fix(notifications): strip configured phrase from reminder subject (OUT-3919)

For subject-override workspaces the reminder email subject is derived from
the task title. Strip a configurable substring from it via the SUBJECT_REPLACE
/ SUBJECT_REPLACE_TARGET env vars instead of hardcoding workspace-specific
phrasing. Falls back to the raw title when unset, and guards against a nullish
title.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: priosshrsth

src/config/index.ts

@@ -50,6 +50,12 @@ export const showQueries = (() => {
 
 export const assemblyApiDomain = z.string().url().parse(process.env.NEXT_PUBLIC_ASSEMBLY_API_DOMAIN)
 
+// Substring stripped from the task title when building the reminder email subject for
+// subject-override workspaces, and the value it's replaced with. Configured via env so the
+// workspace-specific phrasing isn't hardcoded (OUT-3919).
+export const reminderSubjectSearch = process.env.REMINDER_SUBJECT_SEARCH || ''
+export const reminderSubjectReplacement = process.env.REMINDER_SUBJECT_REPLACEMENT || ''
+
 // Workspaces whose single reminder emails use the task title as the subject, prefixed with the
 // escalating cadence tag (OUT-3861). Comma-separated workspace ids, e.g. C1: us-west-2_lg5zB-Utp.
 export const reminderSubjectOverrideWorkspaces = new Set(

src/jobs/notifications/send-reminder-email.test.ts

@@ -3,7 +3,11 @@ import { CopilotAPI } from '@/utils/CopilotAPI'
 import { TaskReminderType } from '@prisma/client'
 import { sendReminderEmail } from './send-reminder-email'
 
-jest.mock('@/config', () => ({ reminderSubjectOverrideWorkspaces: new Set(['ws_override']) }))
+jest.mock('@/config', () => ({
+  reminderSubjectOverrideWorkspaces: new Set(['ws_override']),
+  reminderSubjectSearch: ': Capital One',
+  reminderSubjectReplacement: ':',
+}))
 
 const workspace: WorkspaceResponse = {
   id: 'ws_1',
@@ -138,6 +142,23 @@ describe('sendReminderEmail', () => {
     expect(payload.deliveryTargets.email.title).toBe('View task')
   })
 
+  it('strips the configured search phrase from the subject for override workspaces', async () => {
+    const createNotification = jest.fn().mockResolvedValue({ id: 'notif_6', createdAt: '2026-05-25T00:00:00Z' })
+
+    await sendReminderEmail({
+      task: { ...task, title: 'Quarterly review: Capital One' },
+      recipientClientId: 'client_1',
+      recipientCompanyId: 'company_1',
+      reminderType: TaskReminderType.DUE_DATE_OVERDUE_3D,
+      isCompanyRecipient: false,
+      workspace: { ...workspace, id: 'ws_override' },
+      copilot: buildCopilotMock(createNotification),
+    })
+
+    const payload = createNotification.mock.calls[0][0]
+    expect(payload.deliveryTargets.email.subject).toBe('[Overdue] Quarterly review:')
+  })
+
   it('keeps the generic subject for workspaces not in the override set', async () => {
     const createNotification = jest.fn().mockResolvedValue({ id: 'notif_5', createdAt: '2026-05-25T00:00:00Z' })
 

src/jobs/notifications/send-reminder-email.ts

@@ -1,7 +1,7 @@
 import 'server-only'
 
 import { getReminderEmailDetails, REMINDER_ESCALATION_TAG } from '@/app/api/notification/notification.helpers'
-import { reminderSubjectOverrideWorkspaces } from '@/config'
+import { reminderSubjectOverrideWorkspaces, reminderSubjectSearch, reminderSubjectReplacement } from '@/config'
 import { NotificationRequestBody, WorkspaceResponse } from '@/types/common'
 import { CopilotAPI } from '@/utils/CopilotAPI'
 import { Task, TaskReminderType } from '@prisma/client'
@@ -29,10 +29,13 @@ export const sendReminderEmail = async ({
 }: SendReminderEmailArgs): Promise<string> => {
   const details = getReminderEmailDetails(workspace, task, isCompanyRecipient)[reminderType]
 
+  const replacedSubjectTitle = reminderSubjectSearch
+    ? task.title.replace(reminderSubjectSearch, reminderSubjectReplacement)
+    : task.title
   // For opted-in workspaces, mirror the customized assignment email by using the task title as the
   // subject, prefixed with the escalating cadence tag (OUT-3861).
   const subject = reminderSubjectOverrideWorkspaces.has(workspace.id)
-    ? `${REMINDER_ESCALATION_TAG[reminderType]} ${task.title}`
+    ? `${REMINDER_ESCALATION_TAG[reminderType]} ${replacedSubjectTitle}`
     : details.subject
 
   const payload: NotificationRequestBody = {