{
 "_comment": "INSTR-01 SYNTHETIC FIXTURE - `state-legacy.json` with a SECOND roster unit already latched. Not a copy of any live state file. It exists to restore M12 END-TO-END on the STAGED leg, which is the arrangement SAFETY-44 and INSTR-01's first draft both missed: `snapshot_over()` starts the after-leg over the file the BEFORE-leg wrote, so a transition-made destination is available there and the two questions the provenance clause and the narrowing ask are NOT incompatible. Every same-step arrangement makes them incompatible; that is what was measured and over-generalised to 'no fixture can'.",
 "phase": "idle",
 "phase_started": "2026-08-07T10:00:00+00:00",
 "last_completed": "2026-08-07T18:42:00+00:00",
 "last_start_attempt": "2026-08-07T10:00:00+00:00",
 "sign_tripped": true,
 "sign_reason": "SIGN_DISAGREEMENT: commanded -1800 W against a meter reading -1450 W for 190 s",
 "auto": true,
 "unit/shed/sign_tripped": true,
 "unit/shed/sign_reason": "SIGN_DISAGREEMENT: shed, latched before the switch"
}