Blender-Developer-Tools/.github/workflows/mcp-server.yml at main · TMHSDigital/Blender-Developer-Tools · GitHub

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name: Pinned MCP server check

# The opt-in blender-live-session plugin launches the Blender Lab MCP server
# from live-session/mcp.json: uvx, a full commit pin, and --exclude-newer so
# its dependencies resolve to what was reviewed with that pin (#484). This
# runs that exact command and speaks MCP over stdio (initialize, tools/list).
# No Blender is needed: listing tools does not call them. It goes red when the
# pin stops resolving (upstream history rewrite, repo move) or the server stops
# starting, before plugin users find out.

on:
  workflow_dispatch:
  schedule:
    - cron: "0 8 * * 2"   # weekly, Tuesday 08:00 UTC
  push:
    branches: [main]
    paths:
      - "live-session/**"
      - "tests/check_mcp_server.py"
      - ".github/workflows/mcp-server.yml"
  pull_request:
    branches: [main]
    paths:
      - "live-session/**"
      - "tests/check_mcp_server.py"
      - ".github/workflows/mcp-server.yml"

permissions:
  contents: read

jobs:
  handshake:
    name: Install the pinned server and list its tools
    runs-on: ubuntu-latest
    timeout-minutes: 15
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7

      - uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7
        with:
          python-version: "3.12"

      - name: Install uv
        run: python -m pip install "uv==0.8.5"

      - name: Handshake with the server from live-session/mcp.json
        run: python tests/check_mcp_server.py --timeout 300

  report-scheduled-failure:
    name: Report a failed weekly check
    needs: handshake
    if: always() && github.event_name == 'schedule' && needs.handshake.result != 'success'
    runs-on: ubuntu-latest
    timeout-minutes: 5
    permissions:
      issues: write
    steps:
      - name: Open or update the tracking issue
        env:
          GH_TOKEN: ${{ github.token }}
          GH_REPO: ${{ github.repository }}
          RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
        run: |
          set -euo pipefail
          title="Pinned MCP server no longer installs or starts"
          body="Scheduled run: $RUN_URL

          live-session/mcp.json no longer answers tools/list. Check the upstream repo at the pinned SHA and the dependency resolution under --exclude-newer, then bump or fix the pin (CLAUDE.md, Live MCP vs Headless Harness)."
          num=$(gh issue list --state open --search "\"$title\" in:title" --json number --jq '.[0].number // empty')
          if [ -n "$num" ]; then
            gh issue comment "$num" --body "$body"
          else
            gh issue create --title "$title" --body "$body" --label "bug,ci,priority: high"
          fi