Update rmcp to 1.8.0 (#29634)

## Summary

- Update `rmcp` and `rmcp-macros` from 1.7.0 to 1.8.0.
- Adapt to the new shared `peer_info` return type.
- Box OAuth status discovery at the MCP boundary to keep the expanded
future type from overflowing Rust's trait recursion limit.

This brings in custom OAuth HTTP client support from
[modelcontextprotocol/rust-sdk#908](https://github.com/modelcontextprotocol/rust-sdk/pull/908).

codex-rs/Cargo.lock

@@ -9449,7 +9449,7 @@ version = "5.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "51e219e79014df21a225b1860a479e2dcd7cbd9130f4defd4bd0e191ea31d67d"
 dependencies = [
- "base64 0.21.7",
+ "base64 0.22.1",
  "chrono",
  "getrandom 0.2.17",
  "http 1.4.0",
@@ -10535,7 +10535,7 @@ version = "0.14.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "343d3bd7056eda839b03204e68deff7d1b13aba7af2b2fd16890697274262ee7"
 dependencies = [
- "heck 0.4.1",
+ "heck 0.5.0",
  "itertools 0.14.0",
  "log",
  "multimap",
@@ -11455,9 +11455,9 @@ dependencies = [
 
 [[package]]
 name = "rmcp"
-version = "1.7.0"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0810a9f717d9828f475fe1f629f4c305c8464b7f496c3a854b58d29e65f4058e"
+checksum = "1d1f571c72940a19d9532fe52dbea8bc9912bf1d766c2970bb824056b86f3f59"
 dependencies = [
  "async-trait",
  "base64 0.22.1",
@@ -11490,9 +11490,9 @@ dependencies = [
 
 [[package]]
 name = "rmcp-macros"
-version = "1.7.0"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6aefac48c364756e97f04c0401ba3231e8607882c7c1d92da0437dc16307904d"
+checksum = "1aad0035b69380782d78ea95b508327e6deaa2235909053e596eea8f27b5e1d5"
 dependencies = [
  "darling 0.23.0",
  "proc-macro2",

codex-rs/Cargo.toml

@@ -368,7 +368,7 @@ rcgen = { version = "0.14.7", default-features = false, features = [
 regex = "1.12.3"
 regex-lite = "0.1.8"
 reqwest = { version = "0.12", features = ["cookies"] }
-rmcp = { version = "1.7.0", default-features = false }
+rmcp = { version = "1.8.0", default-features = false }
 runfiles = { git = "https://github.com/dzbarsky/rules_rust", rev = "b56cbaa8465e74127f1ea216f813cd377295ad81" }
 rustls = { version = "0.23", default-features = false, features = [
     "aws_lc_rs",

codex-rs/codex-mcp/src/mcp/auth.rs

@@ -10,6 +10,7 @@ use codex_protocol::protocol::McpAuthStatus;
 use codex_rmcp_client::OAuthProviderError;
 use codex_rmcp_client::determine_streamable_http_auth_status;
 use codex_rmcp_client::discover_streamable_http_oauth;
+use futures::FutureExt;
 use futures::future::join_all;
 use tracing::warn;
 
@@ -217,6 +218,7 @@ async fn compute_auth_status(
                 store_mode,
                 keyring_backend_kind,
             )
+            .boxed()
             .await
         }
     }

codex-rs/rmcp-client/src/rmcp_client.rs

@@ -455,7 +455,7 @@ impl RmcpClient {
             .peer()
             .peer_info()
             .ok_or_else(|| anyhow!("handshake succeeded but server info was missing"))?;
-        let initialize_result = initialize_result_rmcp.clone();
+        let initialize_result = initialize_result_rmcp.as_ref().clone();
 
         {
             let mut initialize_context = self.initialize_context.lock().await;