Signed-off-by: Christian Tzolov <[email protected]>

- Add copyright headers to files missing them
- Add blank lines after copyright headers for consistency
- Remove unused imports in test files
- Remove unnecessary keep-alive warning logs in WebFlux and WebMvc transport providers

Signed-off-by: Christian Tzolov <[email protected]>

…col versions

- Add ProtocolVersions interface with version constants
- Change protocolVersion() to protocolVersions() returning List<String>
- Streamable HTTP clients now support both 2024-11-05 and 2025-03-26
- Fixes compatibility with MCP servers that return 2024-11-05 instead of 2025-03-26

Resolves #436
Related to #438

Signed-off-by: Christian Tzolov <[email protected]>

Signed-off-by: Yanming Zhou <[email protected]>

- Remove length check in hookOnComplete() to always emit AggregateResponseEvent
- Ensures proper completion handling regardless of response content length
- Add test for empty application/json responses with 200 OK status

see https://html.spec.whatwg.org/multipage/server-sent-events.html#the-last-event-id-header

Signed-off-by: Yanming Zhou <[email protected]>

- Change logger.error() to logger.warn() for unhandled notification methods
- Log full notification object instead of just method name for better context
- Affects McpClientSession, McpServerSession, and McpStreamableServerSession

Signed-off-by: Christian Tzolov <[email protected]>

- Closes #458

Signed-off-by: Daniel Garnier-Moiroux <[email protected]>

- Add support for ignoring SSE comment lines that start with ':'
- Add debug logging for comment line processing

Resolves #443

Signed-off-by: Christian Tzolov <[email protected]>

Handlers should be able to throw RPC errors and `McpError` is the
right exception for that.

Improve `DefaultMcpStatelessServerHandler` error handler to check if the
exception is `McpError` and, if so, use it to build the RPC error
result instead of re-writing as `INTERNAL_ERROR`.

…ties

- Add builder pattern to McpError for structured error creation with validation
- Deprecate McpError(Object) constructor in favor of builder approach
- Add mutate() method to server capabilities for creating modified copies

Signed-off-by: Christian Tzolov <[email protected]>