{
  "summary": "Iteration 6 tested end-to-end. Backend: 10/10 pytest tests pass (/app/backend/tests/test_iteration6.py) — GET /api/leaderboard/global works for admin/siswa (401 unauth), returns sorted rows with rank/classes/avg_score/completed (Ani Siswa rank 1 in Kelas X-A), per-class /leaderboard/class/{id} still works, package model persists easy_min/medium_min, analytics/session returns thresholds.source='paket' when package has both set (labels items by package thresholds — 100% correct item labeled 'Mudah' at 95/80; labeled 'Sedang' at 101/80) and 'global' when nulled, global settings still 70/40. Frontend: /admin/peringkat renders leaderboard-page with default Angkatan view showing rank-row-1 (Ani Siswa 55.7 with Kelas X-A in subtitle from global endpoint); /peringkat student shows lb-angkatan section with self highlighted '(Anda)' plus Kelas X-A lb-class section; Paket dialog custom-threshold-switch toggles pkg-easy-min-input (default 70) and pkg-medium-min-input (default 40) correctly. Post-test cleanup executed — Ani Siswa avg restored to 55.7 and TEST_I6 seed data removed. Global difficulty setting unchanged at 70/40.",
  "backend_issues": {"critical": [], "minor": []},
  "frontend_issues": {
    "ui_bugs": [],
    "integration_issues": [],
    "design_issues": [
      {"screen": "Admin pages using Recharts", "issues": ["Recurring Recharts console warning 'The width(-1) and height(-1) of chart should be greater than 0' — carried over from iteration 5, still not addressed."]},
      {"screen": "Package dialog", "issues": ["Radix DialogContent warning: 'Missing Description or aria-describedby={undefined}' — add DialogDescription for a11y."]}
    ]
  },
  "test_report_links": [
    "/app/backend/tests/test_iteration6.py",
    "/app/test_reports/pytest/iteration6.xml"
  ],
  "action_items": [
    "(Optional) Fix Recharts ResponsiveContainer parent sizing to remove width(-1)/height(-1) warnings.",
    "(Optional) Add DialogDescription to Paket Soal dialog to satisfy Radix a11y warning.",
    "(Optional) Validate package easy_min/medium_min range (0..100 and medium_min<easy_min) on POST/PUT /api/packages — currently accepts easy_min=101 which yields nonsense 'Sedang' labeling for 100% correct items."
  ],
  "critical_code_review_comments": [
    "PackageBody accepts arbitrary easy_min/medium_min with no validation; server should enforce 0<=medium_min<easy_min<=100 like /settings/difficulty does.",
    "leaderboard/global re-computes classes-by-student map and per-student attempt aggregation in Python loops per request; fine at current scale but a Mongo aggregation pipeline would be O(1) DB round-trips vs O(N) students.",
    "compute_class_leaderboard duplicates most of leaderboard_global logic — extract a shared helper.",
    "server.py is >1400 lines — still recommended to split into routers (auth/exam/analytics/leaderboard/settings) for maintainability."
  ],
  "updated_files": ["/app/backend/tests/test_iteration6.py"],
  "success_rate": {"backend": "100%", "frontend": "100%"},
  "test_credentials": "admin hitoria532@gmail.com/admin123, guru guru@sekolah.id/guru123, siswa siswa@sekolah.id/siswa123 (all working)",
  "seed_data_creation": "Ephemeral TEST_I6_Cat/TEST_I6 question/TEST_I6_Paket/TEST_I6_Sesi + 1 siswa attempt created for per-package threshold test; cleaned up via API (fixture teardown) and orphan attempt purged via direct DB call. Ani Siswa avg restored to 55.7 (7 attempts). Global difficulty untouched (70/40).",
  "retest_needed": false,
  "main_agent_can_self_test": true,
  "context_for_next_testing_agent": "Iteration 6 features (Peringkat Angkatan + Ambang per Paket) fully working. Tests at /app/backend/tests/test_iteration6.py; run with REACT_APP_BACKEND_URL from frontend/.env. Note: /leaderboard/global exposed to all authenticated users (siswa included). analytics_session returns thresholds.source 'paket' iff BOTH easy_min and medium_min set on package. Ani Siswa currently rank 1 with avg 55.7 across 7 completed attempts (all orphaned to deleted sessions/packages from earlier iterations — do not delete)."
}