{
  "baseline": "Exact user-reported almost-perfect camera implementation, including Enter/chat fix. 14 files copied with SHA-256 before edits; all saved hashes verified.",
  "changed_files": [
    "addons/core/Scripts/Game/ERR/00_Core/ERR_ObserverPlayerView.c",
    "tests/test_observer_view_buffer.py"
  ],
  "change": "Replace packet-arrival-driven 50 ms blends with a bounded 12-pose timestamp buffer starting 100 ms behind first sample. Local elapsed-time playback, no extrapolation, 350 ms stale fallback, immediate fresh target/scope acquisition. Relay format, source sampling, body-local transform, scope logic and input remain unchanged.",
  "checks": {
    "buffer_regression": "passed: validation, position/roll/FOV, reorder rejection, expiry, target/scope switch, bounded unrendered stream, repeated reads, 30/60/144 FPS jitter/loss comparison",
    "synthetic_step_variation": [
      {
        "fps": 30,
        "buffered": 0.0336441,
        "baseline": 1.32469
      },
      {
        "fps": 60,
        "buffered": 0.0660537,
        "baseline": 0.822226
      },
      {
        "fps": 144,
        "buffered": 0.0253502,
        "baseline": 0.427864
      }
    ],
    "other_passed": [
      "test_observer_view_relay.py",
      "test_observer_scope.py",
      "test_observer_head_visibility.py",
      "test_spectator_recovery.py"
    ],
    "native_workbench": {
      "result": "compiled",
      "cleanup": {
        "cleanup_confirmed": true,
        "idle_verified": true,
        "errors": [],
        "orphan_cleanup": {
          "attempted": true,
          "report": {
            "scope": "/tmp/erri-headless-compat/pfx",
            "candidates": [],
            "term_sent": [],
            "kill_sent": [],
            "cleared": true
          }
        }
      }
    }
  },
  "limitations": [
    "Synthetic interpolation comparisons execute production method bodies adapted to C++ with native math doubled. They are not multiplayer visual measurements.",
    "Hidden Workbench compilation passed; real multiplayer smoothness and synchronization with independently replicated character/weapon animations remain unverified.",
    "The new queue adds approximately 100 ms presentation delay; body tracking and network relay are unchanged."
  ],
  "deployment": "Source only. No publishing, live-server changes or restart.",
  "rollback": "Restore changed_files from baseline/ after checking for subsequent edits. The saved smoothing.patch records exactly this change; do not reset the entire working tree."
}