From cf90704eb70bde9c83894f241a16935bbce59444 Mon Sep 17 00:00:00 2001
From: samuelburnham <45365069+samuelburnham@users.noreply.github.com>
Date: Wed, 2 Sep 2026 13:58:52 -0400
Subject: [PATCH 1/3] Test PR

---
 .github/workflows/lean_action_ci.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/lean_action_ci.yml b/.github/workflows/lean_action_ci.yml
index 52c9a6b..ae50348 100644
--- a/.github/workflows/lean_action_ci.yml
+++ b/.github/workflows/lean_action_ci.yml
@@ -1,3 +1,4 @@
+# Test
 name: Lean Action CI
 
 on:

From c21f958a73da550234563cd96f48763bf39bf969 Mon Sep 17 00:00:00 2001
From: samuelburnham <45365069+samuelburnham@users.noreply.github.com>
Date: Wed, 2 Sep 2026 21:58:56 -0400
Subject: [PATCH 2/3] Trigger merge-test failure

---
 .github/merge-tests-fail-unit | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 .github/merge-tests-fail-unit

diff --git a/.github/merge-tests-fail-unit b/.github/merge-tests-fail-unit
new file mode 100644
index 0000000..c3813a5
--- /dev/null
+++ b/.github/merge-tests-fail-unit
@@ -0,0 +1 @@
+intentional failure

From 17f3ca8c075db5a23169cb6640dc2d2677fcb7c0 Mon Sep 17 00:00:00 2001
From: samuelburnham <45365069+samuelburnham@users.noreply.github.com>
Date: Thu, 3 Sep 2026 10:19:05 -0400
Subject: [PATCH 3/3] Log namespace runner specs

---
 .github/actions/log-cpu/action.yml  | 52 +++++++++++++++++++++++++++++
 .github/workflows/namespace-cpu.yml | 28 ++++++++++++++++
 2 files changed, 80 insertions(+)
 create mode 100644 .github/actions/log-cpu/action.yml
 create mode 100644 .github/workflows/namespace-cpu.yml

diff --git a/.github/actions/log-cpu/action.yml b/.github/actions/log-cpu/action.yml
new file mode 100644
index 0000000..ada8c9f
--- /dev/null
+++ b/.github/actions/log-cpu/action.yml
@@ -0,0 +1,52 @@
+name: Log CPU information
+description: Log the current host's CPU and effective cgroup allocation
+
+inputs:
+  label:
+    description: Heading and context for the CPU report
+    required: false
+    default: CPU information
+
+outputs:
+  summary:
+    description: CPU model, effective vCPU count, and total RAM
+    value: ${{ steps.report.outputs.summary }}
+
+runs:
+  using: composite
+  steps:
+    - id: report
+      shell: bash
+      env:
+        CPU_LABEL: ${{ inputs.label }}
+      run: |
+        set -euo pipefail
+        export LC_ALL=C
+
+        cpu_info=$(lscpu)
+        cpu_model=$(printf '%s\n' "$cpu_info" | awk -F ': *' '/^Model name:/ { print $2; exit }')
+        vcpus=$(nproc)
+        ram_kib=$(awk '/^MemTotal:/ { print $2; exit }' /proc/meminfo)
+        ram=$(awk -v kib="$ram_kib" 'BEGIN { printf "%.1f GiB", kib / 1048576 }')
+
+        echo "::group::$CPU_LABEL"
+        echo "Context: $CPU_LABEL"
+        echo "Runner: ${RUNNER_NAME:-unknown} (${RUNNER_OS:-unknown}/${RUNNER_ARCH:-unknown})"
+        echo "Kernel: $(uname -srvm)"
+        echo "nproc: $vcpus"
+        echo "RAM: $ram"
+        if [ -r /sys/fs/cgroup/cpu.max ]; then
+          echo "cgroup cpu.max: $(< /sys/fs/cgroup/cpu.max)"
+        fi
+        if [ -r /sys/fs/cgroup/cpuset.cpus.effective ]; then
+          echo "cgroup cpuset.cpus.effective: $(< /sys/fs/cgroup/cpuset.cpus.effective)"
+        fi
+        grep -m1 '^Cpus_allowed_list:' /proc/self/status || true
+        printf '%s\n' "$cpu_info"
+        flags=$({ grep -m1 -oE 'avx2|avx512[a-z0-9_]*' /proc/cpuinfo || true; } \
+          | sort -u | tr '\n' ' ')
+        echo "AVX flags: ${flags:-absent}"
+        echo "::endgroup::"
+
+        printf 'summary=CPU: `%s` · vCPUs: `%s` · RAM: `%s`\n' \
+          "${cpu_model:-unknown}" "$vcpus" "$ram" >> "$GITHUB_OUTPUT"
diff --git a/.github/workflows/namespace-cpu.yml b/.github/workflows/namespace-cpu.yml
new file mode 100644
index 0000000..c36f3f9
--- /dev/null
+++ b/.github/workflows/namespace-cpu.yml
@@ -0,0 +1,28 @@
+name: Namespace CPU information
+
+on:
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  log-cpu:
+    name: CPU ${{ matrix.shape }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - shape: 8x16
+            runner: nscloud-ubuntu-26.04-amd64-8x16
+          - shape: 16x32
+            runner: nscloud-ubuntu-26.04-amd64-16x32
+          - shape: 32x64
+            runner: nscloud-ubuntu-26.04-amd64-32x64
+    runs-on: ${{ matrix.runner }}
+    timeout-minutes: 5
+    steps:
+      - uses: actions/checkout@v7
+      - uses: ./.github/actions/log-cpu
+        with:
+          label: Namespace Ubuntu 26.04 ${{ matrix.shape }}