Spec drift: gemini-titan — new positions@account@1s WebSocket stream not handled

[realfishsam]

Summary

Gemini Titan added a new WebSocket subscription stream positions@account@1s that pushes real-time position updates at 1-second intervals. The PMXT Gemini Titan WebSocket handler does not subscribe to or process this stream.

Impact

MEDIUM — PMXT cannot receive real-time position updates from Gemini Titan via WebSocket. Position state must be polled via REST instead, introducing latency.

Details

• Stream name: positions@account@1s
• Authentication required: yes (account-level stream)
• Message format: array of position objects with symbol, size, entryPrice, markPrice, unrealizedPnl, liquidationPrice
• Current Gemini Titan WebSocket handler: core/src/exchanges/gemini-titan/websocket.ts — does not subscribe to this stream
• Update frequency: once per second per subscribed symbol set

Required Fix

1. Add subscription logic for positions@account@1s in the Gemini Titan WebSocket handler
2. Parse incoming position messages and map them to PMXT's unified position schema
3. Wire up the stream so position state is updated in real-time rather than requiring REST polling