diff --git a/sys-process/dinit/Manifest b/sys-process/dinit/Manifest
new file mode 100644
index 0000000..754dac9
--- /dev/null
+++ b/sys-process/dinit/Manifest
@@ -0,0 +1 @@
+DIST dinit-0.21.0.tar.gz 415328 BLAKE2B f1634ce5545918576bf2b2d5a689e9468a480667b28d2525ae1579c67e666aae026ebba99b8b9e67036799dbe0fb42273d23c836e31cce70797d7a0b83a2509f SHA512 9362ddc400570bed7c0d67eeeafef2e339834c8a71948542562e1c5467da7a6f0fad74599118138c02f2d08116a9a8bfe3d9d1a5d02ea0ccf5e97192ea5deea7
diff --git a/sys-process/dinit/dinit-0.21.0.ebuild b/sys-process/dinit/dinit-0.21.0.ebuild
new file mode 100644
index 0000000..fc94097
--- /dev/null
+++ b/sys-process/dinit/dinit-0.21.0.ebuild
@@ -0,0 +1,53 @@
+# Copyright 2026 Shin'ya Minazuki
+EAPI=8
+
+inherit toolchain-funcs
+
+DESCRIPTION="Service monitoring and init system"
+HOMEPAGE="https://davmac.org/projects/dinit/"
+SRC_URI="https://github.com/davmac314/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~amd64"
+
+DEPEND="capabilities? ( sys-libs/libcap )"
+RDEPEND="${DEPEND}"
+BDEPEND="virtual/pkgconfig"
+
+IUSE="+capabilities +cgroups initgroups ioprio oom-adj +openrc shutdown utmpx"
+RESTRICT="mirror"
+
+src_configure() {
+	export CXX="$(tc-getCXX)"
+	export EXTRA_CXXFLAGS="${CFLAGS}"
+
+	./configure --prefix="${EPREFIX}/usr" \
+		--shutdown-prefix="${PN}" \
+		$(use_enable shutdown) \
+		$(use_enable capabilities) \
+		$(use_enable oom-adj) \
+		$(use_enable utmpx) \
+		$(use_enable initgroups) \
+		$(use_enable ioprio)
+
+	# Let the user put their own optimization settings
+	elog "Filtering out upstream's optimization settings..."
+	sed -i -e 's/-Os//' mconfig
+	sed -i -e 's/-flto//' mconfig
+}
+
+src_compile() {
+	emake
+}
+
+src_install() {
+	emake DESTDIR="${D}" install
+	use openrc && newinitd "${FILESDIR}/${PN}.initd-r0" "${PN}"
+	use systemd && systemd_dounit "${FILESDIR}/${PN}.service"
+}
+
+pkg_postinst() {
+	einfo "This package will not override your init system by default,"
+	einfo "and if you want to use it as such, you will have to port the init scripts yourself"
+}
diff --git a/sys-process/dinit/dinit-9999.ebuild b/sys-process/dinit/dinit-9999.ebuild
new file mode 100644
index 0000000..1a19250
--- /dev/null
+++ b/sys-process/dinit/dinit-9999.ebuild
@@ -0,0 +1,50 @@
+# Copyright 2026 Shin'ya Minazuki
+EAPI=8
+
+inherit git-r3 toolchain-funcs
+
+DESCRIPTION="Service monitoring and init system"
+HOMEPAGE="https://davmac.org/projects/dinit/"
+EGIT_REPO_URI="https://github.com/davmac314/dinit"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~amd64"
+
+DEPEND="capabilities? ( sys-libs/libcap )"
+RDEPEND="${DEPEND}"
+BDEPEND=""
+
+IUSE="capabilities cgroups initgroups ioprio oom-adj shutdown utmpx"
+
+src_configure() {
+	export CXX="$(tc-getCXX)"
+	export EXTRA_CXXFLAGS="${CFLAGS}"
+
+	./configure --prefix="${EPREFIX}/usr" \
+		--shutdown-prefix="${PN}" \
+		$(use_enable shutdown) \
+		$(use_enable capabilities) \
+		$(use_enable oom-adj) \
+		$(use_enable utmpx) \
+		$(use_enable initgroups) \
+		$(use_enable ioprio)
+
+	# Let the user put their own optimization settings
+	elog "Filtering out upstream's optimization settings..."
+	sed -i -e 's/-Os//' mconfig
+	sed -i -e 's/-flto//' mconfig
+}
+
+src_compile() {
+	emake
+}
+
+src_install() {
+	emake DESTDIR="${D}" install
+}
+
+pkg_postinst() {
+	einfo "This package will not override your init system by default,"
+	einfo "and if you want to use it as such, you will have to port the init scripts yourself"
+}
diff --git a/sys-process/dinit/files/dinit.initd-r0 b/sys-process/dinit/files/dinit.initd-r0
new file mode 100644
index 0000000..488a9ab
--- /dev/null
+++ b/sys-process/dinit/files/dinit.initd-r0
@@ -0,0 +1,9 @@
+#!/sbin/openrc-run
+# Copyright 2026 Shin'ya Minazuki
+
+supervisor="supervise-daemon"
+
+command="/usr/sbin/${RC_SVCNAME}"
+command_args="-s -d /etc/dinit.d -q"
+command_background="true"
+pidfile="/run/${RC_SVCNAME}.pid"
diff --git a/sys-process/dinit/metadata.xml b/sys-process/dinit/metadata.xml
new file mode 100644
index 0000000..d5af97e
--- /dev/null
+++ b/sys-process/dinit/metadata.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>shinyoukai@laidback.moe</email>
+		<name>Shin'ya Minazuki</name>
+	</maintainer>
+	<use>
+		<flag name="capabilities">Enable support for capabilities (using sys-libs/libcap)</flag>
+		<flag name="initgroups">Enable initialization of supplementary groups for run-as</flag>
+		<flag name="ioprio">Enable support for I/O priority setting</flag>
+		<flag name="oom-adj">Enable support for out of memory score adjustment</flag>
+		<flag name="shutdown">Build the shutdown commands</flag>
+		<flag name="utmpx">Enable manipulation of the utmp/utmpx database</flag>
+	</use>
+</pkgmetadata>