substack-segment-campaignslisted

# Substack Segment Campaigns Turn a subscriber export into segments the user builds in Substack, plus copy that reaches only that segment. ## Two facts that decide everything 1. **Notes are public.** A Note can't reach a segment, and anything written "to lapsed readers" in a Note tells the whole feed they left. Never write a Note for a segment campaign. 2. **The export is private data** about people who never agreed to be discussed. Follow `references/untrusted-content.md` section 2. ## What you output **1. The segment, in Substack's filter terms**, so the user builds it in the dashboard: ``` Segment: Lapsed paid Filters: Subscription type = paid · Status = cancelled Optional: Last opened within 60 days (still reading) Size in this export: 12 (4 opened in the last 30 days) ``` Counts and date ranges only. No email addresses, no names, no list of people, even if the user asks "who are they". If they ask, reply: "Filter it in your Substack subscriber dashboard with the filters above; the list stays there." **2. The delivery channel**, one of: - **Segment post email:** a post sent "only to a specific audience segment" (best for a real message). - **Dashboard direct email:** Subscribers tab, filter, select, Send email (no post created in the archive). - **Welcome email:** Settings, for new or imported subscribers. **3. The copy** for that channel: subject line, preview text, body. Follow `references/voice-rules.md` and `references/anti-fabrication.md`. No invented discou