A bot's forever-chat now has exactly one identity: the session titled
"Bot Chat" on that bot's profile. Core UNIQUE(title) makes (profile,
'Bot Chat') an exact registry, and every open consults it directly via
session.list {title, include_hidden}. The stored-id pin
(ui_meta['hermes-bots'].chat) and its entire verification apparatus —
preferred_session_ids resolution, drifted-pin keep branches, last_session
grandfathering, dead-pin recovery re-anchoring, newerVisibleBotChat — are
removed, not deprecated. Legacy ui_meta.chat keys are ignored and dropped
from merges on sight.
Every lost-canonical-chat incident (#88146, #88200, #90524, #90705, and
five hardening waves) traced to that pointer dangling or being stolen,
then later guards welding the wrong session in. A name cannot dangle:
corrupt pins self-heal on first click because the pointer is simply never
read.
Gateway: profiles.list now reports canonical_session per profile row
(registry row resolved server-side by title — hidden rows resolve,
deny-listed sources and archived rows do not, compression lineages
resolve to the live tip), replacing the preferred_session_ids request
contract. The roster preview, activity signals, and the /new→/compact
guard all read canonical_session, so preview identity and click identity
are the same row by construction.
No migration shims: this IS the system.
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