This is a well-scoped build and right in my lane — Gmail-based AI email classification into your 5 categories, label-driven forwarding, keyword → Slack escalation, a Google Sheets status state-machine with reference numbers + full timestamp tracking (Pending → Confirmed), a daily dashboard + Slack digest, and first-contact auto-reply with loop protection.
The AI-classification + Sheets-state-machine core is something I’ve already built a version of (Claude scoring + routing into Sheets): I built an n8n + Claude lead-gen workflow (scrape -> AI-score -> auto-email) - sharing it . The two parts people get subtly wrong are the loop-protection (I handle it with a dedup/seen-key in the Sheet so first-contact only fires once) and the status tracking (an idempotent reference-number generator so a re-processed email never double-counts).
I don’t speak German, but you said English is fine on your side and the requirements doc is already done — so this is a pure build for me. Want me to do the first workflow (the email labeler) as a paid milestone so you can see how I work before committing to all six?