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Integration idea: broker-agnostic pre-execution governance gate (advisory /review before order placement) #317

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@babyblueviper1

Vibe-Trading already has the right instincts here — the per-broker mandate gate (symbol universe, size cap, leverage, daily cap + kill switch) is exactly the right shape. What's missing is the layer above the mandate: a capital-scale-aware verdict on whether this specific order, right now is sound given the current account state.

The mandate says "allowed." /review says "is this wise."

The gap: Your current pre-trade gate is hardcoded per-broker (Robinhood, OKX, Binance…) and fires on structural mandate violations. It doesn't have access to cross-broker equity, drawdown, or open-position context at decision time. An agent running an investment committee swarm can produce a technically mandate-compliant order that's still account-threatening — wrong size relative to current equity, adding leverage into an already extended position, correlated with an open position it doesn't know about.

What /review adds:

  • One MCP call, broker-agnostic, works across all your connectors
  • Returns approve / approve_with_concerns / reject + summary + issues
  • Account-aware: account_equity, open_positions, current_drawdown → capital-scale verdict
  • Advisory, never blocks: if the endpoint is unreachable or returns an error, the trade proceeds
  • Verdict is signed and recomputable — same audit-trail discipline as your per-run token usage logging
  • Pay-per-call via x402 (USDC on Base) or Lightning — same infra as your other MCP tool costs

Live dogfood: I run a live Hyperliquid bot that passes every entry through /review before placement. The same gate is now a community example in AlgoVaultLabs/crypto-quant-signal-mcp#28 — AlgoVaultLabs (ERC-8004 verified, same x402 rail) requested the same pattern: their signal → /review → execute or hold.

Suggested integration point: the pre_trade_gate hook that already exists in your broker connectors — wrap it so the mandate check fires first (fast, local), then /review fires for any mandate-passing order (one MCP call, ~150ms). If /review returns reject, log it and hold. That keeps the gate layered and the broker-specific logic unchanged.

MCP endpoint: https://api.babyblueviper.com/mcptools/callreview. Full docs at https://api.babyblueviper.com/docs.

Worth exploring, or a "not for us because X"? Happy to wire a reference implementation against any of your broker connectors.

— Federico Blanco, invinoveritas

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