mcp-permanent-list-must-have-exactly-one-canonical-home

The Permanent MCP server list was quadruple-restated across MEMORY.md, feedback_mcp_two_tier_model.md, architecture.md, and session-learnings.md — causing version drift (count said 10 in some files, 11 in others after adding Serena). Single source of truth must be MEMORY.md § System Pointers; all other files must reference it, never restate it. Any addition to the permanent list requires a cascade grep across all 4 locations minimum, with a MEMORY.md update as the authoritative source.