Module standard 

Discrete-time standard model.

StandardModel is the primary model type, mirroring Julia Agents.jl StandardABM. Each tick:

1. The scheduler produces an ordered list of agent IDs.
2. For each agent, the agent_step function is called with a StepContext.
3. Deferred actions (add/remove) are applied after each agent step.
4. The model_step function is called once (if provided).
5. Time advances by 1.

The agents_first flag controls whether agent steps run before or after the model step (default: agents first).

Determinism

StandardModel is replayable for a fixed seed when all of the following are held constant:

• the same crate version and user step code
• the same initial agents and properties
• the same scheduler semantics
• the same store-dependent ID enumeration behavior where relevant
• the same sequence of deferred insert/remove actions

In practice:

• crate::scheduler::ById provides the strongest built-in ordering guarantee
• crate::scheduler::Fastest inherits store iteration order
• random schedulers remain reproducible only if the pre-randomization ID list is deterministic

Structs

StandardModel

Discrete-time agent-based model.

Traits

HasAgentIds

Trait for types that can provide a snapshot of current agent IDs.

Type Aliases

AgentStepFn

Type alias for the boxed agent step function.