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Specifications

The engine is specified by subsystem. These documents are the authoritative definitions of Hydra’s behaviour:

DocumentScope
crates/engine-wds/src/model/spec.mdData model, unit system, model file formats
crates/engine-wds/src/hydraulics/spec.mdHydraulic engine: GGA solver, sparse Cholesky, valves, demands
crates/engine-wds/src/quality/spec.mdQuality engine: transport, mixing, reactions, source injection
crates/engine-wds/src/simulation/spec.mdSimulation orchestrator: controls, timestep, accounting, session API
crates/engine-wds/src/analysis/spec.mdPost-simulation analytics: demand reliability, service compliance