Claude Code MCP migration slice for ~/.claude.json

Identify the exact slice of ~/.claude.json that carries MCP configuration for cross-machine migration, profile snapshots, or team sync. Use when: (1) building a tool that copies MCP servers between machines, (2) deciding which keys in ~/.claude.json to back up vs leave behind, (3) trying to reproduce someone else's MCP setup without copying their entire personal Claude Code state, (4) writing a redact/export step over ~/.claude.json and unsure which keys are "config" vs "session bookkeeping". Naive approaches go wrong in two ways: copying the whole file leaks 89-project history, userID, and 30+ unrelated keys; copying only top-level `mcpServers` silently drops per-project…