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Binance exchange: Spot REST+WS APIs, symbol conventions, rate limits, taker volume, geo-blocking. Use when: Binance connector issues, REST Klines for HOLS, WS trade data, symbol resolution, API rate planning. <example>How do I get taker buy volume from Binance Klines?</example> <example>What is the WS endpoint accessible from US IPs?</example>

Kalshi exchange domain knowledge: API structure, product types, fee schedules, market mechanics, regulatory context. Use when: Kalshi API integration questions, understanding Kalshi market mechanics, fee calculation and optimization, order placement strategy, market lifecycle handling, product category analysis, regulatory or compliance considerations, demo vs production environment differences. <example>What is the taker fee for a 50-cent Kalshi contract?</example> <example>How does Kalshi market lifecycle work from active to settled?</example>

Kraken exchange domain knowledge: Spot WS v2 (ord_type, trade data) and Futures WS v1 (perpetuals, funding rates). Use when: Kraken connector issues, funding rate analysis, perpetual/spot contract mechanics, WebSocket message parsing, product symbol resolution, Spot trade data for marketorder_volume. <example>How does Kraken Futures funding rate work for PF_XBTUSD?</example> <example>What is the WebSocket message format for Kraken ticker updates?</example> <example>Does Kraken Spot WS include ord_type on trade messages?</example>

Polymarket exchange domain knowledge: CLOB API, condition/token model, Gamma REST API, sharding, market discovery, UMA resolution. Use when: Polymarket connector issues, market discovery and filtering, token subscription management, Gamma API pagination, condition/token data model, resolution oracle mechanics, category/tag filtering. <example>How does Polymarket's condition/token model work for multi-outcome events?</example> <example>What is the Gamma API pagination pattern for market discovery?</example>

Exchange symbology and identifier conventions: Kalshi tickers, Kraken pairs, Polymarket tokens. Use when: ticker parsing, cross-exchange identifier mapping, understanding ID formats, trade matching by symbol, XBT/BTC normalization, condition_id vs token_id disambiguation, cross-exchange price unit conversion, pair_id anatomy. <example>How do I map a Kalshi KXBTCD ticker to its Kraken PF_XBTUSD equivalent?</example> <example>What is the difference between Polymarket condition_id and token_id?</example>