fix(channels): parse bundled targets without plugin registry

src/channels/plugins/target-parsing.test.ts

@@ -0,0 +1,59 @@
+import { beforeEach, describe, expect, it } from "vitest";
+import { setActivePluginRegistry } from "../../plugins/runtime.js";
+import { createTestRegistry } from "../../test-utils/channel-plugins.js";
+import { parseExplicitTargetForChannel } from "./target-parsing.js";
+
+describe("parseExplicitTargetForChannel", () => {
+  beforeEach(() => {
+    setActivePluginRegistry(createTestRegistry([]));
+  });
+
+  it("parses bundled Telegram targets without an active Telegram registry entry", () => {
+    expect(parseExplicitTargetForChannel("telegram", "telegram:group:-100123:topic:77")).toEqual({
+      to: "-100123",
+      threadId: 77,
+      chatType: "group",
+    });
+    expect(parseExplicitTargetForChannel("telegram", "-100123")).toEqual({
+      to: "-100123",
+      chatType: "group",
+    });
+  });
+
+  it("parses registered non-bundled channel targets via the active plugin contract", () => {
+    setActivePluginRegistry(
+      createTestRegistry([
+        {
+          pluginId: "msteams",
+          source: "test",
+          plugin: {
+            id: "msteams",
+            meta: {
+              id: "msteams",
+              label: "Microsoft Teams",
+              selectionLabel: "Microsoft Teams",
+              docsPath: "/channels/msteams",
+              blurb: "test stub",
+            },
+            capabilities: { chatTypes: ["direct"] },
+            config: {
+              listAccountIds: () => [],
+              resolveAccount: () => ({}),
+            },
+            messaging: {
+              parseExplicitTarget: ({ raw }: { raw: string }) => ({
+                to: raw.trim().toUpperCase(),
+                chatType: "direct" as const,
+              }),
+            },
+          },
+        },
+      ]),
+    );
+
+    expect(parseExplicitTargetForChannel("msteams", "team-room")).toEqual({
+      to: "TEAM-ROOM",
+      chatType: "direct",
+    });
+  });
+});

src/channels/plugins/target-parsing.ts

@@ -1,4 +1,7 @@
+import { parseDiscordTarget } from "../../../extensions/discord/src/targets.js";
+import { parseTelegramTarget } from "../../../extensions/telegram/src/targets.js";
 import type { ChatType } from "../chat-type.js";
+import { normalizeChatChannelId } from "../registry.js";
 import { getChannelPlugin, normalizeChannelId } from "./registry.js";
 
 export type ParsedChannelExplicitTarget = {
@@ -11,10 +14,28 @@ function parseWithPlugin(
   rawChannel: string,
   rawTarget: string,
 ): ParsedChannelExplicitTarget | null {
-  const channel = normalizeChannelId(rawChannel);
+  const channel = normalizeChatChannelId(rawChannel) ?? normalizeChannelId(rawChannel);
   if (!channel) {
     return null;
   }
+  if (channel === "telegram") {
+    const target = parseTelegramTarget(rawTarget);
+    return {
+      to: target.chatId,
+      ...(target.messageThreadId != null ? { threadId: target.messageThreadId } : {}),
+      ...(target.chatType === "unknown" ? {} : { chatType: target.chatType }),
+    };
+  }
+  if (channel === "discord") {
+    const target = parseDiscordTarget(rawTarget, { defaultKind: "channel" });
+    if (!target) {
+      return null;
+    }
+    return {
+      to: target.id,
+      chatType: target.kind === "user" ? "direct" : "channel",
+    };
+  }
   return getChannelPlugin(channel)?.messaging?.parseExplicitTarget?.({ raw: rawTarget }) ?? null;
 }