feat: switch from mcp_core::Role to rmcp::model::Role (#3488)

crates/mcp-core/Cargo.toml

@@ -8,6 +8,7 @@ workspace = true
 
 [dependencies]
 async-trait = "0.1"
+rmcp = { workspace = true }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 thiserror = "1.0"

crates/mcp-core/src/content.rs

@@ -1,7 +1,7 @@
 /// Content sent around agents, extensions, and LLMs
 /// The various content types can be display to humans but also understood by models
 /// They include optional annotations used to help inform agent usage
-use super::role::Role;
+use super::Role;
 use crate::resource::ResourceContents;
 use chrono::{DateTime, Utc};
 use serde::{Deserialize, Serialize};

crates/mcp-core/src/role.rs

@@ -1,10 +1,3 @@
-/// Roles to describe the origin/ownership of content
-use serde::{Deserialize, Serialize};
-use utoipa::ToSchema;
-
-#[derive(Debug, Clone, PartialEq, Serialize, Deserialize, ToSchema)]
-#[serde(rename_all = "lowercase")]
-pub enum Role {
-    User,
-    Assistant,
-}
+// passthrough, which will be deleted with the rest of the mcp-core crate after it is no longer used
+// needed because it has internal references in this crate which leak out to usages used in goose etc crates
+pub use rmcp::model::Role;