diff --git a/app/api/settings/route.ts b/app/api/settings/route.ts
index 08f1aaa..2f6e6d0 100644
--- a/app/api/settings/route.ts
+++ b/app/api/settings/route.ts
@@ -3,12 +3,7 @@ export const dynamic = 'force-dynamic'
 import { NextRequest, NextResponse } from 'next/server'
 import { createClient } from '@/lib/supabase/server'
 
-const ALLOWED_KEYS = [
-  'ANTHROPIC_API_KEY',
-  'VOYAGE_API_KEY',
-  'META_WHATSAPP_PHONE_NUMBER_ID',
-  'META_WHATSAPP_ACCESS_TOKEN',
-] as const
+const ALLOWED_KEYS = ['ANTHROPIC_API_KEY', 'VOYAGE_API_KEY'] as const
 type SettingKey = typeof ALLOWED_KEYS[number]
 
 async function requireAdmin(supabase: Awaited<ReturnType<typeof createClient>>) {
diff --git a/lib/notifications/whatsapp.ts b/lib/notifications/whatsapp.ts
deleted file mode 100644
index fb6a6bb..0000000
--- a/lib/notifications/whatsapp.ts
+++ /dev/null
@@ -1,42 +0,0 @@
-export async function sendWhatsAppMessage(
-  phoneNumber: string,
-  templateName: string,
-  parameters: string[],
-  phoneNumberId: string,
-  accessToken: string,
-): Promise<void> {
-  const sanitized = phoneNumber.replace(/[^0-9]/g, '')
-  if (!sanitized) return
-
-  const body = {
-    messaging_product: 'whatsapp',
-    to: sanitized,
-    type: 'template',
-    template: {
-      name: templateName,
-      language: { code: 'en_US' },
-      components: [
-        {
-          type: 'body',
-          parameters: parameters.map(text => ({ type: 'text', text })),
-        },
-      ],
-    },
-  }
-
-  const res = await fetch(
-    `https://graph.facebook.com/v19.0/${phoneNumberId}/messages`,
-    {
-      method: 'POST',
-      headers: {
-        'Content-Type': 'application/json',
-        'Authorization': `Bearer ${accessToken}`,
-      },
-      body: JSON.stringify(body),
-    }
-  )
-
-  if (!res.ok) {
-    throw new Error(`WhatsApp API error: ${res.status}`)
-  }
-}
diff --git a/supabase/migrations/20260711000015_phase4.sql b/supabase/migrations/20260711000015_phase4.sql
deleted file mode 100644
index 48760ac..0000000
--- a/supabase/migrations/20260711000015_phase4.sql
+++ /dev/null
@@ -1,10 +0,0 @@
--- Add effectiveness recheck round tracking to capa_actions
-ALTER TABLE capa_actions
-  ADD COLUMN IF NOT EXISTS effectiveness_recheck_round INT NOT NULL DEFAULT 0;
-
--- WhatsApp and effectiveness recheck credentials for Settings UI
-INSERT INTO app_settings (key, value, updated_at, updated_by)
-VALUES
-  ('META_WHATSAPP_PHONE_NUMBER_ID', '', now(), NULL),
-  ('META_WHATSAPP_ACCESS_TOKEN',    '', now(), NULL)
-ON CONFLICT (key) DO NOTHING;
diff --git a/tests/lib/notifications/whatsapp.test.ts b/tests/lib/notifications/whatsapp.test.ts
deleted file mode 100644
index 58977e4..0000000
--- a/tests/lib/notifications/whatsapp.test.ts
+++ /dev/null
@@ -1,58 +0,0 @@
-import { describe, it, expect, vi, beforeEach } from 'vitest'
-import { sendWhatsAppMessage } from '@/lib/notifications/whatsapp'
-
-const fetchMock = vi.fn()
-vi.stubGlobal('fetch', fetchMock)
-
-describe('sendWhatsAppMessage', () => {
-  beforeEach(() => fetchMock.mockClear())
-
-  it('posts to Meta Graph API with correct template structure', async () => {
-    fetchMock.mockResolvedValueOnce(
-      new Response('{"messages":[{"id":"wamid.abc"}]}', { status: 200 })
-    )
-    await sendWhatsAppMessage(
-      '60123456789',
-      'ims_incident_alert',
-      ['SETIA-202407-0001', 'injury', 'Warehouse A'],
-      'test-phone-id',
-      'test-token'
-    )
-    expect(fetchMock).toHaveBeenCalledOnce()
-    const [url, opts] = fetchMock.mock.calls[0]
-    expect(url).toBe('https://graph.facebook.com/v19.0/test-phone-id/messages')
-    expect(opts.method).toBe('POST')
-    expect(opts.headers['Authorization']).toBe('Bearer test-token')
-    const body = JSON.parse(opts.body)
-    expect(body.messaging_product).toBe('whatsapp')
-    expect(body.to).toBe('60123456789')
-    expect(body.type).toBe('template')
-    expect(body.template.name).toBe('ims_incident_alert')
-    expect(body.template.language.code).toBe('en_US')
-    expect(body.template.components[0].parameters).toHaveLength(3)
-    expect(body.template.components[0].parameters[0]).toEqual({ type: 'text', text: 'SETIA-202407-0001' })
-  })
-
-  it('throws on non-2xx response', async () => {
-    fetchMock.mockResolvedValueOnce(
-      new Response('{"error":{"message":"Invalid token"}}', { status: 400 })
-    )
-    await expect(
-      sendWhatsAppMessage('60123456789', 'ims_incident_alert', ['a'], 'pid', 'tok')
-    ).rejects.toThrow('WhatsApp API error: 400')
-  })
-
-  it('returns immediately without calling fetch when phoneNumber is empty', async () => {
-    await sendWhatsAppMessage('', 'ims_incident_alert', ['a'], 'pid', 'tok')
-    expect(fetchMock).not.toHaveBeenCalled()
-  })
-
-  it('sanitizes phone number — strips spaces, dashes, and plus sign', async () => {
-    fetchMock.mockResolvedValueOnce(
-      new Response('{"messages":[{"id":"x"}]}', { status: 200 })
-    )
-    await sendWhatsAppMessage('+60 12-345 6789', 'ims_incident_alert', ['a'], 'pid', 'tok')
-    const body = JSON.parse(fetchMock.mock.calls[0][1].body)
-    expect(body.to).toBe('60123456789')
-  })
-})