WhatsApp Watcher Skill

Monitors WhatsApp Web and creates task files for important messages.

Quick Start

# Start watcher (visible browser)
python src/watchers/whatsapp_watcher.py

# Or via MCP server (for sending)
python src/mcp_servers/whatsapp_server.py

Architecture

MCP Server (whatsapp_server.py)
        │
        ▼ Creates queue file
Vault/WhatsApp_Queue/SEND_to_*.md
        │
        ▼ Watcher picks up
Watcher (whatsapp_watcher.py)
        │
        ▼ Browser automation
WhatsApp Web → Message sent

Why queues? MCP doesn't drive browser directly to prevent session locking.

First Run

1. Browser opens automatically
2. Scan QR code with WhatsApp mobile (120 second timeout)
3. Session persists in config/whatsapp_data/
4. On auth failure: Creates alert in Vault/Needs_Action/

Production Gotchas ⚠️

Contact Name Must Match Exactly

The to parameter must match the contact name in your phone EXACTLY (case-sensitive):

# ✗ FAILS - Different case
send_whatsapp_message(to="john doe", message="Hello")

# ✓ WORKS - Exact match
send_whatsapp_message(to="John Doe", message="Hello")

Priority Classification System

Messages are auto-classified by keywords:

Known Contacts Get Priority Boost

Known contacts (from config/known_senders.json) get automatic priority upgrade:

• Medium → High for known contacts
• Unknown + High = ESCALATION (special handling)

WhatsApp Web Selector Changes

WhatsApp updates their DOM frequently. Multiple fallback selectors are used:

# Primary input selector
input_selector = 'div[contenteditable="true"][data-tab="10"]'

# Fallback
input_selector = 'div[data-testid="conversation-compose-box-input"]'

QR Code Timeout

Only 120 seconds to scan QR code. After that:

• Auth fails
• Debug screenshot saved to Vault/Logs/
• Alert task created in Vault/Needs_Action/

PII Redaction in Logs

Phone numbers are automatically redacted in audit logs:

+1 234 567 8900 → [REDACTED]

Auto-Reply Feature

Enable automatic responses based on priority:

WHATSAPP_AUTO_REPLY=true
WHATSAPP_AUTO_REPLY_THRESHOLD=high  # Options: urgent, high, medium, low

Only messages at or above threshold get auto-reply.

MCP Tools

Via whatsapp_server.py:

1. send_whatsapp_message(to, message, requires_approval) - Queue message for sending

Configuration

Sending Messages

With Approval (Default)

send_whatsapp_message(
    to="John Doe",
    message="Your invoice is ready",
    requires_approval=True  # Creates file in Pending_Approval/
)

Move file to Vault/WhatsApp_Queue/ renamed as SEND_to_*.md to send.

Direct Send (Trusted)

send_whatsapp_message(
    to="John Doe",
    message="Quick update",
    requires_approval=False  # Goes directly to queue
)

Verification

Run: python scripts/verify.py

Related Skills

• sending-emails - Email sending patterns
• digital-fte-orchestrator - Task processing loop