refactor: migrate messaging plugins to sdk

src/channels/plugins/outbound/load.ts

@@ -1,40 +1,33 @@
 import type { ChannelId, ChannelOutboundAdapter } from "../types.js";
-import type { ChatChannelId } from "../../registry.js";
+import type { PluginRegistry } from "../../../plugins/registry.js";
 import { getActivePluginRegistry } from "../../../plugins/runtime.js";
 
-type OutboundLoader = () => Promise<ChannelOutboundAdapter>;
-
 // Channel docking: outbound sends should stay cheap to import.
 //
 // The full channel plugins (src/channels/plugins/*.ts) pull in status,
 // onboarding, gateway monitors, etc. Outbound delivery only needs chunking +
 // send primitives, so we keep a dedicated, lightweight loader here.
-const LOADERS: Record<ChatChannelId, OutboundLoader> = {
-  telegram: async () => (await import("./telegram.js")).telegramOutbound,
-  whatsapp: async () => (await import("./whatsapp.js")).whatsappOutbound,
-  discord: async () => (await import("./discord.js")).discordOutbound,
-  slack: async () => (await import("./slack.js")).slackOutbound,
-  signal: async () => (await import("./signal.js")).signalOutbound,
-  imessage: async () => (await import("./imessage.js")).imessageOutbound,
-};
-
 const cache = new Map<ChannelId, ChannelOutboundAdapter>();
+let lastRegistry: PluginRegistry | null = null;
+
+function ensureCacheForRegistry(registry: PluginRegistry | null) {
+  if (registry === lastRegistry) return;
+  cache.clear();
+  lastRegistry = registry;
+}
 
 export async function loadChannelOutboundAdapter(
   id: ChannelId,
 ): Promise<ChannelOutboundAdapter | undefined> {
+  const registry = getActivePluginRegistry();
+  ensureCacheForRegistry(registry);
   const cached = cache.get(id);
   if (cached) return cached;
-  const registry = getActivePluginRegistry();
   const pluginEntry = registry?.channels.find((entry) => entry.plugin.id === id);
   const outbound = pluginEntry?.plugin.outbound;
   if (outbound) {
     cache.set(id, outbound);
     return outbound;
   }
-  const loader = LOADERS[id as ChatChannelId];
-  if (!loader) return undefined;
-  const loaded = await loader();
-  cache.set(id, loaded);
-  return loaded;
+  return undefined;
 }