Dev's Claude Code sales plugin sent 1,097 emails in 85 days: 0 paid
No_Job_9995 · reddit · 2026-09-03
An indie dev built LeadAce, a sales agent running as a Claude Code plugin, and pointed it at his own product for 85 days as a ground-truth test of going zero-to-one.
Architecture: Cloudflare Workers + Supabase behind an MCP server. A nightly /daily-cycle skill runs four phases (check replies → evaluate → send → build list), each as a subagent returning three lines to the main context so a 50-email cycle completes. Deterministic checks live server-side: placeholders or links in the body get a 422 and the agent rewrites. Each run ends with an uneditable journal entry, anonymized by a second model before publishing.
Results: 1,097 emails, 11 human replies (1 positive), 9 signups, 0 paid. Reply rate was no better than ordinary cold email; most replies say stop.
Lessons: A single loop can't change its own strategy — it kept executing the same plan despite bad results, and even with an added periodic meta review it still needs the human. Next time he'd design the MCP tool boundaries first.
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