lx-brain bridge — the strategy Brain (collection lx-brain) + Lx.Hypo (collection lx-hypo; own door at hypo.biostaq.com) + Lx.Brandon (collection lx-brandon; own door at brandon.biostaq.com). Authenticated endpoints: POST /mcp (MCP streamable HTTP), GET /search /vsearch /query /get /multi-get /status, POST /ingest + GET /ingests (propose content for review), GET /repos /repo/tree /repo/read /repo/grep /repo/log + POST /requirement (company code, read-only).