diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..a4c1b8d
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,7 @@
+root = true
+
+[*]
+end_of_line = lf
+indent_style = tab
+trim_trailing_whitespace = true
+insert_final_newline = true
diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..6313b56
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+* text=auto eol=lf
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..254135c
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,86 @@
+name: Build
+
+on:
+  push:
+    branches:
+        - '**'
+
+jobs:
+  native-build:
+    name: 'Native build'
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@main
+      with:
+        submodules: true
+    - name: Build Ai
+      run: |
+        bash './build.sh' 'native'
+    - name: Generate tarball
+      run: |
+        declare tarball_filename='/tmp/x86_64-linux-gnu.tar.xz'
+        tar --directory='/tmp' --create --file=- 'ai' | xz --threads='0' --compress -9 > "${tarball_filename}"
+        sha256sum "${tarball_filename}" | sed 's|/tmp/||' > "${tarball_filename}.sha256"
+    - name: Upload artifact
+      uses: actions/upload-artifact@main
+      with:
+        name: native-toolchain
+        if-no-files-found: error
+        path: |
+          /tmp/x86_64-linux-gnu.tar.xz
+          /tmp/x86_64-linux-gnu.tar.xz.sha256
+  
+  cross-build:
+    name: 'Cross build'
+    needs: native-build
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    strategy:
+      matrix:
+        target: [
+          'alpha-unknown-linux-gnu',
+          'x86_64-unknown-linux-gnu',
+          'i386-unknown-linux-gnu',
+          'arm-unknown-linux-gnueabi',
+          'arm-unknown-linux-gnueabihf',
+          'hppa-unknown-linux-gnu',
+          'aarch64-unknown-linux-gnu',
+          'mips-unknown-linux-gnu',
+          'mipsel-unknown-linux-gnu',
+          'powerpc-unknown-linux-gnu',
+          's390-unknown-linux-gnu',
+          's390x-unknown-linux-gnu',
+          'sparc-unknown-linux-gnu',
+          'powerpc64le-unknown-linux-gnu'
+        ]
+    steps:
+    - uses: actions/checkout@main
+      with:
+        submodules: true
+    - name: Download artifact
+      uses: actions/download-artifact@main
+      with:
+        name: native-toolchain
+    - name: Setup toolchain
+      run: |
+        tar --directory='/tmp' --extract --file='./x86_64-linux-gnu.tar.xz'
+        mv '/tmp/ai' '/tmp/ai-toolchain'
+    - name: Build Ai with OBGGCC
+      run: |
+        source './tools/setup_toolchain.sh'
+        source './submodules/obggcc/tools/setup_toolchain.sh'
+        
+        bash './build.sh' '${{ matrix.target }}'
+    - name: Generate tarball
+      run: |
+        declare tarball_filename='/tmp/${{ matrix.target }}.tar.xz'
+        tar --directory='/tmp' --create --file=- 'ai' | xz --threads='0' --compress -9 > "${tarball_filename}"
+        sha256sum "${tarball_filename}" | sed 's|/tmp/||' > "${tarball_filename}.sha256"
+    - name: Upload artifact
+      uses: actions/upload-artifact@main
+      with:
+        name: cross-toolchain
+        if-no-files-found: error
+        path: |
+          /tmp/${{ matrix.target }}.tar.xz
+          /tmp/${{ matrix.target }}.tar.xz.sha256
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..013bb83
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "submodules/obggcc"]
+	path = submodules/obggcc
+	url = https://github.com/AmanoTeam/obggcc
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..153d416
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+  The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+   a) under this License, provided that you make a good faith effort to
+   ensure that, in the event an Application does not supply the
+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
+
+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the Combined Work with a copy of the GNU GPL and this license
+   document.
+
+   c) For a Combined Work that displays copyright notices during
+   execution, include the copyright notice for the Library among
+   these notices, as well as a reference directing the user to the
+   copies of the GNU GPL and this license document.
+
+   d) Do one of the following:
+
+       0) Convey the Minimal Corresponding Source under the terms of this
+       License, and the Corresponding Application Code in a form
+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.
\ No newline at end of file
diff --git a/arm-bookeen-linux-gnueabi.sh b/arm-bookeen-linux-gnueabi.sh
new file mode 100644
index 0000000..9e80956
--- /dev/null
+++ b/arm-bookeen-linux-gnueabi.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+declare extra_configure_flags='--with-cpu=cortex-a8 --with-fpu=neon --with-float=softfp --with-mode=thumb'
+
+declare triplet='arm-bookeen-linux-gnueabi'
+
+declare sysroot='https://web.archive.org/web/0if_/https://github.com/koreader/koxtoolchain/releases/latest/download/bookeen.zip'
diff --git a/build.sh b/build.sh
new file mode 100644
index 0000000..09b5cda
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,262 @@
+#!/bin/bash
+
+set -eu
+
+declare -r current_source_directory="${PWD}"
+
+declare -r revision="$(git rev-parse --short HEAD)"
+
+declare -r toolchain_directory='/tmp/ai'
+
+declare -r gmp_tarball='/tmp/gmp.tar.xz'
+declare -r gmp_directory='/tmp/gmp-6.2.1'
+
+declare -r mpfr_tarball='/tmp/mpfr.tar.xz'
+declare -r mpfr_directory='/tmp/mpfr-4.2.0'
+
+declare -r mpc_tarball='/tmp/mpc.tar.gz'
+declare -r mpc_directory='/tmp/mpc-1.3.1'
+
+declare -r binutils_tarball='/tmp/binutils.tar.xz'
+declare -r binutils_directory='/tmp/binutils-2.41'
+
+declare -r gcc_tarball='/tmp/gcc.tar.gz'
+declare -r gcc_directory='/tmp/gcc-13.2.0'
+
+declare -r optflags='-Os'
+declare -r linkflags='-Wl,-s'
+
+declare -r max_jobs="$(($(nproc) * 8))"
+
+declare build_type="${1}"
+
+if [ -z "${build_type}" ]; then
+	build_type='native'
+fi
+
+declare is_native='0'
+
+if [ "${build_type}" == 'native' ]; then
+	is_native='1'
+fi
+
+declare OBGGCC_TOOLCHAIN='/tmp/obggcc-toolchain'
+declare CROSS_COMPILE_TRIPLET=''
+
+declare cross_compile_flags=''
+
+if ! (( is_native )); then
+	source "./submodules/obggcc/toolchains/${build_type}.sh"
+	cross_compile_flags+="--host=${CROSS_COMPILE_TRIPLET}"
+fi
+
+if ! [ -f "${gmp_tarball}" ]; then
+	curl --connect-timeout '10' --retry '15' --retry-all-errors --fail --silent --url 'https://mirrors.kernel.org/gnu/gmp/gmp-6.2.1.tar.xz' --output "${gmp_tarball}"
+	tar --directory="$(dirname "${gmp_directory}")" --extract --file="${gmp_tarball}"
+fi
+
+if ! [ -f "${mpfr_tarball}" ]; then
+	curl --connect-timeout '10' --retry '15' --retry-all-errors --fail --silent --url 'https://mirrors.kernel.org/gnu/mpfr/mpfr-4.2.0.tar.xz' --output "${mpfr_tarball}"
+	tar --directory="$(dirname "${mpfr_directory}")" --extract --file="${mpfr_tarball}"
+fi
+
+if ! [ -f "${mpc_tarball}" ]; then
+	curl --connect-timeout '10' --retry '15' --retry-all-errors --fail --silent --url 'https://mirrors.kernel.org/gnu/mpc/mpc-1.3.1.tar.gz' --output "${mpc_tarball}"
+	tar --directory="$(dirname "${mpc_directory}")" --extract --file="${mpc_tarball}"
+fi
+
+if ! [ -f "${binutils_tarball}" ]; then
+	curl --connect-timeout '10' --retry '15' --retry-all-errors --fail --silent --url 'https://mirrors.kernel.org/gnu/binutils/binutils-2.41.tar.xz' --output "${binutils_tarball}"
+	tar --directory="$(dirname "${binutils_directory}")" --extract --file="${binutils_tarball}"
+fi
+
+if ! [ -f "${gcc_tarball}" ]; then
+	curl --connect-timeout '10' --retry '15' --retry-all-errors --fail --silent --url 'https://mirrors.kernel.org/gnu/gcc/gcc-13.2.0/gcc-13.2.0.tar.xz' --output "${gcc_tarball}"
+	tar --directory="$(dirname "${gcc_directory}")" --extract --file="${gcc_tarball}"
+fi
+
+[ -d "${gmp_directory}/build" ] || mkdir "${gmp_directory}/build"
+
+cd "${gmp_directory}/build"
+
+../configure \
+	--prefix="${toolchain_directory}" \
+	--enable-shared \
+	--enable-static \
+	${cross_compile_flags} \
+	CFLAGS="${optflags}" \
+	CXXFLAGS="${optflags}" \
+	LDFLAGS="${linkflags}"
+
+make all --jobs
+make install
+
+[ -d "${mpfr_directory}/build" ] || mkdir "${mpfr_directory}/build"
+
+cd "${mpfr_directory}/build"
+
+../configure \
+	--prefix="${toolchain_directory}" \
+	--with-gmp="${toolchain_directory}" \
+	--enable-shared \
+	--enable-static \
+	${cross_compile_flags} \
+	CFLAGS="${optflags}" \
+	CXXFLAGS="${optflags}" \
+	LDFLAGS="${linkflags}"
+
+make all --jobs
+make install
+
+[ -d "${mpc_directory}/build" ] || mkdir "${mpc_directory}/build"
+
+cd "${mpc_directory}/build"
+
+../configure \
+	--prefix="${toolchain_directory}" \
+	--with-gmp="${toolchain_directory}" \
+	--enable-shared \
+	--enable-static \
+	${cross_compile_flags} \
+	CFLAGS="${optflags}" \
+	CXXFLAGS="${optflags}" \
+	LDFLAGS="${linkflags}"
+
+make all --jobs
+make install
+
+declare -ra targets=(
+	'arm-bookeen-linux-gnueabi'
+)
+
+for target in "${targets[@]}"; do
+	source "${current_source_directory}/${target}.sh"
+	
+	declare sysroot_filename='/tmp/sysroot.zip'
+	declare sysroot_directory="/tmp/x-tools/${triplet}/${triplet}/sysroot"
+	
+	curl \
+		--connect-timeout '10' \
+		--retry '15' \
+		--retry-all-errors \
+		--fail \
+		--silent \
+		--location \
+		--output "${sysroot_filename}" \
+		--url "${sysroot}"
+	
+	unzip -d '/tmp' "${sysroot_filename}"
+	
+	tar --extract --directory='/tmp' --file="/tmp/$(basename "${sysroot}" '.zip').tar.gz"
+	
+	[ -d "${toolchain_directory}/${triplet}/lib" ] || mkdir --parent "${toolchain_directory}/${triplet}/lib"
+	
+	cp --recursive "${sysroot_directory}/lib/"* "${toolchain_directory}/${triplet}/lib"
+	cp --recursive "${sysroot_directory}/usr/lib/"* "${toolchain_directory}/${triplet}/lib"
+	cp --recursive "${sysroot_directory}/usr/include" "${toolchain_directory}/${triplet}"
+	
+	while read name; do
+		if [ -f "${name}" ]; then
+			chmod 644 "${name}"
+		elif [ -d "${name}" ]; then
+			chmod 755 "${name}"
+		fi
+	done <<< "$(find "${toolchain_directory}/${triplet}")"
+	
+	cd "${toolchain_directory}/${triplet}/lib"
+	
+	find "${toolchain_directory}/${triplet}/lib" -type 'l' | xargs ls -l | grep '/lib/' | awk '{print "unlink "$9" && ln --symbolic $(basename "$11") $(basename "$9")"}' | /proc/self/exe 
+	find "${toolchain_directory}/${triplet}/lib" -maxdepth '1' -mindepth '1' -type 'd' -exec rm --recursive {} \;
+	
+	sed --in-place 's|/usr/lib|.|g; s|/lib/|./|g' "${toolchain_directory}/${triplet}/lib/libc.so" "${toolchain_directory}/${triplet}/lib/libpthread.so"
+	
+	[ -d "${binutils_directory}/build" ] || mkdir "${binutils_directory}/build"
+	
+	cd "${binutils_directory}/build"
+	rm --force --recursive ./*
+	
+	../configure \
+		--target="${triplet}" \
+		--prefix="${toolchain_directory}" \
+		--enable-gold \
+		--enable-ld \
+		--enable-lto \
+		--disable-gprofng \
+		--with-static-standard-libraries \
+		--with-sysroot="${toolchain_directory}/${triplet}" \
+		${cross_compile_flags} \
+		CFLAGS="${optflags}" \
+		CXXFLAGS="${optflags}" \
+		LDFLAGS="${linkflags}"
+	
+	make all --jobs="${max_jobs}"
+	make install
+	
+	[ -d "${gcc_directory}/build" ] || mkdir "${gcc_directory}/build"
+	
+	cd "${gcc_directory}/build"
+	
+	rm --force --recursive ./*
+	
+	../configure \
+		--target="${triplet}" \
+		--prefix="${toolchain_directory}" \
+		--with-linker-hash-style='gnu' \
+		--with-gmp="${toolchain_directory}" \
+		--with-mpc="${toolchain_directory}" \
+		--with-mpfr="${toolchain_directory}" \
+		--with-bugurl='https://github.com/AmanoTeam/Ai/issues' \
+		--with-pkgversion="Ai v0.1-${revision}" \
+		--with-sysroot="${toolchain_directory}/${triplet}" \
+		--with-native-system-header-dir='/include' \
+		--enable-__cxa_atexit \
+		--enable-cet='auto' \
+		--enable-checking='release' \
+		--enable-clocale='gnu' \
+		--enable-default-ssp \
+		--enable-gnu-indirect-function \
+		--enable-gnu-unique-object \
+		--enable-libstdcxx-backtrace \
+		--enable-link-serialization='1' \
+		--enable-linker-build-id \
+		--enable-lto \
+		--enable-shared \
+		--enable-threads='posix' \
+		--enable-libssp \
+		--enable-languages='c,c++' \
+		--enable-ld \
+		--enable-gold \
+		--disable-libgomp \
+		--disable-bootstrap \
+		--disable-libstdcxx-pch \
+		--disable-werror \
+		--disable-multilib \
+		--disable-plugin \
+		--disable-nls \
+		--without-headers \
+		${extra_configure_flags} \
+		${cross_compile_flags} \
+		CFLAGS="${optflags}" \
+		CXXFLAGS="${optflags}" \
+		LDFLAGS="-Wl,-rpath-link,${OBGGCC_TOOLCHAIN}/${CROSS_COMPILE_TRIPLET}/lib ${linkflags}"
+	
+	LD_LIBRARY_PATH="${toolchain_directory}/lib" PATH="${PATH}:${toolchain_directory}/bin" make \
+		CFLAGS_FOR_TARGET="${optflags} ${linkflags}" \
+		CXXFLAGS_FOR_TARGET="${optflags} ${linkflags}" \
+		all --jobs="${max_jobs}"
+	make install
+	
+	cd "${toolchain_directory}/${triplet}/bin"
+	
+	for name in *; do
+		rm "${name}"
+		ln -s "../../bin/${triplet}-${name}" "${name}"
+	done
+	
+	rm --recursive "${toolchain_directory}/share"
+	rm --recursive "${toolchain_directory}/lib/gcc/${triplet}/"*"/include-fixed"
+	
+	patchelf --add-rpath '$ORIGIN/../../../../lib' "${toolchain_directory}/libexec/gcc/${triplet}/"*"/cc1"
+	patchelf --add-rpath '$ORIGIN/../../../../lib' "${toolchain_directory}/libexec/gcc/${triplet}/"*"/cc1plus"
+	patchelf --add-rpath '$ORIGIN/../../../../lib' "${toolchain_directory}/libexec/gcc/${triplet}/"*"/lto1"
+done
\ No newline at end of file
diff --git a/build_all.sh b/build_all.sh
new file mode 100644
index 0000000..e63c984
--- /dev/null
+++ b/build_all.sh
@@ -0,0 +1,39 @@
+#!/bin/bash
+
+set -eu
+
+declare -ra targets=(
+	'alpha-unknown-linux-gnu'
+	'x86_64-unknown-linux-gnu'
+	'i386-unknown-linux-gnu'
+	'arm-unknown-linux-gnueabi'
+	'arm-unknown-linux-gnueabihf'
+	'hppa-unknown-linux-gnu'
+	'aarch64-unknown-linux-gnu'
+	'mips-unknown-linux-gnu'
+	'mipsel-unknown-linux-gnu'
+	'powerpc-unknown-linux-gnu'
+	's390-unknown-linux-gnu'
+	's390x-unknown-linux-gnu'
+	'sparc-unknown-linux-gnu'
+	'powerpc64le-unknown-linux-gnu'
+	'mips64el-unknown-linux-gnuabi64'
+)
+
+declare -r tarballs_directory="${PWD}/ai-tarballs"
+
+[ -d "${tarballs_directory}" ] || mkdir "${tarballs_directory}"
+
+source './tools/setup_toolchain.sh'
+source './submodules/obggcc/tools/setup_toolchain.sh'
+
+for target in "${targets[@]}"; do
+	bash './build.sh' "${target}"
+	
+	declare tarball_filename="${tarballs_directory}/${target}.tar.xz"
+	
+	tar --directory='/tmp' --create --file=- 'ai' |  xz --threads=0 --compress -9 > "${tarball_filename}"
+	sha256sum "${tarball_filename}" > "${tarball_filename}.sha256"
+	
+	rm --recursive --force '/tmp/ai'
+done
diff --git a/submodules/obggcc b/submodules/obggcc
new file mode 160000
index 0000000..9499bd3
--- /dev/null
+++ b/submodules/obggcc
@@ -0,0 +1 @@
+Subproject commit 9499bd3eeb8a005cbea5c22c1c839f79e2f34e25
diff --git a/tools/setup_toolchain.sh b/tools/setup_toolchain.sh
new file mode 100644
index 0000000..cf14b6c
--- /dev/null
+++ b/tools/setup_toolchain.sh
@@ -0,0 +1,28 @@
+#!/bin/bash
+
+set -eu
+
+declare -r AI_HOME='/tmp/ai-toolchain'
+
+if [ -d "${AI_HOME}" ]; then
+	PATH+=":${AI_HOME}/bin"
+	export AI_HOME \
+		PATH
+	return 0
+fi
+
+declare -r AI_CROSS_TAG="$(jq --raw-output '.tag_name' <<< "$(curl --retry 10 --retry-delay 3 --silent --url 'https://api.github.com/repos/AmanoTeam/Ai/releases/latest')")"
+declare -r AI_CROSS_TARBALL='/tmp/ai.tar.xz'
+declare -r AI_CROSS_URL="https://github.com/AmanoTeam/Ai/releases/download/${AI_CROSS_TAG}/x86_64-unknown-linux-gnu.tar.xz"
+
+curl --connect-timeout '10' --retry '15' --retry-all-errors --fail --silent --location --url "${AI_CROSS_URL}" --output "${AI_CROSS_TARBALL}"
+tar --directory="$(dirname "${AI_CROSS_TARBALL}")" --extract --file="${AI_CROSS_TARBALL}"
+
+rm "${AI_CROSS_TARBALL}"
+
+mv '/tmp/ai' "${AI_HOME}"
+
+PATH+=":${AI_HOME}/bin"
+
+export AI_HOME \
+	PATH