diff --git a/app-shells/fish/fish-4.5.0-r2.ebuild b/app-shells/fish/fish-4.5.0-r2.ebuild
new file mode 100644
index 0000000000000..c84c837afd48c
--- /dev/null
+++ b/app-shells/fish/fish-4.5.0-r2.ebuild
@@ -0,0 +1,141 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+CRATES=""
+
+if [[ ${PV} != 9999 ]]; then
+	declare -A GIT_CRATES=(
+		[pcre2-sys]='https://github.com/fish-shell/rust-pcre2;85b7afba1a9d9bd445779800e5bcafeb732e4421;rust-pcre2-%commit%/pcre2-sys'
+		[pcre2]='https://github.com/fish-shell/rust-pcre2;85b7afba1a9d9bd445779800e5bcafeb732e4421;rust-pcre2-%commit%'
+	)
+fi
+
+RUST_MIN_VER="1.85.0"
+
+PYTHON_COMPAT=( python3_{11..14} )
+
+inherit cargo cmake python-any-r1 readme.gentoo-r1 xdg
+
+DESCRIPTION="Friendly Interactive SHell"
+HOMEPAGE="https://fishshell.com/"
+
+MY_PV="${PV/_beta/b}"
+MY_P="${PN}-${MY_PV}"
+
+if [[ ${PV} == 9999 ]]; then
+	inherit git-r3
+	EGIT_REPO_URI="https://github.com/fish-shell/fish-shell.git"
+else
+	SRC_URI="
+		https://github.com/fish-shell/fish-shell/releases/download/${MY_PV}/${MY_P}.tar.xz
+		https://github.com/gentoo-crate-dist/fish-shell/releases/download/${MY_PV}/fish-shell-${MY_PV}-crates.tar.xz
+		${CARGO_CRATE_URIS}
+	"
+	KEYWORDS="~amd64 ~arm64 ~loong ~ppc64 ~riscv ~x64-macos"
+fi
+
+S="${WORKDIR}/${MY_P}"
+
+LICENSE="GPL-2 BSD BSD-2 CC0-1.0 GPL-2+ ISC LGPL-2+ MIT PSF-2 ZLIB"
+# Dependent crate licenses
+LICENSE+=" Apache-2.0 MIT MPL-2.0 Unicode-3.0 ZLIB"
+SLOT="0"
+IUSE="+doc nls test"
+
+RESTRICT="!test? ( test )"
+
+BDEPEND="
+	virtual/pkgconfig
+	${PYTHON_USEDEP}
+	doc? ( $(python_gen_any_dep 'dev-python/sphinx[${PYTHON_USEDEP}]') )
+	nls? ( sys-devel/gettext )
+	test? (
+		app-misc/tmux
+		dev-vcs/git
+		sys-apps/less
+		$(python_gen_any_dep 'dev-python/pexpect[${PYTHON_USEDEP}]')
+	)
+"
+DEPEND="dev-libs/libpcre2[pcre32]"
+RDEPEND="${DEPEND}"
+
+QA_FLAGS_IGNORED="usr/bin/.*"
+
+python_check_deps() {
+	if use doc; then
+		python_has_version "dev-python/sphinx[${PYTHON_USEDEP}]" || return 1
+	fi
+	if use test; then
+		python_has_version "dev-python/pexpect[${PYTHON_USEDEP}]" || return 1
+	fi
+}
+
+pkg_setup() {
+	if use doc || use test; then
+		python-any-r1_pkg_setup
+	fi
+	rust_pkg_setup
+
+	export PKG_CONFIG_ALLOW_CROSS=1
+}
+
+src_prepare() {
+	# Bug: https://bugs.gentoo.org/952080
+	sed -e '/^lto = /d' -i Cargo.toml || die "Failed to remove LTO from cargo package"
+
+	cmake_src_prepare
+}
+
+src_unpack() {
+	if [[ ${PV} == 9999 ]]; then
+		git-r3_src_unpack
+		cargo_live_src_unpack
+	else
+		cargo_src_unpack
+	fi
+}
+
+src_configure() {
+	local mycmakeargs=(
+		-DCMAKE_INSTALL_SYSCONFDIR="${EPREFIX}/etc"
+		-DCMAKE_INSTALL_DATADIR="${EPREFIX}/usr/share"
+		-DWITH_DOCS="$(usex doc ON OFF)"
+		-DWITH_MESSAGE_LOCALIZATION="$(usex nls ON OFF)"
+		-DRust_CARGO="${CARGO}"
+		-DRust_COMPILER="${RUSTC}"
+	)
+	local -x CMAKE_BUILD_TYPE="$(usex debug Debug Release)"
+	cargo_env cmake_src_configure
+}
+
+src_compile() {
+	local -x CARGO_TERM_COLOR=always
+	cargo_env cmake_src_compile
+}
+
+src_test() {
+	# Very fragile tests, don't seem to work in sandboxed environment.
+	# No die to allow repeating tests.
+	rm -v \
+		tests/checks/tmux-pager.fish \
+		tests/checks/tmux-wrapping.fish \
+		tests/checks/tmux-commandline.fish \
+		tests/checks/tmux-prompt.fish \
+		tests/pexpects/terminal.py \
+		|| :
+
+	cargo_env cmake_build fish_run_tests
+}
+
+src_install() {
+	cargo_env cmake_src_install
+	keepdir /usr/share/fish/vendor_{completions,conf,functions}.d
+	readme.gentoo_create_doc
+}
+
+pkg_postinst() {
+	readme.gentoo_print_elog
+	xdg_pkg_postinst
+}