diff --git a/README.md b/README.md
index 795bb8c..48dfc4a 100644
--- a/README.md
+++ b/README.md
@@ -121,7 +121,7 @@ Open [http://localhost:3000](http://localhost:3000). You'll see the CorvEd landi
 
 ---
 
-### What the app can do right now (after E10)
+### What the app can do right now (after E11)
 
 | Area | Status |
 |---|---|
@@ -194,7 +194,16 @@ Open [http://localhost:3000](http://localhost:3000). You'll see the CorvEd landi
 | **Tutor: sessions list** | ✅ `app/tutor/sessions/page.tsx` — upcoming and past sessions in tutor's timezone; student name, subject, Meet link; `SessionCompleteForm` inline on each upcoming session card |
 | **Tutor: session completion form** | ✅ `components/dashboards/SessionCompleteForm.tsx` — radio buttons (Done / Student No-show / My No-show), notes textarea, calls `tutor_update_session` RPC via server action; error state; success state |
 | **DB: increment_sessions_used guard** | ✅ `supabase/migrations/20260225000003_increment_sessions_used_guard.sql` — adds `sessions_used < sessions_total` safety guard to prevent `sessions_used` from exceeding `sessions_total` (over-incrementing); restricts direct RPC access to `service_role` only |
-| WhatsApp templates (E11) | 🚧 Coming in E11 |
+| WhatsApp templates (E11) | ✅ `lib/whatsapp/templates.ts` — 14 typed template functions (greeting, intake, packages, paybank, paid, tutorAvailCheck, matched, rem1h, reschedAck, reschedConfirmed, lateJoin, studentNoShow, tutorNoShow, renewalReminder) |
+| WhatsApp link builder (E11) | ✅ `lib/whatsapp/buildLink.ts` — `buildWaLink(number, message?)` strips non-digits, returns `wa.me/` URL with optional `?text=` parameter |
+| WhatsApp `CopyMessageButton` component (E11) | ✅ `components/CopyMessageButton.tsx` — "📋 Copy message" button with ✅ Copied! toast + optional "💬 Open WhatsApp" link to `wa.me` with pre-filled text |
+| WhatsApp `WhatsAppLink` component (E11) | ✅ `components/WhatsAppLink.tsx` — standalone "💬 Open WhatsApp" link; graceful fallback when number is absent |
+| Admin: WhatsApp actions on match detail (E11) | ✅ `/admin/matches/[id]` — "Copy matched message", "Copy 1-hour reminder (student/tutor)", "Copy tutor availability check" buttons; "Open chat" links next to student/tutor numbers |
+| Admin: WhatsApp actions on payments (E11) | ✅ `/admin/payments` — "Copy payment confirmed" and "Copy payment instructions" buttons + "Open chat" link per payment row |
+| Admin: WhatsApp actions on sessions (E11) | ✅ `/admin/sessions` — per session: "Copy 1-hour reminder", "Copy late join follow-up", "Copy student no-show notice", "Copy tutor no-show apology", "Copy reschedule confirmed" buttons |
+| Admin: WhatsApp link on users page (E11) | ✅ `/admin/users` — "Open chat" link next to each user's WhatsApp number |
+| Admin: WhatsApp link on request detail (E11) | ✅ `/admin/requests/[id]` — "Open chat" link next to student's WhatsApp number |
+| Admin: WhatsApp link on tutor detail (E11) | ✅ `/admin/tutors/[id]` — "Open chat" link next to tutor's WhatsApp number |
 
 ---
 
diff --git a/app/admin/matches/[id]/page.tsx b/app/admin/matches/[id]/page.tsx
index cdd1917..e76df56 100644
--- a/app/admin/matches/[id]/page.tsx
+++ b/app/admin/matches/[id]/page.tsx
@@ -1,5 +1,5 @@
-// E7 T7.4 S7.2 E8 T8.1: Admin match detail page — view match, reassign tutor, edit schedule, generate sessions
-// Closes #50 #46 #54
+// E7 T7.4 S7.2 E8 T8.1 E11 T11.2: Admin match detail page — view match, reassign tutor, edit schedule, generate sessions, WhatsApp actions
+// Closes #50 #46 #54 #75
 
 export const dynamic = 'force-dynamic'
 
@@ -9,6 +9,9 @@ import { createAdminClient } from '@/lib/supabase/admin'
 import { fetchApprovedTutors } from '@/lib/services/matching'
 import { LEVEL_LABELS } from '@/lib/utils/request'
 import { ReassignTutorForm, EditMatchForm, GenerateSessionsForm } from './MatchActions'
+import { CopyMessageButton } from '@/components/CopyMessageButton'
+import { WhatsAppLink } from '@/components/WhatsAppLink'
+import { templates } from '@/lib/whatsapp/templates'
 
 const DAY_NAMES = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']
 
@@ -97,6 +100,46 @@ export default async function AdminMatchDetailPage({
       ? request.for_student_name
       : (studentProfile?.display_name ?? '—')
 
+  const tutorName = tutorUserProfile?.display_name ?? '—'
+  const schedDays = schedule?.days?.length
+    ? schedule.days.map((d) => DAY_NAMES[d]).join(', ')
+    : ''
+  const schedTime = schedule?.time ?? ''
+  const schedTz = schedule?.timezone ?? ''
+  const meetLink = match.meet_link ?? ''
+
+  // Pre-built template strings for WhatsApp buttons
+  const matchedMsg =
+    schedDays && schedTime && schedTz && meetLink
+      ? templates.matched({
+          tutorName,
+          days: schedDays,
+          time: schedTime,
+          tz: schedTz,
+          meetLink,
+        })
+      : null
+
+  const rem1hStudentMsg =
+    schedTime && schedTz && meetLink
+      ? templates.rem1h({
+          level: levelLabel,
+          subject: subjectName,
+          tutorName,
+          time: schedTime,
+          tz: schedTz,
+          meetLink,
+        })
+      : null
+
+  const tutorAvailCheckMsg = templates.tutorAvailCheck({
+    tutorName,
+    level: levelLabel,
+    subject: subjectName,
+    slot1: '[e.g. Mon 5:00 PM PKT]',
+    slot2: '[e.g. Wed 5:00 PM PKT]',
+  })
+
   const assignedDate = new Date(match.assigned_at).toLocaleDateString('en-GB', {
     day: 'numeric',
     month: 'long',
@@ -150,7 +193,10 @@ export default async function AdminMatchDetailPage({
             <dt className="text-zinc-500">Student</dt>
             <dd className="font-medium text-zinc-800 dark:text-zinc-200">{studentName}</dd>
             {studentProfile?.whatsapp_number && (
-              <dd className="text-xs text-zinc-400">📱 {studentProfile.whatsapp_number}</dd>
+              <dd className="mt-1 flex items-center gap-2 text-xs text-zinc-400">
+                📱 {studentProfile.whatsapp_number}
+                <WhatsAppLink number={studentProfile.whatsapp_number} label="Open chat" />
+              </dd>
             )}
           </div>
 
@@ -161,7 +207,10 @@ export default async function AdminMatchDetailPage({
             </dd>
             <dd className="text-xs text-zinc-400">{tutorProfile?.timezone}</dd>
             {tutorUserProfile?.whatsapp_number && (
-              <dd className="text-xs text-zinc-400">📱 {tutorUserProfile.whatsapp_number}</dd>
+              <dd className="mt-1 flex items-center gap-2 text-xs text-zinc-400">
+                📱 {tutorUserProfile.whatsapp_number}
+                <WhatsAppLink number={tutorUserProfile.whatsapp_number} label="Open chat" />
+              </dd>
             )}
           </div>
 
@@ -233,6 +282,60 @@ export default async function AdminMatchDetailPage({
         )}
       </div>
 
+      {/* WhatsApp Actions */}
+      <div className="space-y-3">
+        <h2 className="text-sm font-semibold uppercase tracking-wide text-zinc-500">
+          WhatsApp Messages
+        </h2>
+        <div className="rounded-xl border border-zinc-200 bg-white p-5 shadow-sm dark:border-zinc-700 dark:bg-zinc-900 space-y-3">
+          {matchedMsg ? (
+            <div>
+              <p className="mb-1 text-xs font-medium text-zinc-500">Match confirmed (to student)</p>
+              <CopyMessageButton
+                message={matchedMsg}
+                whatsappNumber={studentProfile?.whatsapp_number ?? undefined}
+                label="Copy matched message"
+              />
+            </div>
+          ) : (
+            <p className="text-xs text-zinc-400 italic">
+              Set schedule and Meet link to enable match confirmation template.
+            </p>
+          )}
+
+          {rem1hStudentMsg && (
+            <div>
+              <p className="mb-1 text-xs font-medium text-zinc-500">1-hour reminder (to student)</p>
+              <CopyMessageButton
+                message={rem1hStudentMsg}
+                whatsappNumber={studentProfile?.whatsapp_number ?? undefined}
+                label="Copy 1-hour reminder (student)"
+              />
+            </div>
+          )}
+
+          {rem1hStudentMsg && (
+            <div>
+              <p className="mb-1 text-xs font-medium text-zinc-500">1-hour reminder (to tutor)</p>
+              <CopyMessageButton
+                message={rem1hStudentMsg}
+                whatsappNumber={tutorUserProfile?.whatsapp_number ?? undefined}
+                label="Copy 1-hour reminder (tutor)"
+              />
+            </div>
+          )}
+
+          <div>
+            <p className="mb-1 text-xs font-medium text-zinc-500">Tutor availability check</p>
+            <CopyMessageButton
+              message={tutorAvailCheckMsg}
+              whatsappNumber={tutorUserProfile?.whatsapp_number ?? undefined}
+              label="Copy tutor availability check"
+            />
+          </div>
+        </div>
+      </div>
+
       {/* Audit info */}
       <p className="text-xs text-zinc-400">
         Match ID: {match.id} · Last updated:{' '}
diff --git a/app/admin/payments/page.tsx b/app/admin/payments/page.tsx
index ed9800d..218b1d5 100644
--- a/app/admin/payments/page.tsx
+++ b/app/admin/payments/page.tsx
@@ -1,5 +1,5 @@
-// E5 T5.3 S5.2: Admin payments list — view, mark paid, mark rejected
-// Closes #35 #32
+// E5 T5.3 S5.2 E11 T11.2 T11.3: Admin payments list — view, mark paid, mark rejected, WhatsApp actions
+// Closes #35 #32 #75 #76
 
 export const dynamic = 'force-dynamic'
 
@@ -7,6 +7,10 @@ import { createAdminClient } from '@/lib/supabase/admin'
 import { LEVEL_LABELS } from '@/lib/utils/request'
 import { MarkPaidForm, RejectForm } from './PaymentActions'
 import Link from 'next/link'
+import { CopyMessageButton } from '@/components/CopyMessageButton'
+import { WhatsAppLink } from '@/components/WhatsAppLink'
+import { templates } from '@/lib/whatsapp/templates'
+import { PAYMENT_INSTRUCTIONS } from '@/lib/config/pricing'
 
 const STATUS_COLOURS: Record<string, string> = {
   pending: 'bg-yellow-100 text-yellow-800',
@@ -170,6 +174,30 @@ export default async function AdminPaymentsPage({
                     <RejectForm paymentId={payment.id} />
                   </div>
                 )}
+
+                {/* WhatsApp message buttons — only when student and subject data are available */}
+                {profile?.display_name && subjectName !== '—' && (
+                  <div className="mt-4 flex flex-wrap items-center gap-3 border-t border-zinc-100 pt-3 dark:border-zinc-800">
+                    <WhatsAppLink number={profile?.whatsapp_number ?? null} label="Open chat" />
+                    <CopyMessageButton
+                      message={templates.paid({ subject: subjectName })}
+                      whatsappNumber={profile?.whatsapp_number ?? undefined}
+                      label="Copy payment confirmed"
+                    />
+                    <CopyMessageButton
+                      message={templates.paybank({
+                        accountTitle: PAYMENT_INSTRUCTIONS.accountTitle,
+                        bank: PAYMENT_INSTRUCTIONS.bankName,
+                        accountNumber: PAYMENT_INSTRUCTIONS.accountNumber,
+                        studentName: profile.display_name,
+                        level,
+                        subject: subjectName,
+                      })}
+                      whatsappNumber={profile?.whatsapp_number ?? undefined}
+                      label="Copy payment instructions"
+                    />
+                  </div>
+                )}
               </div>
             )
           })}
diff --git a/app/admin/requests/[id]/page.tsx b/app/admin/requests/[id]/page.tsx
index f55bba9..3eca557 100644
--- a/app/admin/requests/[id]/page.tsx
+++ b/app/admin/requests/[id]/page.tsx
@@ -1,5 +1,5 @@
-// E7 T7.2: Admin request detail + matching screen
-// Closes #48
+// E7 T7.2 E11 T11.3: Admin request detail + matching screen + WhatsApp link
+// Closes #48 #76
 
 export const dynamic = 'force-dynamic'
 
@@ -9,6 +9,7 @@ import { createAdminClient } from '@/lib/supabase/admin'
 import { fetchApprovedTutors } from '@/lib/services/matching'
 import { STATUS_COLOURS, STATUS_LABELS, LEVEL_LABELS } from '@/lib/utils/request'
 import { AssignTutorForm } from './AssignTutorForm'
+import { WhatsAppLink } from '@/components/WhatsAppLink'
 
 const EXAM_BOARD_LABELS: Record<string, string> = {
   cambridge: 'Cambridge',
@@ -160,7 +161,10 @@ export default async function AdminRequestDetailPage({
                 )}
               </p>
               {profile?.whatsapp_number && (
-                <p className="text-sm text-zinc-500">📱 {profile.whatsapp_number}</p>
+                <p className="flex items-center gap-2 text-sm text-zinc-500">
+                  📱 {profile.whatsapp_number}
+                  <WhatsAppLink number={profile.whatsapp_number} label="Open chat" />
+                </p>
               )}
             </section>
 
diff --git a/app/admin/sessions/page.tsx b/app/admin/sessions/page.tsx
index bbb19a3..2c2ecf2 100644
--- a/app/admin/sessions/page.tsx
+++ b/app/admin/sessions/page.tsx
@@ -1,5 +1,5 @@
-// E8 T8.4 S8.2: Admin sessions overview — list all sessions, update status, reschedule
-// Closes #57 #53
+// E8 T8.4 S8.2 E11 T11.2: Admin sessions overview — list all sessions, update status, reschedule, WhatsApp actions
+// Closes #57 #53 #75
 
 export const dynamic = 'force-dynamic'
 
@@ -7,6 +7,8 @@ import { createAdminClient } from '@/lib/supabase/admin'
 import { SESSION_STATUS_LABELS, SESSION_STATUS_COLOURS, formatSessionTime, type SessionStatus } from '@/lib/utils/session'
 import { SessionStatusForm, RescheduleForm } from './SessionActions'
 import Link from 'next/link'
+import { CopyMessageButton } from '@/components/CopyMessageButton'
+import { templates } from '@/lib/whatsapp/templates'
 
 const ADMIN_TIMEZONE = 'Asia/Karachi'
 
@@ -21,15 +23,15 @@ type SessionRow = {
     meet_link: string | null
     request_id: string
     tutor_user_id: string
-    schedule_pattern: { duration_mins?: number } | null
+    schedule_pattern: { duration_mins?: number; timezone?: string } | null
     tutor_profiles: {
-      user_profiles: { display_name: string } | null
+      user_profiles: { display_name: string; whatsapp_number: string | null } | null
     } | null
     requests: {
       id: string
       level: string
       subjects: { name: string } | null
-      user_profiles: { display_name: string } | null
+      user_profiles: { display_name: string; whatsapp_number: string | null } | null
     } | null
   } | null
 }
@@ -44,12 +46,12 @@ export default async function AdminSessionsPage() {
        matches!sessions_match_id_fkey (
          meet_link, request_id, tutor_user_id, schedule_pattern,
          tutor_profiles!matches_tutor_user_id_fkey (
-           user_profiles!tutor_user_id ( display_name )
+           user_profiles!tutor_user_id ( display_name, whatsapp_number )
          ),
          requests!matches_request_id_fkey (
            id, level,
            subjects ( name ),
-           user_profiles!requests_created_by_user_id_fkey ( display_name )
+           user_profiles!requests_created_by_user_id_fkey ( display_name, whatsapp_number )
          )
        )`
     )
@@ -140,12 +142,42 @@ function SessionCard({
   const tutorProfile = match?.tutor_profiles
   const studentName =
     (req?.user_profiles as { display_name: string } | null)?.display_name ?? '—'
+  const studentWhatsApp =
+    (req?.user_profiles as { display_name: string; whatsapp_number: string | null } | null)
+      ?.whatsapp_number ?? null
   const tutorName =
     (tutorProfile?.user_profiles as { display_name: string } | null)?.display_name ?? '—'
+  const tutorWhatsApp =
+    (tutorProfile?.user_profiles as { display_name: string; whatsapp_number: string | null } | null)
+      ?.whatsapp_number ?? null
   const subjectName = (req?.subjects as { name: string } | null)?.name ?? '—'
+  const levelLabel = req?.level ?? ''
   const timeDisplay = formatSessionTime(session.scheduled_start_utc, adminTimezone)
+  const scheduleTz = match?.schedule_pattern?.timezone ?? adminTimezone
+  // Format session time in the schedule/student timezone for WhatsApp messages
+  const waTimeDisplay = formatSessionTime(session.scheduled_start_utc, scheduleTz)
   const requestId = match?.request_id ?? ''
   const durationMins = match?.schedule_pattern?.duration_mins ?? 60
+  const meetLink = match?.meet_link ?? ''
+
+  // Template strings for WhatsApp buttons (use waTimeDisplay so tz label matches the time)
+  const rem1hMsg = meetLink
+    ? templates.rem1h({
+        level: levelLabel,
+        subject: subjectName,
+        tutorName,
+        time: waTimeDisplay,
+        tz: scheduleTz,
+        meetLink,
+      })
+    : null
+
+  const lateJoinMsg = meetLink
+    ? templates.lateJoin({ name: studentName, time: waTimeDisplay, meetLink })
+    : null
+
+  const studentNoShowMsg = templates.studentNoShow({ name: studentName, time: waTimeDisplay })
+  const tutorNoShowMsg = templates.tutorNoShow({ name: studentName })
 
   return (
     <div className="rounded-xl border border-zinc-200 bg-white p-4 shadow-sm dark:border-zinc-700 dark:bg-zinc-900">
@@ -192,6 +224,41 @@ function SessionCard({
           />
         </div>
       )}
+
+      {/* WhatsApp message buttons */}
+      <div className="mt-3 flex flex-wrap gap-2 border-t border-zinc-100 pt-3 dark:border-zinc-800">
+        {rem1hMsg && (
+          <CopyMessageButton
+            message={rem1hMsg}
+            whatsappNumber={studentWhatsApp ?? undefined}
+            label="Copy 1-hour reminder"
+          />
+        )}
+        {lateJoinMsg && (
+          <CopyMessageButton
+            message={lateJoinMsg}
+            whatsappNumber={studentWhatsApp ?? undefined}
+            label="Copy late join follow-up"
+          />
+        )}
+        <CopyMessageButton
+          message={studentNoShowMsg}
+          whatsappNumber={studentWhatsApp ?? undefined}
+          label="Copy student no-show notice"
+        />
+        <CopyMessageButton
+          message={tutorNoShowMsg}
+          whatsappNumber={studentWhatsApp ?? undefined}
+          label="Copy tutor no-show apology"
+        />
+        {tutorWhatsApp && rem1hMsg && (
+          <CopyMessageButton
+            message={rem1hMsg}
+            whatsappNumber={tutorWhatsApp}
+            label="Copy 1-hour reminder (tutor)"
+          />
+        )}
+      </div>
     </div>
   )
 }
diff --git a/app/admin/tutors/[id]/page.tsx b/app/admin/tutors/[id]/page.tsx
index 259a601..a031bf2 100644
--- a/app/admin/tutors/[id]/page.tsx
+++ b/app/admin/tutors/[id]/page.tsx
@@ -1,5 +1,5 @@
-// E6 T6.3 T6.4 S6.2: Admin tutor detail page — full profile view with approve/revoke
-// Closes #42 #43 #39
+// E6 T6.3 T6.4 S6.2 E11 T11.3: Admin tutor detail page — full profile view with approve/revoke + WhatsApp link
+// Closes #42 #43 #39 #76
 
 export const dynamic = 'force-dynamic'
 
@@ -7,6 +7,7 @@ import { notFound } from 'next/navigation'
 import Link from 'next/link'
 import { createAdminClient } from '@/lib/supabase/admin'
 import { ApproveButton, RevokeButton } from '../TutorActions'
+import { WhatsAppLink } from '@/components/WhatsAppLink'
 
 const DAY_NAMES = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']
 
@@ -118,7 +119,12 @@ export default async function AdminTutorDetailPage({
           </h2>
           <p className="text-sm text-zinc-700 dark:text-zinc-300">
             <span className="font-medium">WhatsApp:</span>{' '}
-            {profile?.whatsapp_number ?? (
+            {profile?.whatsapp_number ? (
+              <span className="inline-flex items-center gap-2">
+                {profile.whatsapp_number}
+                <WhatsAppLink number={profile.whatsapp_number} label="Open chat" />
+              </span>
+            ) : (
               <span className="italic text-zinc-400">not provided</span>
             )}
           </p>
diff --git a/app/admin/users/page.tsx b/app/admin/users/page.tsx
index e2c353a..76bcd11 100644
--- a/app/admin/users/page.tsx
+++ b/app/admin/users/page.tsx
@@ -1,8 +1,9 @@
-// E3 T3.4: admin user role management screen
-// Closes #19 #23
+// E3 T3.4 E11 T11.3: admin user role management screen + WhatsApp links
+// Closes #19 #23 #76
 
 import { createAdminClient } from '@/lib/supabase/admin'
 import { assignRole, removeRole, setPrimaryRole } from '../actions'
+import { WhatsAppLink } from '@/components/WhatsAppLink'
 
 const ALL_ROLES = ['student', 'parent', 'tutor', 'admin'] as const
 type Role = (typeof ALL_ROLES)[number]
@@ -128,7 +129,16 @@ export default async function AdminUsersPage() {
                   </td>
 
                   <td className="px-4 py-3 text-zinc-500 dark:text-zinc-400">
-                    {user.whatsapp_number ?? '—'}
+                    <div className="flex flex-wrap items-center gap-2">
+                      {user.whatsapp_number ? (
+                        <>
+                          <span>{user.whatsapp_number}</span>
+                          <WhatsAppLink number={user.whatsapp_number} label="Open chat" />
+                        </>
+                      ) : (
+                        '—'
+                      )}
+                    </div>
                   </td>
 
                   <td className="px-4 py-3 text-zinc-500 dark:text-zinc-400">
diff --git a/components/CopyMessageButton.tsx b/components/CopyMessageButton.tsx
new file mode 100644
index 0000000..d85344e
--- /dev/null
+++ b/components/CopyMessageButton.tsx
@@ -0,0 +1,71 @@
+'use client'
+
+// T11.2 / S11.2: "Copy message" and optional "Open WhatsApp" button component
+// Closes #75 #73
+
+import { useState } from 'react'
+import { buildWaLink } from '@/lib/whatsapp/buildLink'
+
+interface CopyMessageButtonProps {
+  message: string
+  whatsappNumber?: string
+  label?: string
+}
+
+export function CopyMessageButton({ message, whatsappNumber, label }: CopyMessageButtonProps) {
+  const [copied, setCopied] = useState(false)
+
+  async function handleCopy() {
+    try {
+      if (navigator && 'clipboard' in navigator && navigator.clipboard?.writeText) {
+        await navigator.clipboard.writeText(message)
+      } else {
+        // Fallback for older browsers or when Clipboard API is unavailable
+        const textarea = document.createElement('textarea')
+        textarea.value = message
+        textarea.style.position = 'fixed'
+        textarea.style.opacity = '0'
+        document.body.appendChild(textarea)
+        textarea.focus()
+        textarea.select()
+        try {
+          document.execCommand('copy')
+        } finally {
+          document.body.removeChild(textarea)
+        }
+      }
+      setCopied(true)
+      setTimeout(() => setCopied(false), 2000)
+    } catch (error) {
+      console.error('Failed to copy message to clipboard:', error)
+      setCopied(false)
+    }
+  }
+
+  const waHref = whatsappNumber ? buildWaLink(whatsappNumber, message) : null
+
+  return (
+    <div className="flex flex-wrap items-center gap-2">
+      <button
+        type="button"
+        onClick={handleCopy}
+        aria-label={label ? `Copy: ${label}` : 'Copy message'}
+        className="inline-flex items-center gap-1.5 rounded-lg border border-zinc-300 bg-white px-3 py-1.5 text-xs font-medium text-zinc-700 shadow-sm transition hover:bg-zinc-50 dark:border-zinc-600 dark:bg-zinc-800 dark:text-zinc-300 dark:hover:bg-zinc-700"
+      >
+        {copied ? '✅ Copied!' : `📋 ${label ?? 'Copy message'}`}
+      </button>
+
+      {waHref && (
+        <a
+          href={waHref}
+          target="_blank"
+          rel="noopener noreferrer"
+          aria-label={`Open WhatsApp${label ? `: ${label}` : ''}`}
+          className="inline-flex items-center gap-1.5 rounded-lg bg-[#25D366] px-3 py-1.5 text-xs font-medium text-white shadow-sm transition hover:bg-[#1ebe57]"
+        >
+          💬 Open WhatsApp
+        </a>
+      )}
+    </div>
+  )
+}
diff --git a/components/WhatsAppLink.tsx b/components/WhatsAppLink.tsx
new file mode 100644
index 0000000..f1c0e33
--- /dev/null
+++ b/components/WhatsAppLink.tsx
@@ -0,0 +1,30 @@
+// T11.3: Standalone "Open WhatsApp" link component
+// Closes #76
+
+import { buildWaLink } from '@/lib/whatsapp/buildLink'
+
+interface WhatsAppLinkProps {
+  number: string | null | undefined
+  message?: string
+  label?: string
+}
+
+export function WhatsAppLink({ number, message, label = 'Open WhatsApp' }: WhatsAppLinkProps) {
+  if (!number) {
+    return <span className="text-xs italic text-zinc-400">No WhatsApp number</span>
+  }
+
+  const href = buildWaLink(number, message)
+
+  return (
+    <a
+      href={href}
+      target="_blank"
+      rel="noopener noreferrer"
+      aria-label={label}
+      className="inline-flex items-center gap-1.5 rounded-lg bg-[#25D366] px-3 py-1.5 text-xs font-medium text-white shadow-sm transition hover:bg-[#1ebe57]"
+    >
+      💬 {label}
+    </a>
+  )
+}
diff --git a/lib/whatsapp/buildLink.ts b/lib/whatsapp/buildLink.ts
new file mode 100644
index 0000000..19cc255
--- /dev/null
+++ b/lib/whatsapp/buildLink.ts
@@ -0,0 +1,16 @@
+// T11.3: wa.me deep link builder utility
+// Closes #76
+
+/**
+ * Builds a wa.me WhatsApp deep link for the given number and optional pre-filled message.
+ * Strips all non-digit characters from the number.
+ * Returns an empty string if no digits remain (caller should treat this as "no link").
+ * If message is provided, appends it as a URL-encoded ?text= parameter.
+ */
+export function buildWaLink(whatsappNumber: string, message?: string): string {
+  const digits = whatsappNumber.replace(/\D/g, '')
+  if (!digits) return ''
+  const base = `https://wa.me/${digits}`
+  if (!message) return base
+  return `${base}?text=${encodeURIComponent(message)}`
+}
diff --git a/lib/whatsapp/templates.ts b/lib/whatsapp/templates.ts
new file mode 100644
index 0000000..70344cf
--- /dev/null
+++ b/lib/whatsapp/templates.ts
@@ -0,0 +1,129 @@
+// T11.1: All 14 standard WhatsApp message templates from docs/OPS.md section 6
+// Closes #74
+
+export const templates = {
+  // 6.1 Greeting (auto-greeting in WhatsApp Business)
+  greeting: () =>
+    `Hello! Welcome to CorvEd 👋\n` +
+    `We provide 1:1 online tutoring for O Levels and A Levels with verified teachers.\n` +
+    `To get started, please share:\n` +
+    `1) Student or Parent?\n2) Level (O / A)\n3) Subject\n` +
+    `4) City + Timezone\n5) Availability (days + times)\n6) Your goal (exam date or weak areas)`,
+
+  // 6.2 Lead intake
+  intake: () =>
+    `To match you with the right teacher, please reply with:\n` +
+    `1) Student or Parent?\n` +
+    `2) Level: O Levels or A Levels\n` +
+    `3) Subject: Math/Physics/Chemistry/Biology/English/CS/Pak Studies/Islamiyat/Urdu\n` +
+    `4) Exam board (Cambridge/Edexcel/Other) (optional)\n` +
+    `5) Your availability (days + time windows) + your timezone\n` +
+    `6) Goal (target grade, weak topics, exam date)`,
+
+  // 6.3 Package options
+  packages: () =>
+    `We offer monthly packages per subject (60-minute sessions):\n` +
+    `- 8 sessions/month (~2x per week)\n` +
+    `- 12 sessions/month (~3x per week)\n` +
+    `- 20 sessions/month (~5x per week)\n\n` +
+    `Share your preferred package and we'll send payment details.`,
+
+  // 6.4 Payment instructions
+  paybank: (p: {
+    accountTitle: string
+    bank: string
+    accountNumber: string
+    studentName: string
+    level: string
+    subject: string
+  }) =>
+    `Bank transfer details:\n` +
+    `Account Title: ${p.accountTitle}\n` +
+    `Bank: ${p.bank}\n` +
+    `Account/IBAN: ${p.accountNumber}\n\n` +
+    `Reference: CorvEd | ${p.studentName} | ${p.level} ${p.subject}\n\n` +
+    `After payment, send a screenshot or transaction reference and we'll confirm.`,
+
+  // 6.5 Payment confirmed
+  paid: (p: { subject: string }) =>
+    `Payment received ✅ Thank you.\n` +
+    `Next step: we'll match you with a verified ${p.subject} teacher and confirm your schedule shortly.\n\n` +
+    `To finalize scheduling, please confirm:\n- preferred days/times (with timezone)\n- start date (if any preference)`,
+
+  // 6.6 Tutor availability check
+  tutorAvailCheck: (p: {
+    tutorName: string
+    level: string
+    subject: string
+    slot1: string
+    slot2: string
+  }) =>
+    `Hi ${p.tutorName}, I hope you're well.\n` +
+    `We have a new ${p.level} ${p.subject} student. Are you available for:\n` +
+    `Option 1: ${p.slot1}\nOption 2: ${p.slot2}\n\n` +
+    `If yes, please confirm which option works. If not, share 2–3 available slots.`,
+
+  // 6.7 Match confirmed to student
+  matched: (p: {
+    tutorName: string
+    days: string
+    time: string
+    tz: string
+    meetLink: string
+  }) =>
+    `You're matched ✅\n` +
+    `Teacher: ${p.tutorName}\n` +
+    `Schedule: ${p.days} at ${p.time} (${p.tz})\n` +
+    `Session duration: 60 minutes\n` +
+    `Google Meet link (recurring): ${p.meetLink}\n\n` +
+    `Reschedule policy: please request reschedules at least 24 hours before the class time.`,
+
+  // 6.8 1-hour reminder
+  rem1h: (p: {
+    level: string
+    subject: string
+    tutorName: string
+    time: string
+    tz: string
+    meetLink: string
+  }) =>
+    `Reminder ⏰ Your class starts in 1 hour:\n` +
+    `${p.level} ${p.subject} with ${p.tutorName}\n` +
+    `Time: ${p.time} (${p.tz})\n` +
+    `Meet link: ${p.meetLink}`,
+
+  // 6.9 Reschedule request acknowledgement
+  reschedAck: () =>
+    `Got it — I can help you reschedule.\n` +
+    `Please share 2–3 alternate time slots (days + times + your timezone).\n` +
+    `Note: reschedules are allowed if requested at least 24 hours before class.`,
+
+  // 6.10 Reschedule confirmed
+  reschedConfirmed: (p: { day: string; time: string; tz: string; meetLink: string }) =>
+    `Reschedule confirmed ✅\n` +
+    `New time: ${p.day} at ${p.time} (${p.tz})\n` +
+    `Meet link (same): ${p.meetLink}`,
+
+  // 6.11 Late join follow-up
+  lateJoin: (p: { name: string; time: string; meetLink: string }) =>
+    `Hi ${p.name}, your class started at ${p.time}. Are you joining?\nMeet link: ${p.meetLink}`,
+
+  // 6.12 Student no-show policy notice
+  studentNoShow: (p: { name: string; time: string }) =>
+    `Hi ${p.name}, we waited 10 minutes and couldn't connect today.\n` +
+    `As per our policy, a no-show counts as a used session.\n` +
+    `If you'd like, share your availability and we'll continue with the remaining sessions.`,
+
+  // 6.13 Tutor no-show apology
+  tutorNoShow: (p: { name: string }) =>
+    `Hi ${p.name}, we're sorry — the teacher could not join today.\n` +
+    `This session will not be deducted.\n` +
+    `Please share 2–3 alternate slots and we'll reschedule immediately.`,
+
+  // 6.14 Renewal reminder
+  renewalReminder: (p: { subject: string }) =>
+    `Your monthly package is ending soon.\n` +
+    `Would you like to renew for next month for ${p.subject}?\n\n` +
+    `Packages:\n- 8 sessions\n- 12 sessions\n- 20 sessions\n\n` +
+    `Reply with your package choice and we'll share payment details.`,
+}
diff --git a/package-lock.json b/package-lock.json
index 88727f3..8d26359 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -76,7 +76,6 @@
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@@ -2672,7 +2667,6 @@
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