Define the intended behaviour
Describe what the system should observe, how it should decide and which actions it may take. Name the inputs, outputs and constraints before selecting an implementation.
Make the assumptions visible
A simulation depends on its data and execution assumptions. Fees, latency and available liquidity can influence results. Document the assumptions so that findings can be interpreted in context.
Test the boundaries
Test more than the normal path. Consider rejected orders, missing data and interrupted connections. Define safe recovery and escalation behaviour for the intended operating environment.
Plan for monitoring
A deployed system needs enough visibility to understand its state and detect problems. Logs, metrics, alerts and review workflows are part of the product, rather than an afterthought.
Iterate with evidence
Use observed behaviour and agreed review criteria to guide changes. Keep configuration and releases traceable so that updates can be evaluated.