jac-sv-multi-user

Use grant(node, level) to open a node to all logged-in users, Jac.allow_root(node, root_id, level) to share with one specific user, or write public data to root.shared. Creating a node under your own root is not enough; other users cannot see it until it is granted.

Pick the least level matching the interaction: ReadPerm for read-only access, ConnectPerm for attaching edges like follows, and WritePerm when other users mutate fields on the node, such as likes or comments stored on a tweet. Levels are cumulative, with higher including lower.

The most common cause is a missing grant: nodes created under one user's root are invisible to others until granted with grant, allow_root, or placed openly on root.shared. Grants are also per-node, not per-subtree, so granting a Profile does not grant its Tweets.

Use root.shared for genuinely public data like feeds or catalogs because it requires one traversal regardless of user count. allroots() scans every user's root per request, which is O(number of users), so reserve it for admin or fan-out scans.

No. Anonymous callers land on the guest graph while token-holders land on their own root, so a def:pub endpoint is not a single shared graph. Keep endpoints authenticated and use grant or root.shared for cross-user data instead.