Who hurts
Agencies, studios and freelancers with 30–90 day payment terms.
The problem
Chasing money is awkward, so it gets postponed. A polite nudge on day 3 collects far more than an angry email on day 45, and nobody sends the day-3 nudge.
What you build
Watch the invoicing tool, escalate tone on a schedule from friendly reminder through firm to formal notice, pause automatically the moment the client replies, and hand the thread to a human.
Why now
Invoicing platforms all have webhooks, and tone-graded drafting is the easy end of what models do well.
Validate it this week
Run the sequence manually for five freelancers for a month. Measure days-to-payment before and after. That delta is the pitch.
Why you'd keep winning
Very little. Compete on the escalation ladder being genuinely well-written and on knowing when to stop.
The honest risk
One tone-deaf message costs a client relationship worth more than the invoice. Keep the human handoff aggressive.
The prompt is written to make an AI argue with you before it writes code. That first round of pushback is worth more than the scaffold.