I've been working on this for some time now, starting with vm2, then deno-core for 2 years, and recently rewrote it on rusty_v8 with Claude's help.
OpenWorkers lets you run untrusted JS in V8 isolates on your own infrastructure. Same DX as Cloudflare Workers, no vendor lock-in.
What works today: fetch, KV, Postgres bindings, S3/R2, cron scheduling, crypto.subtle.
Self-hosting is a single docker-compose file + Postgres.
Would love feedback on the architecture and what feature you'd want next. [max_lt]