Initial commit — Amirine Cosplay Lights

Arduino Uno + WS2812B LED strip controller with a text-based lightshow
system. Shows are defined as .txt files (hex color + fade duration per step),
converted to PROGMEM headers by convert_all.py, and navigated at runtime
via a debounced button (tap/double-tap/hold). BSD 2-Clause license.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Makefile

@@ -0,0 +1,53 @@
+# Amirine Cosplay Lights — Build & Upload
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Usage:
+#   make shows             — convert all .txt shows and regenerate shows.h
+#   make build             — compile the sketch
+#   make upload            — convert shows, compile, and upload (auto-detects port)
+#   make upload PORT=/dev/ttyUSB1  — upload to a specific port
+#   make port              — list connected Arduino-compatible devices
+#   make clean             — remove build artifacts
+
+SKETCH    := arduino/cosplay_lights
+FQBN      := arduino:avr:uno
+BUILD_DIR := build
+
+# Auto-detect the first connected Arduino Uno port.
+# Override on the command line: make upload PORT=/dev/ttyUSB1
+PORT ?= $(shell arduino-cli board list 2>/dev/null | awk '/arduino:avr:uno/{print $$1}' | head -1)
+
+# ---- Targets -----------------------------------------------------------
+
+.PHONY: all shows build upload port clean
+
+all: build
+
+## Convert all .txt show files and regenerate shows.h.
+shows:
+	python converter/convert_all.py
+
+## Compile the sketch.
+build:
+	arduino-cli compile --fqbn $(FQBN) --build-path $(BUILD_DIR) $(SKETCH)
+
+## Convert shows, compile, and upload to the Arduino.
+upload: shows build
+	@if [ -z "$(PORT)" ]; then \
+		echo ""; \
+		echo "  No Arduino found. Plug in the USB cable and try again,"; \
+		echo "  or specify the port manually: make upload PORT=/dev/ttyUSB0"; \
+		echo ""; \
+		exit 1; \
+	fi
+	arduino-cli upload --fqbn $(FQBN) --port $(PORT) $(SKETCH)
+	@echo ""
+	@echo "  Uploaded to $(PORT). The show starts immediately."
+
+## List connected Arduino-compatible devices.
+port:
+	@arduino-cli board list
+
+## Remove build artifacts.
+clean:
+	rm -rf $(BUILD_DIR)