Base MCP [!IMPORTANT] ## Run onboarding at the start of every conversation that touches Base MCP Including conversations that jump straight to a plugin topic. Onboarding is short — see below. Detection The Base MCP exposes its tools to the harness when connected. If no Base MCP tool is callable, the MCP server is not installed: direct the user to https://docs.base.org/ai-agents/quickstart (or load references/install.md for app-specific steps) and stop. If Base MCP tools are available, load references/tone.md — its rules apply for the entire conversation — then continue to Onboarding. If — and…