A crash mid-write destroyed the previous good snapshot — the exact
scenario persistence exists to survive; writes now go tmp+rename. The
internal-network cookie filter gains 127.*/::1/169.254.* (a tampered
state file could previously hand loopback-service cookies back to the
browser), and 'state load' imports the shared filter instead of
maintaining a comment-synced copy. Test cleanup made exception-safe.
BROWSE_PERSIST_STATE=1 snapshots cookies + per-tab URL/localStorage/
sessionStorage to <stateDir>/session-state.json (0600) on a 30s unref'd
interval and at clean shutdown, and restores on the next launch — killing
the top-complained auth-lost-on-restart class (#778, #2193, #1128, #1129).
Security invariants mirror state save|load: loadedHtml and owner are never
persisted and never accepted from disk; restored cookies pass the same
hygiene filter (localhost/.internal/metadata domains dropped); restoreState
re-validates every URL. Default OFF; headed mode excluded (the persistent
profile owns that state). Hardened past the fork's shape per review R3:
corrupt state quarantines to .corrupt (forensic artifact, boots fresh, one
log line), snapshot failures warn once and never kill the daemon, and the
boot log reports restored counts or fresh-session status.
Module + 10 tests ported (MIT header retained); server wiring at launch,
interval, and shutdown; skill docs section added (regen rides the cluster
regen commit).
Ported from time-attack/gstack (GStack 2).
Co-authored-by: Sina Matian <sina@time-attack.dev>
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Garry Tan