The WhatsApp AI Sales Closer - Prompt Architecture (Router + 8 Vertical Templates, PDF, English)

Not just a prompt list -- the actual prompt architecture behind a real production AI sales bot: an intent router, a mandatory-close pattern, and 8 fully genericized vertical system prompts. Every real business name, phone number, price and coupon code has been stripped and replaced with [BRACKETS] -- plug in your own data and ship.

• The Intent Router: keyword/regex pattern that decides which service prompt to load, zero LLM cost, adapt in minutes.

• 8 vertical system prompts: retail/physical goods, professional services, regulated/health triage (with hard liability guardrails), field services quoting, equipment rental (no-price-disclosure pattern), custom/made-to-order goods, IT support scheduling, creative agency intake.

• The Mandatory-Close Pattern: the single structural rule that turns a Q&A bot into a sales channel.

• Bonus: the self-referential SaaS upsell pattern (for when your bot also sells the software that runs it).

• Implementation notes: temperature settings, token budget, and the 'reasoning model returns empty content' production bug and fix -- a real war story, not theory.

• Works with any LLM (OpenAI, Claude, Gemini, LiteLLM/OpenRouter) and any WhatsApp/chat channel (Meta Cloud API, Twilio, 360dialog, Evolution API, n8n, Make, Voiceflow).

• 10-page PDF, instant download, pay once, yours forever.Independent educational product -- not affiliated with or endorsed by Anthropic, OpenAI, Meta, or any WhatsApp Business Solution Provider. Distilled and fully genericized from a real production system; no real business data is included.