From 0e0877fef9bc0cbab0a26f863a729cee90975bc7 Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 10:26:21 +0100
Subject: [PATCH 01/19] Fix version setting for CORSIKA configuration repo

---
 docker/Dockerfile-corsika7 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docker/Dockerfile-corsika7 b/docker/Dockerfile-corsika7
index 701d71c35c..06485dfbd8 100644
--- a/docker/Dockerfile-corsika7
+++ b/docker/Dockerfile-corsika7
@@ -39,7 +39,7 @@ WORKDIR /src
 
 # Clone CORSIKA configuration files from CTAO gitlab
 RUN git config --global advice.detachedHead false && \
-    git clone --depth 1 --branch "${CORSIKA_VERSION}" "http://${CORSIKA_CONFIG_REPO}" && \
+    git clone --depth 1 --branch "${CORSIKA_CONFIG_VERSION}" "http://${CORSIKA_CONFIG_REPO}" && \
     cp -v corsika7-config/config/${CORSIKA_VERSION}/*.h . && \
     rm -rf corsika7-config
 

From 62cc589e29a26ae67a46e81f5ce42ff17050bab3 Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 10:44:08 +0100
Subject: [PATCH 02/19] add simtel versions to image tag

---
 .github/workflows/build-sim_telarray.yml | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/build-sim_telarray.yml b/.github/workflows/build-sim_telarray.yml
index a0f4c2f62b..df8086c468 100644
--- a/.github/workflows/build-sim_telarray.yml
+++ b/.github/workflows/build-sim_telarray.yml
@@ -32,7 +32,7 @@ jobs:
           - {build_opt: 'prod6-baseline', extra_def: '-DMAXIMUM_TELESCOPES=99'}
 
     env:
-      BASE_LABELS: "simtel-${{ matrix.version.simtel_version }}-${{ matrix.production.build_opt }}"
+      BASE_LABELS: "simtel-${{ matrix.production.build_opt }}"
 
     steps:
       - name: Checkout repository
@@ -54,9 +54,10 @@ jobs:
         with:
           tags: |
             type=ref,event=pr
-            type=semver,pattern={{major}}.{{minor}}.{{patch}}
-            type=schedule,pattern={{date 'YYYYMMDD'}}
+            type=semver,pattern={{major}}.{{minor}}.{{patch}}-simtel-${{ matrix.version.simtel_version }}
+            type=schedule,pattern={{date 'YYYYMMDD'}}-simtel-${{ matrix.version.simtel_version }}
             type=raw,value={{date 'YYYYMMDD-HHmmss'}}
+            type=raw,value=simtel-${{ matrix.version.simtel_version }}
           images: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABELS }}
           flavor: latest=true
 

From 7a4954920e451d1e33453092019f37365ce0954f Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 10:59:36 +0100
Subject: [PATCH 03/19] base tags

---
 .github/workflows/build-corsika7.yml     | 15 ++++++++-------
 .github/workflows/build-sim_telarray.yml | 16 ++++++++--------
 2 files changed, 16 insertions(+), 15 deletions(-)

diff --git a/.github/workflows/build-corsika7.yml b/.github/workflows/build-corsika7.yml
index 5161f7d964..d6458639df 100644
--- a/.github/workflows/build-corsika7.yml
+++ b/.github/workflows/build-corsika7.yml
@@ -50,7 +50,8 @@ jobs:
           - {corsika_version: '78010', avx_instruction: 'sse4'}
 
     env:
-      BASE_LABELS: "corsika7-${{ matrix.version.corsika_version }}-${{ matrix.version.avx_instruction }}"
+      BASE_LABEL: "corsika7"
+      BASE_TAG: "${{ matrix.version.corsika_version }}-${{ matrix.version.avx_instruction }}"
 
     steps:
       - name: Checkout repository
@@ -77,11 +78,11 @@ jobs:
         uses: docker/metadata-action@v5
         with:
           tags: |
-            type=ref,event=pr
-            type=semver,pattern={{major}}.{{minor}}.{{patch}}
-            type=schedule,pattern={{date 'YYYYMMDD'}}
-            type=raw,value={{date 'YYYYMMDD-HHmmss'}}
-          images: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABELS }}
+            type=ref,event=pr,suffix=-${{ env.BASE_TAG }}
+            type=semver,pattern={{major}}.{{minor}}.{{patch}}-${{ env.BASE_TAG }}
+            type=schedule,pattern={{date 'YYYYMMDD'}}-${{ env.BASE_TAG }}
+            type=raw,value={{date 'YYYYMMDD-HHmmss'}}-${{ env.BASE_TAG }}
+          images: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABEL }}
           flavor: latest=true
 
       - name: Build and push
@@ -102,5 +103,5 @@ jobs:
 
       - name: Output image information
         run: |
-          echo "Built base image: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABELS }}:latest"
+          echo "Built base image: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABEL }}:latest"
           echo "Image tags: ${{ steps.meta-base.outputs.tags }}"
diff --git a/.github/workflows/build-sim_telarray.yml b/.github/workflows/build-sim_telarray.yml
index df8086c468..61b52d1e91 100644
--- a/.github/workflows/build-sim_telarray.yml
+++ b/.github/workflows/build-sim_telarray.yml
@@ -32,7 +32,8 @@ jobs:
           - {build_opt: 'prod6-baseline', extra_def: '-DMAXIMUM_TELESCOPES=99'}
 
     env:
-      BASE_LABELS: "simtel-${{ matrix.production.build_opt }}"
+      BASE_LABEL: "simtel-${{ matrix.production.build_opt }}"
+      BASE_TAG: "simtel-${{ matrix.version.simtel_version }}"
 
     steps:
       - name: Checkout repository
@@ -53,12 +54,11 @@ jobs:
         uses: docker/metadata-action@v5
         with:
           tags: |
-            type=ref,event=pr
-            type=semver,pattern={{major}}.{{minor}}.{{patch}}-simtel-${{ matrix.version.simtel_version }}
-            type=schedule,pattern={{date 'YYYYMMDD'}}-simtel-${{ matrix.version.simtel_version }}
-            type=raw,value={{date 'YYYYMMDD-HHmmss'}}
-            type=raw,value=simtel-${{ matrix.version.simtel_version }}
-          images: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABELS }}
+            type=ref,event=pr,suffix=-${{ env.BASE_TAG }}
+            type=semver,pattern={{major}}.{{minor}}.{{patch}}-${{ env.BASE_TAG }}
+            type=schedule,pattern={{date 'YYYYMMDD'}}-${{ env.BASE_TAG }}
+            type=raw,value={{date 'YYYYMMDD-HHmmss'}}-${{ env.BASE_TAG }}
+          images: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABEL }}
           flavor: latest=true
 
       - name: Build /sim_telarray image
@@ -82,5 +82,5 @@ jobs:
 
       - name: Output image information
         run: |
-          echo "Built base image: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABELS }}:latest"
+          echo "Built base image: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABEL }}:latest"
           echo "Image tags: ${{ steps.meta-base.outputs.tags }}"

From 921ceb2a9eead2c1ee294540931bebdd79a4b509 Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 11:15:43 +0100
Subject: [PATCH 04/19] Docker files prod improvement and tagging

---
 .github/workflows/build-corsika7.yml        |  3 +-
 .github/workflows/build-simtools-dev.yml    | 10 +++---
 .github/workflows/build-simtools-legacy.yml |  6 ++--
 docker/Dockerfile-simtools-dev              | 19 ++++-------
 docker/Dockerfile-simtools-legacy           | 14 ++++----
 docker/Dockerfile-simtools-prod             | 37 ++++++++-------------
 6 files changed, 38 insertions(+), 51 deletions(-)

diff --git a/.github/workflows/build-corsika7.yml b/.github/workflows/build-corsika7.yml
index d6458639df..2ef30f37a8 100644
--- a/.github/workflows/build-corsika7.yml
+++ b/.github/workflows/build-corsika7.yml
@@ -4,6 +4,7 @@ name: build-corsika7
 # The no_opt (non-optimized) images are built as multi-platform images (x86_64 and arm64).
 #
 # The images are built and pushed when manually triggered (workflow_dispatch).
+#
 
 on:
   workflow_dispatch:
@@ -83,7 +84,7 @@ jobs:
             type=schedule,pattern={{date 'YYYYMMDD'}}-${{ env.BASE_TAG }}
             type=raw,value={{date 'YYYYMMDD-HHmmss'}}-${{ env.BASE_TAG }}
           images: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABEL }}
-          flavor: latest=true
+          flavor: latest=false
 
       - name: Build and push
         uses: docker/build-push-action@v6
diff --git a/.github/workflows/build-simtools-dev.yml b/.github/workflows/build-simtools-dev.yml
index b47d9268f3..3e8ff7aafb 100644
--- a/.github/workflows/build-simtools-dev.yml
+++ b/.github/workflows/build-simtools-dev.yml
@@ -57,11 +57,11 @@ jobs:
       - name: Set build arguments (correct branch)
         run: |
           if [[ "${{ github.event_name }}" == 'pull_request' ]]; then
-            echo "BUILD_BRANCH=${GITHUB_HEAD_REF}" >> "$GITHUB_ENV"
+            echo "SIMTOOLS_BRANCH=${GITHUB_HEAD_REF}" >> "$GITHUB_ENV"
           else
-            echo "BUILD_BRANCH=${GITHUB_REF#refs/heads/}" >> "$GITHUB_ENV"
+            echo "SIMTOOLS_BRANCH=${GITHUB_REF#refs/heads/}" >> "$GITHUB_ENV"
           fi
-          echo "BUILD BRANCH ${{ env.BUILD_BRANCH }}"
+          echo "BUILD BRANCH ${{ env.SIMTOOLS_BRANCH }}"
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
@@ -92,7 +92,7 @@ jobs:
         uses: docker/build-push-action@v6
         with:
           context: .
-          build-args: BUILD_BRANCH=${{ env.BUILD_BRANCH }}
+          build-args: SIMTOOLS_BRANCH=${{ env.SIMTOOLS_BRANCH }}
           load: true
           file: ./docker/Dockerfile-simtools-${{ matrix.type }}
           tags: ${{ env.TEST_TAG }}
@@ -102,7 +102,7 @@ jobs:
         with:
           context: .
           platforms: linux/amd64,linux/arm64/v8
-          build-args: BUILD_BRANCH=${{ env.BUILD_BRANCH }}
+          build-args: SIMTOOLS_BRANCH=${{ env.SIMTOOLS_BRANCH }}
           push: ${{ github.event_name == 'release' || github.ref == 'refs/heads/main' || github.event_name == 'workflow_dispatch' }}
           file: ./docker/Dockerfile-simtools-${{ matrix.type }}
           tags: ${{ steps.meta.outputs.tags }}
diff --git a/.github/workflows/build-simtools-legacy.yml b/.github/workflows/build-simtools-legacy.yml
index 91f71ec900..cfbda395a2 100644
--- a/.github/workflows/build-simtools-legacy.yml
+++ b/.github/workflows/build-simtools-legacy.yml
@@ -55,9 +55,9 @@ jobs:
       - name: Set build branch
         run: |
           if [[ "${{ github.event_name }}" == 'pull_request' ]]; then
-            echo "BUILD_BRANCH=${GITHUB_HEAD_REF}" >> "$GITHUB_ENV"
+            echo "SIMTOOLS_BRANCH=${GITHUB_HEAD_REF}" >> "$GITHUB_ENV"
           else
-            echo "BUILD_BRANCH=${GITHUB_REF#refs/heads/}" >> "$GITHUB_ENV"
+            echo "SIMTOOLS_BRANCH=${GITHUB_REF#refs/heads/}" >> "$GITHUB_ENV"
           fi
 
       - name: Set up Docker Buildx
@@ -89,7 +89,7 @@ jobs:
           platforms: linux/amd64
           build-args: |
             BASE_IMAGE=${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABELS }}:latest
-            BUILD_BRANCH=${{ env.BUILD_BRANCH }}
+            SIMTOOLS_BRANCH=${{ env.SIMTOOLS_BRANCH }}
           push: ${{ github.event_name == 'release' || github.event.pull_request.merged == true || github.event_name == 'workflow_dispatch' }}
           file: ./docker/Dockerfile-simtools-legacy
           tags: ${{ steps.meta-simtools.outputs.tags }}
diff --git a/docker/Dockerfile-simtools-dev b/docker/Dockerfile-simtools-dev
index 2a57b14109..ef0edab001 100644
--- a/docker/Dockerfile-simtools-dev
+++ b/docker/Dockerfile-simtools-dev
@@ -1,6 +1,6 @@
 # Dockerfile for simtools development.
 #
-# Uses CORSIKA (no vector optimization) and sim_telarray images.
+# Uses CORSIKA (no vector optimization) and sim_telarray pre-built images.
 #
 # Minimal CORSIKA version is 7.8x (otherwise QGSJet-II tables need to be added)
 #
@@ -11,26 +11,21 @@
 # hadolint global ignore=DL3013,DL3041
 # - DL3013, DL3041: ignore warnings about using latest
 
-ARG CORSIKA_VERSION="78010"
-ARG CORSIKA_IMAGE_VERSION="latest"
-ARG SIMTEL_VERSION="251124"
+ARG CORSIKA_IMAGE_VERSION="pr-1954-78010"
 ARG SIMTEL_BUILD_OPT="prod6-baseline"
 ARG SIMTEL_IMAGE_VERSION="latest"
 ARG AVX_INSTRUCTION="no_opt"
-ARG PYTHON_VERSION="3.12"
-ARG SIMTOOLS_REQUIREMENT="https://github.com/gammasim/simtools.git"
+ARG PYTHON_VERSION="3.13"
+ARG SIMTOOLS_REPO="https://github.com/gammasim/simtools.git"
 
-FROM ghcr.io/gammasim/corsika7-${CORSIKA_VERSION}-${AVX_INSTRUCTION}:${CORSIKA_IMAGE_VERSION} AS corsika_img
-FROM ghcr.io/gammasim/simtel-${SIMTEL_VERSION}-${SIMTEL_BUILD_OPT}:${SIMTEL_IMAGE_VERSION} AS simtel_img
+FROM ghcr.io/gammasim/corsika7:${CORSIKA_IMAGE_VERSION}-${AVX_INSTRUCTION} AS corsika_img
+FROM ghcr.io/gammasim/simtel-${SIMTEL_BUILD_OPT}:${SIMTEL_IMAGE_VERSION} AS simtel_img
 
 FROM almalinux:9.5-minimal
 ARG PYTHON_VERSION
-ARG SIMTOOLS_REQUIREMENT
+ARG SIMTOOLS_REPO
 
-# Copy CORSIKA from corsika image
 COPY --from=corsika_img /workdir/simulation_software/corsika7  /workdir/simulation_software/corsika7
-
-# Copy sim_telarray components from simtel image
 COPY --from=simtel_img /workdir/simulation_software/sim_telarray /workdir/simulation_software/sim_telarray
 COPY --from=simtel_img /workdir/simulation_software/hessioxxx /workdir/simulation_software/hessioxxx
 COPY --from=simtel_img /workdir/simulation_software/stdtools /workdir/simulation_software/stdtools
diff --git a/docker/Dockerfile-simtools-legacy b/docker/Dockerfile-simtools-legacy
index 24ab0cb4fc..bbf6187a72 100644
--- a/docker/Dockerfile-simtools-legacy
+++ b/docker/Dockerfile-simtools-legacy
@@ -10,13 +10,13 @@
 # - SC1091: ignore warning about not being able to source the bashrc
 
 ARG BASE_IMAGE
-ARG BUILD_BRANCH=main
-ARG SIMTOOLS_REQUIREMENT="https://github.com/gammasim/simtools.git"
+ARG SIMTOOLS_BRANCH=main
+ARG SIMTOOLS_REPO="https://github.com/gammasim/simtools.git"
 ARG PYTHON_VERSION=3.12
 
 FROM ${BASE_IMAGE}
-ARG BUILD_BRANCH
-ARG SIMTOOLS_REQUIREMENT
+ARG SIMTOOLS_BRANCH
+ARG SIMTOOLS_REPO
 ARG PYTHON_VERSION
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
@@ -28,12 +28,12 @@ RUN microdnf update -y && microdnf install -y \
     rm -rf /var/cache/dnf/* /tmp/* /var/tmp/* && \
     ln -sf /usr/bin/python${PYTHON_VERSION} /usr/bin/python
 
-RUN BUILD_BRANCH=${BUILD_BRANCH//refs\/tags\//} \
-  && git clone -b "$BUILD_BRANCH" "${SIMTOOLS_REQUIREMENT}" --depth 1 \
+RUN SIMTOOLS_BRANCH=${SIMTOOLS_BRANCH//refs\/tags\//} \
+  && git clone -b "$SIMTOOLS_BRANCH" "${SIMTOOLS_REPO}" --depth 1 \
   && python${PYTHON_VERSION} -m venv env \
   && . env/bin/activate \
   && pip install --no-cache-dir -U pip \
-  && pip install --no-cache-dir "git+${SIMTOOLS_REQUIREMENT}@${BUILD_BRANCH}" \
+  && pip install --no-cache-dir "git+${SIMTOOLS_REPO}@${SIMTOOLS_BRANCH}" \
   && pip cache purge && rm -rf /root/.cache \
   && echo ". /workdir/env/bin/activate" >> ~/.bashrc
 
diff --git a/docker/Dockerfile-simtools-prod b/docker/Dockerfile-simtools-prod
index 435ff830f8..8208782637 100644
--- a/docker/Dockerfile-simtools-prod
+++ b/docker/Dockerfile-simtools-prod
@@ -1,35 +1,26 @@
-# Dockerfile for simtools development.
+# Dockerfile for simtools production.
 #
-# Uses CORSIKA (no vector optimization) and sim_telarray images.
-#
-# Minimal CORSIKA version is 7.8x (otherwise QGSJet-II tables need to be added)
-#
-# All dependencies for simtools are installed, but not simtools itself.
-# It is expected that simtools is installed in an external directory
-# mounted in the container.
+# Uses CORSIKA (no vector optimization) and sim_telarray pre-built images.
+# No QGSJet tables are included.
 #
 # hadolint global ignore=DL3013,DL3041
 # - DL3013, DL3041: ignore warnings about using latest
 
-ARG CORSIKA_VERSION="78010"
-ARG CORSIKA_IMAGE_VERSION="latest"
-ARG SIMTEL_VERSION="251124"
+ARG CORSIKA_IMAGE_VERSION="pr-1954-78010"
 ARG SIMTEL_BUILD_OPT="prod6-baseline"
 ARG SIMTEL_IMAGE_VERSION="latest"
 ARG AVX_INSTRUCTION="no_opt"
-ARG PYTHON_VERSION="3.12"
-ARG BUILD_BRANCH=main
-ARG SIMTOOLS_REQUIREMENT="https://github.com/gammasim/simtools.git"
+ARG PYTHON_VERSION="3.13"
+ARG SIMTOOLS_BRANCH=main
+ARG SIMTOOLS_REPO="https://github.com/gammasim/simtools.git"
 
-ARG CORSIKA_VERSION ARG CORSIKA_IMAGE_VERSION ARG AVX_INSTRUCTION
-FROM ghcr.io/gammasim/corsika7-${CORSIKA_VERSION}-${AVX_INSTRUCTION}:${CORSIKA_IMAGE_VERSION} AS corsika_img
-ARG SIMTEL_VERSION ARG SIMTEL_IMAGE_VERSION ARG SIMTEL_BUILD_OPT
-FROM ghcr.io/gammasim/simtel-${SIMTEL_VERSION}-${SIMTEL_BUILD_OPT}:${SIMTEL_IMAGE_VERSION} AS simtel_img
+FROM ghcr.io/gammasim/corsika7:${CORSIKA_IMAGE_VERSION}-${AVX_INSTRUCTION} AS corsika_img
+FROM ghcr.io/gammasim/simtel-${SIMTEL_BUILD_OPT}:${SIMTEL_IMAGE_VERSION} AS simtel_img
 
 FROM almalinux:9.5-minimal
-ARG BUILD_BRANCH
-ARG SIMTOOLS_REQUIREMENT
 ARG PYTHON_VERSION
+ARG SIMTOOLS_BRANCH
+ARG SIMTOOLS_REPO
 
 COPY --from=corsika_img /workdir/simulation_software/corsika7  /workdir/simulation_software/corsika7
 COPY --from=simtel_img /workdir/simulation_software/sim_telarray /workdir/simulation_software/sim_telarray
@@ -46,12 +37,12 @@ RUN microdnf update -y && microdnf install -y \
 WORKDIR /workdir
 
 # hadolint ignore=DL4006
-RUN BUILD_BRANCH="$(printf '%s' "$BUILD_BRANCH" | sed 's#refs/tags/##')" \
-  && git clone -b "$BUILD_BRANCH" "${SIMTOOLS_REQUIREMENT}" --depth 1 \
+RUN SIMTOOLS_BRANCH="$(printf '%s' "$SIMTOOLS_BRANCH" | sed 's#refs/tags/##')" \
+  && git clone -b "$SIMTOOLS_BRANCH" "${SIMTOOLS_REPO}" --depth 1 \
   && python${PYTHON_VERSION} -m venv env \
   && . env/bin/activate \
   && pip install --no-cache-dir -U pip \
-  && pip install --no-cache-dir "git+${SIMTOOLS_REQUIREMENT}@${BUILD_BRANCH}" \
+  && pip install --no-cache-dir "git+${SIMTOOLS_REPO}@${SIMTOOLS_BRANCH}" \
   && pip cache purge && rm -rf /root/.cache \
   && echo ". /workdir/env/bin/activate" >> ~/.bashrc
 

From b993820af5a9e639bf78f3088c4cecb19bd5739a Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 11:21:49 +0100
Subject: [PATCH 05/19] legacy renaming

---
 .../{build-corsika-simtel.yml => build-corsika-simtel-legacy.yml} | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename .github/workflows/{build-corsika-simtel.yml => build-corsika-simtel-legacy.yml} (100%)

diff --git a/.github/workflows/build-corsika-simtel.yml b/.github/workflows/build-corsika-simtel-legacy.yml
similarity index 100%
rename from .github/workflows/build-corsika-simtel.yml
rename to .github/workflows/build-corsika-simtel-legacy.yml

From eb5d5ca00d460cdacde2f29e2f12e9d9eb66c027 Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 11:22:52 +0100
Subject: [PATCH 06/19] legacy builds

---
 .github/workflows/build-corsika-simtel-legacy.yml | 3 ++-
 .github/workflows/build-simtools-legacy.yml       | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/build-corsika-simtel-legacy.yml b/.github/workflows/build-corsika-simtel-legacy.yml
index 3c3fdf47ad..f20019218f 100644
--- a/.github/workflows/build-corsika-simtel-legacy.yml
+++ b/.github/workflows/build-corsika-simtel-legacy.yml
@@ -1,5 +1,6 @@
 ---
-name: build-corsika-simtel
+name: build-corsika-simtel-legacy
+# **legacy build** - will be deprecated in near futurebuild-simtools-legacy.yml
 # Build and push CORSIKA / sim_telarray base images for different CPU architectures.
 # The no_opt (non-optimized) images are built as multi-platform images (x86_64 and arm64).
 #
diff --git a/.github/workflows/build-simtools-legacy.yml b/.github/workflows/build-simtools-legacy.yml
index cfbda395a2..33eb10abaa 100644
--- a/.github/workflows/build-simtools-legacy.yml
+++ b/.github/workflows/build-simtools-legacy.yml
@@ -1,5 +1,6 @@
 ---
 name: build-simtools-legacy
+# **legacy build** - will be deprecated in near future
 # Build and push simtools images using CORSIKA / sim_telarray base images.
 # Integration tests are running on the non-optimized ('no_opt') images.
 

From 6ff8c0453ce17c464742127aa24b1e3f2eb5a7d5 Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 11:23:05 +0100
Subject: [PATCH 07/19] legacy builds

---
 .github/workflows/build-corsika-simtel-legacy.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/build-corsika-simtel-legacy.yml b/.github/workflows/build-corsika-simtel-legacy.yml
index f20019218f..4939353e0f 100644
--- a/.github/workflows/build-corsika-simtel-legacy.yml
+++ b/.github/workflows/build-corsika-simtel-legacy.yml
@@ -1,6 +1,6 @@
 ---
 name: build-corsika-simtel-legacy
-# **legacy build** - will be deprecated in near futurebuild-simtools-legacy.yml
+# **legacy build** - will be deprecated in near future
 # Build and push CORSIKA / sim_telarray base images for different CPU architectures.
 # The no_opt (non-optimized) images are built as multi-platform images (x86_64 and arm64).
 #

From 9ff1e7eaff3e6f45e950becc8493d0a52f042fd6 Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 11:23:18 +0100
Subject: [PATCH 08/19] typos

---
 .github/workflows/build-sim_telarray.yml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/build-sim_telarray.yml b/.github/workflows/build-sim_telarray.yml
index 61b52d1e91..a3e9062717 100644
--- a/.github/workflows/build-sim_telarray.yml
+++ b/.github/workflows/build-sim_telarray.yml
@@ -49,7 +49,7 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Extract metadata for sim_telarray image (tags, labels)
+      - name: Extract metadata
         id: meta-base
         uses: docker/metadata-action@v5
         with:
@@ -72,9 +72,9 @@ jobs:
             STDTOOLS_VERSION=${{ matrix.version.stdtools_version }}
             EXTRA_DEF=${{ matrix.production.extra_def }}
           secrets: |
-            sim_telarray_token=${{ secrets.SIMTELARRAY_CTAO_GITLAB}}
-            hessio_token=${{ secrets.HESSIO_CTAO_GITLAB}}
-            stdtools_token=${{ secrets.STDTOOLS_CTAO_GITLAB}}
+            sim_telarray_token=${{ secrets.SIMTELARRAY_CTAO_GITLAB }}
+            hessio_token=${{ secrets.HESSIO_CTAO_GITLAB }}
+            stdtools_token=${{ secrets.STDTOOLS_CTAO_GITLAB }}
           push: ${{ github.event_name == 'workflow_dispatch' }}
           file: ./docker/Dockerfile-simtel_array
           tags: ${{ steps.meta-base.outputs.tags }}

From b2b01bde6649f4d8041e88d0d3d8fe93a5b3fc7a Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 12:24:04 +0100
Subject: [PATCH 09/19] production docker file

---
 .../workflows/build-corsika-simtel-legacy.yml | 24 +++---
 .github/workflows/build-corsika7.yml          | 23 +++--
 .github/workflows/build-simtools-dev.yml      |  9 --
 .github/workflows/build-simtools-legacy.yml   | 34 ++++----
 .github/workflows/build-simtools-prod.yml     | 83 +++++++++++++++++++
 docker/Dockerfile-simtools-dev                |  4 +-
 docker/Dockerfile-simtools-prod               |  7 +-
 7 files changed, 128 insertions(+), 56 deletions(-)
 create mode 100644 .github/workflows/build-simtools-prod.yml

diff --git a/.github/workflows/build-corsika-simtel-legacy.yml b/.github/workflows/build-corsika-simtel-legacy.yml
index 4939353e0f..92c7c43b27 100644
--- a/.github/workflows/build-corsika-simtel-legacy.yml
+++ b/.github/workflows/build-corsika-simtel-legacy.yml
@@ -74,22 +74,22 @@ jobs:
       matrix:
         version:
           # list of avx instructions: 'avx2', 'avx512f', 'sse4', 'avx'
-          - {simtel_version: '240205', corsika_version: '77500', bernlohr_version: '1.67', hadronic_model: 'qgs2', avx_instruction: 'no_opt'}
-          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_instruction: 'no_opt'}
-          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_instruction: 'avx2'}
-          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_instruction: 'avx512f'}
-          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_instruction: 'sse4'}
-          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_instruction: 'no_opt'}
-          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_instruction: 'avx2'}
-          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_instruction: 'avx512f'}
-          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_instruction: 'sse4'}
+          - {simtel_version: '240205', corsika_version: '77500', bernlohr_version: '1.67', hadronic_model: 'qgs2', avx_flag: 'no_opt'}
+          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_flag: 'no_opt'}
+          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_flag: 'avx2'}
+          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_flag: 'avx512f'}
+          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_flag: 'sse4'}
+          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_flag: 'no_opt'}
+          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_flag: 'avx2'}
+          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_flag: 'avx512f'}
+          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_flag: 'sse4'}
         production:
           # list of productions build options: 'prod6-sc', 'prod6-baseline', 'prod5', 'prod5-sc'
           # - {build_opt: 'prod6-sc', extra_def: ''}  # currently not used
           - {build_opt: 'prod6-baseline', extra_def: ''}
 
     env:
-      BASE_LABELS: "corsika-simtel-${{ matrix.version.simtel_version }}-corsika-${{ matrix.version.corsika_version }}-bernlohr-${{ matrix.version.bernlohr_version }}-${{ matrix.production.build_opt }}-${{ matrix.version.hadronic_model }}-${{ matrix.version.avx_instruction }}"
+      BASE_LABELS: "corsika-simtel-${{ matrix.version.simtel_version }}-corsika-${{ matrix.version.corsika_version }}-bernlohr-${{ matrix.version.bernlohr_version }}-${{ matrix.production.build_opt }}-${{ matrix.version.hadronic_model }}-${{ matrix.version.avx_flag }}"
 
     steps:
       - name: Checkout repository
@@ -145,12 +145,12 @@ jobs:
         with:
           context: .
           # Build multi-platform only for no_opt (non-optimized) variant, others are x86-specific
-          platforms: ${{ matrix.version.avx_instruction == 'no_opt' && 'linux/amd64,linux/arm64/v8' || 'linux/amd64' }}
+          platforms: ${{ matrix.version.avx_flag == 'no_opt' && 'linux/amd64,linux/arm64/v8' || 'linux/amd64' }}
           build-args: |
             BUILD_OPT=${{ matrix.production.build_opt }}
             EXTRA_DEF=${{ matrix.production.extra_def }}
             HADRONIC_MODEL=${{ matrix.version.hadronic_model }}
-            AVX_FLAG=${{ matrix.version.avx_instruction }}
+            AVX_FLAG=${{ matrix.version.avx_flag }}
             CORSIKA_VERSION=${{ matrix.version.corsika_version }}
             BERNLOHR_VERSION=${{ matrix.version.bernlohr_version }}
           secrets: |
diff --git a/.github/workflows/build-corsika7.yml b/.github/workflows/build-corsika7.yml
index 2ef30f37a8..565181e984 100644
--- a/.github/workflows/build-corsika7.yml
+++ b/.github/workflows/build-corsika7.yml
@@ -45,14 +45,13 @@ jobs:
     strategy:
       matrix:
         version:
-          - {corsika_version: '78010', avx_instruction: 'no_opt'}
-          - {corsika_version: '78010', avx_instruction: 'avx2'}
-          - {corsika_version: '78010', avx_instruction: 'avx512f'}
-          - {corsika_version: '78010', avx_instruction: 'sse4'}
-
+          - {corsika_version: '78010', avx_flag: 'no_opt'}
+          - {corsika_version: '78010', avx_flag: 'avx2'}
+          - {corsika_version: '78010', avx_flag: 'avx512f'}
+          - {corsika_version: '78010', avx_flag: 'sse4'}
     env:
       BASE_LABEL: "corsika7"
-      BASE_TAG: "${{ matrix.version.corsika_version }}-${{ matrix.version.avx_instruction }}"
+      BASE_TAG: "${{ matrix.version.corsika_version }}-${{ matrix.version.avx_flag }}"
 
     steps:
       - name: Checkout repository
@@ -75,7 +74,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Extract metadata
-        id: meta-base
+        id: meta
         uses: docker/metadata-action@v5
         with:
           tags: |
@@ -91,18 +90,18 @@ jobs:
         with:
           context: .
           # Build multi-platform only for no_opt (non-optimized) variant, others are x86-specific
-          platforms: ${{ matrix.version.avx_instruction == 'no_opt' && 'linux/amd64,linux/arm64/v8' || 'linux/amd64' }}
+          platforms: ${{ matrix.version.avx_flag == 'no_opt' && 'linux/amd64,linux/arm64/v8' || 'linux/amd64' }}
           build-args: |
-            AVX_FLAG=${{ matrix.version.avx_instruction }}
+            AVX_FLAG=${{ matrix.version.avx_flag }}
             CORSIKA_VERSION=${{ matrix.version.corsika_version }}
           secrets: |
             corsika7_token=${{ secrets.CORSIKA7_KIT_GITLAB }}
           push: ${{ github.event_name == 'workflow_dispatch' }}
           file: ./docker/Dockerfile-corsika7
-          tags: ${{ steps.meta-base.outputs.tags }}
-          labels: ${{ steps.meta-base.outputs.labels }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
 
       - name: Output image information
         run: |
           echo "Built base image: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABEL }}:latest"
-          echo "Image tags: ${{ steps.meta-base.outputs.tags }}"
+          echo "Image tags: ${{ steps.meta.outputs.tags }}"
diff --git a/.github/workflows/build-simtools-dev.yml b/.github/workflows/build-simtools-dev.yml
index 3e8ff7aafb..691bf18853 100644
--- a/.github/workflows/build-simtools-dev.yml
+++ b/.github/workflows/build-simtools-dev.yml
@@ -88,15 +88,6 @@ jobs:
           images: ${{ env.REGISTRY }}/gammasim/simtools-${{ matrix.type }}
           flavor: latest=true
 
-      - name: Build Docker image
-        uses: docker/build-push-action@v6
-        with:
-          context: .
-          build-args: SIMTOOLS_BRANCH=${{ env.SIMTOOLS_BRANCH }}
-          load: true
-          file: ./docker/Dockerfile-simtools-${{ matrix.type }}
-          tags: ${{ env.TEST_TAG }}
-
       - name: Build and push image
         uses: docker/build-push-action@v6
         with:
diff --git a/.github/workflows/build-simtools-legacy.yml b/.github/workflows/build-simtools-legacy.yml
index 33eb10abaa..4d3fe76665 100644
--- a/.github/workflows/build-simtools-legacy.yml
+++ b/.github/workflows/build-simtools-legacy.yml
@@ -31,23 +31,23 @@ jobs:
       matrix:
         version:
           # list of avx instructions: 'avx2', 'avx512f', 'sse4', 'avx'
-          - {simtel_version: '240205', corsika_version: '77500', bernlohr_version: '1.67', hadronic_model: 'qgs2', avx_instruction: 'no_opt'}
-          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_instruction: 'no_opt'}
-          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_instruction: 'avx2'}
-          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_instruction: 'avx512f'}
-          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_instruction: 'sse4'}
-          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_instruction: 'no_opt'}
-          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_instruction: 'avx2'}
-          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_instruction: 'avx512f'}
-          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_instruction: 'sse4'}
+          - {simtel_version: '240205', corsika_version: '77500', bernlohr_version: '1.67', hadronic_model: 'qgs2', avx_flag: 'no_opt'}
+          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_flag: 'no_opt'}
+          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_flag: 'avx2'}
+          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_flag: 'avx512f'}
+          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_flag: 'sse4'}
+          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_flag: 'no_opt'}
+          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_flag: 'avx2'}
+          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_flag: 'avx512f'}
+          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_flag: 'sse4'}
         production:
           # list of productions build options: 'prod6-sc', 'prod6-baseline', 'prod5', 'prod5-sc'
           # - {build_opt: 'prod6-sc', extra_def: ''}  # currently not used
           - {build_opt: 'prod6-baseline', extra_def: ''}
 
     env:
-      BASE_LABELS: "corsika-simtel-${{ matrix.version.simtel_version }}-corsika-${{ matrix.version.corsika_version }}-bernlohr-${{ matrix.version.bernlohr_version }}-${{ matrix.production.build_opt }}-${{ matrix.version.hadronic_model }}-${{ matrix.version.avx_instruction }}"
-      SIMTOOLS_LABELS: "simtools-sim-telarray-${{ matrix.version.simtel_version }}-corsika-${{ matrix.version.corsika_version }}-bernlohr-${{ matrix.version.bernlohr_version }}-${{ matrix.production.build_opt }}-${{ matrix.version.hadronic_model }}-${{ matrix.version.avx_instruction }}"
+      BASE_LABELS: "corsika-simtel-${{ matrix.version.simtel_version }}-corsika-${{ matrix.version.corsika_version }}-bernlohr-${{ matrix.version.bernlohr_version }}-${{ matrix.production.build_opt }}-${{ matrix.version.hadronic_model }}-${{ matrix.version.avx_flag }}"
+      SIMTOOLS_LABELS: "simtools-sim-telarray-${{ matrix.version.simtel_version }}-corsika-${{ matrix.version.corsika_version }}-bernlohr-${{ matrix.version.bernlohr_version }}-${{ matrix.production.build_opt }}-${{ matrix.version.hadronic_model }}-${{ matrix.version.avx_flag }}"
 
     steps:
       - name: Checkout repository
@@ -103,11 +103,11 @@ jobs:
       matrix:
         version:
           # list of avx instructions: 'avx2', 'avx512f', 'sse4', 'avx'
-          - {simtel_version: '240205', corsika_version: '77500', bernlohr_version: '1.67', hadronic_model: 'qgs2', avx_instruction: 'no_opt'}
-          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_instruction: 'no_opt'}
-          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_instruction: 'avx2'}
-          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_instruction: 'no_opt'}
-          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_instruction: 'avx2'}
+          - {simtel_version: '240205', corsika_version: '77500', bernlohr_version: '1.67', hadronic_model: 'qgs2', avx_flag: 'no_opt'}
+          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_flag: 'no_opt'}
+          - {simtel_version: '240927', corsika_version: '77550', bernlohr_version: '1.68', hadronic_model: 'qgs2', avx_flag: 'avx2'}
+          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_flag: 'no_opt'}
+          - {simtel_version: '250903', corsika_version: '78010', bernlohr_version: '1.70', hadronic_model: 'qgs3', avx_flag: 'avx2'}
         production:
           # list of productions build options: 'prod6-sc', 'prod6-baseline', 'prod5', 'prod5-sc'
           # - {build_opt: 'prod6-sc', extra_def: ''} # currently not used
@@ -115,7 +115,7 @@ jobs:
         model_version:
           - "6.0.2"
     container:
-      image: ghcr.io/gammasim/simtools-sim-telarray-${{ matrix.version.simtel_version }}-corsika-${{ matrix.version.corsika_version }}-bernlohr-${{ matrix.version.bernlohr_version }}-${{ matrix.production.build_opt }}-${{ matrix.version.hadronic_model }}-${{ matrix.version.avx_instruction }}
+      image: ghcr.io/gammasim/simtools-sim-telarray-${{ matrix.version.simtel_version }}-corsika-${{ matrix.version.corsika_version }}-bernlohr-${{ matrix.version.bernlohr_version }}-${{ matrix.production.build_opt }}-${{ matrix.version.hadronic_model }}-${{ matrix.version.avx_flag }}
       options: --user 0
 
     services:
diff --git a/.github/workflows/build-simtools-prod.yml b/.github/workflows/build-simtools-prod.yml
new file mode 100644
index 0000000000..016be05cc7
--- /dev/null
+++ b/.github/workflows/build-simtools-prod.yml
@@ -0,0 +1,83 @@
+---
+name: build-simtools-prod
+# Build simtools production images based on CORSIKA / sim_telarray images
+
+on:
+  workflow_dispatch:
+  pull_request:
+    paths:
+      - docker/Dockerfile-simtools-prod
+  release:
+    types: [published]
+  schedule:
+    - cron: '0 0 * * 0'  # Every Sunday at 00:00 UTC (build only)
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-simtools-images:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    strategy:
+      matrix:
+        version:
+          - {corsika_image: '78010', avx_flag: 'no_opt', simtel_image: 'latest'}
+    env:
+      BASE_LABEL: "simtools"
+      BASE_TAG: "corsika${{ matrix.version.corsika_image }}-${{ matrix.version.avx_flag }}-simtel${{ matrix.version.simtel_image }}"
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      - name: Set build branch
+        run: |
+          if [[ "${{ github.event_name }}" == 'pull_request' ]]; then
+            echo "SIMTOOLS_BRANCH=${GITHUB_HEAD_REF}" >> "$GITHUB_ENV"
+          else
+            echo "SIMTOOLS_BRANCH=${GITHUB_REF#refs/heads/}" >> "$GITHUB_ENV"
+          fi
+          echo "BUILD BRANCH ${{ env.SIMTOOLS_BRANCH }}"
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          tags: |
+            type=ref,event=pr,suffix=-${{ env.BASE_TAG }}
+            type=semver,pattern={{major}}.{{minor}}.{{patch}}-${{ env.BASE_TAG }}
+            type=schedule,pattern={{date 'YYYYMMDD'}}-${{ env.BASE_TAG }}
+            type=raw,value={{date 'YYYYMMDD-HHmmss'}}-${{ env.BASE_TAG }}
+          images: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABEL }}
+          flavor: latest=true
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          # Build multi-platform only for no_opt (non-optimized) variant, others are x86-specific
+          platforms: ${{ matrix.version.avx_flag == 'no_opt' && 'linux/amd64,linux/arm64/v8' || 'linux/amd64' }}
+          build-args: |
+            CORSIKA_IMAGE_VERSION=${{ matrix.version.corsika_image }}
+            SIMTEL_BUILD_OPT=prod6-baseline
+            SIMTEL_IMAGE_VERSION=${{ matrix.version.simtel_image }}
+            AVX_FLAG=${{ matrix.version.avx_flag }}
+            SIMTOOLS_BRANCH=${{ env.SIMTOOLS_BRANCH }}
+          file: ./docker/Dockerfile-simtools-prod
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          push: ${{ github.event_name == 'release' || github.ref == 'refs/heads/main' || github.event_name == 'workflow_dispatch' }}
diff --git a/docker/Dockerfile-simtools-dev b/docker/Dockerfile-simtools-dev
index ef0edab001..fed364ce8c 100644
--- a/docker/Dockerfile-simtools-dev
+++ b/docker/Dockerfile-simtools-dev
@@ -14,11 +14,11 @@
 ARG CORSIKA_IMAGE_VERSION="pr-1954-78010"
 ARG SIMTEL_BUILD_OPT="prod6-baseline"
 ARG SIMTEL_IMAGE_VERSION="latest"
-ARG AVX_INSTRUCTION="no_opt"
+ARG AVX_FLAG="no_opt"
 ARG PYTHON_VERSION="3.13"
 ARG SIMTOOLS_REPO="https://github.com/gammasim/simtools.git"
 
-FROM ghcr.io/gammasim/corsika7:${CORSIKA_IMAGE_VERSION}-${AVX_INSTRUCTION} AS corsika_img
+FROM ghcr.io/gammasim/corsika7:${CORSIKA_IMAGE_VERSION}-${AVX_FLAG} AS corsika_img
 FROM ghcr.io/gammasim/simtel-${SIMTEL_BUILD_OPT}:${SIMTEL_IMAGE_VERSION} AS simtel_img
 
 FROM almalinux:9.5-minimal
diff --git a/docker/Dockerfile-simtools-prod b/docker/Dockerfile-simtools-prod
index 8208782637..e4c419fac7 100644
--- a/docker/Dockerfile-simtools-prod
+++ b/docker/Dockerfile-simtools-prod
@@ -9,18 +9,17 @@
 ARG CORSIKA_IMAGE_VERSION="pr-1954-78010"
 ARG SIMTEL_BUILD_OPT="prod6-baseline"
 ARG SIMTEL_IMAGE_VERSION="latest"
-ARG AVX_INSTRUCTION="no_opt"
+ARG AVX_FLAG="no_opt"
 ARG PYTHON_VERSION="3.13"
 ARG SIMTOOLS_BRANCH=main
-ARG SIMTOOLS_REPO="https://github.com/gammasim/simtools.git"
 
-FROM ghcr.io/gammasim/corsika7:${CORSIKA_IMAGE_VERSION}-${AVX_INSTRUCTION} AS corsika_img
+FROM ghcr.io/gammasim/corsika7:${CORSIKA_IMAGE_VERSION}-${AVX_FLAG} AS corsika_img
 FROM ghcr.io/gammasim/simtel-${SIMTEL_BUILD_OPT}:${SIMTEL_IMAGE_VERSION} AS simtel_img
 
 FROM almalinux:9.5-minimal
 ARG PYTHON_VERSION
 ARG SIMTOOLS_BRANCH
-ARG SIMTOOLS_REPO
+ARG SIMTOOLS_REPO="https://github.com/gammasim/simtools.git"
 
 COPY --from=corsika_img /workdir/simulation_software/corsika7  /workdir/simulation_software/corsika7
 COPY --from=simtel_img /workdir/simulation_software/sim_telarray /workdir/simulation_software/sim_telarray

From a709f201b46337d2dbf9123986283c0fef3bf1d6 Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 12:34:31 +0100
Subject: [PATCH 10/19] corsika config release v0.1.0

---
 docker/Dockerfile-corsika7 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docker/Dockerfile-corsika7 b/docker/Dockerfile-corsika7
index 06485dfbd8..f57759c973 100644
--- a/docker/Dockerfile-corsika7
+++ b/docker/Dockerfile-corsika7
@@ -12,7 +12,7 @@
 
 ARG CORSIKA_VERSION="78010"
 ARG CORSIKA_OPT_PATCH_VERSION="v1.1.0"
-ARG CORSIKA_CONFIG_VERSION="78010"
+ARG CORSIKA_CONFIG_VERSION="v0.1.0"
 ARG AVX_FLAG="avx2"
 
 # hadolint global ignore=DL3013,DL3033,DL3041,DL4006,SC1091,SC2086

From 0ee4bb2026e2f77763d7f0c1c11fd5b85ba78867 Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 12:44:07 +0100
Subject: [PATCH 11/19] fix image tag

---
 .github/workflows/build-sim_telarray.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/build-sim_telarray.yml b/.github/workflows/build-sim_telarray.yml
index a3e9062717..3a4c16cf75 100644
--- a/.github/workflows/build-sim_telarray.yml
+++ b/.github/workflows/build-sim_telarray.yml
@@ -32,8 +32,8 @@ jobs:
           - {build_opt: 'prod6-baseline', extra_def: '-DMAXIMUM_TELESCOPES=99'}
 
     env:
-      BASE_LABEL: "simtel-${{ matrix.production.build_opt }}"
-      BASE_TAG: "simtel-${{ matrix.version.simtel_version }}"
+      BASE_LABEL: "sim_telarray"
+      BASE_TAG: "${{ matrix.production.build_opt }}-${{ matrix.version.simtel_version }}"
 
     steps:
       - name: Checkout repository

From 665c5868db5fb49432d52b1a6b1b42e1d8073464 Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 13:41:28 +0100
Subject: [PATCH 12/19] simpler tags

---
 .github/workflows/build-corsika7.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/build-corsika7.yml b/.github/workflows/build-corsika7.yml
index 565181e984..fe10512424 100644
--- a/.github/workflows/build-corsika7.yml
+++ b/.github/workflows/build-corsika7.yml
@@ -81,7 +81,7 @@ jobs:
             type=ref,event=pr,suffix=-${{ env.BASE_TAG }}
             type=semver,pattern={{major}}.{{minor}}.{{patch}}-${{ env.BASE_TAG }}
             type=schedule,pattern={{date 'YYYYMMDD'}}-${{ env.BASE_TAG }}
-            type=raw,value={{date 'YYYYMMDD-HHmmss'}}-${{ env.BASE_TAG }}
+            type=raw,value={{date 'YYYYMMDD'}}-${{ env.BASE_TAG }}
           images: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABEL }}
           flavor: latest=false
 

From 253145ba9d71d312d893e77b0ecbd0db929690b3 Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 14:15:41 +0100
Subject: [PATCH 13/19] naming in changelog

---
 .github/workflows/build-corsika7.yml      | 21 +++++++-----------
 .github/workflows/build-sim_telarray.yml  | 25 +++++++--------------
 .github/workflows/build-simtools-dev.yml  | 27 +++++++++--------------
 .github/workflows/build-simtools-prod.yml | 20 +++++++++--------
 docker/Dockerfile-simtools-dev            | 10 ++++-----
 docker/Dockerfile-simtools-prod           |  7 +++---
 docs/changes/1954.api.md                  |  6 +++++
 docs/changes/1954.feature.md              |  3 +++
 8 files changed, 54 insertions(+), 65 deletions(-)
 create mode 100644 docs/changes/1954.api.md
 create mode 100644 docs/changes/1954.feature.md

diff --git a/.github/workflows/build-corsika7.yml b/.github/workflows/build-corsika7.yml
index fe10512424..a8dd3315a7 100644
--- a/.github/workflows/build-corsika7.yml
+++ b/.github/workflows/build-corsika7.yml
@@ -20,7 +20,6 @@ env:
   CLOUD_URL: "https://syncandshare.desy.de/index.php/s/"
 
 jobs:
-
   download-auxiliary-files:
     runs-on: ubuntu-latest
 
@@ -45,17 +44,17 @@ jobs:
     strategy:
       matrix:
         version:
-          - {corsika_version: '78010', avx_flag: 'no_opt'}
-          - {corsika_version: '78010', avx_flag: 'avx2'}
-          - {corsika_version: '78010', avx_flag: 'avx512f'}
-          - {corsika_version: '78010', avx_flag: 'sse4'}
+          - {corsika: '78010', avx_flag: 'no_opt', corsika_config: 'v0.1.0'}
+          - {corsika: '78010', avx_flag: 'avx2', corsika_config: 'v0.1.0'}
+          - {corsika: '78010', avx_flag: 'avx512f', corsika_config: 'v0.1.0'}
+          - {corsika: '78010', avx_flag: 'sse4', corsika_config: 'v0.1.0'}
     env:
       BASE_LABEL: "corsika7"
-      BASE_TAG: "${{ matrix.version.corsika_version }}-${{ matrix.version.avx_flag }}"
+      BASE_TAG: "${{ matrix.version.corsika }}-${{ matrix.version.avx_flag }}"
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Download auxiliary files
         uses: actions/download-artifact@v6
@@ -93,15 +92,11 @@ jobs:
           platforms: ${{ matrix.version.avx_flag == 'no_opt' && 'linux/amd64,linux/arm64/v8' || 'linux/amd64' }}
           build-args: |
             AVX_FLAG=${{ matrix.version.avx_flag }}
-            CORSIKA_VERSION=${{ matrix.version.corsika_version }}
+            CORSIKA_VERSION=${{ matrix.version.corsika }}
+            CORSIKA_CONFIG_VERSION=${{ matrix.version.corsika_config }}
           secrets: |
             corsika7_token=${{ secrets.CORSIKA7_KIT_GITLAB }}
           push: ${{ github.event_name == 'workflow_dispatch' }}
           file: ./docker/Dockerfile-corsika7
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-
-      - name: Output image information
-        run: |
-          echo "Built base image: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABEL }}:latest"
-          echo "Image tags: ${{ steps.meta.outputs.tags }}"
diff --git a/.github/workflows/build-sim_telarray.yml b/.github/workflows/build-sim_telarray.yml
index 3a4c16cf75..e4121b8e84 100644
--- a/.github/workflows/build-sim_telarray.yml
+++ b/.github/workflows/build-sim_telarray.yml
@@ -19,7 +19,7 @@ env:
   CLOUD_URL: "https://syncandshare.desy.de/index.php/s/"
 
 jobs:
-  build-base-images:
+  build-sim_telarray:
     runs-on: ubuntu-latest
     permissions:
       contents: read
@@ -28,16 +28,13 @@ jobs:
       matrix:
         version:
           - {simtel_version: 'master', hessio_version: 'master', stdtools_version: 'master'}
-        production:
-          - {build_opt: 'prod6-baseline', extra_def: '-DMAXIMUM_TELESCOPES=99'}
-
     env:
       BASE_LABEL: "sim_telarray"
-      BASE_TAG: "${{ matrix.production.build_opt }}-${{ matrix.version.simtel_version }}"
+      BASE_TAG: "${{ matrix.version.simtel_version }}"
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
@@ -50,18 +47,18 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Extract metadata
-        id: meta-base
+        id: meta
         uses: docker/metadata-action@v5
         with:
           tags: |
             type=ref,event=pr,suffix=-${{ env.BASE_TAG }}
             type=semver,pattern={{major}}.{{minor}}.{{patch}}-${{ env.BASE_TAG }}
             type=schedule,pattern={{date 'YYYYMMDD'}}-${{ env.BASE_TAG }}
-            type=raw,value={{date 'YYYYMMDD-HHmmss'}}-${{ env.BASE_TAG }}
+            type=raw,value={{date 'YYYYMMDD'}}-${{ env.BASE_TAG }}
           images: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABEL }}
           flavor: latest=true
 
-      - name: Build /sim_telarray image
+      - name: Build and push
         uses: docker/build-push-action@v6
         with:
           context: .
@@ -70,17 +67,11 @@ jobs:
             SIMTEL_VERSION=${{ matrix.version.simtel_version }}
             HESSIO_VERSION=${{ matrix.version.hessio_version }}
             STDTOOLS_VERSION=${{ matrix.version.stdtools_version }}
-            EXTRA_DEF=${{ matrix.production.extra_def }}
           secrets: |
             sim_telarray_token=${{ secrets.SIMTELARRAY_CTAO_GITLAB }}
             hessio_token=${{ secrets.HESSIO_CTAO_GITLAB }}
             stdtools_token=${{ secrets.STDTOOLS_CTAO_GITLAB }}
           push: ${{ github.event_name == 'workflow_dispatch' }}
           file: ./docker/Dockerfile-simtel_array
-          tags: ${{ steps.meta-base.outputs.tags }}
-          labels: ${{ steps.meta-base.outputs.labels }}
-
-      - name: Output image information
-        run: |
-          echo "Built base image: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABEL }}:latest"
-          echo "Image tags: ${{ steps.meta-base.outputs.tags }}"
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
diff --git a/.github/workflows/build-simtools-dev.yml b/.github/workflows/build-simtools-dev.yml
index 691bf18853..25c418b013 100644
--- a/.github/workflows/build-simtools-dev.yml
+++ b/.github/workflows/build-simtools-dev.yml
@@ -6,7 +6,7 @@ on:
   workflow_dispatch:
   pull_request:
     paths:
-      - './docker/Dockerfile-simtools-dev'
+      - docker/Dockerfile-simtools-dev
   release:
     types: [published]
   schedule:
@@ -15,7 +15,6 @@ on:
 env:
   REGISTRY: ghcr.io
   IMAGE_NAME: ${{ github.repository }}
-  TEST_TAG: user/app:test
   CLOUD_URL: "https://syncandshare.desy.de/index.php/s/"
 
 jobs:
@@ -34,15 +33,14 @@ jobs:
             qgsdat-III.bz2
           retention-days: 1
 
-  build-simtools-container:
+  build-simtools-dev:
     runs-on: ubuntu-latest
     needs: [download-qgsjet-tables]
     permissions:
       contents: read
       packages: write
-    strategy:
-      matrix:
-        type: ['dev']
+    env:
+      BASE_LABEL: "simtools-dev"
 
     steps:
       - name: Checkout repository
@@ -54,7 +52,7 @@ jobs:
           name: upload-qgsjet-tables
           path: .
 
-      - name: Set build arguments (correct branch)
+      - name: Set build branch
         run: |
           if [[ "${{ github.event_name }}" == 'pull_request' ]]; then
             echo "SIMTOOLS_BRANCH=${GITHUB_HEAD_REF}" >> "$GITHUB_ENV"
@@ -63,9 +61,6 @@ jobs:
           fi
           echo "BUILD BRANCH ${{ env.SIMTOOLS_BRANCH }}"
 
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -76,7 +71,7 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Extract metadata (tags, labels) for Docker
+      - name: Extract metadata
         id: meta
         uses: docker/metadata-action@v5
         with:
@@ -84,17 +79,17 @@ jobs:
             type=ref,event=pr
             type=semver,pattern={{major}}.{{minor}}.{{patch}}
             type=schedule,pattern={{date 'YYYYMMDD'}}
-            type=raw,value={{date 'YYYYMMDD-HHmmss'}}
-          images: ${{ env.REGISTRY }}/gammasim/simtools-${{ matrix.type }}
+            type=raw,value={{date 'YYYYMMDD'}}
+          images: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABEL }}
           flavor: latest=true
 
-      - name: Build and push image
+      - name: Build and push
         uses: docker/build-push-action@v6
         with:
           context: .
           platforms: linux/amd64,linux/arm64/v8
           build-args: SIMTOOLS_BRANCH=${{ env.SIMTOOLS_BRANCH }}
           push: ${{ github.event_name == 'release' || github.ref == 'refs/heads/main' || github.event_name == 'workflow_dispatch' }}
-          file: ./docker/Dockerfile-simtools-${{ matrix.type }}
+          file: ./docker/Dockerfile-simtools-dev
           tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}-${{ matrix.type }}
+          labels: ${{ steps.meta.outputs.labels }}
diff --git a/.github/workflows/build-simtools-prod.yml b/.github/workflows/build-simtools-prod.yml
index 016be05cc7..5dcbc4e5b7 100644
--- a/.github/workflows/build-simtools-prod.yml
+++ b/.github/workflows/build-simtools-prod.yml
@@ -17,7 +17,7 @@ env:
   IMAGE_NAME: ${{ github.repository }}
 
 jobs:
-  build-simtools-images:
+  build-simtools-prod:
     runs-on: ubuntu-latest
     permissions:
       contents: read
@@ -25,10 +25,13 @@ jobs:
     strategy:
       matrix:
         version:
-          - {corsika_image: '78010', avx_flag: 'no_opt', simtel_image: 'latest'}
+          - {corsika: '78010', avx_flag: 'no_opt', simtel_image: 'latest'}
+          - {corsika: '78010', avx_flag: 'avx2', simtel_image: 'latest'}
+          - {corsika: '78010', avx_flag: 'avx512f', simtel_image: 'latest'}
+          - {corsika: '78010', avx_flag: 'sse4', simtel_image: 'latest'}
     env:
-      BASE_LABEL: "simtools"
-      BASE_TAG: "corsika${{ matrix.version.corsika_image }}-${{ matrix.version.avx_flag }}-simtel${{ matrix.version.simtel_image }}"
+      BASE_LABEL: "simtools-prod"
+      BASE_TAG: "corsika${{ matrix.version.corsika }}-${{ matrix.version.avx_flag }}-simtel${{ matrix.version.simtel_image }}"
 
     steps:
       - name: Checkout repository
@@ -61,9 +64,9 @@ jobs:
             type=ref,event=pr,suffix=-${{ env.BASE_TAG }}
             type=semver,pattern={{major}}.{{minor}}.{{patch}}-${{ env.BASE_TAG }}
             type=schedule,pattern={{date 'YYYYMMDD'}}-${{ env.BASE_TAG }}
-            type=raw,value={{date 'YYYYMMDD-HHmmss'}}-${{ env.BASE_TAG }}
+            type=raw,value={{date 'YYYYMMDD'}}-${{ env.BASE_TAG }}
           images: ${{ env.REGISTRY }}/gammasim/${{ env.BASE_LABEL }}
-          flavor: latest=true
+          flavor: latest=false
 
       - name: Build and push
         uses: docker/build-push-action@v6
@@ -72,12 +75,11 @@ jobs:
           # Build multi-platform only for no_opt (non-optimized) variant, others are x86-specific
           platforms: ${{ matrix.version.avx_flag == 'no_opt' && 'linux/amd64,linux/arm64/v8' || 'linux/amd64' }}
           build-args: |
-            CORSIKA_IMAGE_VERSION=${{ matrix.version.corsika_image }}
-            SIMTEL_BUILD_OPT=prod6-baseline
+            CORSIKA_IMAGE_VERSION=${{ matrix.version.corsika }}
             SIMTEL_IMAGE_VERSION=${{ matrix.version.simtel_image }}
             AVX_FLAG=${{ matrix.version.avx_flag }}
             SIMTOOLS_BRANCH=${{ env.SIMTOOLS_BRANCH }}
+          push: ${{ github.event_name == 'release' || github.ref == 'refs/heads/main' || github.event_name == 'workflow_dispatch' }}
           file: ./docker/Dockerfile-simtools-prod
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          push: ${{ github.event_name == 'release' || github.ref == 'refs/heads/main' || github.event_name == 'workflow_dispatch' }}
diff --git a/docker/Dockerfile-simtools-dev b/docker/Dockerfile-simtools-dev
index fed364ce8c..9842a92373 100644
--- a/docker/Dockerfile-simtools-dev
+++ b/docker/Dockerfile-simtools-dev
@@ -11,19 +11,17 @@
 # hadolint global ignore=DL3013,DL3041
 # - DL3013, DL3041: ignore warnings about using latest
 
-ARG CORSIKA_IMAGE_VERSION="pr-1954-78010"
-ARG SIMTEL_BUILD_OPT="prod6-baseline"
+ARG CORSIKA_IMAGE_VERSION="20251217-78010"
 ARG SIMTEL_IMAGE_VERSION="latest"
 ARG AVX_FLAG="no_opt"
-ARG PYTHON_VERSION="3.13"
-ARG SIMTOOLS_REPO="https://github.com/gammasim/simtools.git"
+ARG PYTHON_VERSION="3.12"
 
 FROM ghcr.io/gammasim/corsika7:${CORSIKA_IMAGE_VERSION}-${AVX_FLAG} AS corsika_img
-FROM ghcr.io/gammasim/simtel-${SIMTEL_BUILD_OPT}:${SIMTEL_IMAGE_VERSION} AS simtel_img
+FROM ghcr.io/gammasim/sim_telarray:${SIMTEL_IMAGE_VERSION} AS simtel_img
 
 FROM almalinux:9.5-minimal
 ARG PYTHON_VERSION
-ARG SIMTOOLS_REPO
+ARG SIMTOOLS_REPO="https://github.com/gammasim/simtools.git"
 
 COPY --from=corsika_img /workdir/simulation_software/corsika7  /workdir/simulation_software/corsika7
 COPY --from=simtel_img /workdir/simulation_software/sim_telarray /workdir/simulation_software/sim_telarray
diff --git a/docker/Dockerfile-simtools-prod b/docker/Dockerfile-simtools-prod
index e4c419fac7..82bd4b212d 100644
--- a/docker/Dockerfile-simtools-prod
+++ b/docker/Dockerfile-simtools-prod
@@ -6,15 +6,14 @@
 # hadolint global ignore=DL3013,DL3041
 # - DL3013, DL3041: ignore warnings about using latest
 
-ARG CORSIKA_IMAGE_VERSION="pr-1954-78010"
-ARG SIMTEL_BUILD_OPT="prod6-baseline"
+ARG CORSIKA_IMAGE_VERSION="20251217-78010"
 ARG SIMTEL_IMAGE_VERSION="latest"
 ARG AVX_FLAG="no_opt"
-ARG PYTHON_VERSION="3.13"
+ARG PYTHON_VERSION="3.12"
 ARG SIMTOOLS_BRANCH=main
 
 FROM ghcr.io/gammasim/corsika7:${CORSIKA_IMAGE_VERSION}-${AVX_FLAG} AS corsika_img
-FROM ghcr.io/gammasim/simtel-${SIMTEL_BUILD_OPT}:${SIMTEL_IMAGE_VERSION} AS simtel_img
+FROM ghcr.io/gammasim/sim_telarray:${SIMTEL_IMAGE_VERSION} AS simtel_img
 
 FROM almalinux:9.5-minimal
 ARG PYTHON_VERSION
diff --git a/docs/changes/1954.api.md b/docs/changes/1954.api.md
new file mode 100644
index 0000000000..ff4810fcd2
--- /dev/null
+++ b/docs/changes/1954.api.md
@@ -0,0 +1,6 @@
+Change in naming of simtools docker images:
+
+- [CORSIKA image](https://github.com/gammasim/simtools/pkgs/container/corsika7) is now called e.g. `ghcr.io/gammasim/corsika7:0.26.0-78010-avx512f`
+- [sim_telarray image](https://github.com/gammasim/simtools/pkgs/container/sim_telarray) is now called e.g. `ghcr.io/gammasim/sim_telarray:0.26.0-<sim_telarray version>`
+- [simtools-dev image](https://github.com/gammasim/simtools/pkgs/container/simtools-dev) is now called e.g. `ghcr.io/gammasim/simtools-dev:latest` (save to use the latest tag here)
+- [simtools-prod image](https://github.com/gammasim/simtools/pkgs/container/simtools-prod) is now called e.g. `ghcr.io/gammasim/simtools-prod:0.26.0-corsika<corsika version>-<avx flag>-simtel<sim_telarray version>`
diff --git a/docs/changes/1954.feature.md b/docs/changes/1954.feature.md
new file mode 100644
index 0000000000..c4efde1f0c
--- /dev/null
+++ b/docs/changes/1954.feature.md
@@ -0,0 +1,3 @@
+Add building workflow for simtools-prod image.
+Update docker files and building workflows for CORSIKA, sim_telarray, and simtools.
+Simplify package naming.

From 293b74b9e3e2d8642a865abd811c2940dfc96d22 Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 17:05:15 +0100
Subject: [PATCH 14/19] api

---
 docs/changes/1954.api.md | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/docs/changes/1954.api.md b/docs/changes/1954.api.md
index ff4810fcd2..aa1809e924 100644
--- a/docs/changes/1954.api.md
+++ b/docs/changes/1954.api.md
@@ -1,6 +1,6 @@
 Change in naming of simtools docker images:
 
-- [CORSIKA image](https://github.com/gammasim/simtools/pkgs/container/corsika7) is now called e.g. `ghcr.io/gammasim/corsika7:0.26.0-78010-avx512f`
-- [sim_telarray image](https://github.com/gammasim/simtools/pkgs/container/sim_telarray) is now called e.g. `ghcr.io/gammasim/sim_telarray:0.26.0-<sim_telarray version>`
-- [simtools-dev image](https://github.com/gammasim/simtools/pkgs/container/simtools-dev) is now called e.g. `ghcr.io/gammasim/simtools-dev:latest` (save to use the latest tag here)
-- [simtools-prod image](https://github.com/gammasim/simtools/pkgs/container/simtools-prod) is now called e.g. `ghcr.io/gammasim/simtools-prod:0.26.0-corsika<corsika version>-<avx flag>-simtel<sim_telarray version>`
+- [CORSIKA image](https://github.com/gammasim/simtools/pkgs/container/corsika7) is called e.g. `ghcr.io/gammasim/corsika7:0.26.0-78010-avx512f`
+- [sim_telarray image](https://github.com/gammasim/simtools/pkgs/container/sim_telarray) is called e.g. `ghcr.io/gammasim/sim_telarray:0.26.0-<sim_telarray version>`
+- [simtools-dev image](https://github.com/gammasim/simtools/pkgs/container/simtools-dev) is called e.g. `ghcr.io/gammasim/simtools-dev:latest` (save to use the latest tag here)
+- [simtools-prod image](https://github.com/gammasim/simtools/pkgs/container/simtools-prod) is called e.g. `ghcr.io/gammasim/simtools-prod:0.26.0-corsika<corsika version>-<avx flag>-simtel<sim_telarray version>`

From 6e956d6674ab2612b5195ccf8ce75c0489c7b446 Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 17:10:43 +0100
Subject: [PATCH 15/19] corsika version

---
 .github/workflows/build-simtools-prod.yml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/build-simtools-prod.yml b/.github/workflows/build-simtools-prod.yml
index 5dcbc4e5b7..3ca45d658e 100644
--- a/.github/workflows/build-simtools-prod.yml
+++ b/.github/workflows/build-simtools-prod.yml
@@ -25,10 +25,10 @@ jobs:
     strategy:
       matrix:
         version:
-          - {corsika: '78010', avx_flag: 'no_opt', simtel_image: 'latest'}
-          - {corsika: '78010', avx_flag: 'avx2', simtel_image: 'latest'}
-          - {corsika: '78010', avx_flag: 'avx512f', simtel_image: 'latest'}
-          - {corsika: '78010', avx_flag: 'sse4', simtel_image: 'latest'}
+          - {corsika: '20251217-78010', avx_flag: 'no_opt', simtel_image: 'latest'}
+          - {corsika: '20251217-78010', avx_flag: 'avx2', simtel_image: 'latest'}
+          - {corsika: '20251217-78010', avx_flag: 'avx512f', simtel_image: 'latest'}
+          - {corsika: '20251217-78010', avx_flag: 'sse4', simtel_image: 'latest'}
     env:
       BASE_LABEL: "simtools-prod"
       BASE_TAG: "corsika${{ matrix.version.corsika }}-${{ matrix.version.avx_flag }}-simtel${{ matrix.version.simtel_image }}"

From 0ce52f28d4afa99fc55fe26245edb34b40ec03ac Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 17:40:23 +0100
Subject: [PATCH 16/19] add gcc

---
 docker/Dockerfile-simtools-prod | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docker/Dockerfile-simtools-prod b/docker/Dockerfile-simtools-prod
index 82bd4b212d..2f3d809b1d 100644
--- a/docker/Dockerfile-simtools-prod
+++ b/docker/Dockerfile-simtools-prod
@@ -26,7 +26,7 @@ COPY --from=simtel_img /workdir/simulation_software/hessioxxx /workdir/simulatio
 COPY --from=simtel_img /workdir/simulation_software/stdtools /workdir/simulation_software/stdtools
 
 RUN microdnf update -y && microdnf install -y \
-    bc findutils git gsl-devel libgfortran procps zstd \
+    bc findutils gcc-c++ git gsl libgfortran procps wget zstd \
     python${PYTHON_VERSION} python${PYTHON_VERSION}-pip python${PYTHON_VERSION}-devel && \
     microdnf clean all && \
     rm -rf /var/cache/dnf/* /tmp/* /var/tmp/* && \

From cc0bcd787695cc8dddfdbb2968dd45df98bac787 Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Wed, 17 Dec 2025 20:43:07 +0100
Subject: [PATCH 17/19] add back prod6

---
 docker/Dockerfile-simtel_array | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docker/Dockerfile-simtel_array b/docker/Dockerfile-simtel_array
index d91131f48b..532732ad9f 100644
--- a/docker/Dockerfile-simtel_array
+++ b/docker/Dockerfile-simtel_array
@@ -4,7 +4,7 @@
 # Image with sim_telarray and tools.
 #
 
-ARG EXTRA_DEFINES="-DMAXIMUM_TELESCOPES=99"
+ARG EXTRA_DEFINES="-DCTA_PROD6 -DMAXIMUM_TELESCOPES=99"
 ARG SIMTEL_VERSION="master"
 ARG HESSIO_VERSION="master"
 ARG STDTOOLS_VERSION="master"

From 7a1c8d8df76066205aacd1fb28b6f1dd5ec8dc11 Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Thu, 18 Dec 2025 09:54:47 +0100
Subject: [PATCH 18/19] copilot comments

---
 .github/workflows/build-simtools-prod.yml | 2 +-
 docker/Dockerfile-corsika7                | 2 +-
 docker/Dockerfile-simtools-prod           | 3 ++-
 docs/changes/1954.api.md                  | 2 +-
 4 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/build-simtools-prod.yml b/.github/workflows/build-simtools-prod.yml
index 3ca45d658e..c1c6857ea3 100644
--- a/.github/workflows/build-simtools-prod.yml
+++ b/.github/workflows/build-simtools-prod.yml
@@ -31,7 +31,7 @@ jobs:
           - {corsika: '20251217-78010', avx_flag: 'sse4', simtel_image: 'latest'}
     env:
       BASE_LABEL: "simtools-prod"
-      BASE_TAG: "corsika${{ matrix.version.corsika }}-${{ matrix.version.avx_flag }}-simtel${{ matrix.version.simtel_image }}"
+      BASE_TAG: "corsika-${{ matrix.version.corsika }}-${{ matrix.version.avx_flag }}-simtel-${{ matrix.version.simtel_image }}"
 
     steps:
       - name: Checkout repository
diff --git a/docker/Dockerfile-corsika7 b/docker/Dockerfile-corsika7
index f57759c973..0146c2270b 100644
--- a/docker/Dockerfile-corsika7
+++ b/docker/Dockerfile-corsika7
@@ -39,7 +39,7 @@ WORKDIR /src
 
 # Clone CORSIKA configuration files from CTAO gitlab
 RUN git config --global advice.detachedHead false && \
-    git clone --depth 1 --branch "${CORSIKA_CONFIG_VERSION}" "http://${CORSIKA_CONFIG_REPO}" && \
+    git clone --depth 1 --branch "${CORSIKA_CONFIG_VERSION}" "https://${CORSIKA_CONFIG_REPO}" && \
     cp -v corsika7-config/config/${CORSIKA_VERSION}/*.h . && \
     rm -rf corsika7-config
 
diff --git a/docker/Dockerfile-simtools-prod b/docker/Dockerfile-simtools-prod
index 2f3d809b1d..7498bed833 100644
--- a/docker/Dockerfile-simtools-prod
+++ b/docker/Dockerfile-simtools-prod
@@ -1,6 +1,7 @@
 # Dockerfile for simtools production.
 #
-# Uses CORSIKA (no vector optimization) and sim_telarray pre-built images.
+# Uses CORSIKA and sim_telarray pre-built images; CORSIKA AVX optimization
+# (no_opt, avx2, avx512f, sse4) is selected via the AVX_FLAG build argument.
 # No QGSJet tables are included.
 #
 # hadolint global ignore=DL3013,DL3041
diff --git a/docs/changes/1954.api.md b/docs/changes/1954.api.md
index aa1809e924..193cb86151 100644
--- a/docs/changes/1954.api.md
+++ b/docs/changes/1954.api.md
@@ -2,5 +2,5 @@ Change in naming of simtools docker images:
 
 - [CORSIKA image](https://github.com/gammasim/simtools/pkgs/container/corsika7) is called e.g. `ghcr.io/gammasim/corsika7:0.26.0-78010-avx512f`
 - [sim_telarray image](https://github.com/gammasim/simtools/pkgs/container/sim_telarray) is called e.g. `ghcr.io/gammasim/sim_telarray:0.26.0-<sim_telarray version>`
-- [simtools-dev image](https://github.com/gammasim/simtools/pkgs/container/simtools-dev) is called e.g. `ghcr.io/gammasim/simtools-dev:latest` (save to use the latest tag here)
+- [simtools-dev image](https://github.com/gammasim/simtools/pkgs/container/simtools-dev) is called e.g. `ghcr.io/gammasim/simtools-dev:latest` (safe to use the latest tag here)
 - [simtools-prod image](https://github.com/gammasim/simtools/pkgs/container/simtools-prod) is called e.g. `ghcr.io/gammasim/simtools-prod:0.26.0-corsika<corsika version>-<avx flag>-simtel<sim_telarray version>`

From 8c783bec7d5ddb1d4cf1bff121e1629bb5907da1 Mon Sep 17 00:00:00 2001
From: Gernot Maier <gernot.maier@desy.de>
Date: Mon, 5 Jan 2026 10:19:12 +0100
Subject: [PATCH 19/19] tmp fix

---
 docker/Dockerfile-corsika7 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docker/Dockerfile-corsika7 b/docker/Dockerfile-corsika7
index 0146c2270b..733374339d 100644
--- a/docker/Dockerfile-corsika7
+++ b/docker/Dockerfile-corsika7
@@ -47,7 +47,7 @@ RUN git config --global advice.detachedHead false && \
 RUN --mount=type=secret,id=corsika7_token \
     CORSIKA7_TAG="v$(echo "${CORSIKA_VERSION}" | cut -c1).$(echo "${CORSIKA_VERSION}" | cut -c2-)" && \
     git config --global advice.detachedHead false && \
-    git clone --depth 1 --branch "${CORSIKA7_TAG}" "https://oauth2:$(cat /run/secrets/corsika7_token)@${CORSIKA_REPO}"
+    GIT_SSL_NO_VERIFY=1 git clone --depth 1 --branch "${CORSIKA7_TAG}" "https://oauth2:$(cat /run/secrets/corsika7_token)@${CORSIKA_REPO}"
 
 # Clone CORSIKA optimization patches from CTAO gitlab
 RUN git config --global advice.detachedHead false && \