refactor: move the schema source modules into @modelcontextprotocol/core (#2477)

packages/server-legacy/package.json

@@ -83,6 +83,7 @@
         "test:watch": "vitest"
     },
     "dependencies": {
+        "@modelcontextprotocol/core": "workspace:*",
         "zod": "catalog:runtimeShared",
         "raw-body": "catalog:runtimeServerOnly",
         "content-type": "catalog:runtimeShared",

packages/server-legacy/tsconfig.json

@@ -6,6 +6,7 @@
         "paths": {
             "*": ["./*"],
             "@modelcontextprotocol/core-internal": ["./node_modules/@modelcontextprotocol/core-internal/src/index.ts"],
+            "@modelcontextprotocol/core/internal": ["./node_modules/@modelcontextprotocol/core/src/internal.ts"],
             "@modelcontextprotocol/core-internal/public": ["./node_modules/@modelcontextprotocol/core-internal/src/exports/public/index.ts"]
         }
     }

packages/server-legacy/tsdown.config.ts

@@ -21,5 +21,9 @@ export default defineConfig({
             }
         }
     },
-    noExternal: ['@modelcontextprotocol/core-internal']
+    noExternal: ['@modelcontextprotocol/core-internal'],
+    // The schema modules live in @modelcontextprotocol/core (a real runtime dependency); the
+    // bundled core-internal shims import them via the './internal' subpath, which must stay an
+    // external import (explicit entry — the tsconfig paths alias would otherwise inline it).
+    external: ['@modelcontextprotocol/core/internal']
 });