# Sprint 75 Plan: Game and Simulation Semantics Pack

## Context

Game/simulation code depends on update loops, determinism modes, and state sync.
Sprint 75 adds simulation-aware transpilation semantics and verification.

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## Goals

1. Model update-loop and frame semantics
2. Preserve simulation determinism where required
3. Add state-sync and event-order verification
4. Support migration playbooks for game/sim systems

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## Steps

### Step 979: Simulation loop canonical model (12 tests)
### Step 980: Determinism mode packet (`strict`, `best-effort`) (10 tests)
### Step 981: Event-order and state-sync verifier (10 tests)
### Step 982: Floating-point determinism risk classifier (10 tests)
### Step 983: Simulation perf/frame-time gate integration (10 tests)
### Step 984: Replay trace compatibility checker (8 tests)
### Step 985: `whetstone_verify_simulation_port` MCP tool (8 tests)
### Step 986: `whetstone_get_determinism_risks` MCP tool (8 tests)
### Step 987: Simulation migration dossier template (8 tests)
### Step 988: Sprint 75 integration summary + regression (8 tests)

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## Determinism Rule

- Strict-determinism profile requires replay-equal outputs on certified corpus.