diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..79f872f
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,64 @@
+name: Build
+
+# 単体ビルドの検証。
+#
+# ## なぜ要るのか
+#
+# このモジュールは android-sdk の集約ビルドと、自分だけの単体ビルドの
+# 2 通りで組まれる。開発は集約ビルドで行うため、**単体ビルド側の設定が
+# 静かに腐る。** 実際 1.3.0 のリリースでは、publish ワークフローを回して
+# 初めて次のような不備がまとめて露見した:
+#
+#   - gradlew / settings.gradle.kts が無くて ./gradlew が叩けない
+#   - version catalog に依存の定義が無い（集約側の catalog にはある）
+#   - coroutines が推移的に古い版になり 3 引数 resume が通らない
+#   - ベンダ SDK の版が集約ビルドと食い違う
+#
+# publish のときにしか単体ビルドしないと、リリース当日に気づくことになる。
+# ここで PR ごとに回して、変更した時点で分かるようにする。
+
+on:
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Java
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: '17'
+          cache: 'gradle'
+
+      - name: Build core and compose locally
+        run: |
+          git clone --depth 1 https://github.com/MapConductor/android-sdk-core.git _core
+          cd _core
+          ./gradlew --no-daemon publishToMavenLocal
+          cd ..
+
+          mkdir -p "$HOME/.gradle/init.d"
+          cat > "$HOME/.gradle/init.d/use-local-maven.init.gradle" << 'EOF'
+          gradle.settingsEvaluated { settings ->
+              settings.dependencyResolutionManagement.repositories {
+                  mavenLocal()
+              }
+          }
+          EOF
+
+          git clone --depth 1 https://github.com/MapConductor/android-sdk-compose.git _compose
+          cd _compose
+          ./gradlew --no-daemon publishToMavenLocal
+          cd ..
+
+      # apiCheck は集約ビルド（android-sdk）の gradle/api-surface.gradle.kts が
+      # 提供するタスクで、単体ビルドには存在しない。ここでは組み立てだけを見る。
+      - name: Assemble
+        run: ./gradlew --no-daemon -PskipSampleApp=true assembleRelease
diff --git a/build.gradle.kts b/build.gradle.kts
index 05bc0f4..1c55aa2 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -48,6 +48,10 @@ android {
     }
 }
 
+val libraryGroupId = project.findProperty("libraryGroupId") as String? ?: "com.mapconductor"
+val libraryArtifactId = "for-openmobilemaps"
+val libraryVersion = project.findProperty("libraryVersion") as String? ?: "1.0.0"
+
 dependencies {
     implementation(platform(libs.androidx.compose.bom))
     implementation(libs.androidx.ui)
@@ -74,9 +78,6 @@ dependencies {
     testImplementation(libs.junit)
 }
 
-val libraryGroupId = project.findProperty("libraryGroupId") as String? ?: "com.mapconductor"
-val libraryArtifactId = "for-openmobilemaps"
-val libraryVersion = project.findProperty("libraryVersion") as String? ?: "1.0.0"
 
 // Set project version for NMCP plugin
 version = libraryVersion
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
new file mode 100644
index 0000000..8df69a6
--- /dev/null
+++ b/gradle/libs.versions.toml
@@ -0,0 +1,52 @@
+[versions]
+openmobilemaps = "4.0.0"
+coroutines = "1.9.0"
+agp = "9.2.1"
+kotlin = "2.4.10"
+
+composeBom = "2025.02.00"
+coreKtx = "1.16.0"
+lifecycleRuntimeKtx = "2.8.7"
+okhttp = "5.3.2"
+playServicesMaps = "20.0.0"
+activityCompose = "1.9.3"
+ktLint = "14.2.0"
+
+junit = "4.13.2"
+junitVersion = "1.3.0"
+espressoCore = "3.7.0"
+
+[libraries]
+openmobilemaps-mapscore = { module = "io.openmobilemaps:mapscore", version.ref = "openmobilemaps" }
+kotlinx-coroutines-android = { group = "org.jetbrains.kotlinx", name = "kotlinx-coroutines-android", version.ref = "coroutines" }
+# Jetpack Compose (with BOM)
+androidx-compose-bom = { group = "androidx.compose", name = "compose-bom", version.ref = "composeBom" }
+androidx-ui = { group = "androidx.compose.ui", name = "ui" }
+androidx-ui-tooling-preview = { group = "androidx.compose.ui", name = "ui-tooling-preview" }
+androidx-foundation = { group = "androidx.compose.foundation", name = "foundation" }
+androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
+
+# Lifecycle
+androidx-lifecycle-runtime-ktx = { group = "androidx.lifecycle", name = "lifecycle-runtime-ktx", version.ref = "lifecycleRuntimeKtx" }
+androidx-lifecycle-common-java8 = { group = "androidx.lifecycle", name = "lifecycle-common-java8", version.ref = "lifecycleRuntimeKtx" }
+
+# Google Maps
+okhttp = { module = "com.squareup.okhttp3:okhttp", version.ref = "okhttp" }
+play-services-maps = { module = "com.google.android.gms:play-services-maps", version.ref = "playServicesMaps" }
+
+# Sample app
+androidx-activity-compose = { group = "androidx.activity", name = "activity-compose", version.ref = "activityCompose" }
+androidx-material3 = { group = "androidx.compose.material3", name = "material3" }
+androidx-ui-tooling = { group = "androidx.compose.ui", name = "ui-tooling" }
+
+# Test
+junit = { group = "junit", name = "junit", version.ref = "junit" }
+androidx-junit = { group = "androidx.test.ext", name = "junit", version.ref = "junitVersion" }
+androidx-espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espressoCore" }
+
+[plugins]
+android-application = { id = "com.android.application", version.ref = "agp" }
+android-library = { id = "com.android.library", version.ref = "agp" }
+kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
+kotlin-compose = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }
+jlleitschuh-ktlint = { id = "org.jlleitschuh.gradle.ktlint", version.ref = "ktLint" }
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..e708b1c
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..1d10968
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Fri Apr 11 01:40:57 PDT 2025
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.6.0-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..4f906e0
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..107acd3
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle.kts b/settings.gradle.kts
new file mode 100644
index 0000000..251c5af
--- /dev/null
+++ b/settings.gradle.kts
@@ -0,0 +1,53 @@
+pluginManagement {
+    repositories {
+        google {
+            content {
+                includeGroupByRegex("com\\.android.*")
+                includeGroupByRegex("com\\.google.*")
+                includeGroupByRegex("androidx.*")
+            }
+        }
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        mavenLocal()
+        google()
+        mavenCentral()
+        if (!System.getenv("GPR_USER").isNullOrEmpty() && !System.getenv("GPR_TOKEN").isNullOrEmpty()) {
+            maven {
+                name = "GithubPackages"
+                url = uri("https://maven.pkg.github.com/mapconductor/android-for-openmobilemaps")
+                credentials {
+                    username = System.getenv("GPR_USER") ?: ""
+                    password = System.getenv("GPR_TOKEN") ?: ""
+                }
+            }
+        }
+        if (!System.getenv("GPR_USER").isNullOrEmpty() || !System.getenv("GITHUB_ACTOR").isNullOrEmpty()) {
+            maven {
+                name = "GithubPackages-core"
+                url = uri("https://maven.pkg.github.com/MapConductor/android-sdk-core")
+                credentials {
+                    username = System.getenv("GPR_USER") ?: System.getenv("GITHUB_ACTOR") ?: ""
+                    password = System.getenv("GPR_TOKEN") ?: System.getenv("GITHUB_TOKEN") ?: ""
+                }
+            }
+        }
+    }
+}
+
+rootProject.name = "android-for-openmobilemaps"
+
+if (providers
+        .gradleProperty("skipSampleApp")
+        .map(String::toBoolean)
+        .getOrElse(false)
+        .not()
+) {
+    include(":sample-app")
+}