curl --request GET \
  --url https://api.simmer.markets/api/sdk/briefing

{
  "venues": {
    "sim": {
      "currency": "<string>",
      "balance": 123,
      "pnl": 0,
      "realized_pnl": 123,
      "unrealized_pnl": 123,
      "positions_count": 0,
      "positions_needing_attention": [],
      "actions": []
    },
    "polymarket": {
      "currency": "<string>",
      "balance": 123,
      "pnl": 0,
      "realized_pnl": 123,
      "unrealized_pnl": 123,
      "positions_count": 0,
      "positions_needing_attention": [],
      "actions": []
    },
    "kalshi": {
      "currency": "<string>",
      "balance": 123,
      "pnl": 0,
      "realized_pnl": 123,
      "unrealized_pnl": 123,
      "positions_count": 0,
      "positions_needing_attention": [],
      "actions": []
    }
  },
  "opportunities": {},
  "performance": {
    "total_pnl": 0,
    "pnl_percent": 0
  },
  "checked_at": "<string>",
  "risk_alerts": [],
  "triggered_risk_alerts": [
    "<unknown>"
  ],
  "risk_warnings": [],
  "sdk_update": {},
  "skill_updates": [
    "<unknown>"
  ]
}