GET  /manifest.json              GHL Agent Studio service discovery
GET  /api/teams                   list teams
GET  /api/agents                  list agents
GET  /api/nodes                   both, in one call
GET  /api/{plural}/{slug}         load config + composed prompt
GET  /api/{plural}/{slug}/files   list editable markdown files
GET  /api/{plural}/{slug}/files/{f}   read a file
PUT  /api/{plural}/{slug}/files/{f}   write a file (auto-creates folder)
GET  /api/spokes/registry         spoke catalog (slug, name, description, hipaa_posture, tools)