meshbay.git/packages/meshbay-hub/src/meshbay_hub/api/users.py, branch 0.17

fix(hub): a username is unique whatever its case

2026-10-01T11:37:38Z

Registration refuses a name that differs from an existing one only by case; accounts that already do keep their names, and a pending retry needs the exact name (F-26). Co-Authored-By: Claude Opus 5.5

fix(hub): a stranger who knows your name locks only browsers you never used

2026-10-01T09:47:39Z

A sign-in from a browser that presented no token is answered with one (known_browser, kept hashed, twenty per account); a later sign-in presenting it counts failures on its own row, which nobody else can spend. Passphrase checks inside an open session (change, e-mail, deletion, device, pepper) count on the account's own row, so a locked name no longer stops its owner there either; /me reports that row. Reset and erasure forget the browsers (F-15). Co-Authored-By: Claude Opus 5.5

fix(hub): the pepper and a device key take the passphrase, not a token

2026-09-30T19:04:39Z

POST /me/bundle-pepper (was GET) and POST /users/devices require auth_key. A refreshed or lifted token could otherwise fetch the pepper, or register a device whose every sign-in carries it. Both callers have just been given the passphrase. Co-Authored-By: Claude Opus 5.5

feat: browser access, decided in the desktop application

2026-09-30T15:13:40Z

Off for an account made there: its identities stay on the device and nothing is left on nodes. Turned on from the Profile page behind a native confirmation; each node is settled when its group next opens. The hub keeps a mirror a browser reads to say why a group will not open; it grants nothing. Co-Authored-By: Claude Opus 5.5

feat: bundles sealed per node under the passphrase and the hub's pepper

2026-09-30T13:06:14Z

The session key is M = HKDF(Argon2(passphrase) || pepper, account id); each node's bundle key and the playlist key derive from it. Bundles are MBK3, bound to account and node; MBK1/MBK2 are refused by name, never replaced silently. Playlists move to key v2 and are re-sealed over unreadable node copies. Co-Authored-By: Claude Opus 5.5

feat(hub): a bundle pepper per account, handed only to a proven session

2026-09-30T11:55:59Z

Sealed at rest and bound to the account; returned by sign-in, device sign-in, a passphrase change and GET /me/bundle-pepper, never by a refresh, to a node token, in a token or in a log. Erasure clears it. Co-Authored-By: Claude Opus 5.5

fix: only the owner decides who hosts a group, and nobody is made a member unasked

2026-09-30T09:49:56Z

- hub: a node may host a group only if its account owns it or the owner approved that node (new `group_hosts`). Membership was the ceiling, and every member holds the group key, so any member's node could register as a host and be the one clients kept. A node claiming a group it may not host is recorded as a request; the owner is notified once and approves or refuses it (GET/POST/DELETE /v1/groups/{id}/hosts[/{node_id}]), which takes effect on a connected node at once. - hub: an owner adding a username creates an invitation (new `group_invitations`), accepted or declined by the invitee (/v1/groups/invitations, /{id}/invitation/accept|decline). Until then the group is not listed, not dialled, not searched and not in any token. Invitation links, open joins and group creation still make members directly: they are the account's own act. - hub: the MNP token names only the group it is minted for (group_id is now required), so a node operator no longer learns a member's other groups. - SPA: invitations on the home page; invited people and host requests in the group's settings; the transport sends group_id. Ten catalogues. - Browser probes for both screens, run in Chrome and Firefox. - Design §5.2, §7.2, §7.3, AV32, AV33; protocol §6.3; user guide. Co-Authored-By: Claude Opus 5.5

refactor: remove the public-content swarm

2026-09-28T19:35:20Z

Nodes registered the hashes of their public groups on the hub and nothing ever read them back. Routes, model and node registration removed; a migration drops swarm_sources. No node sends the hub a content hash now. Co-Authored-By: Claude Opus 5.5

fix(hub): require the passphrase to change the e-mail on file

2026-09-25T15:24:16Z

A member hands its hub access token to every node it connects to (the MNP handshake), so a node operator holds a live bearer token for that member. PATCH /v1/users/me {email} needed only that token, and the confirmation code goes to the new address — so an operator could point the account's e-mail at their own inbox, confirm it, and then use the passphrase-reset path to take the account over. This is the immediate mitigation of that chain; the full fix (a node-audience token distinct from the API session token) follows. Changing the address now requires the passphrase-derived auth_key, verified through the same throttle as a passphrase change or an account deletion — the hub still never sees the passphrase. A PATCH that does not change the address is unaffected. The profile page prompts for the passphrase and derives auth_key with the existing MeshBayKeys.deriveAuthKey, as the delete and change-password flows already do. test_email_change_requires_passphrase.py: refused without / with a wrong passphrase, proceeds with the right one, and a no-email PATCH still works; red before, green after. test_mail_is_not_a_relay.py updated to pass the auth_key. Co-Authored-By: Claude Opus 4.8

feat(hub): invitation-link tickets bound to a verified address

2026-09-23T15:46:48Z

group_invite_links holds sha256(ticket) and the invitee's address blind index; redeeming grants membership to that account only. Owner-only create/list/cancel (a node token may create, never mail), 20 outstanding per group, optional mail written by the hub itself and capped at 10 per sender per day (mail.invite_link_daily_cap). MESHBAY_DESIGN.md §3.4 now carries the whole link design. Co-Authored-By: Claude Opus 5.5