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GraphEngine(enable_data=True): - Creates MemoryStore + OpLogger - Injects op_logger into all components - Exposes engine.op_log and engine.memory_store properties E2E tests (test_e2e_data.py): - Engine data mode creates store + logger - Default engine has no store - PeDmaMsg completes successfully with data mode - DataExecutor GEMM accuracy: random f16 matmul with f32 accumulation - DataExecutor chain: GEMM → exp correctness - DataExecutor verify API: pass/fail per tensor - MemoryStore snapshot isolation between Phase 1 and Phase 2 382 tests passing. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>