migrated accounts lost their one-shot #account activation (host-authority rejection racing PLC propagation) and stayed upstream_status='deactivated' forever — ~0.4pp of coverage concentrated on migration-destination PDSes. - StatusChecker: background getRepoStatus re-check when a commit from the account's own confirmed host contradicts a non-active upstream status (indigo's EnsureAccountActive, queued off the frame workers) - #account events bypass the 60s negative host-authority cache: rare and one-shot, always worth a live DID-doc check - scripts/sweep_stale_upstream.py: one-time operator sweep for the quiet stuck cohort; docs/handoffs/HANDOFF-2026-08-06-stale-upstream-status.md Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>