opencode mcp list hangs when plugins are enabled; --pure completes

Summary

opencode mcp list hangs indefinitely with plugins enabled. The same command with --pure finishes in a bounded time and lists servers, including a remote HTTP MCP that is connected.

Observed: hang longer than 80s; a 22s timeout was not enough to complete the plugin-enabled path.

Reproduction

1. Enable plugins (default / non-pure mode).
2. Run opencode mcp list.
3. Observe: the command never returns (waited >80s).
4. Run opencode --pure mcp list.
5. Observe: completes in under 20s. The intended remote HTTP MCP is connected. Other unrelated servers fail with SSE Non-200 403. Listing still completes.

No custom MCP URLs or credentials are required to discuss the hang: the --pure run already shows mixed success/failure without blocking.

Expected

mcp list should:

• Apply a per-server connect timeout (including HTTP and SSE transports).
• Continue listing remaining servers if one server is slow, unauthenticated, or returns 403.
• Never wait forever on a single plugin hook or MCP handshake.

--pure currently unblocks listing; the plugin-enabled path should be equally bounded.

Hypothesis

Plugin-enabled mcp list waits forever on a slow or auth-failing MCP (or a plugin hook that talks to one) instead of enforcing per-server timeouts. --pure skips that path, so mixed SSE 403s do not stall the command.

Ask

1. Per-server connect timeout on mcp list (plugin-enabled and --pure).
2. One failed or hung server must not block listing the rest.
3. If a plugin hook participates in MCP discovery, it should inherit the same timeout and isolation.

Environment (anonymized)

• OpenCode CLI (opencode mcp list / opencode --pure mcp list)
• Mix of remote HTTP MCP and SSE servers
• Plugins enabled vs --pure