Outbound: allow text-only plugin adapters

src/infra/outbound/deliver.test.ts

@@ -890,6 +890,37 @@ describe("deliverOutboundPayloads", () => {
     expect(results).toEqual([{ channel: "line", messageId: "ln-1" }]);
   });
 
+  it("falls back to sendText when plugin outbound omits sendMedia", async () => {
+    const sendText = vi.fn().mockResolvedValue({ channel: "matrix", messageId: "mx-1" });
+    setActivePluginRegistry(
+      createTestRegistry([
+        {
+          pluginId: "matrix",
+          source: "test",
+          plugin: createOutboundTestPlugin({
+            id: "matrix",
+            outbound: { deliveryMode: "direct", sendText },
+          }),
+        },
+      ]),
+    );
+
+    const results = await deliverOutboundPayloads({
+      cfg: {},
+      channel: "matrix",
+      to: "!room:1",
+      payloads: [{ text: "caption", mediaUrl: "https://example.com/file.png" }],
+    });
+
+    expect(sendText).toHaveBeenCalledTimes(1);
+    expect(sendText).toHaveBeenCalledWith(
+      expect.objectContaining({
+        text: "caption",
+      }),
+    );
+    expect(results).toEqual([{ channel: "matrix", messageId: "mx-1" }]);
+  });
+
   it("emits message_sent failure when delivery errors", async () => {
     hookMocks.runner.hasHooks.mockReturnValue(true);
     const sendWhatsApp = vi.fn().mockRejectedValue(new Error("downstream failed"));

src/infra/outbound/deliver.ts

@@ -149,7 +149,7 @@ function createPluginHandler(
   params: ChannelHandlerParams & { outbound?: ChannelOutboundAdapter },
 ): ChannelHandler | null {
   const outbound = params.outbound;
-  if (!outbound?.sendText || !outbound?.sendMedia) {
+  if (!outbound?.sendText) {
     return null;
   }
   const baseCtx = createChannelOutboundContextBase(params);
@@ -183,12 +183,19 @@ function createPluginHandler(
         ...resolveCtx(overrides),
         text,
       }),
-    sendMedia: async (caption, mediaUrl, overrides) =>
-      sendMedia({
+    sendMedia: async (caption, mediaUrl, overrides) => {
+      if (sendMedia) {
+        return sendMedia({
+          ...resolveCtx(overrides),
+          text: caption,
+          mediaUrl,
+        });
+      }
+      return sendText({
         ...resolveCtx(overrides),
         text: caption,
-        mediaUrl,
-      }),
+      });
+    },
   };
 }