diff --git a/.buildkite/pipeline.yml b/.buildkite/pipeline.yml
index 8411a7f18..e3592479b 100644
--- a/.buildkite/pipeline.yml
+++ b/.buildkite/pipeline.yml
@@ -12,9 +12,7 @@ steps:
     if: build.branch != "main"
     command: buildkite-agent pipeline upload .buildkite/x86-cpu-debug-tests.yml
 
-  # Main-branch publish: build → on-hardware ctest → push to higherordermethods/self
-  # on Docker Hub. Covers MI210 (gfx90a), V100 (sm70), and x86 CPU. B200/B300
-  # (sm100) is published from GitHub Actions because we have no Blackwell agent.
-  - label: ":pipeline: Release & Publish"
-    if: build.branch == "main"
-    command: buildkite-agent pipeline upload .buildkite/release-and-publish.yml
+  # Main-branch release images (MI210/gfx90a, V100/sm70, x86 CPU, and the
+  # Blackwell sm100/sm103 targets) are built and pushed from GitHub Actions
+  # (.github/workflows/docker-publish.yml). Buildkite only runs the on-hardware
+  # GPU coverage tests on pull-request branches above.
diff --git a/.buildkite/release-and-publish.yml b/.buildkite/release-and-publish.yml
deleted file mode 100644
index 7d6d07de2..000000000
--- a/.buildkite/release-and-publish.yml
+++ /dev/null
@@ -1,152 +0,0 @@
-steps:
-  # ---- AMD MI210 (gfx90a) Release ----
-  - label: ":docker: Build Release Image (x86-rocm643-gfx90a)"
-    key: "docker-build-gfx90a"
-    command: |
-      SELFISH_IMAGE="higherordermethods/selfish:latest-x86-rocm643-gfx90a"
-      docker pull "$${SELFISH_IMAGE}"
-      SELFISH_SHA=$$(docker inspect --format='{{index .RepoDigests 0}}' "$${SELFISH_IMAGE}" | cut -d@ -f2)
-      docker build \
-        --build-arg SELFISH_IMAGE="$${SELFISH_IMAGE}" \
-        --build-arg SELFISH_SHA="$${SELFISH_SHA}" \
-        -t higherordermethods/self:$${BUILDKITE_BUILD_NUMBER}-x86-rocm643-gfx90a \
-        -t higherordermethods/self:latest-x86-rocm643-gfx90a \
-        -f docker/x86_gfx90a/Dockerfile .
-    env:
-      slurm_nodelist: "noether"
-    agents:
-      queue: "galapagos"
-
-  - label: ":test_tube: Test Release Image (x86-rocm643-gfx90a)"
-    key: "test-release-gfx90a"
-    depends_on: "docker-build-gfx90a"
-    command: |
-      source /opt/spack-environment/activate.sh
-      ctest --test-dir /opt/self/build --output-on-failure
-    env:
-      slurm_partition: "main"
-      slurm_gres: "gpu:mi210:2"
-      slurm_time: "01:00:00"
-      slurm_nodes: 1
-      slurm_ntasks: 2
-      slurm_cpus_per_task: 8
-      slurm_container_image: "docker://higherordermethods/self:$${BUILDKITE_BUILD_NUMBER}-x86-rocm643-gfx90a"
-    agents:
-      queue: "galapagos"
-
-  - label: ":rocket: Push Release Image (x86-rocm643-gfx90a)"
-    key: "push-release-gfx90a"
-    depends_on: "test-release-gfx90a"
-    command: |
-      echo "$${DOCKERHUB_TOKEN}" | docker login -u "$${DOCKERHUB_USERNAME}" --password-stdin
-      docker push higherordermethods/self:$${BUILDKITE_BUILD_NUMBER}-x86-rocm643-gfx90a
-      docker push higherordermethods/self:latest-x86-rocm643-gfx90a
-      docker logout
-    secrets:
-      - DOCKERHUB_USERNAME
-      - DOCKERHUB_TOKEN
-    env:
-      slurm_nodelist: "noether"
-    agents:
-      queue: "galapagos"
-
-  # ---- NVIDIA V100 (sm70) Release ----
-  - label: ":docker: Build Release Image (x86-cuda124-sm70)"
-    key: "docker-build-sm70"
-    command: |
-      SELFISH_IMAGE="higherordermethods/selfish:latest-x86-cuda124-sm70"
-      docker pull "$${SELFISH_IMAGE}"
-      SELFISH_SHA=$$(docker inspect --format='{{index .RepoDigests 0}}' "$${SELFISH_IMAGE}" | cut -d@ -f2)
-      docker build \
-        --build-arg SELFISH_IMAGE="$${SELFISH_IMAGE}" \
-        --build-arg SELFISH_SHA="$${SELFISH_SHA}" \
-        -t higherordermethods/self:$${BUILDKITE_BUILD_NUMBER}-x86-cuda124-sm70 \
-        -t higherordermethods/self:latest-x86-cuda124-sm70 \
-        -f docker/x86_sm70/Dockerfile .
-    env:
-      slurm_nodelist: "oram"
-    agents:
-      queue: "galapagos"
-
-  - label: ":test_tube: Test Release Image (x86-cuda124-sm70)"
-    key: "test-release-sm70"
-    depends_on: "docker-build-sm70"
-    command: |
-      source /opt/spack-environment/activate.sh
-      ctest --test-dir /opt/self/build --output-on-failure
-    env:
-      slurm_partition: "main"
-      slurm_gres: "gpu:v100:2"
-      slurm_time: "01:00:00"
-      slurm_nodes: 1
-      slurm_ntasks: 2
-      slurm_cpus_per_task: 8
-      slurm_container_image: "docker://higherordermethods/self:$${BUILDKITE_BUILD_NUMBER}-x86-cuda124-sm70"
-    agents:
-      queue: "galapagos"
-
-  - label: ":rocket: Push Release Image (x86-cuda124-sm70)"
-    key: "push-release-sm70"
-    depends_on: "test-release-sm70"
-    command: |
-      echo "$${DOCKERHUB_TOKEN}" | docker login -u "$${DOCKERHUB_USERNAME}" --password-stdin
-      docker push higherordermethods/self:$${BUILDKITE_BUILD_NUMBER}-x86-cuda124-sm70
-      docker push higherordermethods/self:latest-x86-cuda124-sm70
-      docker logout
-    secrets:
-      - DOCKERHUB_USERNAME
-      - DOCKERHUB_TOKEN
-    env:
-      slurm_nodelist: "oram"
-    agents:
-      queue: "galapagos"
-
-  # ---- x86 CPU-only Release ----
-  - label: ":docker: Build Release Image (x86)"
-    key: "docker-build-x86"
-    command: |
-      SELFISH_IMAGE="higherordermethods/selfish:latest-x86"
-      docker pull "$${SELFISH_IMAGE}"
-      SELFISH_SHA=$$(docker inspect --format='{{index .RepoDigests 0}}' "$${SELFISH_IMAGE}" | cut -d@ -f2)
-      docker build \
-        --build-arg SELFISH_IMAGE="$${SELFISH_IMAGE}" \
-        --build-arg SELFISH_SHA="$${SELFISH_SHA}" \
-        -t higherordermethods/self:$${BUILDKITE_BUILD_NUMBER}-x86 \
-        -t higherordermethods/self:latest-x86 \
-        -f docker/x86/Dockerfile .
-    env:
-      slurm_nodelist: "oram"
-    agents:
-      queue: "galapagos"
-
-  - label: ":test_tube: Test Release Image (x86)"
-    key: "test-release-x86"
-    depends_on: "docker-build-x86"
-    command: |
-      source /opt/spack-environment/activate.sh
-      ctest --test-dir /opt/self/build --output-on-failure
-    env:
-      slurm_partition: "main"
-      slurm_time: "01:00:00"
-      slurm_nodes: 1
-      slurm_ntasks: 2
-      slurm_cpus_per_task: 8
-      slurm_container_image: "docker://higherordermethods/self:$${BUILDKITE_BUILD_NUMBER}-x86"
-    agents:
-      queue: "galapagos"
-
-  - label: ":rocket: Push Release Image (x86)"
-    key: "push-release-x86"
-    depends_on: "test-release-x86"
-    command: |
-      echo "$${DOCKERHUB_TOKEN}" | docker login -u "$${DOCKERHUB_USERNAME}" --password-stdin
-      docker push higherordermethods/self:$${BUILDKITE_BUILD_NUMBER}-x86
-      docker push higherordermethods/self:latest-x86
-      docker logout
-    secrets:
-      - DOCKERHUB_USERNAME
-      - DOCKERHUB_TOKEN
-    env:
-      slurm_nodelist: "oram"
-    agents:
-      queue: "galapagos"
diff --git a/.github/workflows/docker-publish.yml b/.github/workflows/docker-publish.yml
index e493f68b8..7c7d256f1 100644
--- a/.github/workflows/docker-publish.yml
+++ b/.github/workflows/docker-publish.yml
@@ -26,6 +26,16 @@ jobs:
       fail-fast: false
       matrix:
         include:
+          - variant: x86-cuda124-sm70
+            context: docker/x86_sm70
+            selfish_image: higherordermethods/selfish:latest-x86-cuda124-sm70
+            tag_suffix: x86-cuda124-sm70
+            double_precision: "ON"
+          - variant: x86-cuda124-sm70-sp
+            context: docker/x86_sm70
+            selfish_image: higherordermethods/selfish:latest-x86-cuda124-sm70
+            tag_suffix: x86-cuda124-sm70-sp
+            double_precision: "OFF"
           - variant: x86-cuda130-sm100
             context: docker/x86_sm100
             selfish_image: higherordermethods/selfish:latest-x86-cuda130-sm100
@@ -66,6 +76,16 @@ jobs:
             selfish_image: higherordermethods/selfish:latest-x86-rocm643-gfx942
             tag_suffix: x86-rocm643-gfx942-sp
             double_precision: "OFF"
+          - variant: x86
+            context: docker/x86
+            selfish_image: higherordermethods/selfish:latest-x86-none
+            tag_suffix: x86
+            double_precision: "ON"
+          - variant: x86-sp
+            context: docker/x86
+            selfish_image: higherordermethods/selfish:latest-x86-none
+            tag_suffix: x86-sp
+            double_precision: "OFF"
 
     steps:
       - name: Checkout repository
diff --git a/docker/x86/Dockerfile b/docker/x86/Dockerfile
index b20814dc6..745daca70 100644
--- a/docker/x86/Dockerfile
+++ b/docker/x86/Dockerfile
@@ -1,10 +1,14 @@
-ARG SELFISH_IMAGE=higherordermethods/selfish:latest-x86
+ARG SELFISH_IMAGE=higherordermethods/selfish:latest-x86-none
 FROM ${SELFISH_IMAGE}
 
 ARG SELFISH_SHA=""
 LABEL org.opencontainers.image.base.name="${SELFISH_IMAGE}"
 LABEL org.opencontainers.image.base.digest="${SELFISH_SHA}"
 
+# Floating-point precision of the build. ON -> double precision (default),
+# OFF -> single precision. Maps to the SELF_ENABLE_DOUBLE_PRECISION CMake option.
+ARG SELF_DOUBLE_PRECISION=ON
+
 COPY . /opt/self/src
 
 RUN source /opt/spack-environment/activate.sh && \
@@ -15,6 +19,7 @@ RUN source /opt/spack-environment/activate.sh && \
       -DCMAKE_BUILD_TYPE=Release \
       -DSELF_ENABLE_GPU=OFF \
       -DSELF_ENABLE_TESTING=ON \
+      -DSELF_ENABLE_DOUBLE_PRECISION=${SELF_DOUBLE_PRECISION} \
       -DSELF_ENABLE_EXAMPLES=ON \
       /opt/self/src && \
     make -j$(nproc) && \
diff --git a/docker/x86_sm70/Dockerfile b/docker/x86_sm70/Dockerfile
index f8c7d8daf..9ce541d36 100644
--- a/docker/x86_sm70/Dockerfile
+++ b/docker/x86_sm70/Dockerfile
@@ -5,6 +5,10 @@ ARG SELFISH_SHA=""
 LABEL org.opencontainers.image.base.name="${SELFISH_IMAGE}"
 LABEL org.opencontainers.image.base.digest="${SELFISH_SHA}"
 
+# Floating-point precision of the build. ON -> double precision (default),
+# OFF -> single precision. Maps to the SELF_ENABLE_DOUBLE_PRECISION CMake option.
+ARG SELF_DOUBLE_PRECISION=ON
+
 COPY . /opt/self/src
 
 RUN source /opt/spack-environment/activate.sh && \
@@ -16,6 +20,7 @@ RUN source /opt/spack-environment/activate.sh && \
       -DSELF_ENABLE_GPU=ON \
       -DSELF_GPU_BACKEND=CUDA \
       -DSELF_ENABLE_TESTING=ON \
+      -DSELF_ENABLE_DOUBLE_PRECISION=${SELF_DOUBLE_PRECISION} \
       -DCMAKE_CUDA_ARCHITECTURES="70" \
       -DSELF_ENABLE_EXAMPLES=ON \
       /opt/self/src && \