By Ronny Cruz , founder of Open Feed Network (Candor Network). Solo founder, one production platform, and — as of this week — one very small Fediverse instance. The line in my own README Sentinel Signup is a registration-screening service for Fediverse instances. It reads your pending signup queue, scores each applicant, and approves or rejects through the admin API. I launched it during the July spam wave, when instance admins were drowning in fake approval requests. Here's the setup i...