Michael Bolin 4ef1a163f4 feat: add support for custom client notifications (#556) ... MCP servers, particularly ones that offer "experimental" capabilities, may wish to handle custom client notifications that are not part of the standard MCP specification. This change introduces a new `CustomClientNotification` type that allows a server to process such custom notifications. - introduces `CustomClientNotification` to carry arbitrary methods/params while still preserving meta/extensions; wires it into the `ClientNotification` union and `serde` so `params` can be decoded with `params_as` - allows server handlers to receive custom notifications via a new `on_custom_notification` hook - adds integration coverage that sends a custom client notification end-to-end and asserts the server sees the method and payload Test: ```shell cargo test -p rmcp --features client test_custom_client_notification_reaches_server ```		2025-12-01 15:58:18 -05:00
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rmcp	feat: add support for custom client notifications (#556)	2025-12-01 15:58:18 -05:00
rmcp-macros	chore: release v0.9.1 (#548)	2025-11-24 13:01:48 -05:00