{"abstract":"A swing that ends at the window edge is missed.","category":"Seismic magnitude estimation","checks":8,"contract":"Integer counts. If any |sample| >= 0.95*full_scale (integer-truncated) return [\"clipped\", None]. Otherwise turning points are the first sample, every interior sample that is a peak (b > a and b >= c) or trough (b < a and b <= c), and the last sample; the amplitude is half the largest absolute difference between consecutive turning points. Return [\"ok\", amplitude].","contract_signature":"samples, full_scale","evaluation_group":"w2-seismic_magnitude_estimation-amplitude-pick","failed_approach":"Appending the penultimate sample still omits the final excursion.","family":"w2-seismic_magnitude_estimation-amplitude-pick-final-sample-turning-point","id":"FA-71586","implementations":{"attempt":{"sha256":"a7536130519dc8f074fe4fb1d8339048e8642e7fca781ac59fb32cff391c4ae4","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(samples, full_scale):\n    limit = int(full_scale * 0.95)\n    if any(abs(s) >= limit for s in samples):\n        return [\"clipped\", None]\n    turn = [samples[0]]\n    for i in range(1, len(samples) - 1):\n        a, b, c = samples[i - 1], samples[i], samples[i + 1]\n        if (b > a and b >= c) or (b < a and b <= c):\n            turn.append(b)\n    turn.append(samples[-2])\n    best = max(abs(turn[i] - turn[i - 1]) for i in range(1, len(turn)))\n    return [\"ok\", best / 2]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['segment 0', [[30, -120, 1000], 1000], ['clipped', None]], ['segment 1', [[-500, 30, 1000, 1000, 1000, 200, 450], 1000], ['clipped', None]], ['segment 3', [[-120, 0, -120, -900, 200, -900, 1000, 200], 1000], ['clipped', None]], ['segment 4', [[30, -120, 1000, 1000, -120, 1000], 1000], ['clipped', None]], ['segment 5', [[1000, 1000, -900], 1000], ['clipped', None]], ['segment 6', [[30, -40, 30, -500], 1000], ['ok', 265.0]], ['segment 7', [[-120, 950, 200, 450], 1000], ['clipped', None]], ['segment 22', [[-500, -900, -40], 1000], ['ok', 430.0]]], [['segment 8', [[1000, 200, 450, -120], 1000], ['clipped', None]], ['segment 9', [[-120, 1000, -40, -120, 450], 1000], ['clipped', None]], ['segment 10', [[200, 1000, -40], 1000], ['clipped', None]], ['segment 11', [[1000, 450, -900, 0, 1000], 1000], ['clipped', None]], ['segment 12', [[950, 0, 1000], 1000], ['clipped', None]], ['segment 13', [[30, -120, -120, 0, 30, 450, -120], 1000], ['ok', 285.0]], ['segment 22', [[-500, -900, -40], 1000], ['ok', 430.0]], ['segment 25', [[-120, -500, -500, 30], 1000], ['ok', 265.0]]], [['segment 16', [[-900, -500, -500], 1000], ['ok', 200.0]], ['segment 17', [[-500, -120, 1000, -120], 1000], ['clipped', None]], ['segment 18', [[950, -40, 450], 1000], ['clipped', None]], ['segment 19', [[-500, 30, -500, 200, -120], 1000], ['ok', 350.0]], ['segment 20', [[-40, 30, 0, 30, 450, 450], 1000], ['ok', 225.0]], ['segment 21', [[1000, -900, 200, -120, 1000, 1000, 200], 1000], ['clipped', None]], ['segment 22', [[-500, -900, -40], 1000], ['ok', 430.0]], ['segment 23', [[30, 0, 450, 450, 450, -900], 1000], ['ok', 675.0]]], [['segment 22', [[-500, -900, -40], 1000], ['ok', 430.0]], ['segment 23', [[30, 0, 450, 450, 450, -900], 1000], ['ok', 675.0]], ['segment 24', [[30, -500, 450, 30, -40], 1000], ['ok', 475.0]], ['segment 25', [[-120, -500, -500, 30], 1000], ['ok', 265.0]], ['segment 26', [[1000, 1000, 0, 30, 0, 30, -120, -900, -900], 1000], ['clipped', None]], ['segment 27', [[0, 200, 30, -500, -500, 1000, 450, -120], 1000], ['clipped', None]], ['segment 28', [[-40, 200, 950, -500], 1000], ['clipped', None]], ['end swing', [[0, 10, 5, 400], 1000], ['ok', 197.5]]], [['segment 22', [[-500, -900, -40], 1000], ['ok', 430.0]], ['segment 23', [[30, 0, 450, 450, 450, -900], 1000], ['ok', 675.0]], ['segment 30', [[-40, 30, -40, 1000, -900, 950, 30, 1000, -500], 1000], ['clipped', None]], ['segment 31', [[200, -900, -120, -500, -120, 950, -500, 30, 450], 1000], ['clipped', None]], ['segment 32', [[-900, 950, 450, 30, 450], 1000], ['clipped', None]], ['segment 33', [[0, 30, 1000, 30, -900], 1000], ['clipped', None]], ['exactly at clip threshold', [[0, 950, -100, 20], 1000], ['clipped', None]], ['plateau peak', [[0, 300, 300, -100, 0], 1000], ['ok', 200.0]]]]\nfor label, args, expected in fixtures[N - 1]:\n    check(label, solve(*args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"broken":{"sha256":"39d6884afb73a1fbe12767517896f50ca9303871dbd73aaabebcce77ef16c96b","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(samples, full_scale):\n    limit = int(full_scale * 0.95)\n    if any(abs(s) >= limit for s in samples):\n        return [\"clipped\", None]\n    turn = [samples[0]]\n    for i in range(1, len(samples) - 1):\n        a, b, c = samples[i - 1], samples[i], samples[i + 1]\n        if (b > a and b >= c) or (b < a and b <= c):\n            turn.append(b)\n    best = max(abs(turn[i] - turn[i - 1]) for i in range(1, len(turn)))\n    return [\"ok\", best / 2]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['segment 0', [[30, -120, 1000], 1000], ['clipped', None]], ['segment 1', [[-500, 30, 1000, 1000, 1000, 200, 450], 1000], ['clipped', None]], ['segment 3', [[-120, 0, -120, -900, 200, -900, 1000, 200], 1000], ['clipped', None]], ['segment 4', [[30, -120, 1000, 1000, -120, 1000], 1000], ['clipped', None]], ['segment 5', [[1000, 1000, -900], 1000], ['clipped', None]], ['segment 6', [[30, -40, 30, -500], 1000], ['ok', 265.0]], ['segment 7', [[-120, 950, 200, 450], 1000], ['clipped', None]], ['segment 22', [[-500, -900, -40], 1000], ['ok', 430.0]]], [['segment 8', [[1000, 200, 450, -120], 1000], ['clipped', None]], ['segment 9', [[-120, 1000, -40, -120, 450], 1000], ['clipped', None]], ['segment 10', [[200, 1000, -40], 1000], ['clipped', None]], ['segment 11', [[1000, 450, -900, 0, 1000], 1000], ['clipped', None]], ['segment 12', [[950, 0, 1000], 1000], ['clipped', None]], ['segment 13', [[30, -120, -120, 0, 30, 450, -120], 1000], ['ok', 285.0]], ['segment 22', [[-500, -900, -40], 1000], ['ok', 430.0]], ['segment 25', [[-120, -500, -500, 30], 1000], ['ok', 265.0]]], [['segment 16', [[-900, -500, -500], 1000], ['ok', 200.0]], ['segment 17', [[-500, -120, 1000, -120], 1000], ['clipped', None]], ['segment 18', [[950, -40, 450], 1000], ['clipped', None]], ['segment 19', [[-500, 30, -500, 200, -120], 1000], ['ok', 350.0]], ['segment 20', [[-40, 30, 0, 30, 450, 450], 1000], ['ok', 225.0]], ['segment 21', [[1000, -900, 200, -120, 1000, 1000, 200], 1000], ['clipped', None]], ['segment 22', [[-500, -900, -40], 1000], ['ok', 430.0]], ['segment 23', [[30, 0, 450, 450, 450, -900], 1000], ['ok', 675.0]]], [['segment 22', [[-500, -900, -40], 1000], ['ok', 430.0]], ['segment 23', [[30, 0, 450, 450, 450, -900], 1000], ['ok', 675.0]], ['segment 24', [[30, -500, 450, 30, -40], 1000], ['ok', 475.0]], ['segment 25', [[-120, -500, -500, 30], 1000], ['ok', 265.0]], ['segment 26', [[1000, 1000, 0, 30, 0, 30, -120, -900, -900], 1000], ['clipped', None]], ['segment 27', [[0, 200, 30, -500, -500, 1000, 450, -120], 1000], ['clipped', None]], ['segment 28', [[-40, 200, 950, -500], 1000], ['clipped', None]], ['end swing', [[0, 10, 5, 400], 1000], ['ok', 197.5]]], [['segment 22', [[-500, -900, -40], 1000], ['ok', 430.0]], ['segment 23', [[30, 0, 450, 450, 450, -900], 1000], ['ok', 675.0]], ['segment 30', [[-40, 30, -40, 1000, -900, 950, 30, 1000, -500], 1000], ['clipped', None]], ['segment 31', [[200, -900, -120, -500, -120, 950, -500, 30, 450], 1000], ['clipped', None]], ['segment 32', [[-900, 950, 450, 30, 450], 1000], ['clipped', None]], ['segment 33', [[0, 30, 1000, 30, -900], 1000], ['clipped', None]], ['exactly at clip threshold', [[0, 950, -100, 20], 1000], ['clipped', None]], ['plateau peak', [[0, 300, 300, -100, 0], 1000], ['ok', 200.0]]]]\nfor label, args, expected in fixtures[N - 1]:\n    check(label, solve(*args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"}},"limitations":"Stipulated deterministic teaching model of a seismological magnitude procedure; constants and tables are fixed by the contract and no claim of agency or standards conformance is made. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.","method":"Deterministic executable model with adversarial boundary fixtures.","provenance":{"created_by":"Failure Map","dependencies":"Python standard library","family":"w2-seismic_magnitude_estimation-amplitude-pick-final-sample-turning-point","generated_at":"2026-09-29T14:48:31.004404+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Magnitude amplitudes must not come from clipped records and use half peak-to-trough swings.","root_cause":"The last sample is not added as a turning point.","sha256":"18a82df7ba1d6d83aa24b7154179d49eef89c0ce4e9aa4f709060c488efe9b53","title":"Clipping-aware amplitude pick: final sample turning point · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":39.595,"exit_code":1,"observations":[{"actual":["clipped",null],"check":"segment 0","expected":["clipped",null],"passed":true},{"actual":["clipped",null],"check":"segment 1","expected":["clipped",null],"passed":true},{"actual":["clipped",null],"check":"segment 3","expected":["clipped",null],"passed":true},{"actual":["clipped",null],"check":"segment 4","expected":["clipped",null],"passed":true},{"actual":["clipped",null],"check":"segment 5","expected":["clipped",null],"passed":true},{"actual":["ok",35.0],"check":"segment 6","expected":["ok",265.0],"passed":false},{"actual":["clipped",null],"check":"segment 7","expected":["clipped",null],"passed":true},{"actual":["ok",200.0],"check":"segment 22","expected":["ok",430.0],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"segment 0\", \"actual\": [\"clipped\", null], \"expected\": [\"clipped\", null], \"passed\": true}, {\"check\": \"segment 1\", \"actual\": [\"clipped\", null], \"expected\": [\"clipped\", null], \"passed\": true}, {\"check\": \"segment 3\", \"actual\": [\"clipped\", null], \"expected\": [\"clipped\", null], \"passed\": true}, {\"check\": \"segment 4\", \"actual\": [\"clipped\", null], \"expected\": [\"clipped\", null], \"passed\": true}, {\"check\": \"segment 5\", \"actual\": [\"clipped\", null], \"expected\": [\"clipped\", null], \"passed\": true}, {\"check\": \"segment 6\", \"actual\": [\"ok\", 35.0], \"expected\": [\"ok\", 265.0], \"passed\": false}, {\"check\": \"segment 7\", \"actual\": [\"clipped\", null], \"expected\": [\"clipped\", null], \"passed\": true}, {\"check\": \"segment 22\", \"actual\": [\"ok\", 200.0], \"expected\": [\"ok\", 430.0], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":41.507,"exit_code":1,"observations":[{"actual":["clipped",null],"check":"segment 0","expected":["clipped",null],"passed":true},{"actual":["clipped",null],"check":"segment 1","expected":["clipped",null],"passed":true},{"actual":["clipped",null],"check":"segment 3","expected":["clipped",null],"passed":true},{"actual":["clipped",null],"check":"segment 4","expected":["clipped",null],"passed":true},{"actual":["clipped",null],"check":"segment 5","expected":["clipped",null],"passed":true},{"actual":["ok",35.0],"check":"segment 6","expected":["ok",265.0],"passed":false},{"actual":["clipped",null],"check":"segment 7","expected":["clipped",null],"passed":true},{"actual":["ok",200.0],"check":"segment 22","expected":["ok",430.0],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"segment 0\", \"actual\": [\"clipped\", null], \"expected\": [\"clipped\", null], \"passed\": true}, {\"check\": \"segment 1\", \"actual\": [\"clipped\", null], \"expected\": [\"clipped\", null], \"passed\": true}, {\"check\": \"segment 3\", \"actual\": [\"clipped\", null], \"expected\": [\"clipped\", null], \"passed\": true}, {\"check\": \"segment 4\", \"actual\": [\"clipped\", null], \"expected\": [\"clipped\", null], \"passed\": true}, {\"check\": \"segment 5\", \"actual\": [\"clipped\", null], \"expected\": [\"clipped\", null], \"passed\": true}, {\"check\": \"segment 6\", \"actual\": [\"ok\", 35.0], \"expected\": [\"ok\", 265.0], \"passed\": false}, {\"check\": \"segment 7\", \"actual\": [\"clipped\", null], \"expected\": [\"clipped\", null], \"passed\": true}, {\"check\": \"segment 22\", \"actual\": [\"ok\", 200.0], \"expected\": [\"ok\", 430.0], \"passed\": false}], \"passed\": false}\n"}},"member_only":{"stages":["fixed"],"fields":["implementations.fixed","verification.fixed","harness","repair"],"note":"The verified repair, its recorded checks, the repair description, and the scoring harness are available to members."}}