Complete local voxel MVP with server, client, MCP, packages and world interchange

.github/workflows/ci.yml

@@ -1,18 +1,27 @@
-name: Core checks
+name: MVP checks
 on:
   push:
   pull_request:
 permissions:
   contents: read
 jobs:
-  storage:
+  mvp:
     runs-on: ubuntu-latest
+    timeout-minutes: 15
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           toolchain: 1.96.0
           components: rustfmt, clippy
-      - name: Verify storage and crash recovery
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+      - name: Verify core, server, client and crash recovery
         run: bash scripts/verify.sh
-
+      - name: Install independent MCP test client
+        run: npm install --prefix artifacts/mcp-sdk --no-package-lock @modelcontextprotocol/sdk@1.30.0
+      - name: Verify real stdio MCP interoperability
+        env:
+          SHACRAFT_MCP_SDK: ${{ github.workspace }}/artifacts/mcp-sdk/node_modules/@modelcontextprotocol/sdk
+        run: node scripts/check_mcp.mjs --binary target/debug/shacraft-server --output artifacts/mcp-sdk.json