diff --git a/1.26-rc/alpine3.22/Dockerfile b/1.26-rc/alpine3.22/Dockerfile
new file mode 100644
index 00000000..d3de37aa
--- /dev/null
+++ b/1.26-rc/alpine3.22/Dockerfile
@@ -0,0 +1,128 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
+FROM alpine:3.22 AS build
+
+ENV PATH /usr/local/go/bin:$PATH
+
+ENV GOLANG_VERSION 1.26rc1
+
+RUN set -eux; \
+	now="$(date '+%s')"; \
+	apk add --no-cache --virtual .fetch-deps \
+		ca-certificates \
+		gnupg \
+# busybox's "tar" doesn't handle directory mtime correctly, so our SOURCE_DATE_EPOCH lookup doesn't work (the mtime of "/usr/local/go" always ends up being the extraction timestamp)
+		tar \
+	; \
+	arch="$(apk --print-arch)"; \
+	url=; \
+	case "$arch" in \
+		'x86_64') \
+			url='https://dl.google.com/go/go1.26rc1.linux-amd64.tar.gz'; \
+			sha256='b395b5d51d45cf2a19e61855edd7bafaa2dfeaafaf8d9649cb3262fd8b81a96a'; \
+			;; \
+		'armhf') \
+			url='https://dl.google.com/go/go1.26rc1.linux-armv6l.tar.gz'; \
+			sha256='53cb2acc73ae9fe6ca1c94c6798abcdf3ed879202f9bd968f6e1ab0aa23b8212'; \
+			;; \
+		'armv7') \
+			url='https://dl.google.com/go/go1.26rc1.linux-armv6l.tar.gz'; \
+			sha256='53cb2acc73ae9fe6ca1c94c6798abcdf3ed879202f9bd968f6e1ab0aa23b8212'; \
+			;; \
+		'aarch64') \
+			url='https://dl.google.com/go/go1.26rc1.linux-arm64.tar.gz'; \
+			sha256='b254925e2bc55467595e9d9b15a4f61a9102d763a92a972c853e471f0e8365a9'; \
+			;; \
+		'x86') \
+			url='https://dl.google.com/go/go1.26rc1.linux-386.tar.gz'; \
+			sha256='88766dabe34bf9b8a422e5a0788b695a27f0c45b4ce3c1c293ec948d72577f34'; \
+			;; \
+		'ppc64le') \
+			url='https://dl.google.com/go/go1.26rc1.linux-ppc64le.tar.gz'; \
+			sha256='56ea825c6f3ded35af6109108daa14935f31ef7abbf8f410a8a0a428bc6e6de2'; \
+			;; \
+		'riscv64') \
+			url='https://dl.google.com/go/go1.26rc1.linux-riscv64.tar.gz'; \
+			sha256='00ce26401dd50045ca398128a9de1d91fbafbb38cb7706d9c64c13619c6439b3'; \
+			;; \
+		's390x') \
+			url='https://dl.google.com/go/go1.26rc1.linux-s390x.tar.gz'; \
+			sha256='a34cd098dea5c1f53b366a1c6070ab42000437a618696d293e2023a5f91c3df8'; \
+			;; \
+		*) echo >&2 "error: unsupported architecture '$arch' (likely packaging update needed)"; exit 1 ;; \
+	esac; \
+	\
+	wget -O go.tgz.asc "$url.asc"; \
+	wget -O go.tgz "$url"; \
+	echo "$sha256 *go.tgz" | sha256sum -c -; \
+	\
+# https://github.com/golang/go/issues/14739#issuecomment-324767697
+	GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+# https://www.google.com/linuxrepositories/
+	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys 'EB4C 1BFD 4F04 2F6D DDCC  EC91 7721 F63B D38B 4796'; \
+# let's also fetch the specific subkey of that key explicitly that we expect "go.tgz.asc" to be signed by, just to make sure we definitely have it
+	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys '2F52 8D36 D67B 69ED F998  D857 78BD 6547 3CB3 BD13'; \
+	gpg --batch --verify go.tgz.asc go.tgz; \
+	gpgconf --kill all; \
+	rm -rf "$GNUPGHOME" go.tgz.asc; \
+	\
+	tar -C /usr/local -xzf go.tgz; \
+	rm go.tgz; \
+	\
+# save the timestamp from the tarball so we can restore it for reproducibility, if necessary (see below)
+	SOURCE_DATE_EPOCH="$(stat -c '%Y' /usr/local/go)"; \
+	export SOURCE_DATE_EPOCH; \
+	touchy="$(date -d "@$SOURCE_DATE_EPOCH" '+%Y%m%d%H%M.%S')"; \
+# for logging validation/edification
+	date --date "@$SOURCE_DATE_EPOCH" --rfc-2822; \
+# sanity check (detected value should be older than our wall clock)
+	[ "$SOURCE_DATE_EPOCH" -lt "$now" ]; \
+	\
+	if [ "$arch" = 'armv7' ]; then \
+		[ -s /usr/local/go/go.env ]; \
+		before="$(go env GOARM)"; [ "$before" != '7' ]; \
+		{ \
+			echo; \
+			echo '# https://github.com/docker-library/golang/issues/494'; \
+			echo 'GOARM=7'; \
+		} >> /usr/local/go/go.env; \
+		after="$(go env GOARM)"; [ "$after" = '7' ]; \
+# (re-)clamp timestamp for reproducibility (allows "COPY --link" to be more clever/useful)
+		touch -t "$touchy" /usr/local/go/go.env /usr/local/go; \
+	fi; \
+	\
+# ideally at this point, we would just "COPY --link ... /usr/local/go/ /usr/local/go/" but BuildKit insists on creating the parent directories (perhaps related to https://github.com/opencontainers/image-spec/pull/970), and does so with unreproducible timestamps, so we instead create a whole new "directory tree" that we can "COPY --link" to accomplish what we want
+	mkdir /target /target/usr /target/usr/local; \
+	mv -vT /usr/local/go /target/usr/local/go; \
+	ln -svfT /target/usr/local/go /usr/local/go; \
+	touch -t "$touchy" /target/usr/local /target/usr /target; \
+	\
+	apk del --no-network .fetch-deps; \
+	\
+# smoke test
+	go version; \
+# make sure our reproducibile timestamp is probably still correct (best-effort inline reproducibility test)
+	epoch="$(stat -c '%Y' /target/usr/local/go)"; \
+	[ "$SOURCE_DATE_EPOCH" = "$epoch" ]; \
+	find /target -newer /target/usr/local/go -exec sh -c 'ls -ld "$@" && exit "$#"' -- '{}' +
+
+FROM alpine:3.22
+
+RUN apk add --no-cache ca-certificates
+
+ENV GOLANG_VERSION 1.26rc1
+
+# don't auto-upgrade the gotoolchain
+# https://github.com/docker-library/golang/issues/472
+ENV GOTOOLCHAIN=local
+
+ENV GOPATH /go
+ENV PATH $GOPATH/bin:/usr/local/go/bin:$PATH
+# (see notes above about "COPY --link")
+COPY --from=build --link /target/ /
+RUN mkdir -p "$GOPATH/src" "$GOPATH/bin" && chmod -R 1777 "$GOPATH"
+WORKDIR $GOPATH
diff --git a/1.26-rc/alpine3.23/Dockerfile b/1.26-rc/alpine3.23/Dockerfile
new file mode 100644
index 00000000..5084c388
--- /dev/null
+++ b/1.26-rc/alpine3.23/Dockerfile
@@ -0,0 +1,128 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
+FROM alpine:3.23 AS build
+
+ENV PATH /usr/local/go/bin:$PATH
+
+ENV GOLANG_VERSION 1.26rc1
+
+RUN set -eux; \
+	now="$(date '+%s')"; \
+	apk add --no-cache --virtual .fetch-deps \
+		ca-certificates \
+		gnupg \
+# busybox's "tar" doesn't handle directory mtime correctly, so our SOURCE_DATE_EPOCH lookup doesn't work (the mtime of "/usr/local/go" always ends up being the extraction timestamp)
+		tar \
+	; \
+	arch="$(apk --print-arch)"; \
+	url=; \
+	case "$arch" in \
+		'x86_64') \
+			url='https://dl.google.com/go/go1.26rc1.linux-amd64.tar.gz'; \
+			sha256='b395b5d51d45cf2a19e61855edd7bafaa2dfeaafaf8d9649cb3262fd8b81a96a'; \
+			;; \
+		'armhf') \
+			url='https://dl.google.com/go/go1.26rc1.linux-armv6l.tar.gz'; \
+			sha256='53cb2acc73ae9fe6ca1c94c6798abcdf3ed879202f9bd968f6e1ab0aa23b8212'; \
+			;; \
+		'armv7') \
+			url='https://dl.google.com/go/go1.26rc1.linux-armv6l.tar.gz'; \
+			sha256='53cb2acc73ae9fe6ca1c94c6798abcdf3ed879202f9bd968f6e1ab0aa23b8212'; \
+			;; \
+		'aarch64') \
+			url='https://dl.google.com/go/go1.26rc1.linux-arm64.tar.gz'; \
+			sha256='b254925e2bc55467595e9d9b15a4f61a9102d763a92a972c853e471f0e8365a9'; \
+			;; \
+		'x86') \
+			url='https://dl.google.com/go/go1.26rc1.linux-386.tar.gz'; \
+			sha256='88766dabe34bf9b8a422e5a0788b695a27f0c45b4ce3c1c293ec948d72577f34'; \
+			;; \
+		'ppc64le') \
+			url='https://dl.google.com/go/go1.26rc1.linux-ppc64le.tar.gz'; \
+			sha256='56ea825c6f3ded35af6109108daa14935f31ef7abbf8f410a8a0a428bc6e6de2'; \
+			;; \
+		'riscv64') \
+			url='https://dl.google.com/go/go1.26rc1.linux-riscv64.tar.gz'; \
+			sha256='00ce26401dd50045ca398128a9de1d91fbafbb38cb7706d9c64c13619c6439b3'; \
+			;; \
+		's390x') \
+			url='https://dl.google.com/go/go1.26rc1.linux-s390x.tar.gz'; \
+			sha256='a34cd098dea5c1f53b366a1c6070ab42000437a618696d293e2023a5f91c3df8'; \
+			;; \
+		*) echo >&2 "error: unsupported architecture '$arch' (likely packaging update needed)"; exit 1 ;; \
+	esac; \
+	\
+	wget -O go.tgz.asc "$url.asc"; \
+	wget -O go.tgz "$url"; \
+	echo "$sha256 *go.tgz" | sha256sum -c -; \
+	\
+# https://github.com/golang/go/issues/14739#issuecomment-324767697
+	GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+# https://www.google.com/linuxrepositories/
+	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys 'EB4C 1BFD 4F04 2F6D DDCC  EC91 7721 F63B D38B 4796'; \
+# let's also fetch the specific subkey of that key explicitly that we expect "go.tgz.asc" to be signed by, just to make sure we definitely have it
+	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys '2F52 8D36 D67B 69ED F998  D857 78BD 6547 3CB3 BD13'; \
+	gpg --batch --verify go.tgz.asc go.tgz; \
+	gpgconf --kill all; \
+	rm -rf "$GNUPGHOME" go.tgz.asc; \
+	\
+	tar -C /usr/local -xzf go.tgz; \
+	rm go.tgz; \
+	\
+# save the timestamp from the tarball so we can restore it for reproducibility, if necessary (see below)
+	SOURCE_DATE_EPOCH="$(stat -c '%Y' /usr/local/go)"; \
+	export SOURCE_DATE_EPOCH; \
+	touchy="$(date -d "@$SOURCE_DATE_EPOCH" '+%Y%m%d%H%M.%S')"; \
+# for logging validation/edification
+	date --date "@$SOURCE_DATE_EPOCH" --rfc-2822; \
+# sanity check (detected value should be older than our wall clock)
+	[ "$SOURCE_DATE_EPOCH" -lt "$now" ]; \
+	\
+	if [ "$arch" = 'armv7' ]; then \
+		[ -s /usr/local/go/go.env ]; \
+		before="$(go env GOARM)"; [ "$before" != '7' ]; \
+		{ \
+			echo; \
+			echo '# https://github.com/docker-library/golang/issues/494'; \
+			echo 'GOARM=7'; \
+		} >> /usr/local/go/go.env; \
+		after="$(go env GOARM)"; [ "$after" = '7' ]; \
+# (re-)clamp timestamp for reproducibility (allows "COPY --link" to be more clever/useful)
+		touch -t "$touchy" /usr/local/go/go.env /usr/local/go; \
+	fi; \
+	\
+# ideally at this point, we would just "COPY --link ... /usr/local/go/ /usr/local/go/" but BuildKit insists on creating the parent directories (perhaps related to https://github.com/opencontainers/image-spec/pull/970), and does so with unreproducible timestamps, so we instead create a whole new "directory tree" that we can "COPY --link" to accomplish what we want
+	mkdir /target /target/usr /target/usr/local; \
+	mv -vT /usr/local/go /target/usr/local/go; \
+	ln -svfT /target/usr/local/go /usr/local/go; \
+	touch -t "$touchy" /target/usr/local /target/usr /target; \
+	\
+	apk del --no-network .fetch-deps; \
+	\
+# smoke test
+	go version; \
+# make sure our reproducibile timestamp is probably still correct (best-effort inline reproducibility test)
+	epoch="$(stat -c '%Y' /target/usr/local/go)"; \
+	[ "$SOURCE_DATE_EPOCH" = "$epoch" ]; \
+	find /target -newer /target/usr/local/go -exec sh -c 'ls -ld "$@" && exit "$#"' -- '{}' +
+
+FROM alpine:3.23
+
+RUN apk add --no-cache ca-certificates
+
+ENV GOLANG_VERSION 1.26rc1
+
+# don't auto-upgrade the gotoolchain
+# https://github.com/docker-library/golang/issues/472
+ENV GOTOOLCHAIN=local
+
+ENV GOPATH /go
+ENV PATH $GOPATH/bin:/usr/local/go/bin:$PATH
+# (see notes above about "COPY --link")
+COPY --from=build --link /target/ /
+RUN mkdir -p "$GOPATH/src" "$GOPATH/bin" && chmod -R 1777 "$GOPATH"
+WORKDIR $GOPATH
diff --git a/1.26-rc/bookworm/Dockerfile b/1.26-rc/bookworm/Dockerfile
new file mode 100644
index 00000000..095a1afb
--- /dev/null
+++ b/1.26-rc/bookworm/Dockerfile
@@ -0,0 +1,140 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
+FROM buildpack-deps:bookworm-scm AS build
+
+ENV PATH /usr/local/go/bin:$PATH
+
+ENV GOLANG_VERSION 1.26rc1
+
+RUN set -eux; \
+	now="$(date '+%s')"; \
+	arch="$(dpkg --print-architecture)"; arch="${arch##*-}"; \
+	url=; \
+	case "$arch" in \
+		'amd64') \
+			url='https://dl.google.com/go/go1.26rc1.linux-amd64.tar.gz'; \
+			sha256='b395b5d51d45cf2a19e61855edd7bafaa2dfeaafaf8d9649cb3262fd8b81a96a'; \
+			;; \
+		'armhf') \
+			url='https://dl.google.com/go/go1.26rc1.linux-armv6l.tar.gz'; \
+			sha256='53cb2acc73ae9fe6ca1c94c6798abcdf3ed879202f9bd968f6e1ab0aa23b8212'; \
+			;; \
+		'arm64') \
+			url='https://dl.google.com/go/go1.26rc1.linux-arm64.tar.gz'; \
+			sha256='b254925e2bc55467595e9d9b15a4f61a9102d763a92a972c853e471f0e8365a9'; \
+			;; \
+		'i386') \
+			url='https://dl.google.com/go/go1.26rc1.linux-386.tar.gz'; \
+			sha256='88766dabe34bf9b8a422e5a0788b695a27f0c45b4ce3c1c293ec948d72577f34'; \
+			;; \
+		'mips64el') \
+			url='https://dl.google.com/go/go1.26rc1.linux-mips64le.tar.gz'; \
+			sha256='6a554f2c60e67dec8d0ee2fa7b3ecded4773113599e06ca126fb2de87438ea27'; \
+			;; \
+		'ppc64el') \
+			url='https://dl.google.com/go/go1.26rc1.linux-ppc64le.tar.gz'; \
+			sha256='56ea825c6f3ded35af6109108daa14935f31ef7abbf8f410a8a0a428bc6e6de2'; \
+			;; \
+		'riscv64') \
+			url='https://dl.google.com/go/go1.26rc1.linux-riscv64.tar.gz'; \
+			sha256='00ce26401dd50045ca398128a9de1d91fbafbb38cb7706d9c64c13619c6439b3'; \
+			;; \
+		's390x') \
+			url='https://dl.google.com/go/go1.26rc1.linux-s390x.tar.gz'; \
+			sha256='a34cd098dea5c1f53b366a1c6070ab42000437a618696d293e2023a5f91c3df8'; \
+			;; \
+		*) echo >&2 "error: unsupported architecture '$arch' (likely packaging update needed)"; exit 1 ;; \
+	esac; \
+	\
+	wget -O go.tgz.asc "$url.asc"; \
+	wget -O go.tgz "$url" --progress=dot:giga; \
+	echo "$sha256 *go.tgz" | sha256sum -c -; \
+	\
+# https://github.com/golang/go/issues/14739#issuecomment-324767697
+	GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+# https://www.google.com/linuxrepositories/
+	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys 'EB4C 1BFD 4F04 2F6D DDCC  EC91 7721 F63B D38B 4796'; \
+# let's also fetch the specific subkey of that key explicitly that we expect "go.tgz.asc" to be signed by, just to make sure we definitely have it
+	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys '2F52 8D36 D67B 69ED F998  D857 78BD 6547 3CB3 BD13'; \
+	gpg --batch --verify go.tgz.asc go.tgz; \
+	gpgconf --kill all; \
+	rm -rf "$GNUPGHOME" go.tgz.asc; \
+	\
+	tar -C /usr/local -xzf go.tgz; \
+	rm go.tgz; \
+	\
+# save the timestamp from the tarball so we can restore it for reproducibility, if necessary (see below)
+	SOURCE_DATE_EPOCH="$(stat -c '%Y' /usr/local/go)"; \
+	export SOURCE_DATE_EPOCH; \
+	touchy="$(date -d "@$SOURCE_DATE_EPOCH" '+%Y%m%d%H%M.%S')"; \
+# for logging validation/edification
+	date --date "@$SOURCE_DATE_EPOCH" --rfc-2822; \
+# sanity check (detected value should be older than our wall clock)
+	[ "$SOURCE_DATE_EPOCH" -lt "$now" ]; \
+	\
+	if [ "$arch" = 'armhf' ]; then \
+		[ -s /usr/local/go/go.env ]; \
+		before="$(go env GOARM)"; [ "$before" != '7' ]; \
+		{ \
+			echo; \
+			echo '# https://github.com/docker-library/golang/issues/494'; \
+			echo 'GOARM=7'; \
+		} >> /usr/local/go/go.env; \
+		after="$(go env GOARM)"; [ "$after" = '7' ]; \
+# (re-)clamp timestamp for reproducibility (allows "COPY --link" to be more clever/useful)
+		touch -t "$touchy" /usr/local/go/go.env /usr/local/go; \
+	fi; \
+	\
+# ideally at this point, we would just "COPY --link ... /usr/local/go/ /usr/local/go/" but BuildKit insists on creating the parent directories (perhaps related to https://github.com/opencontainers/image-spec/pull/970), and does so with unreproducible timestamps, so we instead create a whole new "directory tree" that we can "COPY --link" to accomplish what we want
+	mkdir /target /target/usr /target/usr/local; \
+	mv -vT /usr/local/go /target/usr/local/go; \
+	ln -svfT /target/usr/local/go /usr/local/go; \
+	touch -t "$touchy" /target/usr/local /target/usr /target; \
+	\
+# smoke test
+	go version; \
+# make sure our reproducibile timestamp is probably still correct (best-effort inline reproducibility test)
+	epoch="$(stat -c '%Y' /target/usr/local/go)"; \
+	[ "$SOURCE_DATE_EPOCH" = "$epoch" ]; \
+	find /target -newer /target/usr/local/go -exec sh -c 'ls -ld "$@" && exit "$#"' -- '{}' +
+
+FROM buildpack-deps:bookworm-scm
+
+# install cgo-related dependencies
+RUN set -eux; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		g++ \
+		gcc \
+		libc6-dev \
+		make \
+		pkg-config \
+	; \
+# go depends on "gold" explicitly on arm64
+# https://github.com/docker-library/golang/issues/570 (go depends on "gold" explicitly on arm64)
+# https://github.com/golang/go/issues/22040
+# ... and as of trixie, "gold" is removed from the "binutils" package:
+# > WARNING: gold is being removed from binutils, and is deprecated upstream.
+# (and available as "binutils-gold" which is also a virtual on bookworm so we can reasonably be explicit everywhere)
+	dpkgArch="$(dpkg --print-architecture)"; \
+	if [ "$dpkgArch" = 'arm64' ]; then \
+		apt-get install -y --no-install-recommends binutils-gold; \
+	fi; \
+	rm -rf /var/lib/apt/lists/*
+
+ENV GOLANG_VERSION 1.26rc1
+
+# don't auto-upgrade the gotoolchain
+# https://github.com/docker-library/golang/issues/472
+ENV GOTOOLCHAIN=local
+
+ENV GOPATH /go
+ENV PATH $GOPATH/bin:/usr/local/go/bin:$PATH
+# (see notes above about "COPY --link")
+COPY --from=build --link /target/ /
+RUN mkdir -p "$GOPATH/src" "$GOPATH/bin" && chmod -R 1777 "$GOPATH"
+WORKDIR $GOPATH
diff --git a/1.26-rc/trixie/Dockerfile b/1.26-rc/trixie/Dockerfile
new file mode 100644
index 00000000..d241b794
--- /dev/null
+++ b/1.26-rc/trixie/Dockerfile
@@ -0,0 +1,140 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
+FROM buildpack-deps:trixie-scm AS build
+
+ENV PATH /usr/local/go/bin:$PATH
+
+ENV GOLANG_VERSION 1.26rc1
+
+RUN set -eux; \
+	now="$(date '+%s')"; \
+	arch="$(dpkg --print-architecture)"; arch="${arch##*-}"; \
+	url=; \
+	case "$arch" in \
+		'amd64') \
+			url='https://dl.google.com/go/go1.26rc1.linux-amd64.tar.gz'; \
+			sha256='b395b5d51d45cf2a19e61855edd7bafaa2dfeaafaf8d9649cb3262fd8b81a96a'; \
+			;; \
+		'armhf') \
+			url='https://dl.google.com/go/go1.26rc1.linux-armv6l.tar.gz'; \
+			sha256='53cb2acc73ae9fe6ca1c94c6798abcdf3ed879202f9bd968f6e1ab0aa23b8212'; \
+			;; \
+		'arm64') \
+			url='https://dl.google.com/go/go1.26rc1.linux-arm64.tar.gz'; \
+			sha256='b254925e2bc55467595e9d9b15a4f61a9102d763a92a972c853e471f0e8365a9'; \
+			;; \
+		'i386') \
+			url='https://dl.google.com/go/go1.26rc1.linux-386.tar.gz'; \
+			sha256='88766dabe34bf9b8a422e5a0788b695a27f0c45b4ce3c1c293ec948d72577f34'; \
+			;; \
+		'mips64el') \
+			url='https://dl.google.com/go/go1.26rc1.linux-mips64le.tar.gz'; \
+			sha256='6a554f2c60e67dec8d0ee2fa7b3ecded4773113599e06ca126fb2de87438ea27'; \
+			;; \
+		'ppc64el') \
+			url='https://dl.google.com/go/go1.26rc1.linux-ppc64le.tar.gz'; \
+			sha256='56ea825c6f3ded35af6109108daa14935f31ef7abbf8f410a8a0a428bc6e6de2'; \
+			;; \
+		'riscv64') \
+			url='https://dl.google.com/go/go1.26rc1.linux-riscv64.tar.gz'; \
+			sha256='00ce26401dd50045ca398128a9de1d91fbafbb38cb7706d9c64c13619c6439b3'; \
+			;; \
+		's390x') \
+			url='https://dl.google.com/go/go1.26rc1.linux-s390x.tar.gz'; \
+			sha256='a34cd098dea5c1f53b366a1c6070ab42000437a618696d293e2023a5f91c3df8'; \
+			;; \
+		*) echo >&2 "error: unsupported architecture '$arch' (likely packaging update needed)"; exit 1 ;; \
+	esac; \
+	\
+	wget -O go.tgz.asc "$url.asc"; \
+	wget -O go.tgz "$url" --progress=dot:giga; \
+	echo "$sha256 *go.tgz" | sha256sum -c -; \
+	\
+# https://github.com/golang/go/issues/14739#issuecomment-324767697
+	GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+# https://www.google.com/linuxrepositories/
+	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys 'EB4C 1BFD 4F04 2F6D DDCC  EC91 7721 F63B D38B 4796'; \
+# let's also fetch the specific subkey of that key explicitly that we expect "go.tgz.asc" to be signed by, just to make sure we definitely have it
+	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys '2F52 8D36 D67B 69ED F998  D857 78BD 6547 3CB3 BD13'; \
+	gpg --batch --verify go.tgz.asc go.tgz; \
+	gpgconf --kill all; \
+	rm -rf "$GNUPGHOME" go.tgz.asc; \
+	\
+	tar -C /usr/local -xzf go.tgz; \
+	rm go.tgz; \
+	\
+# save the timestamp from the tarball so we can restore it for reproducibility, if necessary (see below)
+	SOURCE_DATE_EPOCH="$(stat -c '%Y' /usr/local/go)"; \
+	export SOURCE_DATE_EPOCH; \
+	touchy="$(date -d "@$SOURCE_DATE_EPOCH" '+%Y%m%d%H%M.%S')"; \
+# for logging validation/edification
+	date --date "@$SOURCE_DATE_EPOCH" --rfc-2822; \
+# sanity check (detected value should be older than our wall clock)
+	[ "$SOURCE_DATE_EPOCH" -lt "$now" ]; \
+	\
+	if [ "$arch" = 'armhf' ]; then \
+		[ -s /usr/local/go/go.env ]; \
+		before="$(go env GOARM)"; [ "$before" != '7' ]; \
+		{ \
+			echo; \
+			echo '# https://github.com/docker-library/golang/issues/494'; \
+			echo 'GOARM=7'; \
+		} >> /usr/local/go/go.env; \
+		after="$(go env GOARM)"; [ "$after" = '7' ]; \
+# (re-)clamp timestamp for reproducibility (allows "COPY --link" to be more clever/useful)
+		touch -t "$touchy" /usr/local/go/go.env /usr/local/go; \
+	fi; \
+	\
+# ideally at this point, we would just "COPY --link ... /usr/local/go/ /usr/local/go/" but BuildKit insists on creating the parent directories (perhaps related to https://github.com/opencontainers/image-spec/pull/970), and does so with unreproducible timestamps, so we instead create a whole new "directory tree" that we can "COPY --link" to accomplish what we want
+	mkdir /target /target/usr /target/usr/local; \
+	mv -vT /usr/local/go /target/usr/local/go; \
+	ln -svfT /target/usr/local/go /usr/local/go; \
+	touch -t "$touchy" /target/usr/local /target/usr /target; \
+	\
+# smoke test
+	go version; \
+# make sure our reproducibile timestamp is probably still correct (best-effort inline reproducibility test)
+	epoch="$(stat -c '%Y' /target/usr/local/go)"; \
+	[ "$SOURCE_DATE_EPOCH" = "$epoch" ]; \
+	find /target -newer /target/usr/local/go -exec sh -c 'ls -ld "$@" && exit "$#"' -- '{}' +
+
+FROM buildpack-deps:trixie-scm
+
+# install cgo-related dependencies
+RUN set -eux; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		g++ \
+		gcc \
+		libc6-dev \
+		make \
+		pkg-config \
+	; \
+# go depends on "gold" explicitly on arm64
+# https://github.com/docker-library/golang/issues/570 (go depends on "gold" explicitly on arm64)
+# https://github.com/golang/go/issues/22040
+# ... and as of trixie, "gold" is removed from the "binutils" package:
+# > WARNING: gold is being removed from binutils, and is deprecated upstream.
+# (and available as "binutils-gold" which is also a virtual on bookworm so we can reasonably be explicit everywhere)
+	dpkgArch="$(dpkg --print-architecture)"; \
+	if [ "$dpkgArch" = 'arm64' ]; then \
+		apt-get install -y --no-install-recommends binutils-gold; \
+	fi; \
+	rm -rf /var/lib/apt/lists/*
+
+ENV GOLANG_VERSION 1.26rc1
+
+# don't auto-upgrade the gotoolchain
+# https://github.com/docker-library/golang/issues/472
+ENV GOTOOLCHAIN=local
+
+ENV GOPATH /go
+ENV PATH $GOPATH/bin:/usr/local/go/bin:$PATH
+# (see notes above about "COPY --link")
+COPY --from=build --link /target/ /
+RUN mkdir -p "$GOPATH/src" "$GOPATH/bin" && chmod -R 1777 "$GOPATH"
+WORKDIR $GOPATH
diff --git a/1.26-rc/windows/nanoserver-ltsc2022/Dockerfile b/1.26-rc/windows/nanoserver-ltsc2022/Dockerfile
new file mode 100644
index 00000000..bb205824
--- /dev/null
+++ b/1.26-rc/windows/nanoserver-ltsc2022/Dockerfile
@@ -0,0 +1,30 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
+FROM mcr.microsoft.com/windows/nanoserver:ltsc2022
+
+SHELL ["cmd", "/S", "/C"]
+
+# no Git installed (intentionally)
+#  -- Nano Server is "Windows Slim"
+
+# for 1.17+, we'll follow the (new) Go upstream default for install (https://golang.org/cl/283600), which frees up C:\go to be the default GOPATH and thus match the Linux images more closely (https://github.com/docker-library/golang/issues/288)
+ENV GOPATH C:\\go
+# HOWEVER, please note that it is the Go upstream intention to remove GOPATH support entirely: https://blog.golang.org/go116-module-changes
+
+# PATH isn't actually set in the Docker image, so we have to set it from within the container
+USER ContainerAdministrator
+RUN setx /m PATH "%GOPATH%\bin;C:\Program Files\Go\bin;%PATH%"
+USER ContainerUser
+# doing this first to share cache across versions more aggressively
+
+ENV GOLANG_VERSION 1.26rc1
+
+# Docker's Windows path parsing is absolutely *cursed*; please just trust me on this one -Tianon
+COPY --from=golang:1.26rc1-windowsservercore-ltsc2022 ["C:\\\\Program Files\\\\Go","C:\\\\Program Files\\\\Go"]
+RUN go version
+
+WORKDIR $GOPATH
diff --git a/1.26-rc/windows/nanoserver-ltsc2025/Dockerfile b/1.26-rc/windows/nanoserver-ltsc2025/Dockerfile
new file mode 100644
index 00000000..3bcf06ef
--- /dev/null
+++ b/1.26-rc/windows/nanoserver-ltsc2025/Dockerfile
@@ -0,0 +1,30 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
+FROM mcr.microsoft.com/windows/nanoserver:ltsc2025
+
+SHELL ["cmd", "/S", "/C"]
+
+# no Git installed (intentionally)
+#  -- Nano Server is "Windows Slim"
+
+# for 1.17+, we'll follow the (new) Go upstream default for install (https://golang.org/cl/283600), which frees up C:\go to be the default GOPATH and thus match the Linux images more closely (https://github.com/docker-library/golang/issues/288)
+ENV GOPATH C:\\go
+# HOWEVER, please note that it is the Go upstream intention to remove GOPATH support entirely: https://blog.golang.org/go116-module-changes
+
+# PATH isn't actually set in the Docker image, so we have to set it from within the container
+USER ContainerAdministrator
+RUN setx /m PATH "%GOPATH%\bin;C:\Program Files\Go\bin;%PATH%"
+USER ContainerUser
+# doing this first to share cache across versions more aggressively
+
+ENV GOLANG_VERSION 1.26rc1
+
+# Docker's Windows path parsing is absolutely *cursed*; please just trust me on this one -Tianon
+COPY --from=golang:1.26rc1-windowsservercore-ltsc2025 ["C:\\\\Program Files\\\\Go","C:\\\\Program Files\\\\Go"]
+RUN go version
+
+WORKDIR $GOPATH
diff --git a/1.26-rc/windows/windowsservercore-ltsc2022/Dockerfile b/1.26-rc/windows/windowsservercore-ltsc2022/Dockerfile
new file mode 100644
index 00000000..f93d7d18
--- /dev/null
+++ b/1.26-rc/windows/windowsservercore-ltsc2022/Dockerfile
@@ -0,0 +1,88 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
+FROM mcr.microsoft.com/windows/servercore:ltsc2022
+
+# $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
+SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
+
+# install MinGit (especially for "go get")
+# https://github.com/git-for-windows/git/wiki/MinGit
+# https://gitforwindows.org/
+# https://github.com/git-for-windows/git/releases
+# TODO in some future release, consider the BusyBox variant?  maybe only once https://github.com/git-for-windows/git/issues/1439 is officially closed?
+ENV GIT_VERSION 2.48.1
+ENV GIT_TAG v${GIT_VERSION}.windows.1
+ENV GIT_DOWNLOAD_URL https://github.com/git-for-windows/git/releases/download/${GIT_TAG}/MinGit-${GIT_VERSION}-64-bit.zip
+ENV GIT_DOWNLOAD_SHA256 11e8f462726827acccc7ecdad541f2544cbe5506d70fef4fa1ffac7c16288709
+# steps inspired by "chcolateyInstall.ps1" from "git.install" (https://chocolatey.org/packages/git.install)
+RUN Write-Host ('Downloading {0} ...' -f $env:GIT_DOWNLOAD_URL); \
+	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
+	Invoke-WebRequest -Uri $env:GIT_DOWNLOAD_URL -OutFile 'git.zip'; \
+	\
+	Write-Host ('Verifying sha256 ({0}) ...' -f $env:GIT_DOWNLOAD_SHA256); \
+	if ((Get-FileHash git.zip -Algorithm sha256).Hash -ne $env:GIT_DOWNLOAD_SHA256) { \
+		Write-Host 'FAILED!'; \
+		exit 1; \
+	}; \
+	\
+	Write-Host 'Expanding ...'; \
+	Expand-Archive -Path git.zip -DestinationPath C:\git\.; \
+	\
+	Write-Host 'Removing ...'; \
+	Remove-Item git.zip -Force; \
+	\
+	Write-Host 'Updating PATH ...'; \
+	$env:PATH = 'C:\git\cmd;C:\git\mingw64\bin;C:\git\usr\bin;' + $env:PATH; \
+	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
+	\
+	Write-Host 'Verifying install ("git version") ...'; \
+	git version; \
+	\
+	Write-Host 'Complete.';
+# https://blogs.msdn.microsoft.com/visualstudioalm/2016/09/03/whats-new-in-git-for-windows-2-10/
+# "Essentially, it is a Git for Windows that was stripped down as much as possible without sacrificing the functionality in which 3rd-party software may be interested."
+# "It currently requires only ~45MB on disk."
+
+# for 1.17+, we'll follow the (new) Go upstream default for install (https://golang.org/cl/283600), which frees up C:\go to be the default GOPATH and thus match the Linux images more closely (https://github.com/docker-library/golang/issues/288)
+ENV GOPATH C:\\go
+# HOWEVER, please note that it is the Go upstream intention to remove GOPATH support entirely: https://blog.golang.org/go116-module-changes
+
+# PATH isn't actually set in the Docker image, so we have to set it from within the container
+RUN $newPath = ('{0}\bin;C:\Program Files\Go\bin;{1}' -f $env:GOPATH, $env:PATH); \
+	Write-Host ('Updating PATH: {0}' -f $newPath); \
+	[Environment]::SetEnvironmentVariable('PATH', $newPath, [EnvironmentVariableTarget]::Machine);
+# doing this first to share cache across versions more aggressively
+
+ENV GOLANG_VERSION 1.26rc1
+
+RUN $url = 'https://dl.google.com/go/go1.26rc1.windows-amd64.zip'; \
+	Write-Host ('Downloading {0} ...' -f $url); \
+	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
+	Invoke-WebRequest -Uri $url -OutFile 'go.zip'; \
+	\
+	$sha256 = '9ed44ba3588e41c3f54dd6c5e1554a34b2fee35b811358edd29fefaad74e96bc'; \
+	Write-Host ('Verifying sha256 ({0}) ...' -f $sha256); \
+	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $sha256) { \
+		Write-Host 'FAILED!'; \
+		exit 1; \
+	}; \
+	\
+	Write-Host 'Expanding ...'; \
+	Expand-Archive go.zip -DestinationPath C:\; \
+	\
+	Write-Host 'Moving ...'; \
+	Move-Item -Path C:\go -Destination 'C:\Program Files\Go'; \
+	\
+	Write-Host 'Removing ...'; \
+	Remove-Item go.zip -Force; \
+	\
+	Write-Host 'Verifying install ("go version") ...'; \
+	go version; \
+	\
+	Write-Host 'Complete.';
+
+WORKDIR $GOPATH
diff --git a/1.26-rc/windows/windowsservercore-ltsc2025/Dockerfile b/1.26-rc/windows/windowsservercore-ltsc2025/Dockerfile
new file mode 100644
index 00000000..4a551005
--- /dev/null
+++ b/1.26-rc/windows/windowsservercore-ltsc2025/Dockerfile
@@ -0,0 +1,88 @@
+#
+# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
+#
+# PLEASE DO NOT EDIT IT DIRECTLY.
+#
+
+FROM mcr.microsoft.com/windows/servercore:ltsc2025
+
+# $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
+SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
+
+# install MinGit (especially for "go get")
+# https://github.com/git-for-windows/git/wiki/MinGit
+# https://gitforwindows.org/
+# https://github.com/git-for-windows/git/releases
+# TODO in some future release, consider the BusyBox variant?  maybe only once https://github.com/git-for-windows/git/issues/1439 is officially closed?
+ENV GIT_VERSION 2.48.1
+ENV GIT_TAG v${GIT_VERSION}.windows.1
+ENV GIT_DOWNLOAD_URL https://github.com/git-for-windows/git/releases/download/${GIT_TAG}/MinGit-${GIT_VERSION}-64-bit.zip
+ENV GIT_DOWNLOAD_SHA256 11e8f462726827acccc7ecdad541f2544cbe5506d70fef4fa1ffac7c16288709
+# steps inspired by "chcolateyInstall.ps1" from "git.install" (https://chocolatey.org/packages/git.install)
+RUN Write-Host ('Downloading {0} ...' -f $env:GIT_DOWNLOAD_URL); \
+	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
+	Invoke-WebRequest -Uri $env:GIT_DOWNLOAD_URL -OutFile 'git.zip'; \
+	\
+	Write-Host ('Verifying sha256 ({0}) ...' -f $env:GIT_DOWNLOAD_SHA256); \
+	if ((Get-FileHash git.zip -Algorithm sha256).Hash -ne $env:GIT_DOWNLOAD_SHA256) { \
+		Write-Host 'FAILED!'; \
+		exit 1; \
+	}; \
+	\
+	Write-Host 'Expanding ...'; \
+	Expand-Archive -Path git.zip -DestinationPath C:\git\.; \
+	\
+	Write-Host 'Removing ...'; \
+	Remove-Item git.zip -Force; \
+	\
+	Write-Host 'Updating PATH ...'; \
+	$env:PATH = 'C:\git\cmd;C:\git\mingw64\bin;C:\git\usr\bin;' + $env:PATH; \
+	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
+	\
+	Write-Host 'Verifying install ("git version") ...'; \
+	git version; \
+	\
+	Write-Host 'Complete.';
+# https://blogs.msdn.microsoft.com/visualstudioalm/2016/09/03/whats-new-in-git-for-windows-2-10/
+# "Essentially, it is a Git for Windows that was stripped down as much as possible without sacrificing the functionality in which 3rd-party software may be interested."
+# "It currently requires only ~45MB on disk."
+
+# for 1.17+, we'll follow the (new) Go upstream default for install (https://golang.org/cl/283600), which frees up C:\go to be the default GOPATH and thus match the Linux images more closely (https://github.com/docker-library/golang/issues/288)
+ENV GOPATH C:\\go
+# HOWEVER, please note that it is the Go upstream intention to remove GOPATH support entirely: https://blog.golang.org/go116-module-changes
+
+# PATH isn't actually set in the Docker image, so we have to set it from within the container
+RUN $newPath = ('{0}\bin;C:\Program Files\Go\bin;{1}' -f $env:GOPATH, $env:PATH); \
+	Write-Host ('Updating PATH: {0}' -f $newPath); \
+	[Environment]::SetEnvironmentVariable('PATH', $newPath, [EnvironmentVariableTarget]::Machine);
+# doing this first to share cache across versions more aggressively
+
+ENV GOLANG_VERSION 1.26rc1
+
+RUN $url = 'https://dl.google.com/go/go1.26rc1.windows-amd64.zip'; \
+	Write-Host ('Downloading {0} ...' -f $url); \
+	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
+	Invoke-WebRequest -Uri $url -OutFile 'go.zip'; \
+	\
+	$sha256 = '9ed44ba3588e41c3f54dd6c5e1554a34b2fee35b811358edd29fefaad74e96bc'; \
+	Write-Host ('Verifying sha256 ({0}) ...' -f $sha256); \
+	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $sha256) { \
+		Write-Host 'FAILED!'; \
+		exit 1; \
+	}; \
+	\
+	Write-Host 'Expanding ...'; \
+	Expand-Archive go.zip -DestinationPath C:\; \
+	\
+	Write-Host 'Moving ...'; \
+	Move-Item -Path C:\go -Destination 'C:\Program Files\Go'; \
+	\
+	Write-Host 'Removing ...'; \
+	Remove-Item go.zip -Force; \
+	\
+	Write-Host 'Verifying install ("go version") ...'; \
+	go version; \
+	\
+	Write-Host 'Complete.';
+
+WORKDIR $GOPATH
diff --git a/versions.json b/versions.json
index e64c1044..f916d1ce 100644
--- a/versions.json
+++ b/versions.json
@@ -1,4 +1,398 @@
 {
+  "1.26-rc": {
+    "version": "1.26rc1",
+    "arches": {
+      "aix-ppc64": {
+        "url": "https://dl.google.com/go/go1.26rc1.aix-ppc64.tar.gz",
+        "sha256": "4f5b811e2ae0aa097f3361ee17a2ae3f6b3c49c41e38c8af72faba5eb59f3d92",
+        "env": {
+          "GOOS": "aix",
+          "GOARCH": "ppc64"
+        },
+        "supported": false
+      },
+      "amd64": {
+        "url": "https://dl.google.com/go/go1.26rc1.linux-amd64.tar.gz",
+        "sha256": "b395b5d51d45cf2a19e61855edd7bafaa2dfeaafaf8d9649cb3262fd8b81a96a",
+        "env": {
+          "GOOS": "linux",
+          "GOARCH": "amd64",
+          "GOAMD64": "v1"
+        },
+        "supported": true
+      },
+      "arm32v5": {
+        "env": {
+          "GOOS": "linux",
+          "GOARCH": "arm",
+          "GOARM": "5"
+        },
+        "supported": false
+      },
+      "arm32v6": {
+        "url": "https://dl.google.com/go/go1.26rc1.linux-armv6l.tar.gz",
+        "sha256": "53cb2acc73ae9fe6ca1c94c6798abcdf3ed879202f9bd968f6e1ab0aa23b8212",
+        "env": {
+          "GOOS": "linux",
+          "GOARCH": "arm",
+          "GOARM": "6"
+        },
+        "supported": true
+      },
+      "arm32v7": {
+        "url": "https://dl.google.com/go/go1.26rc1.linux-armv6l.tar.gz",
+        "sha256": "53cb2acc73ae9fe6ca1c94c6798abcdf3ed879202f9bd968f6e1ab0aa23b8212",
+        "env": {
+          "GOOS": "linux",
+          "GOARCH": "arm",
+          "GOARM": "7"
+        },
+        "supported": true
+      },
+      "arm64v8": {
+        "url": "https://dl.google.com/go/go1.26rc1.linux-arm64.tar.gz",
+        "sha256": "b254925e2bc55467595e9d9b15a4f61a9102d763a92a972c853e471f0e8365a9",
+        "env": {
+          "GOOS": "linux",
+          "GOARCH": "arm64",
+          "GOARM64": "v8.0"
+        },
+        "supported": true
+      },
+      "darwin-amd64": {
+        "url": "https://dl.google.com/go/go1.26rc1.darwin-amd64.tar.gz",
+        "sha256": "c76b80ef28866b653f94525c79425e8dd19b9afbca54fffa7e02ecb1c49d465b",
+        "env": {
+          "GOOS": "darwin",
+          "GOARCH": "amd64"
+        },
+        "supported": false
+      },
+      "darwin-arm64v8": {
+        "url": "https://dl.google.com/go/go1.26rc1.darwin-arm64.tar.gz",
+        "sha256": "f5b40648e5a1a6d1b078628d63f1feb928b76d8f43b78166532c03f53715ff4d",
+        "env": {
+          "GOOS": "darwin",
+          "GOARCH": "arm64"
+        },
+        "supported": false
+      },
+      "dragonfly-amd64": {
+        "url": "https://dl.google.com/go/go1.26rc1.dragonfly-amd64.tar.gz",
+        "sha256": "7718ef3b7f95fbc66b842eb49363a88d28ba1050c7357891e923b340a4cd0541",
+        "env": {
+          "GOOS": "dragonfly",
+          "GOARCH": "amd64"
+        },
+        "supported": false
+      },
+      "freebsd-amd64": {
+        "url": "https://dl.google.com/go/go1.26rc1.freebsd-amd64.tar.gz",
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