The submit "session context drift" guard (regression 7acaff5ef / #54527,
partially fixed by 8c288760d and da52ffea1) aborted a prompt submission
whenever the selected stored id OR the route token changed mid-submit. Both
signals churn programmatically on a busy gateway, so on machines with
background streaming sessions, per-minute cron sessions, the Telegram surface,
or gateway-profile switches, essentially every send from a second chat aborted
silently: the optimistic message was dropped, the draft was left in the
composer, no error was shown, and prompt.submit never fired.
The false-positive churn sources were:
- selection null-resets — gateway-switch's setSelectedStoredSessionId(null)
on a gateway/profile switch or reconnect read as a switch away;
- search/hash-only route-token changes — overlays and side panels park state
in location.search/hash, so the pathname (the only part that selects a
chat) was unchanged yet the raw token differed;
- background-event active-ref retargets — createBackendSessionForSend's
3-prong check also watched activeSessionIdRef, which gateway events retarget
while other sessions stream (#47709 class), during a seconds-long
session.create round-trip.
New shared helper session-context-drift.ts reduces a route token to the chat it
targets (pathname only; the new-chat route is '__new__', non-chat routes null)
and reports drift only when selection or the routed chat moves to a DIFFERENT,
non-null chat that is not the submit's own target. Selection null-resets,
search/hash-only churn, and moves onto the submit target are no longer drift;
genuine user switches (click another chat, click New Session mid-submit) still
abort. Site A (submit.ts) routes all five guard points through the helper and
logs '[submit-drift-abort]' with a per-site phase; the post-create active-ref
check and baseline re-pin from 8c288760d are kept intact. Site B
(createBackendSessionForSend) drops the active-ref prong entirely — every real
switch retargets selection and route synchronously — and logs before closing
the orphaned session.
(cherry picked from commit b390e3a22ee0dacc94283cda1748e3bafae15313)
Co-authored-by: Kennedy Umege <kenmege@yahoo.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
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