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1"""Routing strategies for multi-provider LLM inference. 

2 

3Provides a ``RoutingStrategyProtocol`` protocol and concrete implementations: 

4 

5* ``SequentialCascadeStrategy``: Try providers one at a time in priority order. 

6* ``ParallelRaceStrategy``: Fire requests in parallel, return the first success. 

7* ``CostOptimizedStrategy``: Sort providers by token cost, try cheapest first. 

8* ``LatencyOptimizedStrategy``: Route to the provider with the lowest recent latency. 

9 

10The ``LLMRouter`` delegates to whichever strategy is configured via 

11``LLMConfig.strategy``. 

12""" 

13 

14from __future__ import annotations 

15 

16from lexigram.ai.llm.routing.strategies.cost import CostOptimizedStrategy 

17from lexigram.ai.llm.routing.strategies.latency import LatencyOptimizedStrategy 

18from lexigram.ai.llm.routing.strategies.parallel import ParallelRaceStrategy 

19from lexigram.ai.llm.routing.strategies.sequential import SequentialCascadeStrategy 

20from lexigram.contracts.ai.routing import RoutingStrategyProtocol 

21 

22__all__ = [ 

23 "CostOptimizedStrategy", 

24 "LatencyOptimizedStrategy", 

25 "ParallelRaceStrategy", 

26 "RoutingStrategyProtocol", 

27 "SequentialCascadeStrategy", 

28]