fix(pdf-server): MCPB bundle missing runtime deps + display_name with spaces

`mcpb pack` zips whatever is on disk; in this monorepo all runtime deps
are hoisted to root node_modules, so the published .mcpb shipped without
pdfjs-dist/ajv/express/etc. and crashed on import in Claude Desktop.

build-mcpb.mjs stages dist/ + manifest into a clean temp dir, runs a
non-workspace `npm install --omit=dev --omit=optional` (the new
DOMMatrix polyfill makes @napi-rs/canvas's ~130MB of native binaries
unnecessary), syncs manifest.version to package.json, then packs.
Result: 12.3MB / 38.8MB unpacked, full MCP handshake + tools/list pass.

Also rename display_name "PDF (By Anthropic)" → "pdf-viewer" — spaces
in display_name break MCP App UI rendering for MCPBs in Claude Desktop.

CI now smoke-tests the extracted bundle starts (`dist/index.js --stdio`
prints "Ready") so a deps-less bundle can't ship again.

Author: ochafik

.github/workflows/ci.yml

@@ -103,7 +103,15 @@ jobs:
 
       - name: Build MCPB bundle (pdf-server)
         if: runner.os == 'Linux' && matrix.name == 'Linux x64'
-        run: npx -y @anthropic-ai/mcpb pack
+        run: node build-mcpb.mjs
+        working-directory: examples/pdf-server
+
+      - name: Smoke-test MCPB bundle starts
+        if: runner.os == 'Linux' && matrix.name == 'Linux x64'
+        run: |
+          unzip -q pdf-server.mcpb -d .mcpb-smoke
+          node .mcpb-smoke/dist/index.js --stdio < /dev/null 2>&1 | tee /tmp/mcpb-smoke.log
+          grep -q "Ready" /tmp/mcpb-smoke.log
         working-directory: examples/pdf-server
 
   e2e:

.github/workflows/npm-publish.yml

@@ -159,12 +159,8 @@ jobs:
           cache: npm
       - run: npm ci
 
-      - name: Build pdf-server
-        run: npm run build --workspace examples/pdf-server
-
-      - name: Pack MCPB bundle
-        run: npx -y @anthropic-ai/mcpb pack
-        working-directory: examples/pdf-server
+      - name: Build pdf-server + MCPB bundle
+        run: npm run build:mcpb --workspace examples/pdf-server
 
       - name: Upload MCPB to release
         run: gh release upload "${{ github.event.release.tag_name }}" examples/pdf-server/*.mcpb --clobber

.gitignore

@@ -15,4 +15,6 @@ __pycache__/
 *.pyc
 
 # MCPB bundles (built artifacts)
-*.mcpb
+*.mcpb
+.mcpb-stage/
+.mcpb-smoke/

examples/pdf-server/build-mcpb.mjs

@@ -0,0 +1,56 @@
+#!/usr/bin/env node
+/**
+ * Build a self-contained .mcpb bundle for pdf-server.
+ *
+ * `mcpb pack` zips whatever is on disk; in this monorepo all runtime deps
+ * are hoisted to the root node_modules, so packing in-place produces a
+ * bundle with no pdfjs-dist/ajv/etc. that crashes in Claude Desktop.
+ *
+ * This script stages dist/ + manifest into a clean temp dir, runs a fresh
+ * non-workspace `npm install --omit=dev --omit=optional` (the polyfill in
+ * dist/pdfjs-polyfill.js makes @napi-rs/canvas's ~130MB of native binaries
+ * unnecessary), syncs the manifest version to package.json, then packs.
+ */
+
+import {
+  cpSync,
+  rmSync,
+  mkdirSync,
+  readFileSync,
+  writeFileSync,
+} from "node:fs";
+import { execSync } from "node:child_process";
+import { fileURLToPath } from "node:url";
+import path from "node:path";
+
+const here = path.dirname(fileURLToPath(import.meta.url));
+const stage = path.join(here, ".mcpb-stage");
+const out = path.join(here, "pdf-server.mcpb");
+
+const pkg = JSON.parse(readFileSync(path.join(here, "package.json"), "utf8"));
+const manifest = JSON.parse(
+  readFileSync(path.join(here, "manifest.json"), "utf8"),
+);
+manifest.version = pkg.version;
+
+rmSync(stage, { recursive: true, force: true });
+mkdirSync(stage);
+
+for (const f of ["dist", "icon.png", "README.md", ".mcpbignore"]) {
+  cpSync(path.join(here, f), path.join(stage, f), { recursive: true });
+}
+writeFileSync(
+  path.join(stage, "manifest.json"),
+  JSON.stringify(manifest, null, 2),
+);
+writeFileSync(path.join(stage, "package.json"), JSON.stringify(pkg, null, 2));
+
+const run = (cmd) => execSync(cmd, { cwd: stage, stdio: "inherit" });
+run(
+  "npm install --omit=dev --omit=optional --no-audit --no-fund --no-package-lock " +
+    "--registry=https://registry.npmjs.org/",
+);
+run(`npx -y @anthropic-ai/mcpb pack . ${JSON.stringify(out)}`);
+
+rmSync(stage, { recursive: true, force: true });
+console.log(`\n✅ ${path.relative(process.cwd(), out)}`);

examples/pdf-server/manifest.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": "0.3",
   "name": "@modelcontextprotocol/server-pdf",
-  "display_name": "PDF (By Anthropic)",
+  "display_name": "pdf-viewer",
   "version": "1.0.1",
   "description": "Read and interact with PDF files using an interactive viewer with search, navigation, and text extraction",
   "author": {

examples/pdf-server/package.json

@@ -21,7 +21,8 @@
     "start": "cross-env NODE_ENV=development npm run build && npm run serve",
     "start:stdio": "cross-env NODE_ENV=development npm run build 1>&2 && npm run serve:stdio",
     "dev": "cross-env NODE_ENV=development concurrently \"npm run watch\" \"npm run serve\"",
-    "prepublishOnly": "npm run build"
+    "prepublishOnly": "npm run build",
+    "build:mcpb": "npm run build && node build-mcpb.mjs"
   },
   "dependencies": {
     "@modelcontextprotocol/ext-apps": "^1.0.0",