{
  "feature_name": "config-upgrade-snapshot",
  "created_at": "2026-06-21T11:30:00Z",
  "updated_at": "2026-08-15T00:00:00Z",
  "language": "en",
  "phase": "implementation-complete",
  "approvals": {
    "requirements": {
      "generated": true,
      "approved": true
    },
    "design": {
      "generated": true,
      "approved": true
    },
    "tasks": {
      "generated": true,
      "approved": true
    }
  },
  "ready_for_implementation": true,
  "blocked_on": [],
  "validate_impl": {
    "decision": "GO",
    "validated_at": "2026-08-15T00:00:00Z",
    "note": "Corrected stale phase metadata (was 'tasks-generated' though every task 1-8.9 was already [x] complete). Task 8.5 reproduced bug-857 on the pre-change behavior and confirmed it no longer occurs; task 8.6's live chaotic multi-kill soak (2026-07-29) confirmed zero materialized-state/config divergence after a config upgrade. bug-857 closed as a result.",
    "known_limitations": [
      "bug-1471 / bug-1472-remainder: a host admin-closed before the final checkpoint can produce host-frame byte divergence (WAL_WORKER_CTRL apply path, worker.c/persist.c) -- explicitly out of this spec's own materialization boundary per its research.md/tasks.md notes, never converted into a task here. No existing spec currently owns fixing it; flagged for a new task/spec."
    ]
  }
}