OpenCyphal · thirtytwobits · Jul 26, 2026 · Feb 8, 2026 · Feb 8, 2026 · Feb 8, 2026
diff --git a/.github/workflows/toolshed.yml b/.github/workflows/toolshed.yml
@@ -10,6 +10,7 @@ on:
 env:
   REGISTRY_IMAGE: ghcr.io/opencyphal/toolshed
   IMAGE_VERSION_PREFIX: ts
+  IMAGE_DESCRIPTION: Provides a consistent build and test environment for development, continuous-integration, and test automation of OpenCyphal C and C++ based projects.
 
 jobs:
   release-ts-amd64:
@@ -179,7 +180,11 @@ jobs:
       - name: Create manifest list and push
         working-directory: /tmp/digests
         run: |
-          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+          docker buildx imagetools create \
+            --annotation "index:org.opencontainers.image.source=https://github.com/OpenCyphal/docker_toolchains" \
+            --annotation "index:org.opencontainers.image.description=${{ env.IMAGE_DESCRIPTION }}" \
+            --annotation "index:org.opencontainers.image.licenses=MIT" \
+            $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
             $(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)
 
       - name: Inspect image

diff --git a/README.md b/README.md
@@ -21,25 +21,33 @@ is based on Ubuntu and provides the necessary compilers and utilities to build a
 like [libcanard](https://github.com/OpenCyphal/libcanard) and
 [Nunavut](https://github.com/OpenCyphal/nunavut).
 
+See [toolshed/README.md](toolshed/README.md) for build instructions and
+[toolshed/CHANGELOG.md](toolshed/CHANGELOG.md) for per-release notes.
+
 #### Supported Versions
 
 | tag      | Python | GCC (native) | GCC (arm-none-eabi) | Clang (native) | Cmake | Host Platforms | Other Utilities |
 |----------|--------|--------------|---------------------|----------------|-------|----------------|-----------------|
+| [ts26.4.1](https://github.com/OpenCyphal/docker_toolchains/pkgs/container/toolshed) | 3.14 | 15.2.0 | 14.2.rel1 | 22.1.2 | 4.2.3 | <ul><li>linux/amd64</li><li>linux/arm64</li></ul> | <ul><li>Rust 1.93.1</li><li>Go 1.26</li><li>Node.js 22.22.1</li><li>TypeScript 5.2.2</li><li>Emscripten SDK 6.0.2</li><li>LLVM 22.1.2</li><li>MLIR 22.1.2</li><li>JLink V816</li><li>cppcheck</li><li>yakut</li><li>libpcap0.8-dev</li><li>network-tools</li><li>can-utils</li><li>doxygen 1.13.2</li><li>tox</li><li>nox</li><li>gcovr</li><li>lit</li><li>gcc-multilib (amd64 only)</li></ul> |
 | [ts24.4.3](https://github.com/OpenCyphal/docker_toolchains/pkgs/container/toolshed) | <ul><li>3.12</li><li>3.10</li></ul> | <ul><li>13.3.0</li><li>12.3.0</li><li>11.4.0</li><li>10.5.0</li><li>7.5.0</li></ul>| 13.3.1 | <ul><li>19.1.7</li><li>18.1.8</li></ul> | 3.31.5 | <ul><li>linux/amd64</li><li>linux/arm64</li></ul> | <ul><li>JLink V816</li><li>cppcheck-2.13</li><li>yakut 0.13.0</li><li>libpcap0.8-dev</li><li>network-tools</li><li>can-utils</li><li>doxygen 1.13.2</li><li>tox</li><li>nox</li><li>govr</li><li>gcc-multilib (amd64 only)</li></ul> |
 | [ts24.4.2](https://github.com/OpenCyphal/docker_toolchains/pkgs/container/toolshed) | <ul><li>3.12</li><li>3.10</li></ul> | <ul><li>13.3.0</li><li>12.3.0</li><li>11.4.0</li><li>10.5.0</li><li>7.5.0</li></ul>| 13.3.1 | <ul><li>19.1.7</li><li>18.1.8</li></ul> | 3.31.5 | <ul><li>linux/amd64</li><li>linux/arm64</li></ul> | <ul><li>yakut 0.13.0</li><li>libpcap0.8-dev</li><li>network-tools</li><li>can-utils</li><li>doxygen 1.13.2</li><li>gcc-multilib (amd64 only)</li></ul> |
-| [ts24.4.1](https://github.com/OpenCyphal/docker_toolchains/pkgs/container/toolshed) | <ul><li>3.12</li><li>3.10</li></ul> | <ul><li>13.3.0</li><li>12.3.0</li><li>11.4.0</li><li>10.5.0</li><li>7.5.0</li></ul>| 13.3.1 | <ul><li>19.1.7</li><li>18.1.8</li></ul> | 3.31.5 | <ul><li>linux/amd64</li><li>linux/arm64</li></ul> | <li>can-utils</li><li>doxygen 1.13.2</li><li>tox</li><li>nox</li><li>govr</li><li>gcc-multilib (amd64 only)</li></ul> |
-| [ts22.4.10](https://github.com/OpenCyphal/docker_toolchains/pkgs/container/toolshed) | 3.10 | 12.3.0 | 13.3.1 | 18.1.3 | 3.30.1 | <ul><li>linux/amd64</li><li>linux/arm64</li></ul> | <ul><li>qemu</li><li>can-utils</li><li>doxygen 1.10.0</li><li>nvm</li><li>node 20.x</li><li>nox</li><li>govr</li><li>gcc-multilib (amd64 only)</li></ul> |
-| [ts22.4.8](https://github.com/OpenCyphal/docker_toolchains/pkgs/container/toolshed) | 3.10 | 12.3.0 | (N/A) | 18.1.3 | 3.22.1 | <ul><li>linux/amd64</li><li>linux/arm64</li></ul> | <ul><li>qemu</li><li>can-utils</li><li>doxygen 1.10.0</li><li>nvm</li><li>node 20.x</li><li>nox</li><li>govr</li><li>gcc-multilib (amd64 only)</li></ul> |
-| [ts22.4.7](https://github.com/OpenCyphal/docker_toolchains/pkgs/container/toolshed) | 3.10 | 12.3.0 | (N/A) | 18.1.3 | 3.22.1 | <ul><li>linux/amd64</li><li>linux/arm64</li></ul> | <ul><li>qemu</li><li>can-utils</li><li>doxygen 1.10.0</li><li>nvm</li><li>node 20.x</li><li>nox</li><li>govr</li></ul> |
+| [ts24.4.1](https://github.com/OpenCyphal/docker_toolchains/pkgs/container/toolshed) | <ul><li>3.12</li><li>3.10</li></ul> | <ul><li>13.3.0</li><li>12.3.0</li><li>11.4.0</li><li>10.5.0</li></ul>| 13.3.1 | <ul><li>19.1.7</li><li>18.1.8</li></ul> | 3.31.5 | <ul><li>linux/amd64</li><li>linux/arm64</li></ul> | <li>can-utils</li><li>doxygen 1.13.2</li><li>tox</li><li>nox</li><li>gcovr</li><li>gcc-multilib (amd64 only)</li></ul> |
+| [ts22.4.10](https://github.com/OpenCyphal/docker_toolchains/pkgs/container/toolshed) | 3.10 | 12.3.0 | 13.3.1 | 18.1.3 | 3.30.1 | <ul><li>linux/amd64</li><li>linux/arm64</li></ul> | <ul><li>qemu</li><li>can-utils</li><li>doxygen 1.10.0</li><li>nvm</li><li>node 20.x</li><li>nox</li><li>gcovr</li><li>gcc-multilib (amd64 only)</li></ul> |
+| [ts22.4.8](https://github.com/OpenCyphal/docker_toolchains/pkgs/container/toolshed) | 3.10 | 12.3.0 | (N/A) | 18.1.3 | 3.22.1 | <ul><li>linux/amd64</li><li>linux/arm64</li></ul> | <ul><li>qemu</li><li>can-utils</li><li>doxygen 1.10.0</li><li>nvm</li><li>node 20.x</li><li>nox</li><li>gcovr</li><li>gcc-multilib (amd64 only)</li></ul> |
+| [ts22.4.7](https://github.com/OpenCyphal/docker_toolchains/pkgs/container/toolshed) | 3.10 | 12.3.0 | (N/A) | 18.1.3 | 3.22.1 | <ul><li>linux/amd64</li><li>linux/arm64</li></ul> | <ul><li>qemu</li><li>can-utils</li><li>doxygen 1.10.0</li><li>nvm</li><li>node 20.x</li><li>nox</li><li>gcovr</li></ul> |
 
+Starting with `ts26.4.1`, the image sets:
+- `LLVM_DIR=/usr/lib/llvm-22/lib/cmake/llvm`
+- `MLIR_DIR=/usr/lib/llvm-22/lib/cmake/mlir`
+- `CMAKE_PREFIX_PATH=/usr/lib/llvm-22`
 
 You can use this in your workflow yaml like this:
 
 ```none
 jobs:
   my-job:
     runs-on: ubuntu-latest
-    container: ghcr.io/opencyphal/toolshed:ts22.4.7
+    container: ghcr.io/opencyphal/toolshed:ts26.4.1
 ```
 
 

diff --git a/toolshed/CHANGELOG.md b/toolshed/CHANGELOG.md
@@ -0,0 +1,29 @@
+# Changelog — toolshed (ts)
+
+Per-release notes for the `ghcr.io/opencyphal/toolshed` image. The summary table of
+every published tag lives in the [top-level README](../README.md#opencyphaltoolshedts).
+
+## ts26.4.1
+
+Rebases toolshed onto Ubuntu 26.04 LTS and keeps only the latest native toolchain
+families provided by that base:
+
+- Python 3.14
+- GCC 15
+- CMake 4.2
+- Ninja 1.13
+- LLVM, Clang, and MLIR 22, including `libmlir-22-dev` and `mlir-22-tools`
+
+Also adds:
+
+- Rust
+- Go
+- Node.js and TypeScript
+- Emscripten SDK 6.0.2, Binaryen, and WABT
+- libcurl development headers for LLVM/MLIR CMake consumers
+- libedit development headers for LLVM/MLIR CMake consumers
+- Python package `lit`
+
+Exports `LLVM_DIR`, `MLIR_DIR`, and `CMAKE_PREFIX_PATH` defaults for CMake-based
+LLVM/MLIR builds. See the
+[top-level README](../README.md#opencyphaltoolshedts) for the current values.
diff --git a/toolshed/Dockerfile b/toolshed/Dockerfile
@@ -1,7 +1,7 @@
 #
-# Builds the toolshed/ubuntu-22.04 toolchain container.
+# Builds the toolshed/ubuntu-26.04 toolchain container.
 #
-FROM ubuntu:24.04 AS base
+FROM ubuntu:26.04 AS base
 
 LABEL org.opencontainers.image.source=https://github.com/OpenCyphal/docker_toolchains
 LABEL org.opencontainers.image.description="Provides a consistent build and test environment for development, continuous-integration, and test automation of OpenCyphal C and C++ based projects."
@@ -16,14 +16,17 @@ WORKDIR /repo
 ENV LANG=en_US.UTF-8
 ENV LANGUAGE=en_US:en
 ENV LC_ALL=en_US.UTF-8
+ENV TOOLSHED_LLVM_VERSION=22
+ENV LLVM_DIR=/usr/lib/llvm-22/lib/cmake/llvm
+ENV MLIR_DIR=/usr/lib/llvm-22/lib/cmake/mlir
+ENV CMAKE_PREFIX_PATH=/usr/lib/llvm-22
 
 
 # +---------------------------------------------------------------------------+
 # | UBUNTU PROVISIONING
 # +---------------------------------------------------------------------------+
 FROM base AS provisioning
 WORKDIR /tmp
-ADD kitware-archive-latest.asc .
 ADD pre-provision.sh ./pre-provision.sh
 ADD provision-repositories.sh ./provision-repositories.sh
 ADD provision-repositories-${TARGETARCH}.sh ./provision-repositories-${TARGETARCH}.sh
@@ -49,17 +52,66 @@ RUN echo "export PATH=$PATH" >> ~/.bashrc
 FROM provisioning AS llvm
 WORKDIR /tmp
 
-ADD llvm-install.sh ./llvm-install.sh
 ADD llvm-select.sh ./llvm-select.sh
-RUN ./llvm-install.sh 18 all
-RUN ./llvm-select.sh 18 18
-RUN ./llvm-install.sh 19 all
-RUN ./llvm-select.sh 19 99
+ADD mlir-select.sh ./mlir-select.sh
+RUN apt-get -y install \
+    clang-${TOOLSHED_LLVM_VERSION} \
+    clangd-${TOOLSHED_LLVM_VERSION} \
+    clang-format-${TOOLSHED_LLVM_VERSION} \
+    clang-tidy-${TOOLSHED_LLVM_VERSION} \
+    clang-tools-${TOOLSHED_LLVM_VERSION} \
+    lld-${TOOLSHED_LLVM_VERSION} \
+    lldb-${TOOLSHED_LLVM_VERSION} \
+    llvm-${TOOLSHED_LLVM_VERSION}-dev \
+    llvm-${TOOLSHED_LLVM_VERSION}-tools \
+    libomp-${TOOLSHED_LLVM_VERSION}-dev \
+    libc++-${TOOLSHED_LLVM_VERSION}-dev \
+    libc++abi-${TOOLSHED_LLVM_VERSION}-dev \
+    libclang-common-${TOOLSHED_LLVM_VERSION}-dev \
+    libclang-${TOOLSHED_LLVM_VERSION}-dev \
+    libclang-cpp${TOOLSHED_LLVM_VERSION}-dev \
+    libclang-rt-${TOOLSHED_LLVM_VERSION}-dev \
+    libpolly-${TOOLSHED_LLVM_VERSION}-dev \
+    libunwind-${TOOLSHED_LLVM_VERSION}-dev \
+    libmlir-${TOOLSHED_LLVM_VERSION}-dev \
+    mlir-${TOOLSHED_LLVM_VERSION}-tools
+RUN ./llvm-select.sh ${TOOLSHED_LLVM_VERSION} 99
+RUN ./mlir-select.sh ${TOOLSHED_LLVM_VERSION} 99
+RUN dpkg-query -W libmlir-${TOOLSHED_LLVM_VERSION}-dev mlir-${TOOLSHED_LLVM_VERSION}-tools
+RUN mkdir -p /usr/lib/cmake \
+    && ln -sfn /usr/lib/llvm-${TOOLSHED_LLVM_VERSION}/lib/cmake/llvm /usr/lib/cmake/llvm \
+    && ln -sfn /usr/lib/llvm-${TOOLSHED_LLVM_VERSION}/lib/cmake/mlir /usr/lib/cmake/mlir
+RUN mkdir -p /tmp/cmake-find-mlir \
+    && printf '%s\n' \
+        'cmake_minimum_required(VERSION 3.20)' \
+        'project(FindMLIR LANGUAGES C CXX)' \
+        'find_package(CURL REQUIRED)' \
+        'find_package(MLIR CONFIG REQUIRED)' \
+        'find_package(LibEdit REQUIRED)' \
+        'message(STATUS CURL_LIBRARIES_FROM_CMAKE=${CURL_LIBRARIES})' \
+        'message(STATUS LibEdit_LIBRARIES_FROM_CMAKE=${LibEdit_LIBRARIES})' \
+        'message(STATUS MLIR_DIR_FROM_CMAKE=${MLIR_DIR})' \
+        > /tmp/cmake-find-mlir/CMakeLists.txt \
+    && env -u MLIR_DIR -u CMAKE_PREFIX_PATH cmake -S /tmp/cmake-find-mlir -B /tmp/cmake-find-mlir-build \
+    && rm -rf /tmp/cmake-find-mlir /tmp/cmake-find-mlir-build
+
+# +---------------------------------------------------------------------------+
+# | WASM/EMSCRIPTEN
+# +---------------------------------------------------------------------------+
+FROM llvm AS wasm
+WORKDIR /tmp
+
+ARG EMSDK_VERSION=6.0.2
+ENV EMSDK=/opt/emsdk
+RUN git clone --depth 1 --branch ${EMSDK_VERSION} https://github.com/emscripten-core/emsdk.git ${EMSDK}
+RUN ${EMSDK}/emsdk install ${EMSDK_VERSION}
+RUN ${EMSDK}/emsdk activate ${EMSDK_VERSION}
+ENV PATH=${EMSDK}:${EMSDK}/upstream/emscripten:${PATH}
 
 # +---------------------------------------------------------------------------+
 # | DOXYGEN BUILD (PARALLEL)
 # +---------------------------------------------------------------------------+
-FROM llvm AS doxygen
+FROM wasm AS doxygen
 WORKDIR /tmp
 RUN mkdir doxygen-Release
 RUN mkdir doxygen-Release/build
@@ -93,13 +145,8 @@ FROM doxygen AS gcc-select
 
 WORKDIR /tmp
 
-ADD gcc-select.sh ./gcc-select.sh
-RUN ./gcc-select.sh 7 7
-RUN ./gcc-select.sh 10 10
-RUN ./gcc-select.sh 11 11
-RUN ./gcc-select.sh 12 12
-RUN ./gcc-select.sh 13 99
-RUN update-alternatives --display gcc
+RUN gcc --version
+RUN g++ --version
 
 # +---------------------------------------------------------------------------+
 # | arm-none-eabi-gcc
@@ -161,8 +208,17 @@ RUN echo "export PATH=$PIPX_HOME:$PIPX_BIN_DIR:$PATH" >> ~/.bashrc
 RUN pipx install cowsay
 RUN pipx install tox
 RUN pipx install nox
-RUN pipx install gcovr
+RUN pip install --break-system-packages gcovr
 RUN pipx install yakut
+RUN pipx install lit
+RUN rustc --version
+RUN cargo --version
+RUN go version
+RUN node --version
+RUN npm --version
+RUN tsc --version
+RUN emcc --version
+RUN lit --version
 RUN cowsay -t moo
 RUN git clone --depth 1 https://github.com/OpenCyphal/public_regulated_data_types.git ~/public_regulated_data_types