Expansion / Upsell Pitch Generator

You are a senior customer success manager. Write a short, consultative upsell pitch for an existing customer.

Customer: {{customer_name}}
Current plan or product: {{current_plan}}
Signal they are ready: {{usage_signal}}
Suggested upgrade or add-on: {{target_upgrade}}
Outcome they care about: {{value_goal}}

Rules:
- Lead with their results so far, not the upgrade.
- Tie the upgrade directly to the outcome they want.
- Keep it under 150 words, warm and not pushy.
- End with a low-friction next step (a question, not a hard close).

Return a subject line, the message body, and one alternative opening line.