This should explode in multiple ways. Let's see.

variants/esp32/m5stack_coreink/nicheGraphics.h

@@ -0,0 +1,44 @@
+/*
+
+NicheGraphics setup for M5Stack CoreInk (1.54" 200x200 GDEW0154M09).
+
+The GDEW0154M09 uses an SSD1681-class controller, so the GDEY0154D67 panel
+profile (same controller family, same resolution) drives it directly.
+
+LoRa and the e-ink panel share the default SPI bus (SCLK=18, MOSI=23);
+use the board's default SPI instance rather than spinning up a separate
+HSPI peripheral on the same pins.
+
+*/
+
+#pragma once
+
+#include "configuration.h"
+
+#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
+
+#include "graphics/BaseUIEInkDisplay.h"
+#include "graphics/eink/Panels/GDEY0154D67.h"
+
+class M5CoreInkPanel : public NicheGraphics::Panels::GDEY0154D67
+{
+  protected:
+    SPIClass *beginSpi() override
+    {
+        SPI.begin();
+        return &SPI;
+    }
+};
+
+void setupNicheGraphics() {}
+
+NicheGraphics::BaseUIEInkDisplay *setupNicheGraphicsBaseUI()
+{
+    auto *panel = new M5CoreInkPanel();
+    NicheGraphics::Drivers::EInk *driver = panel->create();
+    auto *display = new NicheGraphics::BaseUIEInkDisplay(driver, panel->rotation());
+    display->setDisplayResilience(10, 2.0f);
+    return display;
+}
+
+#endif // MESHTASTIC_INCLUDE_NICHE_GRAPHICS

variants/esp32/m5stack_coreink/platformio.ini

@@ -1,25 +1,22 @@
 [env:m5stack-coreink]
-extends = esp32_base
+extends = esp32_base, niche
 board = m5stack-coreink
 board_check = true
-build_src_filter = 
+build_src_filter =
   ${esp32_base.build_src_filter}
-build_flags = 
+  ${niche.build_src_filter}
+build_flags =
   ${esp32_base.build_flags}
+  ${niche.build_flags}
   -I variants/esp32/m5stack_coreink
   ;-D RADIOLIB_VERBOSE
   -Ofast
   -D__MCUXPRESSO
-  -DEINK_DISPLAY_MODEL=GxEPD2_154_M09
-  -DEINK_WIDTH=200
-  -DEINK_HEIGHT=200
   -DUSER_SETUP_LOADED
-  -DM5_COREINK 
+  -DM5_COREINK
   -DM5STACK
-lib_deps = 
+lib_deps =
   ${esp32_base.lib_deps}
-  # renovate: datasource=custom.pio depName=GxEPD2 packageName=zinggjm/library/GxEPD2
-  zinggjm/GxEPD2@1.6.8
   # renovate: datasource=custom.pio depName=SensorLib packageName=lewisxhe/library/SensorLib
   lewisxhe/SensorLib@0.3.4
 lib_ignore =