Assessment Cohort Stats

curl "https://api.promptster.ai/v1/assessments/a1b2c3d4/cohort-stats?sessionId=sess_abc123" \
  -H "Authorization: Bearer psk_live_abc123def456"

{
  "cohortStats": {
    "sessionCount": 15,
    "metrics": {
      "avgDurationMs": 3120000,
      "avgPromptCount": 16.3,
      "avgCommandFailRate": 0.12,
      "avgVerifyIntensity": 1.8,
      "avgManualEditRatio": 0.28,
      "avgFirstChangeLatencyMs": 110000,
      "testPassRate": 0.73
    },
    "percentiles": {
      "durationMs": 72,
      "promptCount": 45,
      "commandFailRate": 85,
      "verifyIntensity": 68,
      "manualEditRatio": 55,
      "firstChangeLatencyMs": 80
    }
  }
}