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Consolidate the cross-cutting data tools onto the unified interface and remove their per-exchange duplicates. - /mcp/tools/get_historical: single call, `exchange` now optional. Set → that venue's candles (native symbol); omitted → cross-exchange consensus (canonical symbol, median OHLC + div_pct). Folds in the former /mcp-cross consensus, whose router is deleted. - /mcp/tools/get_indicators: new common tool computing sma/rsi/atr/macd/adx over the single-or-consensus series. Computation centralized in common/indicators.py::compute_indicators (was duplicated per exchange). - Remove get_historical from /mcp-deribit and /mcp-hyperliquid; remove get_technical_indicators (deribit) and get_indicators (hyperliquid), including the now-dead client methods, Req schemas and tool wrappers. The client get_historical METHODS stay (used by the unified dispatch). Tests: rewrite cross tests into test_unified (instruments, historical single + consensus + failures, indicators single + consensus); drop the old CrossClient test; tighten app-boot surface assertions (/mcp owns the data tools; no /mcp-cross, no per-exchange historical/indicators). Docs: API_REFERENCE / README / CLAUDE updated; smoke run_unified.sh now covers consensus + indicators. 324 passed, ruff clean. Verified live against Deribit/Hyperliquid. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>