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.