zero

Spacefast Zero comments

A minimal Zero app with live comments, runtime-owned Akismet request metadata, Gravatar avatars, transactional email, and a live social image at /og/comments.png generated with ImageResponse.

bun install
sf dev
sf build
sf publish

What sf dev cannot show you

sf dev brokers no platform services, so addComment stops at its first ctx.spam.check call with zero_spam_unavailable. Guarding that one call is enough to post a comment locally, because ctx.email.send sits behind if (from && notify) and the two email variables are unset by default. Set them and it fails the same way, with zero_email_unavailable. ctx.gravatar.avatarUrl is fine offline: it is a hash and a query string, not a request.

The mutation does not call ctx.invalidate("comments"). A successful table write already causes live queries to refresh; explicit invalidation only narrows which named subscriptions refresh.

Optionally configure a verified sender and a fixed notification recipient:

sf env set COMMENTS_FROM_EMAIL comments@example.com
sf env set COMMENTS_NOTIFY_EMAIL team@example.com

When both are set, the comment row and email outbox row share the mutation's transaction: both commit or both roll back. Delivery happens later and is not part of the database transaction.