The mid-band advisory label (constituent signals in conflict) was called
NEUTRAL, implying "benign middle" — but retrospective data (637 trades)
shows it is empirically the worst-ROI regime. Renaming to UNKNOWN makes
the semantics explicit for regime-gate consumers.
- esof_advisor.py: emits UNKNOWN; LABEL_COLOR keeps NEUTRAL alias for
historical CH rows / stale HZ snapshots
- esof_gate.py: S6_MULT, IRP_PARAMS, Strategy A mult_map all keyed on
UNKNOWN with NEUTRAL alias (values identical → replays unaffected)
- prod/docs/ESOF_LABEL_MIGRATION.md: migration note, CH/HZ impact,
rollback procedure
Plan ref: Task 4 — NEUTRAL→UNKNOWN is load-bearing for the EsoF gate
in the orchestrator (0.25× sizing vs 1.0× under old label semantics).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>