huskies: merge 1163 story Replace perm_rx lock-as-presence-signal with a permission router

server/src/http/context.rs

@@ -96,6 +96,16 @@ impl AppContext {
         let (watcher_tx, _) = broadcast::channel(64);
         let (reconciliation_tx, _) = broadcast::channel(64);
         let (perm_tx, perm_rx) = mpsc::unbounded_channel();
+        let permission_registry = crate::service::permission_router::ResponderRegistry::new();
+        // Plain `#[test]` fns (no tokio runtime) construct `AppContext` too;
+        // skip spawning when there's no reactor to spawn onto since those
+        // tests never exercise the permission plumbing.
+        if tokio::runtime::Handle::try_current().is_ok() {
+            crate::service::permission_router::spawn_permission_router(
+                perm_rx,
+                Arc::clone(&permission_registry),
+            );
+        }
         let timer_store = Arc::new(TimerStore::load(
             project_root.join(".huskies").join("timers.json"),
         ));
@@ -112,10 +122,8 @@ impl AppContext {
             bot_name: "Assistant".to_string(),
             bot_user_id: String::new(),
             ambient_rooms: Arc::new(std::sync::Mutex::new(std::collections::HashSet::new())),
-            perm_rx: Arc::new(tokio::sync::Mutex::new(perm_rx)),
-            pending_perm_replies: Arc::new(tokio::sync::Mutex::new(
-                std::collections::HashMap::new(),
-            )),
+            permission_registry,
+            pending_perm_replies: crate::service::permission_router::PendingPermReplies::new(),
             permission_timeout_secs: 120,
             status: agents.status_broadcaster(),
             chat_dispatcher: Arc::new(crate::chat::dispatcher::ChatDispatcher::new(1_500)),