fix(packages): add types/typesVersions for legacy moduleResolution: node (#1898)

Author: felixweinberger

.changeset/legacy-module-resolution-types.md

@@ -0,0 +1,10 @@
+---
+'@modelcontextprotocol/client': patch
+'@modelcontextprotocol/server': patch
+'@modelcontextprotocol/node': patch
+'@modelcontextprotocol/express': patch
+'@modelcontextprotocol/fastify': patch
+'@modelcontextprotocol/hono': patch
+---
+
+Add top-level `types` field (and `typesVersions` on client/server for their subpath exports) so consumers on legacy `moduleResolution: "node"` can resolve type declarations. The `exports` map remains the source of truth for `nodenext`/`bundler` resolution. The `typesVersions` map includes entries for subpaths added by sibling PRs in this series (`zod-schemas`, `stdio`); those entries are no-ops until the corresponding `dist/*.d.mts` files exist.

packages/client/package.json

@@ -47,6 +47,17 @@
             }
         }
     },
+    "types": "./dist/index.d.mts",
+    "typesVersions": {
+        "*": {
+            "validators/cf-worker": [
+                "dist/validators/cfWorker.d.mts"
+            ],
+            "stdio": [
+                "dist/stdio.d.mts"
+            ]
+        }
+    },
     "files": [
         "dist"
     ],

packages/middleware/express/package.json

@@ -27,6 +27,7 @@
             "import": "./dist/index.mjs"
         }
     },
+    "types": "./dist/index.d.mts",
     "files": [
         "dist"
     ],

packages/middleware/fastify/package.json

@@ -27,6 +27,7 @@
             "import": "./dist/index.mjs"
         }
     },
+    "types": "./dist/index.d.mts",
     "files": [
         "dist"
     ],

packages/middleware/hono/package.json

@@ -27,6 +27,7 @@
             "import": "./dist/index.mjs"
         }
     },
+    "types": "./dist/index.d.mts",
     "files": [
         "dist"
     ],

packages/middleware/node/package.json

@@ -26,6 +26,14 @@
             "import": "./dist/index.mjs"
         }
     },
+    "types": "./dist/index.d.mts",
+    "typesVersions": {
+        "*": {
+            "sse": [
+                "dist/sse.d.mts"
+            ]
+        }
+    },
     "files": [
         "dist"
     ],

packages/server/package.json

@@ -47,6 +47,20 @@
             }
         }
     },
+    "types": "./dist/index.d.mts",
+    "typesVersions": {
+        "*": {
+            "validators/cf-worker": [
+                "dist/validators/cfWorker.d.mts"
+            ],
+            "zod-schemas": [
+                "dist/zodSchemas.d.mts"
+            ],
+            "stdio": [
+                "dist/stdio.d.mts"
+            ]
+        }
+    },
     "files": [
         "dist"
     ],