tl;dr: Celld is an open-source daemon from Deno that runs Cloudflare Workers and Durable Objects on your own machines, with each object as its own SQLite database replicated to an S3-compatible bucket. Coordination happens entirely through the bucket via compare-and-swap for ownership, eliminating the need for a control plane, consensus service, or membership protocol. Nodes are replaceable since the bucket is the source of truth, and idle cells hibernate; pull requests are disabled, with patches accepted via emailed git format-patch.