Exception path. Use integrate-fusion-agent for Atlas/chat/agent. Only when the user explicitly requires in-app useAtlasChat and connectToHostApp cannot provide the EOS sidebar (standalone app, always rejects). Triggers: useAtlasChat, in-app atlas chat, embedded chat, vendored atlas-agent. Not for generic "add a chat".
Install
The individual skill folder is not confirmed. This command opens the repository’s skill selector; follow the upstream instructions.
skills CLI
npx skills add cognitedata/builder-skills