Server exposes registry.db to Claude clients via stdio (default) or
HTTP+SSE. Read-only tools (fn_search, fn_show, fn_code, fn_list_domains,
fn_uses, fn_doctor) plus opt-in fn_run + fn_create_function for
iterative function authoring. Lives in dataforge/registry_mcp sub-repo.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>