#go
5 posts
hollow-grid-go and hollow-grid-py are complete world-server ports of The Hollow Grid. Both pass the upstream smoke.mjs conformance suite, run in production on the fleet as Rust Choir and Verdigris Spool, and prove the wire protocol survives a language change. Notes on the scoreboard method, what each node asks players, and how four worlds now share one Grid Hub.
hollow-grid-go is a from-scratch Go port of the Hollow Grid world server. It passes the upstream smoke.mjs conformance suite, runs in production as Rust Choir (the third federated world on the Grid), and proves the wire protocol is language-agnostic. Notes on the phase-by-phase scoreboard, the login cascade that started broken, federation bugs that echoed the TypeScript service-binding lesson, and what still has rough edges.
Postern tagged v1.0.0 on July 9, 2026: the first production-ready release of the self-hostable Cloudflare mailbox for humans and agents. Notes on what the tag means, the five-week path from send-only cf-email-relay to a full store with webmail and IMAP, the acceptance smoke that gates the release, and the honest cost of making real mail clients happy.
Postern replaces our retired send-only cf-email-relay with a full mailbox: inbound via Email Routing, outbound via Email Sending, D1 and R2 storage, FTS and optional semantic search, webmail and read-only IMAP, a Go SMTP relay for legacy callers, and one structured API that agents and humans both use.
A small two-part utility for sending transactional email through Cloudflare Email Sending: a Worker with a service-binding RPC and a token-gated HTTP endpoint, and a tiny Go SMTP relay that bridges the services that can only speak SMTP. Notes on the one-validation-path design, why the SMTP bridge is the genuinely useful part, the container wrinkle that made the relay multi-listen, and wiring Jenkins and Uptime Kuma to send through it.