Capture one environment snapshot per admitted WABT, JADX, firmware and Wakaru operation. Use it for tool selection, session identity and child launches while preserving configuration updates between operations.
Regressions reproduce changed JVM options under an old session key, mixed engine/limiter selection and environment drift between subprocesses. Keep selected-wrapper and cleanup coverage in a shared fixture with separate scenarios.
Validation: 115 distinct focused tests passed across the final five-file selection, including seven selected-command cases after refactoring. Fresh build, typecheck, lint and formatting passed. Tests use real subprocess fixtures; no real JADX/WABT/Binwalk/Wakaru engine or native Windows verification is claimed.
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