The code behind the documentation: one simulator-independent algorithm core, and the adapters that run it.

Layer	Where	Start at
Core — the protocol, no simulator headers	`core/include/anthocnet/core/`	`anthocnet::core::AntRouterLogic` (the per-node state machine), `anthocnet::core::RouteDecision` (what it asks an adapter to do), `ports.h` (the only window on time, randomness and neighbours)
Pheromone state	same	`anthocnet::core::PheromoneTable`, `anthocnet::core::PheromoneEngine`, `anthocnet::core::ILinkMetric`
Ants on the wire	same	`anthocnet::core::AntMessage`, `ant_message_codec.h` (wire format)
Configuration	same	`anthocnet::core::Config` — every default traces to a source or a measurement (configuration)
ns-3 adapter	`ns3/model/`, `ns3/helper/`	`ns3::anthocnet::RoutingProtocol`, `ns3::AntHocNetHelper`
Browser adapter — the learn site's simulation (ADR-0021)	`web/include/ahn_web/`	`ahn_web::World`, `ahn_web::Node`

How the pieces fit — the adapter contract, and why time and randomness only arrive through ports — is in Architecture and Software layers. The golden rules every change keeps are in AGENTS.md.