A guardian with a fresh second factor mints a one-time handover link
(hlp_ token, HMAC hash stored only, 1/7/14 days, at most one open per
profile, withdrawable) with a proposed access level per guardian: end,
view only or manage, view only by default. The link is shown once with a
copy button and a QR code; nothing is mailed. The panel sits at the end
of each managed-profile row and hints when the person is under 16.
The person opens /claim/<token>, sees a minimal preview (name, expiry,
who keeps which access, no health data) and chooses a username, a
required email and a password under the registration policy. The claim
is one transaction under the managed-profile lock: the token is
consumed, the credentials are set, the marker is cleared, every pending
invitation the record offered is withdrawn, each guardian's access is
set to its proposal, the disclaimer, onboarding and AI consent are
reset, and every step is audited on the record and on each guardian's
own account. A failure anywhere leaves the profile managed and the link
unused. Each guardian is notified on their own channels.
The new owner then sees each guardian's access on the first screen after
signing in and decides finally; until then the proposal holds, and the
decision waits at the top of Shared access. A guardian whose access
moved since the claim is left alone. The same screen points the owner
at their own notification channels, since reminders no longer reach the
guardians.
Both anonymous routes refuse a single-sign-on-only instance, refuse a
live session before spending the per-address rate limit, check the link
before probing names, and answer one 404 for every unusable token. The
token travels in request bodies only; hlp_ joins the redaction and
secret-shape rules and /claim/ the path-secret registry. Usernames
starting with managed- are reserved. The session-surface and acting-
account guards list the new surfaces with their reasons.
The log and error redactor missed the registration invite token (hlv_) and
the native sign-in handoff code (hlh_). The filter that keeps secrets out
of the idempotency replay cache and out of relayed upstream error bodies
missed the handoff code and the three MCP OAuth artifacts (hlac_, hlrt_,
hlc_). Both now cover every prefix the app issues: hlk_, hlr_, hls_, hle_,
hlv_, hlh_, hlac_, hlrt_ and hlc_.
The idempotency cache refuses to persist a body carrying a HealthLog token or an AI provider key. The notification test routes are about to refuse echoing such text too, so the pattern moves to src/lib/secret-shape.ts instead of being written a second time. Behaviour of the cache is unchanged.
Marc-André Bombeck