Deno ships self-hosted Durable Objects in Rust

Deno's celld project shipped a self-hosted implementation of Durable Objects in Rust, climbing to 1,938 GitHub stars after adding 546 in a single day, per the repo.

Durable Objects are the piece several AI agent runtimes lean on to hold per-session state, the thing that remembers where a conversation or a task left off. That primitive has lived inside Cloudflare's edge network. celld, licensed under Apache-2.0, reimplements the same actor model as software you run yourself, with its own site at celld.dev and a last push on August 5.

That distinction matters. Teams that built session state around Durable Objects were making an infrastructure bet on one vendor's edge. celld doesn't change what the primitive does. It changes who controls where it runs.

The repo doesn't say how celld performs against Cloudflare's managed version under real load, or whether it replicates across regions the same way. Those gaps decide whether this becomes a real alternative or stays a GitHub curiosity.

The trade

My take: celld won't dent Cloudflare's Durable Objects revenue. What it kills is the argument that the actor model only runs on Cloudflare's edge. Watch whether an agent framework adopts it as a backend option instead of linking to the repo approvingly.

The star count jumped from roughly 1,392 to 1,938 in a single day, even though the last code push was two days earlier. The interest is happening fast; the code itself isn't moving that quickly.