diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3691ca0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,116 @@
+# Ref: https://github.com/arduino/Arduino/blob/master/.gitignore
+
+app/bin/
+app/pde.jar
+build/macosx/work/
+arduino-core/bin/
+arduino-core/arduino-core.jar
+hardware/arduino/bootloaders/caterina_LUFA/Descriptors.o
+hardware/arduino/bootloaders/caterina_LUFA/Descriptors.lst
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.sym
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.o
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.map
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.lst
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.lss
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.elf
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.eep
+hardware/arduino/bootloaders/caterina_LUFA/.dep/
+build/*.zip
+build/*.tar.bz2
+build/windows/work/
+build/windows/*.zip
+build/windows/*.tgz
+build/windows/*.tar.bz2
+build/windows/libastylej*
+build/windows/liblistSerials*
+build/windows/arduino-*.zip
+build/windows/dist/*.tar.gz
+build/windows/dist/*.tar.bz2
+build/windows/launch4j-*.tgz
+build/windows/launch4j-*.zip
+build/windows/launcher/launch4j
+build/windows/WinAVR-*.zip
+build/macosx/arduino-*.zip
+build/macosx/dist/*.tar.gz
+build/macosx/dist/*.tar.bz2
+build/macosx/*.tar.bz2
+build/macosx/libastylej*
+build/macosx/appbundler*.jar
+build/macosx/appbundler*.zip
+build/macosx/appbundler
+build/macosx/appbundler-1.0ea-arduino?
+build/macosx/appbundler-1.0ea-arduino*.zip
+build/macosx/appbundler-1.0ea-upstream*.zip
+build/linux/work/
+build/linux/dist/*.tar.gz
+build/linux/dist/*.tar.bz2
+build/linux/*.tgz
+build/linux/*.tar.xz
+build/linux/*.tar.bz2
+build/linux/*.zip
+build/linux/libastylej*
+build/linux/liblistSerials*
+build/shared/arduino-examples*
+build/shared/reference*.zip
+build/shared/Edison*.zip
+build/shared/Galileo*.zip
+build/shared/WiFi101-Updater-ArduinoIDE-Plugin*.zip
+test-bin
+*.iml
+.idea
+.DS_Store
+.directory
+hardware/arduino/avr/libraries/Bridge/examples/XivelyClient/passwords.h
+avr-toolchain-*.zip
+/app/nbproject/private/
+/arduino-core/nbproject/private/
+/app/build/
+/arduino-core/build/
+
+manifest.mf
+nbbuild.xml
+nbproject
+
+# Ref: https://github.com/espressif/arduino-esp32/blob/master/.gitignore
+tools/xtensa-esp32-elf
+tools/xtensa-esp32s2-elf
+tools/xtensa-esp32s3-elf
+tools/riscv32-esp-elf
+tools/dist
+tools/esptool
+tools/esptool.exe
+tools/mkspiffs
+tools/mklittlefs
+tools/mkfatfs.exe
+tools/openocd-esp32
+
+# Ignore editor backup files and macOS system metadata
+.DS_Store
+.*.swp
+.*.swo
+*~
+
+# Ignore build folder
+/build
+ 
+# Ignore files built by Visual Studio/Visual Micro
+[Dd]ebug/
+[Rr]elease/
+.vs/
+__vm/
+*.vcxproj*
+.vscode/
+platform.sloeber.txt
+boards.sloeber.txt
+
+# Ignore docs build (Sphinx)
+docs/build
+docs/source/_build
+__pycache__/
+_build/
+
+# Test log files
+*.log
+debug.cfg
+debug.svd
+debug_custom.json
\ No newline at end of file
diff --git a/README.md b/README.md
index ec00577..11d7225 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,11 @@
 # pico_v2_arduino_examples
-Pi:Co V2用のArduinoサンプルスケッチ集
+
+[![Compile Sketches](https://github.com/rt-net/pico_v2_arduino_examples/actions/workflows/compile-sketches.yaml/badge.svg)](https://github.com/rt-net/pico_v2_arduino_examples/actions/workflows/compile-sketches.yaml)
+[![Lint](https://github.com/rt-net/pico_v2_arduino_examples/actions/workflows/lint.yaml/badge.svg)](https://github.com/rt-net/pico_v2_arduino_examples/actions/workflows/lint.yaml)
+
+![pico_v2](https://rt-net.github.io/images/picov2/pico_v2.jpg)
+
+Pi:Co V2用のArduinoサンプルスケッチ集です。
 
 ## 動作環境