Eric Traut f8a3db0b99 Clarify MCP OAuth reauthentication errors (#38418) ...

## Why

When an MCP server rejects existing OAuth credentials, reporting that the server
is merely not logged in obscures that the user needs to authenticate again.

## What changed

Pass the MCP startup failure reason into error formatting and report that the
server requires OAuth reauthentication when appropriate. Preserve the existing
recovery hint for either `codex mcp login` or the client's OAuth sign-in flow.

## Testing

Cover the reauthentication message for both login flows and verify it in the
streamable HTTP OAuth round-trip test.

GitOrigin-RevId: 6f6d5fe7519b1a476f8b70d976223b2ea1ec938e

2026-08-13 18:45:13 +00:00

..

required.rs

Start required cached MCP servers lazily for subagents (#38217)

2026-08-12 16:50:23 +00:00

resources.rs

Add MCP event discovery and subscriptions (#37494)

2026-08-07 19:36:52 +00:00

startup.rs

Clarify MCP OAuth reauthentication errors (#38418)

2026-08-13 18:45:13 +00:00

tool_catalog.rs

Start required cached MCP servers lazily for subagents (#38217)

2026-08-12 16:50:23 +00:00