Every bundle is now a child speaking MCP over stdio, so stdout is the channel: the module logs on
stderr. The managed CLAUDE.md teaches mesh_search, mesh_describe, mesh_call, mesh_overview and
mesh_machine with addresses (<seat>.<verb>, <node>/<module>.<tool>) instead of flat tool names.
A hand-over is applied whatever the trailing render says; a failed render is reported beside it.
Proven over stdio as the runtime drives it: five tools listed, a key made on first use, a sealed
switch writing an access-token-only 0600 credentials file that keeps unknown keys.