MCP servers silently drop connection — no auto-reconnect or notification

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This issue might be a duplicate of existing issues. Please check:

MCP streamable-HTTP transport: 'Session not found' from server permanently breaks tool calls (no auto-reconnect) #25137: MCP streamable-HTTP transport no auto-reconnect — same core issue (session drop with no reconnect), different transport path
Bug: MCP tools permanently lost mid-session after single transient listTools() failure — no retry, no reconnect #17099: MCP tools permanently lost mid-session after single transient listTools() failure — no retry, no reconnect — covers the same root cause with a code-level breakdown
fix(mcp): MCP server loses connection mid-session causing intermittent failures #23997: MCP server loses connection mid-session causing intermittent failures
MCP server connection lost after context compaction — tools unavailable until new session #23556: MCP server connection lost after context compaction — tools unavailable until new session
MCP OAuth: opencode mcp auth doesn't refresh token in active sessions #21702: MCP OAuth: opencode mcp auth doesn't refresh token in active sessions — directly covers the OAuth token refresh aspect you mention
Remote MCP OAuth: browser never opens for re-authentication after session loss #16893: Remote MCP OAuth browser never opens for re-authentication after session loss

If your issue is distinct from all of the above, please add a comment clarifying how it differs so maintainers can triage it separately.

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