DeepSeek V4.1 Flash (Venice) (thinking on) on AIS collision risk: closest point of approach and alert levels

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   "final_message": "All checks pass. Summary:\n\n**`solve.py`** (Python 3 stdlib only) implements the spec:\n\n- **Filtering**: skips targets with missing/null `lat`/`lon`/`cog`/`sog`, `sog >= 102.3`, or `cog >= 360`; skipped MMSIs sorted ascending, valid targets kept in input order.\n- **Geometry**: local flat nm frame (`x = \u0394lon\u00b760\u00b7cos(lat)`, `y = \u0394lat\u00b760`), velocity `(sog\u00b7sin(cog), sog\u00b7cos(cog))`, relative `r`/`v`, `TCPA = max(0, -(r\u00b7v)/|v|\u00b2)` (0 if `|v|\u00b2 < 1e-9`), `CPA = |r + v\u00b7TCPA|`, plus `range_nm`, `bearing_deg = atan2(x,y) mod 360`, `tcpa_min = TCPA\u00b760`.\n- **Levels/alerts**: `danger`/`caution`/`none` by CPA and TCPA thresholds; alerts list danger then caution, each sorted by `tcpa_min` then `mmsi`.\n- **Rounding**: range/CPA 3 dp, bearing 1 dp, tcpa_min 2 dp.\n- **`radar.svg`**: static self-contained SVG (root `<svg>`, no scripts/images/links/external assets) with `id=\"own-ship\"` and `id=\"target-<mmsi>\"` for every non-skipped target.\n\nVerified on the provided input (2 skipped: `340778672` cog=360, `660159254` sog=102.3; alerts `[795070736, 613463677, 265918776, 562375419]`) and on a synthetic edge-case input (null field, zero-speed target, head-on collision). SVG parses as valid XML with all required IDs.",
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    "result": "{\n \"own\": {\n  \"lat\": 46.95882,\n  \"lon\": -127.13341,\n  \"cog\": 298,\n  \"sog\": 4.2\n },\n \"targets\": [\n  {\n   \"mmsi\": 795070736,\n   \"lat\": 46.83549,\n   \"lon\": -127.20639,\n   \"cog\": 14.0,\n   \"sog\": 41.3\n  },\n  {\n   \"mmsi\": 276139249,\n   \"lat\": 47.04512,\n   \"lon\": -127.14288,\n   \"cog\": 274.7,\n   \"sog\": 14.0\n  },\n  {\n   \"mmsi\": 660159254,\n   \"lat\": 46.94775,\n   \"lon\": -127.11005,\n   \"cog\": 158.2,\n   \"sog\": 102.3\n  },\n  {\n   \"mmsi\": 265918776,\n   \"lat\": 47.00577,\n   \"lon\": -127.29469,\n   \"cog\": 118.4,\n   \"sog\": 65.0\n  },\n  {\n   \"mmsi\": 743277030,\n   \"lat\": 46.96679,\n   \"lon\": -126.9877,\n   \"cog\": 276.4,\n   \"sog\": 15.0\n  },\n  {\n   \"mmsi\": 562375419,\n   \"lat\": 46.94375,\n   \"lon\": -127.0556,\n   \"cog\": 298.3,\n   \"sog\": 11.9\n  },\n  {\n   \"mmsi\": 613463677,\n   \"lat\": 47.0609,\n   \"lon\": -127.13599,\n   \"cog\": 187.0,\n   \"sog\": 26.0\n  },\n  {\n   \"mmsi\": 340778672,\n   \"lat\": 46.96234,\n   \"lon\": -127.07372,\n   \"cog\": 360.0,\n   \"sog\": 11.2\n  },\n  {\n   \"mmsi\": 286629533,\n   \"lat\": 47.0064,\n   \"lon\": -127.19976,\n   \"cog\": 214.3,\n   \"sog\": 0.0\n  },\n  {\n   \"mmsi\": 637679438,\n   \"lat\": 46.90575,\n   \"lon\": -127.01879,\n   \"cog\": 27.4,\n   \"sog\": 19.4\n  },\n  {\n   \"mmsi\": 327721356,\n   \"lat\": 46.9028,\n   \"lon\": -127.06074,\n   \"cog\": 204.2,\n   \"sog\": 10.7\n  },\n  {\n   \"mmsi\": 777617410,\n   \"lat\": 46.84177,\n   \"lon\": -127.07896,\n   \"cog\": 351.5,\n   \"sog\": 8.5\n  }\n ],\n \"cpa_danger_nm\": 0.5,\n \"cpa_caution_nm\": 1.0,\n \"tcpa_max_min\": 30\n}"
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           "arguments": "{\"path\":\"solve.py\",\"content\":\"#!/usr/bin/env python3\\n\\\"\\\"\\\"AIS collision risk: CPA, TCPA and alert levels.\\n\\nUsage: python solve.py input.json answer.json\\nWrites answer.json and radar.svg (static, self-contained).\\n\\\"\\\"\\\"\\nimport json\\nimport math\\nimport sys\\n\\n\\ndef is_missing(v):\\n    return v is None\\n\\n\\ndef valid_target(t):\\n    for key in (\\\"lat\\\", \\\"lon\\\", \\\"cog\\\", \\\"sog\\\"):\\n        if key not in t or is_missing(t[key]):\\n            return False\\n    try:\\n        sog = float(t[\\\"sog\\\"])\\n        cog = float(t[\\\"cog\\\"])\\n    except (TypeError, ValueError):\\n        return False\\n    if sog >= 102.3:\\n        return False\\n    if cog >= 360:\\n        return False\\n    return True\\n\\n\\ndef compute(own, t):\\n    lat0 = float(own[\\\"lat\\\"])\\n    lon0 = float(own[\\\"lon\\\"])\\n    coslat = math.cos(math.radians(lat0))\\n\\n    # Local flat frame (nm)\\n    x = (float(t[\\\"lon\\\"]) - lon0) * 60.0 * coslat\\n    y = (float(t[\\\"lat\\\"]) - lat0) * 60.0\\n\\n    # Velocities (knots)\\n    cog_o = math.radians(float(own[\\\"cog\\\"]))\\n    sog_o = float(own[\\\"sog\\\"])\\n    vox = sog_o * math.sin(cog_o)\\n    voy = sog_o * math.cos(cog_o)\\n\\n    cog_t = math.radians(float(t[\\\"cog\\\"]))\\n    sog_t = float(t[\\\"sog\\\"])\\n    vtx = sog_t * math.sin(cog_t)\\n    vty = sog_t * math.cos(cog_t)\\n\\n    rx, ry = x, y\\n    vx = vtx - vox\\n    vy = vty - voy\\n\\n    v2 = vx * vx + vy * vy\\n    if v2 < 1e-9:\\n        tcpa = 0.0\\n    else:\\n        tcpa = max(0.0, -(rx * vx + ry * vy) / v2)\\n\\n    cpx = rx + vx * tcpa\\n    cpy = ry + vy * tcpa\\n    cpa = math.hypot(cpx, cpy)\\n\\n    rng = math.hypot(rx, ry)\\n    bearing = math.degrees(math.atan2(rx, ry)) % 360.0\\n    tcpa_min = tcpa * 60.0\\n\\n    return rng, bearing, cpa, tcpa_min\\n\\n\\ndef level_for(cpa, tcpa_min, danger, caution, tcpa_max):\\n    if cpa <= danger and tcpa_min <= tcpa_max:\\n        return \\\"danger\\\"\\n    if cpa <= caution and tcpa_min <= tcpa_max:\\n        return \\\"caution\\\"\\n    return \\\"none\\\"\\n\\n\\ndef make_svg(own, results):\\n    \\\"\\\"\\\"Static self-contained radar SVG.\\\"\\\"\\\"\\n    size = 600\\n    cx = cy = size / 2.0\\n    max_range = 12.0  # nm displayed radius\\n    scale = (size / 2.0 - 30.0) / max_range\\n\\n    parts = []\\n    parts.append(\\n        '<svg xmlns=\\\"http://www.w3.org/2000/svg\\\" width=\\\"%d\\\" height=\\\"%d\\\" '\\n        'viewBox=\\\"0 0 %d %d\\\">' % (size, size, size, size)\\n    )\\n    parts.append('<rect width=\\\"%d\\\" height=\\\"%d\\\" fill=\\\"#0b1a0b\\\"/>' % (size, size))\\n    # range rings\\n    for i in range(1, 5):\\n        r = (size / 2.0 - 30.0) * i / 4.0\\n        parts.append(\\n            '<circle cx=\\\"%.1f\\\" cy=\\\"%.1f\\\" r=\\\"%.1f\\\" fill=\\\"none\\\" '\\n            'stroke=\\\"#1f5f1f\\\" stroke-width=\\\"1\\\"/>' % (cx, cy, r)\\n        )\\n    # cross hairs\\n    parts.append(\\n        '<line x1=\\\"%.1f\\\" y1=\\\"30\\\" x2=\\\"%.1f\\\" y2=\\\"%d\\\" stroke=\\\"#1f5f1f\\\" '\\n        'stroke-width=\\\"1\\\"/>' % (cx, cx, size - 30)\\n    )\\n    parts.append(\\n        '<line x1=\\\"30\\\" y1=\\\"%.1f\\\" x2=\\\"%d\\\" y2=\\\"%.1f\\\" stroke=\\\"#1f5f1f\\\" '\\n        'stroke-width=\\\"1\\\"/>' % (cy, size - 30, cy)\\n    )\\n\\n    # own ship at center\\n    parts.append(\\n        '<polygon id=\\\"own-ship\\\" points=\\\"%.1f,%.1f %.1f,%.1f %.1f,%.1f\\\" '\\n        'fill=\\\"#33ff33\\\"/>' % (\\n            cx, cy - 8, cx - 5, cy + 6, cx + 5, cy + 6)\\n    )\\n\\n    colors = {\\\"danger\\\": \\\"#ff3333\\\", \\\"caution\\\": \\\"#ffcc00\\\", \\\"none\\\": \\\"#33ccff\\\"}\\n    for res in results:\\n        mmsi = res[\\\"mmsi\\\"]\\n        rng = res[\\\"range_nm\\\"]\\n        brg = math.radians(res[\\\"bearing_deg\\\"])\\n        px = cx + rng * math.sin(brg) * scale\\n        py = cy - rng * math.cos(brg) * scale\\n        col = colors.get(res[\\\"level\\\"], \\\"#33ccff\\\")\\n        parts.append(\\n            '<circle id=\\\"target-%s\\\" cx=\\\"%.1f\\\" cy=\\\"%.1f\\\" r=\\\"5\\\" '\\n            'fill=\\\"%s\\\"/>' % (mmsi, px, py, col)\\n        )\\n\\n    parts.append(\\\"</svg>\\\")\\n    return \\\"\\\\n\\\".join(parts)\\n\\n\\ndef main():\\n    if len(sys.argv) < 3:\\n        print(\\\"usage: python solve.py input.json answer.json\\\", file=sys.stderr)\\n        return 1\\n    in_path = sys.argv[1]\\n    out_path = sys.argv[2]\\n\\n    with open(in_path, \\\"r\\\") as f:\\n        data = json.load(f)\\n\\n    own = data[\\\"own\\\"]\\n    targets = data.get(\\\"targets\\\", [])\\n    danger = float(data[\\\"cpa_danger_nm\\\"])\\n    caution = float(data[\\\"cpa_caution_nm\\\"])\\n    tcpa_max = float(data[\\\"tcpa_max_min\\\"])\\n\\n    skipped = []\\n    results = []\\n    for t in targets:\\n        if not valid_target(t):\\n            skipped.append(t.get(\\\"mmsi\\\"))\\n            continue\\n        rng, bearing, cpa, tcpa_min = compute(own, t)\\n        lvl = level_for(cpa, tcpa_min, danger, caution, tcpa_max)\\n        results.append({\\n            \\\"mmsi\\\": t[\\\"mmsi\\\"],\\n            \\\"range_nm\\\": round(rng, 3),\\n            \\\"bearing_deg\\\": round(bearing, 1),\\n            \\\"cpa_nm\\\": round(cpa, 3),\\n            \\\"tcpa_min\\\": round(tcpa_min, 2),\\n            \\\"level\\\": lvl,\\n        })\\n\\n    skipped.sort()\\n\\n    danger_list = [r for r in results if r[\\\"level\\\"] == \\\"danger\\\"]\\n    caution_list = [r for r in results if r[\\\"level\\\"] == \\\"caution\\\"]\\n    danger_list.sort(key=lambda r: (r[\\\"tcpa_min\\\"], r[\\\"mmsi\\\"]))\\n    caution_list.sort(key=lambda r: (r[\\\"tcpa_min\\\"], r[\\\"mmsi\\\"]))\\n    alerts = [r[\\\"mmsi\\\"] for r in danger_list] + [r[\\\"mmsi\\\"] for r in caution_list]\\n\\n    answer = {\\n        \\\"targets\\\": results,\\n        \\\"skipped\\\": skipped,\\n        \\\"alerts\\\": alerts,\\n    }\\n\\n    with open(out_path, \\\"w\\\") as f:\\n        json.dump(answer, f, indent=1)\\n\\n    svg = make_svg(own, results)\\n    with open(\\\"radar.svg\\\", \\\"w\\\") as f:\\n        f.write(svg)\\n\\n    return 0\\n\\n\\nif __name__ == \\\"__main__\\\":\\n    sys.exit(main())\\n\"}"
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     "path": "solve.py",
     "content": "#!/usr/bin/env python3\n\"\"\"AIS collision risk: CPA, TCPA and alert levels.\n\nUsage: python solve.py input.json answer.json\nWrites answer.json and radar.svg (static, self-contained).\n\"\"\"\nimport json\nimport math\nimport sys\n\n\ndef is_missing(v):\n    return v is None\n\n\ndef valid_target(t):\n    for key in (\"lat\", \"lon\", \"cog\", \"sog\"):\n        if key not in t or is_missing(t[key]):\n            return False\n    try:\n        sog = float(t[\"sog\"])\n        cog = float(t[\"cog\"])\n    except (TypeError, ValueError):\n        return False\n    if sog >= 102.3:\n        return False\n    if cog >= 360:\n        return False\n    return True\n\n\ndef compute(own, t):\n    lat0 = float(own[\"lat\"])\n    lon0 = float(own[\"lon\"])\n    coslat = math.cos(math.radians(lat0))\n\n    # Local flat frame (nm)\n    x = (float(t[\"lon\"]) - lon0) * 60.0 * coslat\n    y = (float(t[\"lat\"]) - lat0) * 60.0\n\n    # Velocities (knots)\n    cog_o = math.radians(float(own[\"cog\"]))\n    sog_o = float(own[\"sog\"])\n    vox = sog_o * math.sin(cog_o)\n    voy = sog_o * math.cos(cog_o)\n\n    cog_t = math.radians(float(t[\"cog\"]))\n    sog_t = float(t[\"sog\"])\n    vtx = sog_t * math.sin(cog_t)\n    vty = sog_t * math.cos(cog_t)\n\n    rx, ry = x, y\n    vx = vtx - vox\n    vy = vty - voy\n\n    v2 = vx * vx + vy * vy\n    if v2 < 1e-9:\n        tcpa = 0.0\n    else:\n        tcpa = max(0.0, -(rx * vx + ry * vy) / v2)\n\n    cpx = rx + vx * tcpa\n    cpy = ry + vy * tcpa\n    cpa = math.hypot(cpx, cpy)\n\n    rng = math.hypot(rx, ry)\n    bearing = math.degrees(math.atan2(rx, ry)) % 360.0\n    tcpa_min = tcpa * 60.0\n\n    return rng, bearing, cpa, tcpa_min\n\n\ndef level_for(cpa, tcpa_min, danger, caution, tcpa_max):\n    if cpa <= danger and tcpa_min <= tcpa_max:\n        return \"danger\"\n    if cpa <= caution and tcpa_min <= tcpa_max:\n        return \"caution\"\n    return \"none\"\n\n\ndef make_svg(own, results):\n    \"\"\"Static self-contained radar SVG.\"\"\"\n    size = 600\n    cx = cy = size / 2.0\n    max_range = 12.0  # nm displayed radius\n    scale = (size / 2.0 - 30.0) / max_range\n\n    parts = []\n    parts.append(\n        '<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"%d\" height=\"%d\" '\n        'viewBox=\"0 0 %d %d\">' % (size, size, size, size)\n    )\n    parts.append('<rect width=\"%d\" height=\"%d\" fill=\"#0b1a0b\"/>' % (size, size))\n    # range rings\n    for i in range(1, 5):\n        r = (size / 2.0 - 30.0) * i / 4.0\n        parts.append(\n            '<circle cx=\"%.1f\" cy=\"%.1f\" r=\"%.1f\" fill=\"none\" '\n            'stroke=\"#1f5f1f\" stroke-width=\"1\"/>' % (cx, cy, r)\n        )\n    # cross hairs\n    parts.append(\n        '<line x1=\"%.1f\" y1=\"30\" x2=\"%.1f\" y2=\"%d\" stroke=\"#1f5f1f\" '\n        'stroke-width=\"1\"/>' % (cx, cx, size - 30)\n    )\n    parts.append(\n        '<line x1=\"30\" y1=\"%.1f\" x2=\"%d\" y2=\"%.1f\" stroke=\"#1f5f1f\" '\n        'stroke-width=\"1\"/>' % (cy, size - 30, cy)\n    )\n\n    # own ship at center\n    parts.append(\n        '<polygon id=\"own-ship\" points=\"%.1f,%.1f %.1f,%.1f %.1f,%.1f\" '\n        'fill=\"#33ff33\"/>' % (\n            cx, cy - 8, cx - 5, cy + 6, cx + 5, cy + 6)\n    )\n\n    colors = {\"danger\": \"#ff3333\", \"caution\": \"#ffcc00\", \"none\": \"#33ccff\"}\n    for res in results:\n        mmsi = res[\"mmsi\"]\n        rng = res[\"range_nm\"]\n        brg = math.radians(res[\"bearing_deg\"])\n        px = cx + rng * math.sin(brg) * scale\n        py = cy - rng * math.cos(brg) * scale\n        col = colors.get(res[\"level\"], \"#33ccff\")\n        parts.append(\n            '<circle id=\"target-%s\" cx=\"%.1f\" cy=\"%.1f\" r=\"5\" '\n            'fill=\"%s\"/>' % (mmsi, px, py, col)\n        )\n\n    parts.append(\"</svg>\")\n    return \"\\n\".join(parts)\n\n\ndef main():\n    if len(sys.argv) < 3:\n        print(\"usage: python solve.py input.json answer.json\", file=sys.stderr)\n        return 1\n    in_path = sys.argv[1]\n    out_path = sys.argv[2]\n\n    with open(in_path, \"r\") as f:\n        data = json.load(f)\n\n    own = data[\"own\"]\n    targets = data.get(\"targets\", [])\n    danger = float(data[\"cpa_danger_nm\"])\n    caution = float(data[\"cpa_caution_nm\"])\n    tcpa_max = float(data[\"tcpa_max_min\"])\n\n    skipped = []\n    results = []\n    for t in targets:\n        if not valid_target(t):\n            skipped.append(t.get(\"mmsi\"))\n            continue\n        rng, bearing, cpa, tcpa_min = compute(own, t)\n        lvl = level_for(cpa, tcpa_min, danger, caution, tcpa_max)\n        results.append({\n            \"mmsi\": t[\"mmsi\"],\n            \"range_nm\": round(rng, 3),\n            \"bearing_deg\": round(bearing, 1),\n            \"cpa_nm\": round(cpa, 3),\n            \"tcpa_min\": round(tcpa_min, 2),\n            \"level\": lvl,\n        })\n\n    skipped.sort()\n\n    danger_list = [r for r in results if r[\"level\"] == \"danger\"]\n    caution_list = [r for r in results if r[\"level\"] == \"caution\"]\n    danger_list.sort(key=lambda r: (r[\"tcpa_min\"], r[\"mmsi\"]))\n    caution_list.sort(key=lambda r: (r[\"tcpa_min\"], r[\"mmsi\"]))\n    alerts = [r[\"mmsi\"] for r in danger_list] + [r[\"mmsi\"] for r in caution_list]\n\n    answer = {\n        \"targets\": results,\n        \"skipped\": skipped,\n        \"alerts\": alerts,\n    }\n\n    with open(out_path, \"w\") as f:\n        json.dump(answer, f, indent=1)\n\n    svg = make_svg(own, results)\n    with open(\"radar.svg\", \"w\") as f:\n        f.write(svg)\n\n    return 0\n\n\nif __name__ == \"__main__\":\n    sys.exit(main())\n"
    },
    "result": "wrote 5248 chars"
   },
   {
    "turn": 3,
    "response": {
     "id": "chatcmpl-2b0c7475",
     "choices": [
      {
       "index": 0,
       "message": {
        "content": null,
        "tool_calls": [
         {
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          "function": {
           "name": "run_shell",
           "arguments": "{\"command\":\"cd . && python3 solve.py input.json answer.json && cat answer.json && echo \\\"---\\\" && head -c 400 radar.svg\"}"
          }
         }
        ],
        "role": "assistant"
       },
       "finish_reason": "tool_calls",
       "logprobs": null,
       "raw_output": null
      }
     ],
     "created": 1793060805,
     "model": "deepseek-v4-1-flash",
     "service_tier": null,
     "object": "chat.completion",
     "usage": {
      "prompt_tokens": 3927,
      "completion_tokens": 67,
      "total_tokens": 3994,
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      "cache_read_input_tokens": 1920,
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       "accepted_prediction_tokens": null,
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     },
     "cost": {
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      "diem": 0.0006969000000000001
     },
     "venice_parameters": {
      "strip_thinking_response": false,
      "disable_thinking": false,
      "enable_e2ee": true,
      "enable_web_search": "off",
      "enable_web_scraping": false,
      "enable_web_citations": false,
      "include_search_results_in_stream": false,
      "include_venice_system_prompt": false,
      "enable_x_search": false,
      "web_search_citations": [],
      "return_search_results_as_documents": false
     }
    }
   },
   {
    "turn": 3,
    "tool": "run_shell",
    "args": {
     "command": "cd . && python3 solve.py input.json answer.json && cat answer.json && echo \"---\" && head -c 400 radar.svg"
    },
    "result": "exit=0\nstdout:\n{\n \"targets\": [\n  {\n   \"mmsi\": 795070736,\n   \"range_nm\": 7.981,\n   \"bearing_deg\": 202.0,\n   \"cpa_nm\": 0.309,\n   \"tcpa_min\": 11.82,\n   \"level\": \"danger\"\n  },\n  {\n   \"mmsi\": 276139249,\n   \"range_nm\": 5.193,\n   \"bearing_deg\": 355.7,\n   \"cpa_nm\": 5.192,\n   \"tcpa_min\": 0.17,\n   \"level\": \"none\"\n  },\n  {\n   \"mmsi\": 265918776,\n   \"range_nm\": 7.18,\n   \"bearing_deg\": 293.1,\n   \"cpa_nm\": 0.66,\n   \"tcpa_min\": 6.2,\n   \"level\": \"caution\"\n  },\n  {\n   \"mmsi\": 743277030,\n   \"range_nm\": 5.986,\n   \"bearing_deg\": 85.4,\n   \"cpa_nm\": 0.318,\n   \"tcpa_min\": 32.02,\n   \"level\": \"none\"\n  },\n  {\n   \"mmsi\": 562375419,\n   \"range_nm\": 3.312,\n   \"bearing_deg\": 105.8,\n   \"cpa_nm\": 0.724,\n   \"tcpa_min\": 25.19,\n   \"level\": \"caution\"\n  },\n  {\n   \"mmsi\": 613463677,\n   \"range_nm\": 6.126,\n   \"bearing_deg\": 359.0,\n   \"cpa_nm\": 0.013,\n   \"tcpa_min\": 13.23,\n   \"level\": \"danger\"\n  },\n  {\n   \"mmsi\": 286629533,\n   \"range_nm\": 3.941,\n   \"bearing_deg\": 316.4,\n   \"cpa_nm\": 1.245,\n   \"tcpa_min\": 53.42,\n   \"level\": \"none\"\n  },\n  {\n   \"mmsi\": 637679438,\n   \"range_nm\": 5.672,\n   \"bearing_deg\": 124.2,\n   \"cpa_nm\": 5.672,\n   \"tcpa_min\": 0.0,\n   \"level\": \"none\"\n  },\n  {\n   \"mmsi\": 327721356,\n   \"range_nm\": 4.489,\n   \"bearing_deg\": 138.5,\n   \"cpa_nm\": 4.489,\n   \"tcpa_min\": 0.0,\n   \"level\": \"none\"\n  },\n  {\n   \"mmsi\": 777617410,\n   \"range_nm\": 7.368,\n   \"bearing_deg\": 162.4,\n   \"cpa_nm\": 4.584,\n   \"tcpa_min\": 50.26,\n   \"level\": \"none\"\n  }\n ],\n \"skipped\": [\n  340778672,\n  660159254\n ],\n \"alerts\": [\n  795070736,\n  613463677,\n  265918776,\n  562375419\n ]\n}---\n<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"600\" height=\"600\" viewBox=\"0 0 600 600\">\n<rect width=\"600\" height=\"600\" fill=\"#0b1a0b\"/>\n<circle cx=\"300.0\" cy=\"300.0\" r=\"67.5\" fill=\"none\" stroke=\"#1f5f1f\" stroke-width=\"1\"/>\n<circle cx=\"300.0\" cy=\"300.0\" r=\"135.0\" fill=\"none\" stroke=\"#1f5f1f\" stroke-width=\"1\"/>\n<circle cx=\"300.0\" cy=\"300.0\" r=\"202.5\" fill=\"none\" stroke=\"#1f5f1f\" stroke-width=\"1\"/>\n<\nstderr:\n"
   },
   {
    "turn": 4,
    "response": {
     "id": "chatcmpl-e61965d6",
     "choices": [
      {
       "index": 0,
       "message": {
        "content": null,
        "tool_calls": [
         {
          "index": 0,
          "id": "call_b0ea561c00d44a88957e9805",
          "type": "function",
          "function": {
           "name": "run_shell",
           "arguments": "{\"command\":\"cd . && python3 -c \\\"\\nimport xml.dom.minidom,re\\ns=open('radar.svg').read()\\nd=xml.dom.minidom.parseString(s)\\nids=[e.getAttribute('id') for e in d.getElementsByTagName('*') if e.getAttribute('id')]\\nprint('ids:',ids)\\nprint('script' in s.lower(), 'http' in s.lower(), '<image' in s.lower(), '<a ' in s.lower())\\n\\\"\"}"
          }
         }
        ],
        "role": "assistant",
        "reasoning_content": "Let me verify the logic. Target 660159254 has sog 102.3 \u2192 skipped. 340778672 cog 360 \u2192 skipped. Good.\n\nLet me double check the \"none\" targets with tcpa 0.0 \u2014 those are targets moving away (TCPA clamped to 0). Fine.\n\nLet me verify the SVG has all target ids and own-ship. Also check no scripts/links. Good.\n\nLet me verify a couple computations manually. Target 795070736: lat 46.83549, lon -127.20639. own lat 46.95882, lon -127.13341.\n\nx = (-127.20639 - (-127.13341)) * 60 * cos(46.95882) = (-0.07298)*60*cos(46.95882). cos(46.95882\u00b0)=0.6826. = -4.3788*0.6826 = -2.989. y = (46.83549-46.95882)*60 = -0.12333*60 = -7.3998. range = sqrt(2.989^2+7.3998^2)=sqrt(8.934+54.76)=sqrt(63.69)=7.98. Good.\n\nBearing atan2(x,y)=atan2(-2.989,-7.3998). That's in third quadrant \u2192 180+atan(2.989/7.3998)=180+22.0=202.0. Good.\n\nEverything looks consistent. Let me verify the SVG validity with a quick parse and check ids."
       },
       "finish_reason": "tool_calls",
       "logprobs": null,
       "raw_output": null
      }
     ],
     "created": 1793060806,
     "model": "deepseek-v4-1-flash",
     "service_tier": null,
     "object": "chat.completion",
     "usage": {
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       "accepted_prediction_tokens": null,
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      }
     },
     "cost": {
      "usd": 0,
      "diem": 0.0014889
     },
     "venice_parameters": {
      "strip_thinking_response": false,
      "disable_thinking": false,
      "enable_e2ee": true,
      "enable_web_search": "off",
      "enable_web_scraping": false,
      "enable_web_citations": false,
      "include_search_results_in_stream": false,
      "include_venice_system_prompt": false,
      "enable_x_search": false,
      "web_search_citations": [],
      "return_search_results_as_documents": false
     }
    }
   },
   {
    "turn": 4,
    "tool": "run_shell",
    "args": {
     "command": "cd . && python3 -c \"\nimport xml.dom.minidom,re\ns=open('radar.svg').read()\nd=xml.dom.minidom.parseString(s)\nids=[e.getAttribute('id') for e in d.getElementsByTagName('*') if e.getAttribute('id')]\nprint('ids:',ids)\nprint('script' in s.lower(), 'http' in s.lower(), '<image' in s.lower(), '<a ' in s.lower())\n\""
    },
    "result": "exit=0\nstdout:\nids: ['own-ship', 'target-795070736', 'target-276139249', 'target-265918776', 'target-743277030', 'target-562375419', 'target-613463677', 'target-286629533', 'target-637679438', 'target-327721356', 'target-777617410']\nFalse True False False\n\nstderr:\n"
   },
   {
    "turn": 5,
    "response": {
     "id": "chatcmpl-f48fda5c",
     "choices": [
      {
       "index": 0,
       "message": {
        "content": null,
        "tool_calls": [
         {
          "index": 0,
          "id": "call_d706012d4cd649b380ae136c",
          "type": "function",
          "function": {
           "name": "run_shell",
           "arguments": "{\"command\":\"cd . && cat > /tmp/in2.json <<'EOF'\\n{\\\"own\\\":{\\\"lat\\\":0,\\\"lon\\\":0,\\\"cog\\\":0,\\\"sog\\\":10},\\n\\\"targets\\\":[{\\\"mmsi\\\":1,\\\"lat\\\":0.1,\\\"lon\\\":0,\\\"cog\\\":180,\\\"sog\\\":10},\\n{\\\"mmsi\\\":2,\\\"lat\\\":null,\\\"lon\\\":0,\\\"cog\\\":0,\\\"sog\\\":5},\\n{\\\"mmsi\\\":3,\\\"lat\\\":0.2,\\\"lon\\\":0.2,\\\"cog\\\":0,\\\"sog\\\":0}],\\n\\\"cpa_danger_nm\\\":0.5,\\\"cpa_caution_nm\\\":1.0,\\\"tcpa_max_min\\\":30}\\nEOF\\npython3 solve.py /tmp/in2.json /tmp/out2.json && cat /tmp/out2.json\"}"
          }
         }
        ],
        "role": "assistant",
        "reasoning_content": "The \"http\" appears in xmlns=\"http://www.w3.org/2000/svg\" which is fine (namespace, not external asset). That's required for SVG. Good.\n\nLet me verify the skipped logic: 660159254 has sog 102.3 \u2192 skipped. 340778672 cog 360 \u2192 skipped. Correct.\n\nEverything looks good. Let me double check the \"http\" concern \u2014 the static rules say no external assets. The xmlns namespace URI is standard and not fetched. Fine.\n\nLet me verify a fresh run works with a different input to be safe."
       },
       "finish_reason": "tool_calls",
       "logprobs": null,
       "raw_output": null
      }
     ],
     "created": 1793060810,
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     "venice_parameters": {
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      "enable_e2ee": true,
      "enable_web_search": "off",
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   },
   {
    "turn": 5,
    "tool": "run_shell",
    "args": {
     "command": "cd . && cat > /tmp/in2.json <<'EOF'\n{\"own\":{\"lat\":0,\"lon\":0,\"cog\":0,\"sog\":10},\n\"targets\":[{\"mmsi\":1,\"lat\":0.1,\"lon\":0,\"cog\":180,\"sog\":10},\n{\"mmsi\":2,\"lat\":null,\"lon\":0,\"cog\":0,\"sog\":5},\n{\"mmsi\":3,\"lat\":0.2,\"lon\":0.2,\"cog\":0,\"sog\":0}],\n\"cpa_danger_nm\":0.5,\"cpa_caution_nm\":1.0,\"tcpa_max_min\":30}\nEOF\npython3 solve.py /tmp/in2.json /tmp/out2.json && cat /tmp/out2.json"
    },
    "result": "exit=0\nstdout:\n{\n \"targets\": [\n  {\n   \"mmsi\": 1,\n   \"range_nm\": 6.0,\n   \"bearing_deg\": 0.0,\n   \"cpa_nm\": 0.0,\n   \"tcpa_min\": 18.0,\n   \"level\": \"danger\"\n  },\n  {\n   \"mmsi\": 3,\n   \"range_nm\": 16.971,\n   \"bearing_deg\": 45.0,\n   \"cpa_nm\": 12.0,\n   \"tcpa_min\": 72.0,\n   \"level\": \"none\"\n  }\n ],\n \"skipped\": [\n  2\n ],\n \"alerts\": [\n  1\n ]\n}\nstderr:\n"
   },
   {
    "turn": 6,
    "response": {
     "id": "chatcmpl-3a45f8c9",
     "choices": [
      {
       "index": 0,
       "message": {
        "content": "All checks pass. Summary:\n\n**`solve.py`** (Python 3 stdlib only) implements the spec:\n\n- **Filtering**: skips targets with missing/null `lat`/`lon`/`cog`/`sog`, `sog >= 102.3`, or `cog >= 360`; skipped MMSIs sorted ascending, valid targets kept in input order.\n- **Geometry**: local flat nm frame (`x = \u0394lon\u00b760\u00b7cos(lat)`, `y = \u0394lat\u00b760`), velocity `(sog\u00b7sin(cog), sog\u00b7cos(cog))`, relative `r`/`v`, `TCPA = max(0, -(r\u00b7v)/|v|\u00b2)` (0 if `|v|\u00b2 < 1e-9`), `CPA = |r + v\u00b7TCPA|`, plus `range_nm`, `bearing_deg = atan2(x,y) mod 360`, `tcpa_min = TCPA\u00b760`.\n- **Levels/alerts**: `danger`/`caution`/`none` by CPA and TCPA thresholds; alerts list danger then caution, each sorted by `tcpa_min` then `mmsi`.\n- **Rounding**: range/CPA 3 dp, bearing 1 dp, tcpa_min 2 dp.\n- **`radar.svg`**: static self-contained SVG (root `<svg>`, no scripts/images/links/external assets) with `id=\"own-ship\"` and `id=\"target-<mmsi>\"` for every non-skipped target.\n\nVerified on the provided input (2 skipped: `340778672` cog=360, `660159254` sog=102.3; alerts `[795070736, 613463677, 265918776, 562375419]`) and on a synthetic edge-case input (null field, zero-speed target, head-on collision). SVG parses as valid XML with all required IDs.",
        "role": "assistant",
        "reasoning_content": "Wait, target 3: sog 0, own sog 10 cog 0. r=(0.2*60, 0.2*60)=(12,12). v = (0,0)-(0,10)=(0,-10). r.v = 12*0+12*(-10)=-120. |v|^2=100. tcpa=1.2h=72min. cpa = |r+v*tcpa| = |(12, 12-12)|=(12,0)=12. Correct.\n\nEverything works. The \"http\" match was from xmlns namespace which is fine (not an external asset). Let me verify no external references \u2014 xmlns is required for SVG. Good.\n\nDone."
       },
       "finish_reason": "stop",
       "logprobs": null,
       "raw_output": null
      }
     ],
     "created": 1793060812,
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     "venice_parameters": {
      "strip_thinking_response": false,
      "disable_thinking": false,
      "enable_e2ee": true,
      "enable_web_search": "off",
      "enable_web_scraping": false,
      "enable_web_citations": false,
      "include_search_results_in_stream": false,
      "include_venice_system_prompt": false,
      "enable_x_search": false,
      "web_search_citations": [],
      "return_search_results_as_documents": false
     }
    }
   }
  ]
 }
]