Write a 5-email welcome/onboarding sequence for new Platform Mastery AI Agent customers:

Email 1: Welcome + first query prompt (get them using it immediately)
Email 2: Power tips — 5 things the agent can do they probably don't know about
Email 3: Integration guide — connecting the agent to their workflow
Email 4: Success story / case study template
Email 5: Upgrade prompt — show advanced features in higher tier

For each email: subject line, preview text, full body (300 words max), CTA.
Tone: Helpful, professional, Australian.