CI for csaxs_bec / test (push) Failing after 2m51s
Generic BEC staging (stage_all_devices/pre_scan_all_devices) has no per-scan device opt-in -- every enabled device is staged/pre_scanned for every scan type (grid_scan, line_scan, alignment moves, ...), not just the ones that consume its data. deviceTags (ptycho_flomni) are never consulted by that code path, they're purely a client-side grouping convenience. So omny_panda_continuous was being Arm()ed and disarmed for every scan in a session even though only flomni_fermat_scan reads its data -- unnecessary hardware arm/disarm cycling, and it directly compounds the stale frame_counter carryover bug documented in PANDA_POSITION_VALIDATION.md sec 7 (more arm cycles means more abort->restage windows where that bug can be triggered). PandaBoxOMNY now takes an arm_scan_allowlist constructor kwarg (None by default, arms for every scan -- unchanged behavior). When set, on_stage() computes _should_arm_panda from scan_parameters.scan_name against the list; on_pre_scan() skips sending Arm() entirely when it's False, and on_complete() skips the wait-for-frame-count poll loop the same way, both resolving immediately instead. The data-readout thread/TCP connection startup in on_stage() is untouched, since it doesn't touch PandA's hardware register state (COUNTER1) the way Arm() does. ptycho_flomni.yaml's omny_panda_continuous now sets arm_scan_allowlist: [flomni_fermat_scan]. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>