[FEATURE]:Reload MCP servers without starting a new session #51597

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Description: When a new MCP server is added to opencode.json while a session is already open, the running session never picks it up. The only way to get the new tools is to close the conversation and start a new session. Restarting the app alone is not enough if the old session is resumed.

Steps to reproduce:

Open a session in OpenCode Desktop.
Add a new MCP server to opencode.json (e.g. chrome-devtools-mcp).
Verify with opencode mcp list that the server shows connected.
Go back to the open session: the new MCP tools are not available there.
Only a brand-new session gets the tools.
Expected: A way to reload/reconnect MCP servers mid-session (like Claude Code's /mcp reconnect), without losing the current conversation.

Actual: Tools are frozen at session start; config changes require a new session.

Reference: Claude Code and Codex CLI both support reconnecting MCP servers at runtime. OpenCode currently does not.

Env:

OpenCode Desktop for Windows
MCP added: chrome-devtools-mcp@1.10.1 as local server