Two changes so the USB connects to mother on first boot with no manual steps:
1. stage-colibri-iso.sh: external-mcp.json is now pre-configured with the
mother server entry (colibri@100.72.229.63, no remote command — the
hardened wrapper starts colibri-mcp in stdio MCP mode). Previously
staged as empty {}; the operator had to create it manually or run
clawdie-enable-mother.
2. provider.env now includes COLIBRI_MCP_EXTERNAL_CALL=1 by default
(already set on osa; missing from the ISO defaults).
3. SETUP-USB-TO-MOTHER.md: removed Step 3 (manual external-mcp.json),
fixed the diagram to match the hardened wrapper (no remote command),
corrected the server name from "m0th3r"/"c0l1br1" to the real names.
The SSH key, config, and known_hosts still come from the CLAWDIESEED
seed partition — the image carries no secrets. Without the seed the
connection fails gracefully.