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[Doc] Fix incorrect example for configuring protocol version #90

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Aug 3, 2025
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[Doc] Fix incorrect example for configuring protocol version #90

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7 changes: 4 additions & 3 deletions README.md
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Expand Up @@ -326,16 +326,17 @@ config.instrumentation_callback = ->(data) {

### Server Protocol Version

The server's protocol version can be overridden using the `protocol_version` class method:
The server's protocol version can be overridden using the `protocol_version` keyword argument:

```ruby
MCP::Server.protocol_version = "2024-11-05"
configuration = MCP::Configuration.new(protocol_version: "2024-11-05")
MCP::Server.new(name: "test_server", configuration: configuration)
```

This will make all new server instances use the specified protocol version instead of the default version. The protocol version can be reset to the default by setting it to `nil`:

```ruby
MCP::Server.protocol_version = nil
MCP::Configuration.new(protocol_version: nil)
```

If an invalid `protocol_version` value is set, an `ArgumentError` is raised.
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