{
  "id": "07-missing-cache-read",
  "description": "Missing cache_read (null) — Yield, Leverage, and 10xDEV must be null per standard null policy. Velocity and SNR are defined.",
  "input": {
    "telemetry": { "input": 1000, "output": 5000, "cache_write": 500, "cache_read": null },
    "source": { "provider": "test", "model": "test", "tool": "test" }
  },
  "expected": {
    "metrics": { "yield": null, "leverage": null, "velocity": 5.0, "snr": 0.8333, "dev10x": null },
    "warnings": ["cache_read is unavailable; Yield, Leverage, and 10xDEV are undefined.", "dev10x_undefined: requires all four pillars > 0"]
  }
}