feat: add shared email footer and send_email MCP tool

CLAUDE.md

@@ -10,6 +10,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 2. Push commits to the current feature branch
 3. **NEVER push directly to `main` or `test` branches** - always use feature branches and PRs
 4. Before pushing, verify the current branch is not `main` or `test`
+5. **Open PRs against the `test` branch**, not `main`
 
 ### Starting a New Task
 

lib/const.ts

@@ -18,7 +18,7 @@ export const INBOUND_EMAIL_DOMAIN = "@mail.recoupable.com";
 /** Domain for sending outbound emails (e.g., [email protected]) */
 export const OUTBOUND_EMAIL_DOMAIN = "@recoupable.com";
 
-export const SUPABASE_STORAGE_BUCKET = "user-files";
-
-/** Default from address for outbound emails sent by the agent */
+/** Default from address for outbound emails */
 export const RECOUP_FROM_EMAIL = `Agent by Recoup <agent${OUTBOUND_EMAIL_DOMAIN}>`;
+
+export const SUPABASE_STORAGE_BUCKET = "user-files";

lib/emails/__tests__/getEmailFooter.test.ts

@@ -0,0 +1,41 @@
+import { describe, expect, it } from "vitest";
+import { getEmailFooter } from "../getEmailFooter";
+
+describe("getEmailFooter", () => {
+  it("includes reply note in all cases", () => {
+    const footer = getEmailFooter();
+    expect(footer).toContain("you can reply directly to this email");
+  });
+
+  it("includes horizontal rule", () => {
+    const footer = getEmailFooter();
+    expect(footer).toContain("<hr");
+  });
+
+  it("excludes chat link when roomId is not provided", () => {
+    const footer = getEmailFooter();
+    expect(footer).not.toContain("chat.recoupable.com");
+    expect(footer).not.toContain("Or continue the conversation");
+  });
+
+  it("includes chat link when roomId is provided", () => {
+    const roomId = "test-room-123";
+    const footer = getEmailFooter(roomId);
+    expect(footer).toContain(`https://chat.recoupable.com/chat/${roomId}`);
+    expect(footer).toContain("Or continue the conversation on Recoup");
+  });
+
+  it("generates proper HTML with roomId", () => {
+    const roomId = "my-room-id";
+    const footer = getEmailFooter(roomId);
+    expect(footer).toContain(`href="https://chat.recoupable.com/chat/${roomId}"`);
+    expect(footer).toContain('target="_blank"');
+    expect(footer).toContain('rel="noopener noreferrer"');
+  });
+
+  it("applies proper styling", () => {
+    const footer = getEmailFooter("room-id");
+    expect(footer).toContain("font-size:12px");
+    expect(footer).toContain("color:#6b7280");
+  });
+});

lib/emails/getEmailFooter.ts

@@ -0,0 +1,27 @@
+/**
+ * Generates a standardized email footer HTML.
+ *
+ * @param roomId - Optional room ID for the chat link. If not provided, only the reply note is shown.
+ * @returns HTML string for the email footer.
+ */
+export function getEmailFooter(roomId?: string): string {
+  const replyNote = `
+<p style="font-size:12px;color:#6b7280;margin:0 0 4px;">
+  Note: you can reply directly to this email to continue the conversation.
+</p>`.trim();
+
+  const chatLink = roomId
+    ? `
+<p style="font-size:12px;color:#6b7280;margin:0;">
+  Or continue the conversation on Recoup:
+  <a href="https://chat.recoupable.com/chat/${roomId}" target="_blank" rel="noopener noreferrer">
+    https://chat.recoupable.com/chat/${roomId}
+  </a>
+</p>`.trim()
+    : "";
+
+  return `
+<hr style="margin-top:24px;margin-bottom:16px;border:none;border-top:1px solid #e5e7eb;" />
+${replyNote}
+${chatLink}`.trim();
+}

lib/emails/inbound/generateEmailResponse.ts

@@ -2,6 +2,7 @@ import { marked } from "marked";
 import { ChatRequestBody } from "@/lib/chat/validateChatRequest";
 import getGeneralAgent from "@/lib/agents/generalAgent/getGeneralAgent";
 import { getEmailRoomMessages } from "@/lib/emails/inbound/getEmailRoomMessages";
+import { getEmailFooter } from "@/lib/emails/getEmailFooter";
 
 /**
  * Generates the assistant response HTML for an email, including:
@@ -29,20 +30,7 @@ export async function generateEmailResponse(
   const text = chatResponse.text;
 
   const bodyHtml = marked(text);
-
-  const footerHtml = `
-<hr style="margin-top:24px;margin-bottom:16px;border:none;border-top:1px solid #e5e7eb;" />
-<p style="font-size:12px;color:#6b7280;margin:0 0 4px;">
-  Note: you can reply directly to this email to continue the conversation.
-</p>
-<p style="font-size:12px;color:#6b7280;margin:0;">
-  Or continue the conversation on Recoup:
-  <a href="https://chat.recoupable.com/chat/${roomId}" target="_blank" rel="noopener noreferrer">
-    https://chat.recoupable.com/chat/${roomId}
-  </a>
-</p>
-`.trim();
-
+  const footerHtml = getEmailFooter(roomId);
   const html = `${bodyHtml}\n\n${footerHtml}`;
 
   return { text, html };

lib/emails/sendEmailSchema.ts

@@ -24,6 +24,10 @@ export const sendEmailSchema = z.object({
     .describe("Optional custom headers for the email")
     .default({})
     .optional(),
+  room_id: z
+    .string()
+    .describe("Optional room ID to include in the email footer link")
+    .optional(),
 });
 
 export type SendEmailInput = z.infer<typeof sendEmailSchema>;

lib/mcp/tools/__tests__/registerSendEmailTool.test.ts

@@ -49,8 +49,7 @@ describe("registerSendEmailTool", () => {
       to: ["[email protected]"],
       cc: undefined,
       subject: "Test Subject",
-      text: "Test body",
-      html: undefined,
+      html: expect.stringMatching(/Test body.*you can reply directly to this email/s),
       headers: {},
     });
 

lib/mcp/tools/index.ts

@@ -33,8 +33,8 @@ export const registerAllTools = (server: McpServer): void => {
   registerContactTeamTool(server);
   registerGetLocalTimeTool(server);
   registerSearchWebTool(server);
+  registerSendEmailTool(server);
   registerUpdateAccountInfoTool(server);
   registerCreateSegmentsTool(server);
   registerAllYouTubeTools(server);
-  registerSendEmailTool(server);
 };

lib/mcp/tools/registerSendEmailTool.ts

@@ -4,6 +4,7 @@ import { sendEmailWithResend } from "@/lib/emails/sendEmail";
 import { getToolResultSuccess } from "@/lib/mcp/getToolResultSuccess";
 import { getToolResultError } from "@/lib/mcp/getToolResultError";
 import { RECOUP_FROM_EMAIL } from "@/lib/const";
+import { getEmailFooter } from "@/lib/emails/getEmailFooter";
 import { NextResponse } from "next/server";
 
 /**
@@ -20,15 +21,18 @@ export function registerSendEmailTool(server: McpServer): void {
       inputSchema: sendEmailSchema,
     },
     async (args: SendEmailInput) => {
-      const { to, cc = [], subject, text, html = "", headers = {} } = args;
+      const { to, cc = [], subject, text, html = "", headers = {}, room_id } = args;
+
+      const footer = getEmailFooter(room_id);
+      const bodyHtml = html || (text ? `<p>${text}</p>` : "");
+      const htmlWithFooter = `${bodyHtml}\n\n${footer}`;
 
       const result = await sendEmailWithResend({
         from: RECOUP_FROM_EMAIL,
         to,
         cc: cc.length > 0 ? cc : undefined,
         subject,
-        text,
-        html: html || undefined,
+        html: htmlWithFooter,
         headers,
       });