NautilusTrader 1.225.0 Beta

Released on 6th April 2026 (UTC).

Enhancements

• Added option chains and greeks in Rust (#3637), thanks @filipmacek
• Added option chains and greeks in Python (#3677), thanks @filipmacek
• Added cached futures-spread support to GreeksCalculator (#3792), thanks @faysou
• Added custom data registration, persistence, and routing in Rust (#3542), thanks @faysou
• Added nautilus_actor! macro in nautilus_common for Deref/DerefMut boilerplate on actor types (Rust)
• Added nautilus_strategy! macro in nautilus_trading for Deref/DerefMut and Strategy trait boilerplate on strategy types, with optional block for hook overrides (Rust)
• Added cache.orders_active_local(...) function in Rust (#3716), thanks @Javdu10
• Added interval field to FundingRateUpdate (#3694), thanks @dxwil
• Added BookImbalanceActor example actor for order book quoted volume imbalance in Rust
• Added ExecTesterConfig.test_reject_post_only implicitly setting post_only on orders without requiring use_post_only (Python and Rust)
• Added TieredTickScheme and TickScheme::Tiered for price-dependent tick sizes (Rust)
• Added TokenizedAsset instrument type with configurable asset_class field for tokenized equities, ETFs, commodities, and other real-world assets
• Added Betfair backtest example streaming raw .gz data through BacktestEngine (Rust)
• Added Binance decode_binance_spot_client_order_id and decode_binance_futures_client_order_id utility functions for decoding Link & Trade encoded clientOrderId values from raw Binance API responses
• Added Binance Futures subscribe_funding_rates and unsubscribe_funding_rates with FundingRateUpdate emission via the mark price stream (Rust)
• Added Binance Futures exchange-generated order handling for liquidation, ADL, and settlement fills with client order ID prefix detection and FillReport/OrderStatusReport emission (Rust)
• Added Binance Futures use_position_ids config for hedging position IDs derived from instrument and position side on exchange-generated fills (Rust)
• Added Binance Futures default_taker_fee config with commission fallback estimation for exchange-generated fills when venue omits commission fields (Rust, USD-M only)
• Added Binance NewAdl, NewInsurance, and PendingNew variants to BinanceOrderStatus (Rust)
• Added Binance Rpi time-in-force, PreSettle/Settling/Close contract statuses, None/Decrement/Transfer STP modes, and income type variants (Rust)
• Added Binance instrument status polling in Rust
• Added Arrow schema support for BinanceBar and BinanceFuturesMarkPriceUpdate (#3749), thanks @twitu
• Added Binance Futures close_position parameter for algo stop orders to close an entire position at trigger price (Python and Rust) (#3751), thanks for reporting @dodge-basic
• Added Bybit native TP/SL params for order placement (#3754), thanks @jindrichsirucek
• Added Bybit instrument status polling and subscription (#3738), thanks @filipmacek
• Added Bybit options trade subscriptions using baseCoin topic with per-instrument filtering
• Added Bybit option instrument fee rate population from /v5/account/fee-rate
• Added Bybit submit_order_list via WebSocket batch API with TP/SL support and HTTP demo fallback (Rust)
• Added Bybit query_order via HTTP with open order and history fallback (Rust)
• Added Databento Arrow serialization for imbalance and statistics (#3689), thanks for reporting @GianC0
• Added Deribit LimitIfTouched and MarketIfTouched order type support (take_limit/take_market)
• Added Hyperliquid agent wallet support (#3668), thanks @oh92
• Added Hyperliquid product type config for live clients (#3783), thanks @lisiyuan656
• Added Kraken FOK, LimitIfTouched orders, and batch submit
• Added Kraken tokenized equity (xStocks) support via aclass_base=tokenized_asset with automatic dual-fetch on instrument loading (#3455), thanks for reporting @jilongjia
• Added Kraken request_book_snapshot for spot and futures via HTTP depth endpoints
• Added Kraken request_funding_rates for futures with client-side start/end/limit filtering
• Added Kraken subscribe_instrument_status for spot and futures (polling-based detection)
• Added Kraken spot trailing stop and trailing stop limit order submission with trailing_offset and limit_offset fields
• Added Kraken spot trigger parameter for conditional orders (last or index price reference)
• Added Kraken spot quote quantity orders via viqc order flag
• Added Kraken spot iceberg orders via displayvol parameter
• Added OKX submit_order_list via WebSocket batch endpoint for regular GTC orders
• Added OKX support for bracket order submission with attached TP/SL (#3701), thanks @Nickonomic
• Added OKX subscribe_option_greeks for venue-provided Greeks via the opt-summary WebSocket channel
• Added OKX configurable ws_auth_timeout_secs for WebSocket authentication (#3727), thanks for reporting @Stamppot82
• Added OKX fwdPx (forward price) to OKXOptionSummaryMsg and mapped to underlying_price on OptionGreeks for ATM tracking
• Added OKX request_orderbook_snapshot and request_funding_rates to Python data client via PyO3 bindings
• Added OKX options trading execution with limit orders, px_usd/px_vol pricing modes, OpFok order type, and MarketToLimit/conditional order rejection
• Added OKX options position-level Black-Scholes Greeks (delta_bs, gamma_bs, theta_bs, vega_bs) to position data
• Added OKX determine_order_type_with_alt for correct order type classification when options use alternative pricing fields
• Added DeltaNeutralVol strategy strangle entry via px_vol limit orders with configurable IV offset, time-in-force, and cache-based re-entry guard
• Added OKX missing WebSocket message fields across all channel structs
• Added Polymarket instrument provider and filters in Rust (#3708), thanks @filipmacek
• Added Polymarket strategy-driven data subscriptions (#3806), thanks @Javdu10
• Added Tardis MarkPriceUpdate and IndexPriceUpdate parsing from derivative_ticker messages in Rust
• Added Tardis DerivativeTickerCache for deduplicating unchanged funding rate, mark price, and index price updates
• Added Tardis TardisDataType enum for normalized Tardis Machine data type identifiers
• Added Tardis live streaming support via stream_options config with automatic reconnection and exponential backoff
• Added Tardis raw provider metadata to Instrument.info (#3730), thanks for reporting @volemont

Breaking Changes

• Removed deprecated convert_quote_qty_to_base from ExecEngineConfig and LiveExecEngineConfig; adapters now handle quote-to-base conversion directly
• Removed TARDIS_BASE_URL constant from nautilus_tardis::http - use nautilus_tardis::common::urls::TARDIS_HTTP_BASE_URL
• Removed Hyperliquid revoke_hyperliquid_builder_fee function and builder fee revoke scripts
• Removed DatabentoLiveClient.key property (Python)
• Renamed OrderEvent.kind() to type_name() in Rust
• Renamed instrument type_str PyO3 getter to type_name
• Renamed DatabentoHistoricalClient.key property to api_key (Python)
• Renamed ParquetDataCatalogV2 to ParquetDataCatalog and StreamingFeatherWriterV2 to StreamingFeatherWriter (PyO3 persistence classes)
• Changed Tardis HTTP client from reqwest::Client to nautilus_network::http::HttpClient with rate limiting
• Changed ExecutionEngine.register_client to error when a venue is already routed to another client (Rust)
• Changed ExecutionEngine.register_venue_routing to error when re-routing a venue to a different client (Rust)
• Changed collection-cloning PyO3 getters to methods: Position.events(), adjustments(), client_order_ids(), venue_order_ids(), trade_ids(); and events() on all order types
• Changed config structs to use bon::Builder defaults as single source of truth; Default impls now delegate to Self::builder().build()
• Changed config fields that always had a sensible default from Option<T> to plain T with #[builder(default)] across all adapter, live, and engine configs (Rust)
• Changed Option<T> fields retained only where None carries distinct meaning (feature disabled, unbounded, etc.)

Security

• Hardened Docker Compose to bind all ports to localhost and add no-new-privileges to all services
• Hardened CI egress policy to block by default and fall back to audit mode for fork pull requests
• Upgraded all nautilustrader.io URLs from HTTP to HTTPS (#3686), thanks @04cb
• Documented aws-lc-rs non-FIPS mode rationale (FIPS 140-3 module requires Go toolchain)

Fixes

• Fixed OrderBook L1 stale event mutation corrupting bid/ask (#3790), thanks for reporting @linimin
• Fixed position index blob pollution in update_position (#3791), thanks @YeeTsai
• Fixed purge_order KeyError for position/exec_algorithm index access (#3799)
• Fixed strategy receiving historical events during startup reconciliation (#3793), thanks @filipmacek
• Fixed Trader::add_exec_algorithm not registering the {id}.execute msgbus endpoint, causing orders with exec_algorithm_id to be silently dropped
• Fixed Trader::clear_exec_algorithms and dispose_components not deregistering {id}.execute msgbus endpoints for removed algorithms
• Fixed TopicRouter stale index cache panic when unsubscribing one pattern invalidated indices for unrelated cached topics (#3755), thanks for reporting @Javdu10
• Fixed PRICE_UNDEF panic in OrderBookDelta.to_pyo3_list Cython conversion (#3697), thanks @zshuang15
• Fixed ExecutionEngine silently dropping SubmitOrder and SubmitOrderList commands when no execution client can be resolved; now emits OrderDenied (Rust)
• Fixed RiskEngine RefCell re-entrancy panic on order denial (#3680), thanks @husariancom
• Fixed reconciliation when trigger_price is set for non-conditional orders (#3673), thanks @husariancom
• Fixed subscribe_instruments using exact topic instead of wildcard pattern, causing venue-level subscriptions to miss per-instrument publishes from DataEngine (Rust)
• Fixed spurious "Timer replaced" warnings for expired timers in LiveClock and TestClock (#3690), thanks @HaakonFlaaronning
• Fixed time bar historical event deferral (#3698), thanks @faysou
• Fixed DataActor and Strategy timer callbacks in live mode silently lost on shared clock
• Fixed DataActor::handle_time_event missing not_running() state guard
• Fixed SimulatedExchange account balance adjustment mutation (#3704), thanks for reporting @thaning0
• Fixed analyzer and tearsheet returns to prefer portfolio-level daily returns when they can be derived from account balances
• Fixed backtest analyzer to include position snapshots in Rust (#3710), thanks @necofx
• Fixed make_dict_serializer incompatible with instance-method to_dict for @customdataclass types (#3722), thanks for reporting @Lacleman-trading
• Fixed Sandbox RefCell re-entrancy panic when submitting orders through ExecutionEngine in async runner (#3732), thanks for reporting @linimin
• Fixed triggered stop orders remaining in matching core after full fill, causing repeated duplicate fill log messages (#3741), thanks for reporting @linimin
• Fixed matching engine L1_MBP stale bid/ask when backtesting with trade-only data (Rust and Cython)
• Fixed matching engine GTD order expiry running after fills, allowing expired orders to fill before being expired
• Fixed Order::calculate_overfill emitting false Quantity saturation warnings during normal partial fills (#3746), thanks for reporting @linimin
• Fixed Sandbox reconciliation missing account_id (#3705), thanks for reporting @eliotOrderson
• Fixed Rust Portfolio account-scoped net_exposure, net_exposures, and balance updates in multi-account mode
• Fixed RefCell borrow conflict in Portfolio::initialize_orders (#3787), thanks @filipmacek
• Fixed reported MarginAccount updates dropping initial and maintenance margins (#3725), thanks for reporting @marco-rigoni
• Fixed option chains emitting data after expiry (#3735), thanks @filipmacek
• Fixed BettingInstrument.selection_handicap PyO3 name
• Fixed adapter query_account panic from block_on inside async runtime across all adapters (Rust)
• Fixed Betfair order modify Quantity serialization for partial cancel size reduction
• Fixed Binance trailing stop params and testnet URLs (#3778), thanks @eliotOrderson
• Fixed Binance Spot SBE schema version mismatch after Binance upgraded to schema 3:3 (released 2026-03-25)
• Fixed Binance algo order update (#3665), thanks @qu1zzyboy
• Fixed Binance SBE price/quantity precision derivation (#3670), thanks @husariancom
• Fixed Binance Futures set_futures_hedge_mode sending GET instead of POST to positionSide/dual endpoint (#3745), thanks for reporting @dodge-basic
• Fixed Binance order update silently dropped when instrument not cached (#3775), thanks for reporting @M-at-ti-a
• Fixed Binance Futures OrderStatusReport missing avg_px from WS order updates (Python)
• Fixed Binance Spot post-only (LIMIT_MAKER) rejection not setting due_post_only on OrderRejected events (Python and Rust)
• Fixed Binance Rust WS trading API not decoding SBE error responses, losing error codes on rejection
• Fixed Binance Rust WS trading request-response race condition where fast rejections arrived before pending request registration
• Fixed Binance Rust WS trading OrderRejected DashMap deadlock when cleanup_terminal ran while holding a read guard
• Fixed Binance Spot Rust connect() not waiting for WS session authentication before signaling connected
• Fixed Binance Futures account state parsing failing on empty string balances from inactive accounts
• Fixed Bybit demo exec client failing with error 10001 when /v5/account/fee-rate is unavailable (#3742), thanks for reporting @jindrichsirucek
• Fixed Bybit HTTP client not retrying on 429 rate limit responses
• Fixed Bybit HTTP cancellation token not resettable after disconnect(), causing REST calls to short-circuit on reconnect
• Fixed Bybit WebSocket subscription ACKs confirming all pending topics instead of the acknowledged topic (via req_id correlation)
• Fixed Bybit WebSocket failed subscription ACKs (success=false) not triggering mark_failure recovery path
• Fixed Bybit spot market orders ignoring is_quote_quantity on the order, causing all spot market buys to default to quote currency quantity via the Bybit API
• Fixed Bybit demo mode submit_order ignoring is_leverage param, hardcoding false instead of reading from order params
• Fixed Bybit trigger_type ignored on conditional orders, always submitting as LastPrice (#3794), thanks for reporting @marco-rigoni
• Fixed Bybit TP/SL conditional orders misclassified as plain Market/Limit during reconciliation
• Fixed Bybit bulk order status reports silently missing conditional (stop/MIT) orders
• Fixed Bybit account state free balance underflowing when locked margin exceeds wallet total during liquidation
• Fixed Databento price precision truncation for fractional tick sizes (#3696), thanks @pandashark
• Fixed Deribit stop order submission missing trigger_price and trigger fields in Python exec client (#3794), thanks for reporting @marco-rigoni
• Fixed Deribit cancel event lost during WebSocket reconnection gap when user.orders subscription update never arrives
• Fixed Deribit duplicate OrderCanceled events when cancel RPC response and user.orders subscription both emit
• Fixed Deribit GenerateOrderStatusReport unable to find closed orders when only client_order_id is provided
• Fixed Deribit next_8_utc GTD expiry calculation panicking on edge-case timestamps outside nanosecond range
• Fixed Deribit historical trade pagination dropping trades when >1000 share a millisecond boundary
• Fixed Deribit late-listed instruments not propagating to HTTP and WebSocket handler caches
• Fixed Deribit request_book_snapshot silently using default 8/8 precision when instrument not in cache
• Fixed Deribit request_bars ignoring limit parameter
• Fixed Deribit request_forward_prices ignoring request client_id override
• Fixed Deribit reset() leaking stream tasks by replacing cancellation token without canceling the old one
• Fixed Deribit send_auth_request silently dropping serialization and channel send errors
• Fixed Deribit send_subscribe/send_unsubscribe leaving subscription state wedged on command send failure
• Fixed Deribit VenueOrderId comparison via unnecessary string conversion in fill report filtering
• Fixed Deribit OrderSide conversion using fragile string round-trip instead of order_side_to_pyo3 in _submit_order and _submit_order_list
• Fixed Deribit WebSocket connect() not clearing subscription state for manual disconnect/reconnect cycles
• Fixed dYdX WebSocket account state parsing failing on empty string balances from zero-equity accounts
• Fixed dYdX WebSocket handler repeatedly emitting NewInstrumentDiscovered for uncached instruments on every v4_markets update
• Fixed Hyperliquid _submit_order_list passing raw Cython orders to Rust, causing TypeError on bracket/batch orders (#3763), thanks for reporting @jindrichsirucek
• Fixed Hyperliquid _modify_order OrderSide conversion using fragile string round-trip instead of order_side_to_pyo3
• Fixed Hyperliquid vault orders rejected with "Builder fee has not been approved" when vault_address is configured (#3762), thanks for reporting @chester0
• Fixed Interactive Brokers docs request_ticks API and add contract example (#3699), thanks @faysou
• Fixed Interactive Brokers live-session synchronization and reconciliation (#3715), thanks @faysou
• Fixed Interactive Brokers shared historical request dedup for concurrent warmup (#3719), thanks @Johnkhk
• Fixed Interactive Brokers historical bar subscriptions not restored after daily gateway restart (#3733), thanks for reporting @bomber555
• Fixed Interactive Brokers inactive order status handling to prevent silent dropping (#3723), thanks @pandashark
• Fixed Interactive Brokers trailing stop order field parsing during reconciliation and open-order updates (#3771), thanks @faysou
• Fixed Interactive Brokers spread instrument not found on restart reconciliation (#3753), thanks @davidsblom
• Fixed Interactive Brokers adapter not reconnecting on error 326 during gateway restart (#3796), thanks @Johnkhk
• Fixed Kraken post-only order rejection not setting due_post_only on OrderRejected events (Spot and Futures)
• Fixed OKX option conditional order rejection emitting OrderSubmitted before anyhow::bail!, leaving orders stuck in Submitted state
• Fixed OKX MarketToLimit orders not rejected for options in HTTP and WebSocket clients
• Fixed OKX determine_order_type classifying IV/USD-priced option IOC orders as Market when primary px field is empty
• Fixed OKX BboTbt quote parsing spamming errors on empty bid/ask arrays for illiquid options by adding QuoteCache for partial quote merging
• Fixed OKX _subscribe_instrument_status raising NotImplementedError instead of being a no-op (status detected via polling)
• Fixed OKX batch_cancel_all_orders and batch_cancel_orders not emitting OrderCancelRejected events for regular (non-algo) batch cancel failures
• Fixed OKX batch_submit_orders not removing order_identities from dispatch state on batch submit failure
• Fixed OKX business WebSocket requiring API credentials for public-only candle data
• Fixed OKX parse_fill_report erroring on zero incremental fill quantity during reconnect replay instead of skipping gracefully
• Fixed OKX request_position_status_reports querying positions API for Spot/Margin instruments (unsupported by endpoint)
• Fixed OKX cancel_all_orders and batch_cancel_orders not seeding order_identities for reconciliation-loaded orders
• Fixed OKX pending_orders, pending_cancels, and pending_amends maps leaking entries on WebSocket send failure
• Fixed OKX duplicate fills after WebSocket reconnect when replayed messages have the same trade_id
• Fixed OKX HTTP algo order helpers ignoring per-item sCode, treating venue rejections as success
• Fixed OKX batch algo cancel not emitting OrderCancelRejected events for per-item or batch-level failures
• Fixed OKX spot margin short position quantity exceeding size_precision from quote-to-base division
• Fixed OKX parse_rfc3339_timestamp silently wrapping negative i64 nanoseconds to garbage u64
• Fixed OKX update_fee_fill_caches diverging from shared parse_fee_currency (missing non-zero fee warning)
• Fixed OKX duplicate fill early return skipping terminal cleanup for order_identities and order_state_cache
• Fixed OKX position status reports incorrectly filtered by start/end time, dropping unchanged open positions
• Fixed OKX connect() not passing instrument_families for OPTION instrument requests (HTTP 400 from OKX API)
• Fixed OKX base_url_ws ignored for private and business WebSocket channels (#3727), thanks for reporting @Stamppot82
• Fixed OKX exec client crash on empty account when OKX returns empty strings for numeric balance fields (#3772), thanks for reporting @ProfitChef
• Fixed Polymarket WebSocket initial vs incremental subscribe (#3717), thanks @Javdu10
• Fixed Polymarket cancel request silently dropped when venue_order_id not yet available, causing order to remain open until next reconciliation (Python and Rust)
• Fixed Polymarket market BUY quote-to-base quantity calculation using worst crossing price instead of per-level accumulation (#3747), thanks @filipmacek
• Fixed Polymarket FOK orders stuck in accepted state when WS terminal status update is missed; deferred REST status check resolves after 5s
• Fixed Polymarket fee rate cache serving stale values indefinitely; added 5-minute TTL with graceful fallback on refresh failure
• Fixed Polymarket calculate_market_price not bailing when all book levels have zero price or size
• Fixed Polymarket created_at timestamp conversion (#3785), thanks @filipmacek
• Fixed Polymarket ts_init timestamps on reports and reconciliation (#3786), thanks @filipmacek
• Fixed Polymarket position reconciliation dust cycling by filtering sub-threshold positions and implementing Data API position reports (#3774), thanks @filipmacek
• Fixed Polymarket duplicate inferred fill panic when order update races trade (#3770), thanks for reporting @Javdu10
• Fixed Polymarket query_order panic from block_on inside async runtime (#3803), thanks for reporting @Javdu10
• Fixed Polymarket order stuck in non-terminal state when fills race with cancel (#3797), thanks for reporting @Javdu10
• Fixed Tardis data client CTRL+C not responding due to signal starvation in LiveNode event loop
• Fixed Tardis data client stop()/disconnect() lifecycle leaving tasks alive or is_connected stale
• Fixed Tardis data client derivative_ticker not streaming unless manually added to data_types

Internal Improvements

• Added SpreadQuoteAggregator (#3698), thanks @faysou
• Added Params and dict field support for #[custom_data] and @customdataclass persistence (#3765), thanks @faysou
• Added BINANCE_GTX_ORDER_REJECT_CODE and BINANCE_SPOT_POST_ONLY_REJECT_MSG constants for reliable post-only rejection detection in Rust
• Added batch_submit_limit_pair to ExecTesterConfig for order list testing
• Added Python strategy support to v2 LiveNode with add_strategy_from_config
• Added Python exec algorithm support to v2 LiveNode with add_exec_algorithm_from_config
• Added LiveNode integration tests for actor, strategy, and exec algorithm registration
• Added LiveNode::add_exec_algorithm for registering execution algorithms on the Rust live trading node
• Added LiveNode stop-handle timeout test for shutdown reliability
• Added ExecutionEngine runtime external order creation from OrderStatusReport for exchange-generated orders (liquidation, ADL, settlement) not previously in cache (Rust)
• Added add_exec_algorithm_from_config PyO3 binding on LiveNode with ImportableExecAlgorithmConfig
• Added msgbus::has_endpoint for endpoint existence checks
• Added backtest margin models, FXRolloverInterestModule, PerContractFeeModel, and SimulationModule trait in Rust
• Added subscribe_option_greeks support to DataTester in Rust
• Added WebSocketClient.notify_closed() for stream-mode callers to signal reader EOF to the controller
• Added pending cancel/update to event emitter in Rust (#3739), thanks @Javdu10
• Added LimitIfTouched, MarketToLimit, TrailingStopMarket, and TrailingStopLimit to transform_order_to_pyo3 Cython-to-PyO3 order converter
• Added PyO3 type assertions to adapter submit-order tests (Hyperliquid, Bybit, Kraken, Architect AX) to catch Cython/PyO3 type boundary regressions
• Added Binance missing BinanceFilterType variants and RawRequests rate limit type for complete API enum coverage (Rust)
• Added Binance unit tests for liquidation, ADL, settlement, and insurance fill parsing with is_exchange_generated detection (Rust)
• Added Binance parametrized tests for resolve_commission fallback and make_venue_position_id (Rust)
• Added Binance Futures priceMatch (BBO) order support (Rust)
• Added Bybit BybitWsFrame enum separating wire-level deserialization from public BybitWsMessage API per adapter spec pattern
• Added Bybit frame classification and subscription correlation test coverage (25 handler tests)
• Added Databento feed handler integration tests with mock LSG server
• Added Databento MBO buffering unit tests and proptests
• Added OKX QuoteCache integration and option greeks subscription lifecycle tests
• Added OKX reconciliation pagination cap warnings when fetches hit the maximum page limit
• Added OKX trade-level fill dedup via emitted_trades DashSet with atomic insert for cross-stream safety
• Added OKX AlgoCancelContext and dispatch_algo_cancels to centralize algo cancel partitioning and rejection handling
• Added OKX options fill fields (fill_px_vol, fill_px_usd, fill_fwd_px) and order pricing fields (px_usd, px_vol) to WebSocket and HTTP models
• Added OKX execution client integration tests for trade dedup, algo cancel rejections, batch cancel failures, and concurrent dedup
• Added OKX HTTP mock test for place_algo_order sCode rejection path
• Added OKX OKXPriceType, OKXSettlementState, OKXQuickMarginType enums for type-safe field deserialization
• Added Tardis HTTP and WebSocket mock server integration tests
• Replaced Binance WsDispatchState DashSet dedup with FifoCache from nautilus_common for bounded FIFO eviction with proper remove() cleanup
• Replaced Bybit topic string constants with BybitWsPublicChannel and BybitWsPrivateChannel enum references
• Replaced AtomicMap and AtomicSet type aliases with newtypes wrapping ArcSwap for ergonomic read-heavy concurrent collections
• Replaced DashMap/DashSet with AtomicMap/AtomicSet for subscription tracking sets, instrument caches, and bar type caches across all adapters
• Refactored computation of greeks (#3691), thanks @faysou
• Refactored DataEngine instrument subscribers to message bus pattern, enabling execution clients to receive live instrument updates via on_instrument without polling (#3766), thanks @filipmacek
• Refactored data and execution client startup into two phases with a data event drain between them (#3773), thanks @filipmacek
• Refactored Deribit trade pagination into TradePaginator with dedup and cursor logic shared across public trades and fill reports
• Refactored Polymarket HTTP client and improved outcome enum (#3702), thanks @filipmacek
• Refactored Tardis adapter module organization to align with adapter spec (common/, machine/cache.rs)
• Refactored Tardis TardisDataClient with Credential::resolve(), centralized URL resolution, and AHashMap
• Regenerated Binance Spot SBE codecs from schema 3:3 XML using Real Logic SBE tool v1.37.1
• Moved cache purge timers to base ExecutionEngine in Python
• Improved socket clients reconnect and shutdown reliability
• Improved LiveNode event loop to use biased select! with pinned ctrl_c for reliable signal handling
• Improved Binance Spot SBE HTTP parsers to use block_length from the message header for end-of-block skip, making decoders forward-compatible with future schema additions
• Improved Databento live price precision handling with maps populated from instrument definitions
• Improved Polymarket Rust adapter (#3726), thanks @filipmacek
• Improved Polymarket execution client (#3734), thanks @filipmacek
• Improved Polymarket adapter in Rust (#3760), thanks @filipmacek
• Refined TimeEventHandler ordering and fixed spread quote timestamps (#3764), thanks @faysou
• Refined SpreadQuoteAggregator transition from historical to live mode (#3759), thanks @faysou
• Refined handling of instruments in catalog (#3761), thanks @faysou
• Refined AtomicTime mode switching and datetime panics
• Refined base catalog interface (#3703), thanks @faysou
• Refined IB option symbols to be OCC compliant (#3731), thanks @faysou
• Standardized type_name() across order events and instruments
• Wired ExecutionManager into live event loop with full inflight lifecycle (Rust) (#3798), thanks @filipmacek
• Optimized network client performance and add benchmarks
• Upgraded Interactive Brokers ibapi to 10.45 (#3804)
• Upgraded Rust (MSRV) to 1.94.1
• Upgraded capnp and capnpc crates to v0.25.3 (regenerated schemas with 4-space indents and version headers)
• Upgraded databento crate to v0.45.0
• Upgraded datafusion crate to v53.0.0
• Upgraded pyo3 crate to v0.28.3
• Upgraded redis crate to v1.2.0
• Upgraded tokio crate to v1.51.0
• Upgraded tokio-tungstenite crate to v0.29.0

Documentation

• Added Rust tutorial for Betfair book imbalance backtest with DataActor walkthrough
• Added Options concept guide with chain architecture, subscription API, strike filtering, and snapshot modes
• Added Greeks concept guide covering venue-provided and local calculator paths
• Added end-to-end data flow and execution flow sequence diagrams to architecture concepts
• Added Events concept guide with event catalog, handler dispatch, and fill-to-position chain
• Added Rust concept guide with capability matrix, project setup, and feature flags
• Added how_to/configure_live_trading.md extracted from concepts/live.md configuration content
• Added adapter developer guide sections for WS unit tests, close/stream patterns, and split-client architecture
• Added adapter developer guide sections for symbol normalization, status diffing, task management, data event emission, and AuthTracker
• Added adapter developer guide section on configuration best practices: builder defaults, T vs Option<T> rules, Default delegation pattern
• Added adapter developer guide section on block_on safety rules and spawn_task usage in sync trait methods
• Added OKX options trading section to integration guide with pricing modes, order types, restrictions, and configuration
• Added Group 10 (options trading) to execution testing spec with venue-agnostic test cases
• Added DeltaNeutralVol README updates for strangle entry flow, config fields, and usage examples
• Added Binance Link & Trade clientOrderId decoding section with usage examples to integration docs
• Added Bybit options support matrix and trading limitations to integration docs
• Added OKX to adapter support tables in Options and Greeks concept guides
• Added option greeks test cases (TC-D62, TC-D63) with config examples to the data testing spec
• Added test style guidance against log capture assertions in developer testing guide
• Rewrote Live Trading concept guide for accuracy (reconciliation, periodic timers, lookback windows)
• Rewrote Custom Data architecture docs for two-mode (Rust/Python) registration
• Improved Value Types concept guide with full arithmetic operator and unary operation docs
• Improved accuracy of Greeks and Options concept guides, thanks @faysou
• Improved concepts/live.md to focus on reconciliation explanation, linking to how-to for configuration
• Updated all API reference links to Sphinx HTML paths
• Migrated Python API reference from sphinx-markdown-builder to Sphinx HTML with Furo theme
• Fixed actors timer example referencing nonexistent on_timer and on_alert hooks