Corpusly indexes a Google Drive for semantic search and serves it to Claude and other MCP clients, with no vendor server in the path your documents take. How the local embedding pipeline and the two-transport MCP server work, and what it took to make ’nothing leaves the machine’ true: a memory blowout fixed by sub-batching, a stdout-corruption problem solved in one place, an OAuth scope decision that doubled as a compliance strategy, and a CI test that holds every outbound connection to an allowlist.
