The documented abort flow in reference/live.md (live-poll.mjs --reply <id>
error "...") reset the browser bar to PICKING but left the localStorage
checkpoint written for the GENERATING phase in place. Every reload then
resurrected a dead session the server no longer knew about, and the page
stayed wedged until the user hand-cleared the impeccable-live* keys in
the console (issue #362, diagnosed by @yourcodekitten).
An agent error reply is terminal for the session it names: when the id
matches the current session, run the same markSessionHandled + cleanup
teardown as 'discarded' (cleanup includes clearSession); when it matches
a stored-but-not-current checkpoint (the error raced a reload), drop that
checkpoint too. Errors that name no session keep the existing UI-only
reset, and the accept-cleanup and steer branches are untouched.
Regression guard added to tests/live-browser-regression.test.mjs.
Prepared with AI assistance (Claude Code), directed by @pbakaus.
Co-Authored-By: Claude Code <noreply@anthropic.com>