Merge pull request #234 from modelcontextprotocol/revert-233-docs/publishing-bundle-readme

Revert "docs: add "Publishing Your Bundle" section to README"

.gitignore

@@ -88,6 +88,8 @@ typings/
 # Claude files
 .claude.json
 .claude/
+CLAUDE.md
+PROJECT_STATUS.md
 
 # Vite
 .vite/
@@ -107,4 +109,8 @@ self-signed-key.pem
 invalid-json.json
 **/server/lib/**
 
+# Rust example build artifacts
+examples/calculator-rust/target/
+examples/calculator-rust/server/
+
 .yarn/install-state.gz

.vscode/settings.json

@@ -6,5 +6,6 @@
   "eslint.validate": ["typescript"],
   "[typescript]": {
     "editor.defaultFormatter": "dbaeumer.vscode-eslint"
-  }
+  },
+  "typescript.tsdk": "node_modules/typescript/lib"
 }

CLI.md

@@ -292,7 +292,8 @@ MCPB uses PKCS#7 (Cryptographic Message Syntax) for digital signatures:
 ```
 [Original MCPB ZIP content]
 MCPB_SIG_V1
-[Base64-encoded PKCS#7 signature]
+[4-byte little-endian length prefix]
+[DER-encoded PKCS#7 signature]
 MCPB_SIG_END
 ```
 

LICENSE

@@ -1,7 +1,216 @@
-Copyright 2025 Anthropic, PBC.
+The MCP project is undergoing a licensing transition from the MIT License to the Apache License, Version 2.0 ("Apache-2.0"). All new code and specification contributions to the project are licensed under Apache-2.0. Documentation contributions (excluding specifications) are licensed under CC-BY-4.0.
 
-Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+Contributions for which relicensing consent has been obtained are licensed under Apache-2.0. Contributions made by authors who originally licensed their work under the MIT License and who have not yet granted explicit permission to relicense remain licensed under the MIT License.
 
-The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+No rights beyond those granted by the applicable original license are conveyed for such contributions.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+---
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
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+      outstanding shares, or (iii) beneficial ownership of such entity.
+
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+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
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+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+---
+
+MIT License
+
+Copyright (c) 2024-2025 Model Context Protocol a Series of LF Projects, LLC.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+---
+
+Creative Commons Attribution 4.0 International (CC-BY-4.0)
+
+Documentation in this project (excluding specifications) is licensed under
+CC-BY-4.0. See https://creativecommons.org/licenses/by/4.0/legalcode for
+the full license text.

MANIFEST.md

@@ -1,7 +1,7 @@
 # MCPB Manifest.json Spec
 
 Current version: `0.3`
-Last updated: 2025-10-24
+Last updated: 2025-12-02
 
 ## Manifest Schema
 
@@ -84,7 +84,7 @@ A full `manifest.json` with most of the optional fields looks like this:
   },
   "repository": {
     "type": "git",
-    "url": "https://github.com/your-username/my-mcp-extension"
+    "url": "https://github.com/your-username/my-mcp-extension.git"
   },
   "homepage": "https://example.com/my-extension",
   "documentation": "https://docs.example.com/my-extension",
@@ -398,6 +398,53 @@ The `server` object defines how to run the MCP server:
 
 ### Server Types
 
+Four server types are supported:
+
+- **`node`**: Node.js server with bundled dependencies
+- **`python`**: Python server with bundled dependencies
+- **`binary`**: Compiled executable
+- **`uv`**: Python server using UV runtime (v0.4+)
+
+### UV Runtime (v0.4+)
+
+The `uv` server type enables cross-platform Python extensions without bundling dependencies. Instead, dependencies are declared in `pyproject.toml` and installed by the host application using UV.
+
+**Benefits:**
+- Cross-platform support (Windows, macOS, Linux; Intel, ARM)
+- Small bundle size (~100 KB vs 5-10 MB)
+- Handles compiled dependencies (pydantic, numpy, etc.)
+- No user Python installation required
+
+**Example:**
+```json
+{
+  "manifest_version": "0.4",
+  "server": {
+    "type": "uv",
+    "entry_point": "src/server.py"
+  }
+}
+```
+
+**Requirements:**
+- Must include `pyproject.toml` with dependencies
+- Must NOT include `server/lib/` or `server/venv/`
+- `mcp_config` is optional (host manages execution)
+
+**Package structure:**
+```
+extension.mcpb
+├── manifest.json       # server.type = "uv"
+├── pyproject.toml      # Dependencies
+├── .mcpbignore        # Exclude .venv, server/lib
+└── src/
+    └── server.py
+```
+
+See `examples/hello-world-uv` for a complete example.
+
+### Node, Python, and Binary Types
+
 1. **Python**: `server.type = "python"`
    - Requires `entry_point` to Python file
    - All dependencies must be bundled in the MCPB

README.md

@@ -109,12 +109,22 @@ bundle.mcpb (ZIP file)
 
 ### Bundling Dependencies
 
-**Python Bundles:**
+**UV Runtime (v0.4+):**
 
+- Use `server.type = "uv"` in manifest
+- Include `pyproject.toml` with dependencies (no bundled packages needed)
+- Host application manages Python and dependencies automatically
+- Works cross-platform without user Python installation
+- See `examples/hello-world-uv`
+
+**Python Bundles (Traditional):**
+
+- Use `server.type = "python"` in manifest
 - Bundle all required packages in `server/lib/` directory
 - OR bundle a complete virtual environment in `server/venv/`
 - Use tools like `pip-tools`, `poetry`, or `pipenv` to create reproducible bundles
 - Set `PYTHONPATH` to include bundled packages via `mcp_config.env`
+- **Limitation**: Cannot portably bundle compiled dependencies (e.g., pydantic, which the MCP Python SDK requires)
 
 **Node.js Bundles:**
 
@@ -159,4 +169,4 @@ yarn test
 
 # License
 
-This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
+This project is licensed under the Apache License 2.0 for new contributions, with existing code under MIT - see the [LICENSE](LICENSE) file for details.

examples/README.md

@@ -14,11 +14,12 @@ But, the MCP servers themselves are not robust secure production ready servers a
 
 ## Examples Included
 
-| Example               | Type    | Demonstrates                             |
-| --------------------- | ------- | ---------------------------------------- |
-| `hello-world-node`    | Node.js | Basic MCP server with simple time tool   |
-| `chrome-applescript`  | Node.js | Browser automation via AppleScript       |
-| `file-manager-python` | Python  | File system operations and path handling |
+| Example               | Type    | Demonstrates                                |
+| --------------------- | ------- | ------------------------------------------- |
+| `hello-world-node`    | Node.js | Basic MCP server with simple time tool      |
+| `chrome-applescript`  | Node.js | Browser automation via AppleScript          |
+| `file-manager-python` | Python  | File system operations and path handling    |
+| `calculator-rust`     | Binary  | Compiled Rust binary as MCP Bundle          |
 
 ## Usage
 

examples/calculator-rust/.mcpbignore

@@ -0,0 +1,5 @@
+Cargo.toml
+Cargo.lock
+src/
+target/
+README.md

examples/calculator-rust/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "mcp-calculator"
+version = "1.0.0"
+edition = "2024"
+
+[dependencies]
+rmcp = { version = "1.2.0", features = ["server", "macros", "transport-io", "schemars"] }
+tokio = { version = "1", features = ["macros", "rt-multi-thread", "io-std"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+anyhow = "1.0"
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter", "std", "fmt"] }
+schemars = "1.0"
+
+[profile.release]
+strip = true
+lto = true

examples/calculator-rust/README.md

@@ -0,0 +1,73 @@
+# Calculator Rust Binary Example
+
+Demonstrates packaging a compiled Rust binary as an MCP Bundle using the `binary` server type. Based on the [official Rust MCP SDK calculator example](https://github.com/modelcontextprotocol/rust-sdk/tree/main/examples/servers).
+
+## What is Binary Server Type?
+
+Unlike `node` or `uv` server types where the source code is bundled and executed by a runtime, the `binary` server type packages a pre-compiled native executable. This is useful for:
+
+- Rust, Go, C/C++ MCP servers
+- Performance-sensitive workloads
+- Servers with no runtime dependencies
+
+The tradeoff is that binaries are platform-specific — you need a separate build for each target OS/architecture.
+
+## Structure
+
+```
+calculator-rust/
+├── manifest.json       # server.type = "binary"
+├── Cargo.toml          # Rust project
+├── .mcpbignore         # Exclude source from bundle
+└── src/
+    └── main.rs         # Calculator MCP server (~80 LOC)
+```
+
+After building, the `server/` directory is created with the compiled binary.
+
+## Building
+
+Requires [Rust](https://rustup.rs/) 1.85+.
+
+```bash
+cd examples/calculator-rust
+cargo build --release
+mkdir -p server
+cp target/release/mcp-calculator server/
+```
+
+## Packing
+
+```bash
+mcpb pack examples/calculator-rust
+```
+
+The `.mcpbignore` file excludes source code and build artifacts — only `manifest.json` and `server/mcp-calculator` end up in the bundle.
+
+## Testing
+
+```bash
+# MCP protocol handshake
+echo '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"test","version":"1.0"}}}' \
+  | ./server/mcp-calculator
+
+# Tool call
+(printf '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"test","version":"1.0"}}}\n'
+printf '{"jsonrpc":"2.0","method":"notifications/initialized"}\n'
+printf '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"sum","arguments":{"a":3,"b":4}}}\n'
+sleep 1) | ./server/mcp-calculator
+```
+
+Expected: `sum(3, 4)` returns `{"text":"7"}`.
+
+## Tools
+
+- **sum** — Calculate the sum of two numbers
+- **sub** — Calculate the difference of two numbers
+
+## Notes
+
+- Binary size: ~2.5 MB (stripped, LTO enabled)
+- The `Cargo.toml` uses `edition = "2024"` (Rust 1.85+)
+- Logs are written to stderr via `tracing`, so they don't interfere with MCP's stdio transport
+- Uses the [rmcp](https://crates.io/crates/rmcp) crate (official Rust MCP SDK)

examples/calculator-rust/manifest.json

@@ -0,0 +1,36 @@
+{
+  "$schema": "../../dist/mcpb-manifest.schema.json",
+  "manifest_version": "0.3",
+  "name": "calculator-rust",
+  "display_name": "Calculator (Rust Binary)",
+  "version": "1.0.0",
+  "description": "A simple calculator MCP server compiled from Rust",
+  "long_description": "Demonstrates packaging a compiled Rust binary as an MCP Bundle using the binary server type. The server provides sum and sub tools for basic arithmetic. Based on the official Rust MCP SDK calculator example.",
+  "author": {
+    "name": "Model Context Protocol"
+  },
+  "server": {
+    "type": "binary",
+    "entry_point": "server/mcp-calculator",
+    "mcp_config": {
+      "command": "${__dirname}/server/mcp-calculator",
+      "args": [],
+      "env": {}
+    }
+  },
+  "tools": [
+    {
+      "name": "sum",
+      "description": "Calculate the sum of two numbers"
+    },
+    {
+      "name": "sub",
+      "description": "Calculate the difference of two numbers"
+    }
+  ],
+  "keywords": ["calculator", "rust", "binary", "example"],
+  "license": "Apache-2.0",
+  "compatibility": {
+    "platforms": ["darwin", "linux"]
+  }
+}

examples/calculator-rust/src/main.rs

@@ -0,0 +1,80 @@
+use anyhow::Result;
+use rmcp::{
+    ServerHandler, ServiceExt,
+    handler::server::{router::tool::ToolRouter, wrapper::Parameters},
+    model::{ServerCapabilities, ServerInfo},
+    schemars, tool, tool_handler, tool_router,
+    transport::stdio,
+};
+use tracing_subscriber::{self, EnvFilter};
+
+// --- Calculator types ---
+
+#[derive(Debug, serde::Deserialize, schemars::JsonSchema)]
+pub struct SumRequest {
+    #[schemars(description = "the left hand side number")]
+    pub a: i32,
+    pub b: i32,
+}
+
+#[derive(Debug, serde::Deserialize, schemars::JsonSchema)]
+pub struct SubRequest {
+    #[schemars(description = "the left hand side number")]
+    pub a: i32,
+    #[schemars(description = "the right hand side number")]
+    pub b: i32,
+}
+
+// --- Calculator server ---
+
+#[derive(Debug, Clone)]
+pub struct Calculator {
+    tool_router: ToolRouter<Self>,
+}
+
+#[tool_router]
+impl Calculator {
+    pub fn new() -> Self {
+        Self {
+            tool_router: Self::tool_router(),
+        }
+    }
+
+    #[tool(description = "Calculate the sum of two numbers")]
+    fn sum(&self, Parameters(SumRequest { a, b }): Parameters<SumRequest>) -> String {
+        (a + b).to_string()
+    }
+
+    #[tool(description = "Calculate the difference of two numbers")]
+    fn sub(&self, Parameters(SubRequest { a, b }): Parameters<SubRequest>) -> String {
+        (a - b).to_string()
+    }
+}
+
+#[tool_handler]
+impl ServerHandler for Calculator {
+    fn get_info(&self) -> ServerInfo {
+        ServerInfo::new(ServerCapabilities::builder().enable_tools().build())
+            .with_instructions("A simple calculator".to_string())
+    }
+}
+
+// --- Main ---
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    tracing_subscriber::fmt()
+        .with_env_filter(EnvFilter::from_default_env().add_directive(tracing::Level::DEBUG.into()))
+        .with_writer(std::io::stderr)
+        .with_ansi(false)
+        .init();
+
+    tracing::info!("Starting Calculator MCP server");
+
+    let service = Calculator::new().serve(stdio()).await.inspect_err(|e| {
+        tracing::error!("serving error: {:?}", e);
+    })?;
+
+    service.waiting().await?;
+    Ok(())
+}

examples/chrome-applescript/server/index.js

@@ -33,17 +33,6 @@ class ChromeControlServer {
     this.setupHandlers();
   }
 
-  // Helper methods
-  escapeForAppleScript(str) {
-    if (typeof str !== "string") return str;
-    // Basic AppleScript string escaping
-    return str
-      .replace(/\\/g, "\\\\") // Escape backslashes first
-      .replace(/"/g, '\\"') // Then escape double quotes
-      .replace(/\n/g, "\\n") // Escape newlines
-      .replace(/\r/g, "\\r"); // Escape carriage returns
-  }
-
   async checkChromeAvailable() {
     try {
       const script = 'tell application "Google Chrome" to return "available"';
@@ -82,12 +71,28 @@ class ChromeControlServer {
     }
   }
 
+  // Coerce tab_id to a safe numeric value before interpolating into
+  // AppleScript. inputSchema type:"number" is advisory — runtime may receive
+  // a string, which would otherwise be injected into the osascript template.
+  toSafeTabId(tabId) {
+    if (tabId === null || tabId === undefined) return null;
+    const n = Number.parseInt(tabId, 10);
+    if (Number.isNaN(n)) {
+      throw new Error("tab_id must be a number");
+    }
+    return n;
+  }
+
   async findTabById(tabId) {
+    const safeTabId = this.toSafeTabId(tabId);
+    if (safeTabId === null) {
+      return { w: null, t: null, found: false };
+    }
     const script = `
       tell application "Google Chrome"
         repeat with w in windows
           repeat with t in tabs of w
-            if (id of t as string) is "${tabId}" then
+            if (id of t as string) is "${safeTabId}" then
               return {w, t, true}
             end if
           end repeat
@@ -103,7 +108,8 @@ class ChromeControlServer {
     operation,
     successMessage = "Operation completed",
   ) {
-    if (!tabId) {
+    const safeTabId = this.toSafeTabId(tabId);
+    if (safeTabId === null) {
       // No tab ID, execute on active tab
       return this.executeAppleScript(operation.activeScript);
     }
@@ -112,7 +118,7 @@ class ChromeControlServer {
       tell application "Google Chrome"
         repeat with w in windows
           repeat with t in tabs of w
-            if (id of t as string) is "${tabId}" then
+            if (id of t as string) is "${safeTabId}" then
               ${operation.tabScript}
               return "${successMessage}"
             end if
@@ -272,10 +278,23 @@ class ChromeControlServer {
               throw new Error("URL is required and must be a string");
             }
 
-            const escapedUrl = this.escapeForAppleScript(url);
+            try {
+              new URL(url);
+            } catch (error) {
+              return {
+                content: [
+                  {
+                    type: "text",
+                    text: `Error: url is not a valid url - ${error.message}`,
+                  },
+                ],
+                isError: true,
+              };
+            }
+
             const script = new_tab
-              ? `tell application "Google Chrome" to open location "${escapedUrl}"`
-              : `tell application "Google Chrome" to set URL of active tab of front window to "${escapedUrl}"`;
+              ? `tell application "Google Chrome" to open location ${JSON.stringify(url)}`
+              : `tell application "Google Chrome" to set URL of active tab of front window to ${JSON.stringify(url)}`;
 
             await this.executeAppleScript(script);
             return {
@@ -551,6 +570,7 @@ class ChromeControlServer {
                 "JavaScript code is required and must be a string",
               );
             }
+            const safeTabId = this.toSafeTabId(tab_id);
 
             // Wrap the code to capture console.log outputs
             const wrappedCode = `
@@ -626,15 +646,14 @@ class ChromeControlServer {
               })();
             `;
 
-            const escapedCode = this.escapeForAppleScript(wrappedCode);
-
-            const script = tab_id
-              ? `
+            const script =
+              safeTabId != null
+                ? `
               tell application "Google Chrome"
                 repeat with w in windows
                   repeat with t in tabs of w
-                    if (id of t as string) is "${tab_id}" then
-                      set result to execute t javascript "${escapedCode}"
+                    if (id of t as string) is "${safeTabId}" then
+                      set result to execute t javascript ${JSON.stringify(wrappedCode)}
                       return result
                     end if
                   end repeat
@@ -642,9 +661,9 @@ class ChromeControlServer {
                 return "Tab not found"
               end tell
             `
-              : `
+                : `
               tell application "Google Chrome"
-                execute active tab of front window javascript "${escapedCode}"
+                execute active tab of front window javascript ${JSON.stringify(wrappedCode)}
               end tell
             `;
 
@@ -695,14 +714,16 @@ class ChromeControlServer {
 
           case "get_page_content": {
             const { tab_id } = args;
+            const safeTabId = this.toSafeTabId(tab_id);
 
             const jsCode = "document.body.innerText";
-            const script = tab_id
-              ? `
+            const script =
+              safeTabId != null
+                ? `
               tell application "Google Chrome"
                 repeat with w in windows
                   repeat with t in tabs of w
-                    if (id of t as string) is "${tab_id}" then
+                    if (id of t as string) is "${safeTabId}" then
                       set pageContent to execute t javascript "${jsCode}"
                       return pageContent
                     end if
@@ -711,7 +732,7 @@ class ChromeControlServer {
                 return "Tab not found"
               end tell
             `
-              : `
+                : `
               tell application "Google Chrome"
                 execute active tab of front window javascript "${jsCode}"
               end tell

examples/file-manager-python/.mcpbignore

@@ -0,0 +1,7 @@
+.venv/
+__pycache__/
+*.pyc
+.pytest_cache/
+.mypy_cache/
+*.egg-info/
+uv.lock

examples/file-manager-python/manifest.json

@@ -1,28 +1,28 @@
 {
-  "$schema": "../../dist/mcpb-manifest.schema.json",
-  "manifest_version": "0.1",
+  "manifest_version": "0.4",
   "name": "file-manager-python",
   "display_name": "Python File Manager MCP",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "description": "A Python MCP server for file operations",
-  "long_description": "This extension provides file management capabilities through a Python MCP server. It demonstrates Python-based MCP Bundle development, including file operations, directory management, and proper MCP protocol implementation.",
+  "long_description": "This extension provides file management capabilities through a Python MCP server. It demonstrates Python-based MCP Bundle development using UV runtime, including file operations, directory management, and proper MCP protocol implementation.",
   "author": {
     "name": "Anthropic",
     "email": "support@anthropic.com",
     "url": "https://github.com/anthropics"
   },
   "server": {
-    "type": "python",
+    "type": "uv",
     "entry_point": "server/main.py",
     "mcp_config": {
-      "command": "python",
+      "command": "uv",
       "args": [
-        "${__dirname}/server/main.py",
+        "run",
+        "--directory", "${__dirname}",
+        "server/main.py",
         "--workspace=${user_config.workspace_directory}"
       ],
       "env": {
-        "DEBUG": "${user_config.debug_mode}",
-        "PYTHONPATH": "${__dirname}/server/lib"
+        "DEBUG": "${user_config.debug_mode}"
       }
     }
   },
@@ -62,8 +62,7 @@
     "claude_desktop": ">=0.10.0",
     "platforms": ["darwin", "win32", "linux"],
     "runtimes": {
-      "python": ">=3.8.0 <4"
+      "python": ">=3.10.0 <4"
     }
-  },
-  "privacy_policies": []
+  }
 }

examples/file-manager-python/pyproject.toml

@@ -1,31 +1,8 @@
-[build-system]
-requires = ["setuptools>=42", "wheel"]
-build-backend = "setuptools.build_meta"
-
 [project]
 name = "file-manager-python"
-version = "0.1.0"
+version = "0.2.0"
 description = "A Python MCP server for file operations"
-authors = [
-    {name = "Anthropic", email = "support@anthropic.com"}
+requires-python = ">=3.10"
+dependencies = [
+    "mcp>=1.0.0",
 ]
-license = {text = "MIT"}
-classifiers = [
-    "Private :: Do Not Upload"  # Prevents accidental uploads to PyPI
-]
-
-[project.dependencies]
-mcp = ">=1.0.0"
-trio = ">=0.22.0"
-
-[tool.setuptools]
-packages = ["server"]
-
-[project.scripts]
-bundle-deps = "python:install_deps"
-
-# Custom scripts section for DXT development
-[tool.dxt]
-bundle = "pip install \"mcp[all]\" --target server/lib --upgrade --force-reinstall"
-test = "python server/main.py --debug"
-pack = "npx @anthropic-ai/dxt pack"

examples/file-manager-python/requirements.txt

@@ -1,2 +0,0 @@
-mcp>=1.0.0
-trio>=0.22.0

examples/file-system-node/package.json

@@ -1,10 +1,10 @@
 {
   "name": "ant.dir.ant.anthropic.filesystem",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "type": "module",
   "private": true,
   "main": "server/index.js",
   "dependencies": {
-    "@modelcontextprotocol/server-filesystem": "2025.1.14"
+    "@modelcontextprotocol/server-filesystem": "2025.11.25"
   }
 }

examples/hello-world-node/server/index.js

@@ -64,7 +64,13 @@ server.setRequestHandler(CallToolRequestSchema, async (request) => {
 });
 
 // Start the server
-const transport = new StdioServerTransport();
-server.connect(transport);
+async function main() {
+  const transport = new StdioServerTransport();
+  await server.connect(transport);
+  console.error("Hello World MCP server running...");
+}
 
-console.error("Hello World MCP server running...");
+main().catch((error) => {
+  console.error("Fatal error in main():", error);
+  process.exit(1);
+});

examples/hello-world-uv/.mcpbignore

@@ -0,0 +1,8 @@
+.venv/
+__pycache__/
+*.pyc
+.pytest_cache/
+.mypy_cache/
+*.egg-info/
+server/lib/
+server/venv/