Missing Knowledge and Independent Learning

Record of what the team needed to learn and how that learning influenced the project.

Missing knowledge	How we learned it	What we applied	Evidence or link
Building a discrete-event simulation engine without a library (event queue, clock, tie-breaking)	Python heapq documentation; comparing SimPy's process model against a plain priority queue	A custom event queue with a documented tie order and byte-identical replays	simulator/engine/event_queue.py, #8, Engine Core Developer Guide
Property-based testing (generating many random inputs to check a rule always holds)	Hypothesis documentation and the team testing-strategy notes	Properties such as "processing order never goes backwards" and "every event survives a record round trip"	tests/simulator/engine/test_event_queue.py, tests/simulator/engine/test_events.py