Optional-final-silence topology and mass gate: behavioral red history
2026-08-14

Command for both negative controls:

  cmake --build build --target test_bw_state_seq_build -j4
  ctest --test-dir build -R '^bw_state_seq_build$' --output-on-failure

Second-initial-state negative control:

  After the final-bypass graph transform, set the first lexical emitting
  state's n_prior to zero. The focused CTest failed with:

  FAIL: graph has exactly one frame-zero emitting entry

Exit-mass negative control:

  Change the direct final-exit bypass probability from 0.5 to 0.6 while
  leaving retained outgoing mass at 0.5. The focused CTest failed with:

  FAIL: retained and bypass final alternatives total one

Both mutations were removed. The focused CTest passed afterward.
