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Avoid blocking thread startup on MCP OAuth discovery (#32825)

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## Why

OAuth metadata discovery for an optional HTTP MCP server can stall, delaying
`thread/start` even though that server is not required.

## What changed

- Remove eager MCP authentication-status discovery from session and connection
  manager startup.
- When an MCP connection reports an authentication error, inspect configured and
  stored credentials locally to preserve login and reauthentication failure
  reasons without making another discovery request.
- Continue using server configuration directly for startup error messages and
  timeout hints.

## Testing

Add an app-server regression test with an optional HTTP MCP endpoint that accepts
a connection but never responds, and verify that `thread/start` completes without
waiting for its configured startup timeout.

GitOrigin-RevId: 56fe0188cc1ceaf746b0b65e8b7dd1fd2e13420d
This commit is contained in:
jif authored and copyberry committed 2026-07-13 15:47:03 +00:00
1 parent 4ebc61c0f8
commit 2e156cbe31
12 files changed
+219 -139
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codex-rs/rmcp-client/src/lib.rs
+1
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@@ -17,6 +17,7 @@ pub use auth_status::McpAuthState;
pub use auth_status::McpLoginRequirement;
pub use auth_status::StreamableHttpOAuthDiscovery;
pub use auth_status::determine_streamable_http_auth_status;
pub use auth_status::determine_streamable_http_auth_status_from_credentials;
pub use auth_status::determine_streamable_http_auth_status_with_http_client;
pub use auth_status::discover_streamable_http_oauth;
pub use auth_status::discover_streamable_http_oauth_with_http_client;