Add nielsenvisneuropixelsglx stimulus reader to fix symmetry test

The nielsen_visnp DAQ system config references reader class
ndi.setup.daq.reader.mfdaq.stimulus.nielsenvisneuropixelsglx which
did not exist in Python, causing the kjnielsenlab blank session test
to show 3 DAQ systems instead of 4.

Creates a minimal stimulus reader class inheriting from the NDR reader,
following the same pattern as nielsenvisintan. Registers it in the
class registry so DAQ system loading succeeds.

https://claude.ai/code/session_01WSbupNz1kLD3RqBMg85ZjJ

Author: claude

src/ndi/class_registry.py

@@ -43,6 +43,9 @@ def _build_registry() -> dict[str, type]:
     from .setup.daq.reader.mfdaq.stimulus.nielsenvisintan import (
         ndi_setup_daq_reader_mfdaq_stimulus_nielsenvisintan,
     )
+    from .setup.daq.reader.mfdaq.stimulus.nielsenvisneuropixelsglx import (
+        ndi_setup_daq_reader_mfdaq_stimulus_nielsenvisneuropixelsglx,
+    )
     from .setup.daq.reader.mfdaq.stimulus.vhaudreybpod import (
         ndi_setup_daq_reader_mfdaq_stimulus_VHAudreyBPod,
     )
@@ -71,6 +74,7 @@ def _build_registry() -> dict[str, type]:
         ndi_daq_reader_mfdaq_spikegadgets,
         ndi_setup_daq_reader_mfdaq_stimulus_vhlabvisspike2,
         ndi_setup_daq_reader_mfdaq_stimulus_nielsenvisintan,
+        ndi_setup_daq_reader_mfdaq_stimulus_nielsenvisneuropixelsglx,
         ndi_setup_daq_reader_mfdaq_stimulus_VHAudreyBPod,
     ):
         registry[cls.NDI_DAQREADER_CLASS] = cls

src/ndi/setup/daq/reader/mfdaq/stimulus/__init__.py

@@ -7,11 +7,15 @@
 """
 
 from .nielsenvisintan import ndi_setup_daq_reader_mfdaq_stimulus_nielsenvisintan
+from .nielsenvisneuropixelsglx import (
+    ndi_setup_daq_reader_mfdaq_stimulus_nielsenvisneuropixelsglx,
+)
 from .vhaudreybpod import ndi_setup_daq_reader_mfdaq_stimulus_VHAudreyBPod
 from .vhlabvisspike2 import ndi_setup_daq_reader_mfdaq_stimulus_vhlabvisspike2
 
 __all__ = [
     "ndi_setup_daq_reader_mfdaq_stimulus_vhlabvisspike2",
     "ndi_setup_daq_reader_mfdaq_stimulus_nielsenvisintan",
+    "ndi_setup_daq_reader_mfdaq_stimulus_nielsenvisneuropixelsglx",
     "ndi_setup_daq_reader_mfdaq_stimulus_VHAudreyBPod",
 ]

src/ndi/setup/daq/reader/mfdaq/stimulus/nielsenvisneuropixelsglx.py

@@ -0,0 +1,42 @@
+"""ndi.setup.daq.reader.mfdaq.stimulus.nielsenvisneuropixelsglx — Nielsen Lab visual stimulus NeuropixelsGLX reader.
+
+Extends the NDR reader with support for Nielsen Lab visual stimulus
+files (.analyzer) recorded on a Neuropixels GLX system.
+
+MATLAB equivalent: ``+ndi/+setup/+daq/+reader/+mfdaq/+stimulus/nielsenvisneuropixelsglx.m``
+
+The associated DAQ system configuration expects these epoch files:
+
+- ``#.nidq.bin`` — NI-DAQ binary data (SpikeGLX)
+- ``#.nidq.meta`` — NI-DAQ metadata
+- ``#.imec0.ap.meta`` — Imec probe metadata
+- ``#.analyzer`` — Nielsen Lab Analyzer stimulus structure
+- ``epochprobemap.txt`` — epoch-to-probe mapping
+
+Stimulus metadata is read by the companion
+:class:`~ndi.daq.metadatareader.nielsenlab_stims.ndi_daq_metadatareader_NielsenLabStims`.
+"""
+
+from __future__ import annotations
+
+import logging
+
+from ndi.daq.reader.mfdaq.ndr import ndi_daq_reader_mfdaq_ndr
+
+logger = logging.getLogger(__name__)
+
+
+class ndi_setup_daq_reader_mfdaq_stimulus_nielsenvisneuropixelsglx(ndi_daq_reader_mfdaq_ndr):
+    """Nielsen Lab visual stimulus reader built on Neuropixels GLX via NDR.
+
+    Inherits all channel reading and sample-rate logic from the NDR
+    reader.  The stimulus-specific behaviour (extracting Analyzer
+    parameters) is handled by the metadata reader
+    ``ndi.daq.metadatareader.NielsenLabStims`` configured alongside this
+    reader in the DAQ system.
+    """
+
+    NDI_DAQREADER_CLASS = "ndi.setup.daq.reader.mfdaq.stimulus.nielsenvisneuropixelsglx"
+
+    def __repr__(self) -> str:
+        return f"ndi_setup_daq_reader_mfdaq_stimulus_nielsenvisneuropixelsglx(id={self.id[:8]}...)"