Add CI that leverages bot:status last_build to see if all targets have (appropriately) been built for

.github/workflows/check_build_status.yml

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+# documentation: https://help.github.com/en/articles/workflow-syntax-for-github-actions
+#
+# This workflow checks the bot's status table (posted in PR comments) to verify
+# that all supported CPU targets have been successfully built before deployment.
+name: Check bot build status
+on:
+  issue_comment:
+    types: [created, edited]
+permissions:
+  contents: read # to fetch code (actions/checkout)
+jobs:
+  check_builds:
+    if: >
+      github.event.issue.pull_request &&
+      contains(github.event.comment.body, 'This is the status of all the `bot: build` commands:')
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Check out software-layer repository (shallow)
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+        with:
+          fetch-depth: 1
+      - name: Check bot build status
+        # We pass the comment body via env variable instead of a command-line argument
+        # because the body contains special characters (pipes |, backticks, newlines, etc.)
+        # that would need complex quoting/escaping in bash. Passing via env is safer
+        # and preserves the content exactly as-is. The Python script reads both
+        # PR_NUMBER and COMMENT_BODY from the environment.
+        env:
+          PR_NUMBER: ${{ github.event.issue.number }}
+          COMMENT_BODY: ${{ github.event.comment.body }}
+        run: |
+          python3 .github/workflows/scripts/check_builds.py

.github/workflows/eessi_targets.toml

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+# Supported targets per EESSI version, shared by the CI workflows and scripts.
+#
+# cpu_targets: should correspond with the table @ https://eessi.io/docs/software_layer/cpu_targets/
+#   Per EESSI version, the CPU targets for each CPU family.
+# accelerator_targets: should correspond with the table @ https://eessi.io/docs/software_layer/gpu_targets/
+#   Per EESSI version, the accelerator targets to build for. 'default' applies to every CPU target,
+#   unless a CPU target has an entry of its own (which may be empty, i.e. no accelerators).
+
+[cpu_targets."2023.06"]
+aarch64 = [
+  "aarch64/a64fx",
+  "aarch64/generic",
+  "aarch64/neoverse_n1",
+  "aarch64/neoverse_v1",
+  "aarch64/nvidia/grace",
+]
+x86_64 = [
+  "x86_64/amd/zen2",
+  "x86_64/amd/zen3",
+  "x86_64/amd/zen4",
+  "x86_64/generic",
+  "x86_64/intel/cascadelake",
+  "x86_64/intel/haswell",
+  "x86_64/intel/icelake",
+  "x86_64/intel/sapphirerapids",
+  "x86_64/intel/skylake_avx512",
+]
+
+[cpu_targets."2025.06"]
+aarch64 = [
+  "aarch64/a64fx",
+  "aarch64/generic",
+  "aarch64/neoverse_n1",
+  "aarch64/neoverse_v1",
+  "aarch64/nvidia/grace",
+]
+x86_64 = [
+  "x86_64/amd/zen2",
+  "x86_64/amd/zen3",
+  "x86_64/amd/zen4",
+  "x86_64/amd/zen5",
+  "x86_64/generic",
+  "x86_64/intel/cascadelake",
+  "x86_64/intel/haswell",
+  "x86_64/intel/icelake",
+  "x86_64/intel/sapphirerapids",
+  "x86_64/intel/skylake_avx512",
+]
+
+[cpu_targets."2026.06"]
+aarch64 = [
+  "aarch64/a64fx",
+  "aarch64/aws/graviton4",
+  "aarch64/generic",
+  "aarch64/neoverse_n1",
+  "aarch64/neoverse_v1",
+  "aarch64/nvidia/grace",
+]
+x86_64 = [
+  "x86_64/amd/zen2",
+  "x86_64/amd/zen3",
+  "x86_64/amd/zen4",
+  "x86_64/amd/zen5",
+  "x86_64/generic",
+  "x86_64/intel/cascadelake",
+  "x86_64/intel/graniterapids",
+  "x86_64/intel/haswell",
+  "x86_64/intel/icelake",
+  "x86_64/intel/sapphirerapids",
+  "x86_64/intel/skylake_avx512",
+]
+
+[accelerator_targets."2023.06"]
+# Provide a default set of compute capabilities
+default = [
+  "nvidia/cc70",
+  "nvidia/cc80",
+  "nvidia/cc90",
+]
+# and then allow for special cases for specific CPU targets
+"aarch64/a64fx" = []
+"x86_64/amd/zen2" = [
+  "nvidia/cc70",
+  "nvidia/cc80",
+  "nvidia/cc90",
+]
+
+[accelerator_targets."2025.06"]
+# Provide a default set of compute capabilities
+default = [
+  "amd/gfx1030",
+  "amd/gfx1100",
+  "amd/gfx1101",
+  "amd/gfx1200",
+  "amd/gfx1201",
+  "amd/gfx908",
+  "amd/gfx90a",
+  "amd/gfx942",
+  "nvidia/cc100",
+  "nvidia/cc120",
+  "nvidia/cc70",
+  "nvidia/cc80",
+  "nvidia/cc90",
+]
+# and then allow for special cases for specific CPU targets
+"aarch64/a64fx" = []
+"aarch64/generic" = [
+  "nvidia/cc100",
+  "nvidia/cc120",
+  "nvidia/cc70",
+  "nvidia/cc80",
+  "nvidia/cc90",
+]
+"aarch64/neoverse_n1" = [
+  "nvidia/cc100",
+  "nvidia/cc120",
+  "nvidia/cc70",
+  "nvidia/cc80",
+  "nvidia/cc90",
+]
+"aarch64/neoverse_v1" = [
+  "nvidia/cc100",
+  "nvidia/cc120",
+  "nvidia/cc70",
+  "nvidia/cc80",
+  "nvidia/cc90",
+]
+"aarch64/nvidia/grace" = [
+  "nvidia/cc100",
+  "nvidia/cc120",
+  "nvidia/cc70",
+  "nvidia/cc80",
+  "nvidia/cc90",
+]
+
+[accelerator_targets."2026.06"]
+# Provide a default set of compute capabilities
+default = [
+  "amd/gfx1030",
+  "amd/gfx1100",
+  "amd/gfx1101",
+  "amd/gfx1200",
+  "amd/gfx1201",
+  "amd/gfx908",
+  "amd/gfx90a",
+  "amd/gfx942",
+  "nvidia/cc100",
+  "nvidia/cc120",
+  "nvidia/cc75",
+  "nvidia/cc80",
+  "nvidia/cc90",
+]
+# and then allow for special cases for specific CPU targets
+"aarch64/a64fx" = []
+"aarch64/generic" = [
+  "nvidia/cc100",
+  "nvidia/cc120",
+  "nvidia/cc75",
+  "nvidia/cc80",
+  "nvidia/cc90",
+]
+"aarch64/neoverse_n1" = [
+  "nvidia/cc100",
+  "nvidia/cc120",
+  "nvidia/cc75",
+  "nvidia/cc80",
+  "nvidia/cc90",
+]
+"aarch64/neoverse_v1" = [
+  "nvidia/cc100",
+  "nvidia/cc120",
+  "nvidia/cc75",
+  "nvidia/cc80",
+  "nvidia/cc90",
+]
+"aarch64/nvidia/grace" = [
+  "nvidia/cc100",
+  "nvidia/cc120",
+  "nvidia/cc75",
+  "nvidia/cc80",
+  "nvidia/cc90",
+]