A — c_7ec67b9cef2c (tommy-mor)

message

[1c914c6e] stage set

diff preview

diff --git a/plan.md b/plan.md
new file mode 100644
index 0000000000000000000000000000000000000000..00d6867a1e0ed144a16a020ea037f685ce646c73
--- /dev/null
+++ b/plan.md
@@ -0,0 +1,155 @@
+# Plan: `ItemId` + `RouteContext` (identity vs hrefs)
+
+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.
+
+## Goal
+
+- **Identity** (what lives in the reducer graph, votes, indexes) becomes a **structural `ItemId` enum** in `slug-types`, not a canonical `String` / `CanonicalItemUrl` newtype.
+- **Presentation** (tilde / dash display, breadcrumbs) derives from `ItemId` via explicit methods, not string stripping.
+- **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.
+
+**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.
+
+## Current state (as of this plan)
+
+- **`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.
+- **`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.
+- **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`).
+- **Room HTTP paths** are `/r/{short}{slug}` (fused segment); wire **`room_id`** remains `short/slug` for RPC/events.
+
+## Target architecture
+
+### `ItemId` (types)
+
+Suggested shape (adjust after profiling `Ord` / `Hash` / serde size):
+
+```text
+ItemId::Root                      — tilde ontology root (today `SLUG_TILDE_ONTOLOGY_ROOT`)
+ItemId::Local { segments }        — slug.social ~/… path as Vec<String> (lowercase segments, non-empty for non-root)
+ItemId::External { url: Url }    — normalized `url::Url` (crate `url` already in `slug-types`)
+```
+
+**API surface (minimum):**
+
+- `ItemId::parse(&str) -> Option<ItemId>` — single entry from DSL / user input / legacy wire (internally may call `canonicalize_item` + structured split).
+- `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`.
+- `parent`, `display_path`, `tilde_tail` / `tilde_http_tail`, `tilde_segments`, `last_segment`, `normalized_storage` — port from `CanonicalItemUrl`.
+- **`Ord` + `Hash` + `Eq`** stable for `BTreeSet` / `HashMap` (see `write_actor` scope-rank snapshots).
+- **`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.
+
+**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`.
+
+### `RouteContext` (server HTML)
+
+- **File:** `server/src/html/routing.rs` — **`RouteContext(ThreadNav)`** with `item_href`, `item_href_raw`, `thread_url`, `garden_root_url`, `room_url`, `From`/`Into` `ThreadNav`.
+- **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`.
+
+### Axum / garden routes
+
+- **No** single catch-all route (explicit decision): keep the existing router layout in `server/src/lib.rs`.
+- 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`.
+
+## Phased execution (recommended order)
+
+### Phase 0 — Preconditions (quick)
+
+1. Read **`AGENTS.md`** (UI contract, durability matrix, `RpcCommand` vs `HtmlUiAction`).
+2. Run **`cargo test --workspace`** and **`./scripts/clj-test.sh`** on clean `main` before large diffs; repeat after each phase.
+
+### Phase 1 — `ItemId` in `slug-types` (no server yet)
+
+1. Add **`ItemId`** (new file e.g. `types/src/item_id.rs` **or** inline at bottom of `paths.rs` — see **Module cycle** below).
+2. Implement **`ItemId::parse`** using existing **`canonicalize_item`** + normalization; port **`CanonicalItemUrl`** methods to **`ItemId`** with tests ported from `paths.rs` `#[cfg(test)] mod tests`.
+3. **`GardenItemUrl::from_stored(&ItemId, room_wire)`** (and thread helpers) — build absolute hrefs from structure, not from re-parsing a canonical string.
+4. **`TildeHttpPathTail::to_item_id`** (rename from `to_canonical`) / **`tilde_http_path_to_item_id`**.
+5. **`TildeOntologyPath::from_stored(&ItemId)`**.
+6. Export **`ItemId`** from **`types/src/lib.rs`**; update **`server/src/path_types.rs`** re-exports.
+7. **Delete `CanonicalItemUrl`** and fix all **in-crate** references in `types` only until `cargo test` passes for `slug-types`.
+
+**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:**
+
+- **A)** Put `ItemId` **inside `paths.rs`** below `canonicalize_item` / helpers (simplest, large file), or  
+- **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).
+
+### Phase 2 — Reducer + ranking (server core)
+
+1. **`server/src/reducer.rs`**: `ContentState` / `GroupState` / **`VoteData`** — replace **`CanonicalItemUrl`** with **`ItemId`** on all maps, sets, deques, vectors.
+2. **`apply_vote`**: normalize `a`/`b` via **`ItemId::parse`** or **`ItemId`**-aware logic (remove string round-trip).
+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.
+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`**.
+5. **`server/tests/basic.rs`** and any reducer tests constructing **`VoteData`** — use **`ItemId::parse(...).unwrap()`** or helpers.
+
+### Phase 3 — RPC + search + external resolver
+
+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).
+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.
+3. **`server/src/external_resolver.rs`**: take **`&ItemId`** or **`ItemId::external_url()`** instead of **`&CanonicalItemUrl`**.
+
+### Phase 4 — HTML / Maud
+
+1. **`ThreadNav::garden_item_url`**: overload or replace with **`garden_item_href(&self, item: &ItemId)`** (no `CanonicalItemUrl::parse` inside).
+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).
+3. **`server/src/html/garden.rs`**, **`breadcrumb_path.rs`**, **`forum/*`**, **`editor.rs`**: replace **`CanonicalItemUrl`** with **`ItemId`**; breadcrumbs should walk **`ItemId::parent`** without string `rsplit`.
+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.
+
+### Phase 5 — Cleanup + docs
+
+1. Remove dead **`canonical_path`** / **`breadcrumb_path`** string logic if fully superseded.
+2. Update **`AGENTS.md`** if durability, `POST /ui`, or command surfaces change.
+3. Delete or shrink **`plan.md`** when done.
+
+## File / symbol checklist (non-exhaustive — grep-driven)
+
+Run periodically:
+
+```bash
+rg "CanonicalItemUrl" -g'*.rs'
+rg "path_types::CanonicalItemUrl" -g'*.rs'
+rg "tilde_http_path_to_canonical" -g'*.rs'
+```
+
+**High-touch files (from prior exploration):**
+
+| Area | Files |
+|------|--------|
+| 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` |
+| Server re-exports | `server/src/path_types.rs`, `server/src/canonical_path.rs` |
+| Reducer / ingest | `server/src/reducer.rs`, `server/src/dsl.rs` (parse output types if changed) |
+| Ranking | `server/src/ranking.rs`, `server/src/scope_rank.rs` |
+| Writer / RPC | `server/src/api/write_actor.rs`, `server/src/api/rpc.rs`, `server/src/api/helpers.rs`, `server/src/api/validate.rs` |
+| 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`, … |
+| Tests | `server/tests/basic.rs`, `server/tests/integration.rs`, `types/src/paths.rs` tests, Clojure under `test/` if URLs/assertions mention canonical shapes |
+
+## Events / JSONL
+
+- **`Ingest`** events store **`raw` DSL** only — no change required for item identity inside the event.
+- 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`.
+
+## `nav!` macro (`server/src/paths.rs`)
+
+- Macros use **`keypath($key)`** with **`.clone()`** — **`ItemId`** must be **`Clone`** (already for enums). Remove any reliance on **`Borrow<str>`** for map keys.
+
+## Testing gate
+
+After each phase:
+
+```bash
+cargo test --workspace
+./scripts/clj-test.sh
+```
+
+## Risks / gotchas
+
+1. **`Ord` on `ItemId`**: must match prior **`CanonicalItemUrl`** / `String` ordering wherever **`BTreeSet`** is used (e.g. deterministic scope-rank snapshots in **`write_actor`**).
+2. **External `ItemId`**: **`Url`** equality / hashing — normalization is already centralized in **`url_normalize`**; ensure **`ItemId::parse`** always inserts normalized **`Url`** into **`External`**.
+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.
+4. **Serde**: tests and any RPC clients that snapshot JSON may need expectation updates if **`VoteData`** shape changes.
+
+## Optional follow-ups (not blocking `ItemId`)
+
+- More **domain normalizers** in **`url_normalize.rs`** (e.g. `music.youtube.com`, Spotify, etc.).
+- **Room wire** vs **HTTP segment** helpers already in **`paths.rs`** (`ROOM_SHORT_ID_LEN`, `room_route_segment`, `room_id_from_route_segment`).
+
+---
+
+**End state criteria:** `rg CanonicalItemUrl` returns nothing; reducer maps use **`ItemId`**; HTML link generation for items goes through **`RouteContext` + `ItemId`**; tests and Kaocha green.
diff --git a/server/src/html/mod.rs b/server/src/html/mod.rs
index c3dccd03dc6da2a2f6f6fa828657e33a951884b

… preview truncated; 2,831 characters omitted

download full diff A

B — c_59974b9da42a (tommy-mor)

message

[c99adc26] refactor forum into files

diff preview

diff --git a/bb.edn b/bb.edn
index 4680e82d4227057d2eea6041dc5647beb759131d..ce0f6fcd45a67ead3295b90db2a301e9b304f3da 100644
--- a/bb.edn
+++ b/bb.edn
@@ -51,6 +51,11 @@
    :requires ([test.walkthrough-fixture :as walkthrough-fixture])
    :task (walkthrough-fixture/run-fixture)}
 
+  sample-fixture
+  {:doc "macOS: run `sample` on process(es) listening on the fixture TCP port (default 8080). Usage: bb sample-fixture [PORT] [DURATION_SEC] [OUT_DIR]"
+   :requires ([scripts.sample-fixture :as sample-fixture])
+   :task (apply sample-fixture/-main *command-line-args*)}
+
   perf
   {:doc "Performance test: concurrent HTTP requests to detect blocking I/O"
    :requires ([scripts.perf :as perf])
diff --git a/scripts/sample_fixture.bb b/scripts/sample_fixture.bb
new file mode 100644
index 0000000000000000000000000000000000000000..ac2368623c5043ba6e027afef6b5b37d392767b0
--- /dev/null
+++ b/scripts/sample_fixture.bb
@@ -0,0 +1,70 @@
+(ns scripts.sample-fixture
+  "Find process(es) listening on the fixture port (default 8080) and run macOS `sample`."
+  (:require [babashka.fs :as fs]
+            [babashka.process :as p]
+            [clojure.string :as str]))
+
+(defn- usage []
+  (println "Usage: bb sample-fixture [PORT] [DURATION_SEC] [OUT_DIR]")
+  (println "")
+  (println "  Finds PIDs bound to TCP LISTEN on PORT (default 8080), then runs")
+  (println "  `sample` for each PID. OUT_DIR defaults to the current directory.")
+  (println "")
+  (println "  Example:  bb sample-fixture")
+  (println "            bb sample-fixture 8080 10")
+  (println "            bb sample-fixture 8080 5 /tmp")
+  (println "")
+  (println "  Requires macOS (the `sample` tool)."))
+
+(defn- parse-long* [s]
+  (try (Long/parseLong s)
+       (catch NumberFormatException _ nil)))
+
+(defn- listen-pids [port]
+  (let [spec (str "TCP:" port)
+        {:keys [out exit]}
+        @(p/process ["lsof" "-nP" (str "-i" spec) "-sTCP:LISTEN" "-t"]
+                    {:out :string :err :string})]
+    (when (zero? exit)
+      (->> (str/split-lines out)
+           (map str/trim)
+           (remove str/blank?)
+           (distinct)
+           vec))))
+
+(defn- sample-bin []
+  (or (fs/which "sample")
+      (throw (ex-info "macOS `sample` not found on PATH" {}))))
+
+(defn- run-sample! [sample duration-sec pid out-file]
+  (println (str "sampling PID " pid " for " duration-sec "s → " out-file))
+  (let [{:keys [exit err]} @(p/process [sample (str pid) (str duration-sec) "-file" out-file]
+                                      {:out :inherit :err :inherit})]
+    (when-not (zero? exit)
+      (binding [*out* *err*]
+        (println "sample failed:" err))
+      (System/exit exit))))
+
+(defn -main [& args]
+  (when (some #{"-h" "--help" "help"} args)
+    (usage)
+    (System/exit 0))
+  (let [port (or (some-> (first args) parse-long*) 8080)
+        duration-sec (or (some-> (second args) parse-long*) 5)
+        out-dir (or (nth args 2 nil) ".")
+        pids (listen-pids port)]
+    (when (or (nil? pids) (empty? pids))
+      (binding [*out* *err*]
+        (println (str "No process listening on TCP " port " (LISTEN). Is `bb fixture` running?")))
+      (System/exit 1))
+    (when-not (fs/exists? out-dir)
+      (binding [*out* *err*]
+        (println "Output directory does not exist:" out-dir))
+      (System/exit 1))
+    (let [sample (sample-bin)
+          ts (str (System/currentTimeMillis))]
+      (println (str "port " port " → PIDs " (str/join ", " pids)))
+      (doseq [pid pids]
+        (let [out-file (str (fs/path out-dir) "/slug-sample-" port "-" pid "-" ts ".txt")]
+          (run-sample! sample duration-sec pid (str out-file))))
+      (println "done."))))
diff --git a/server/src/html/forum.rs b/server/src/html/forum.rs
index a55fc1f79d03719eb74b216865b2c15199c48ea7..5ad8dfc84dd735d589432e2c613ff687a75f2e61 100644
--- a/server/src/html/forum.rs
+++ b/server/src/html/forum.rs
@@ -380,22 +380,6 @@ fn room_members_inner(members: &[RoomMemberRow]) -> Markup {
     }
 }
 
-pub(crate) fn set_room_members_expanded_rpc(room_wire: &str, expanded: bool) -> String {
-    template_json_compact(&HtmlUiAction::SetRoomMembersExpanded {
-        room_wire: room_wire.to_string(),
-        expanded,
-    })
-    .expect("static json")
-}
-
-pub(crate) fn set_room_new_thread_compose_expanded_rpc(nav: &ThreadNav, expanded: bool) -> String {
-    template_json_compact(&HtmlUiAction::SetRoomNewThreadComposeExpanded {
-        room_wire: nav.room_wire.clone(),
-        expanded,
-    })
-    .expect("static json")
-}
-
 /// Fragment for `#room-members-section` — expand/collapse is server-driven via `POST /ui`.
 pub(crate) fn room_members_section_markup(
     reduced: &ReducerState,
@@ -406,13 +390,14 @@ pub(crate) fn room_members_section_markup(
     if members.is_empty() {
         return html! {};
     }
-    let rpc_open = set_room_members_expanded_rpc(room_id, true);
-    let rpc_close = set_room_members_expanded_rpc(room_id, false);
     html! {
         div id="room-members-section" {
             @if members_expanded {
                 form method="POST" action="/ui" {
-                    input type="hidden" name=(UI_RPC_FIELD) value=(rpc_close);
+                    input type="hidden" name=(UI_RPC_FIELD) value=(template_json_compact(&HtmlUiAction::SetRoomMembersExpanded {
+                        room_wire: room_id.to_string(),
+                        expanded: false,
+                    }).expect("static json"));
                     button type="submit" class="form-toggle" aria-expanded="true" {
                         "hide members & permissions"
                     }
@@ -422,7 +407,10 @@ pub(crate) fn room_members_section_markup(
                 }
             } @else {
                 form method="POST" action="/ui" {
-                    input type="hidden" name=(UI_RPC_FIELD) value=(rpc_open);
+                    input type="hidden" name=(UI_RPC_FIELD) value=(template_json_compact(&HtmlUiAction::SetRoomMembersExpanded {
+                        room_wire: room_id.to_string(),
+                        expanded: true,
+                    }).expect("static json"));
                     button type="submit" class="form-toggle" aria-expanded="false" {
                         "members & permissions"
                     }
@@ -514,28 +502,24 @@ fn compose_form(nav: &ThreadNav, thread_tag: &str, show: bool) -> Markup {
     if !show {
         return html! {};
     }
-    let rpc_post = template_json_compact(&json!({
-        "action": "post_ingest",
-        "room": nav.room_wire,
-        "thread_tag": thread_tag,
-        "text": {"$form": "text"},
-        "error_target": "thread-compose-errors",
-        "form_id": "thread-compose-form",
-    }))
-    .unwrap();
-    let rpc_check = template_json_compact(&json!({
-        "action": "check_ingest",
-        "room": nav.room_wire,
-        "thread_tag": thread_tag,
-        "text": {"$form": "text"},
-        "error_target": "thread-compose-errors",
-        "form_id": "thread-compose-form",
-    }))
-    .unwrap();
     html! {
         section class="compose" id="thread-compose" {
-            form id="thread-compose-form" method="POST" action="/ui" data-check-action="/ui" data-check-rpc=(rpc_check) {
-                input type="hidden" name=(UI_RPC_FIELD) value=(rpc_post);
+            form id="thread-compose-form" method="POST" action="/ui" data-check-action="/ui" data-check-rpc=(template_json_compact(&json!({
+                "action": "check_ingest",
+                "room": nav.room_wire,
+                "thread_tag": thread_tag,
+                "text": {"$form": "text"},
+                "error_target": "thread-compose-errors",
+                "form_id": "thread-compose-form",
+            })).unwrap()) {
+                input type="hidden" name=(UI_RPC_FIELD) value=(template_json_compact(&json!({
+                    "action": "post_ingest",
+                    "room": nav.room_wire,
+                    "thread_tag": thread_tag,
+                    "text": {"$form": "text"},
+                    "error_target": "thread-compose-errors",
+                    "form_id": "thread-compose-form",
+                })).unwrap());
                 textarea name="text" rows="5" cols="80" placeholder="prose or ~/items and votes…" {}
                 p {
                     button type="submit" { "post" }
@@ -712,7 +696,7 @@ pub async fn home(
             p class="muted" { "dark = time-ordered · light = vote-ranked" }
             div class="thread-feed-toolbar" {
                 form method="POST" action="/ui" {
-                    input type="hidden" name=(UI_RPC_FIELD) value=(expand_public_new_thread_rpc_value());
+                    input type="hidden" name=(UI_RPC_FIELD) value=(template_json_compact(&HtmlUiAction::ExpandPublicNewThreadForm).expect("static json"));
                     button type="submit" class="section-add-btn" { "+" }
                 }
             }
@@ -1002,14 +986,15 @@ fn new_thread_form_for_room(nav: &ThreadNav, show: bool, compose_expanded: bool)
     if !show {
         return html! {};
     }
-    let rpc_open = set_room_new_thread_compose_expanded_rpc(nav, true);
-    let rpc_close = set_room_new_thread_compose_expanded_rpc(nav, false);
     // Single root for Idiomorph when morphing `#room-new-thread-ui-slot` (expanded has form + section).
     html! {
         div class="room-new-thread-slot-inner" {
             @if compose_expanded {
                 form method="POST" action="/ui" {
-                    input type="hidden" name=(UI_RPC_FIELD) value=(rpc_close);
+                    input type="hidden" name=(UI_RPC_FIELD) value=(template_json_compact(&HtmlUiAction::SetRoomNewThreadComposeExpanded {
+                        room_wire: nav.room_wire.clone(),
+                        expanded: false,
+                    }).expect("static json"));
                     button type="submit" class="form-toggle" aria-expanded="true" {
                         "-"
                     }
@@ -1039,7 +1024,10 @@ fn new_thread_form_for_room(nav: &ThreadNav, show: bool, compose_expanded: bool)
                 }
             } @else {
                 form method="POST" action="/ui" {
-                    input type="hidden" name=(UI_RPC_FIELD) value=(rpc_open);
+                    input type="hidden" name=(UI_RPC_FIELD) value=(template_json_compact(&HtmlUiAction::SetRoomNewThreadComposeExpanded {
+                        room_wire: nav.room_wire.clone(),
+                        expanded: true,
+                    }).expect("static json"));
                     button type="submit" class="form-toggle" aria-expanded="false" {
                         "+"
                     }
@@ -1049,10 +1037,6 @@ fn new_thread_form_for_room(nav: &ThreadNav, show: bool, compose_expanded: bool)
     }
 }
 
-pub(crate) fn expand_public_new_thread_rpc_value() -> String {
-    template_json_compact(&HtmlUiAction::ExpandPublicNewThreadForm).expect("static json")
-}
-
 pub(crate) fn login_to_post_hint_markup() -> Markup {
     html! {
         p class="muted" { "log in to post" }
diff --git a/server/src/html/forum/access.rs b/server/src/html/forum/access.rs
new file mode 100644
index 0000000000000000000000000000000000000000..f9f7139b63442a6ef3a927b77a72805f15feec3f
--- /dev/null
+++ b/server/src/html/forum/access.rs
@@ -0,0 +1,16 @@
+use crate::events::ThreadCapability;
+use crate::reducer::ReducerState;
+
+pub(crate) fn user_can_view_room(reduced: &ReducerState, room_id: &str, username: Option<&str>) -> bool {
+    if !reduced.rooms.contains(room_id) {
+        return false;
+    }
+    let Some(u) = username else {
+        return false;
+    };
+    reduced.user_has_cap(room_id, u, ThreadCapability::View)
+}
+
+pub(crate) fn user_can_post_room(reduced: &ReducerState, room_id: &str, username: &str) -> bool {
+    reduced.user_has_cap(room_id, username, ThreadCapability::Post)
+}
diff --git a/server/src/html/forum/ingest

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