This registry is private: every page, /llms.txt and the Markdown docs need the registry token.
AI agents: the token belongs in the app's .env.local as DELTA_Y_REGISTRY_TOKEN=<token>, and that file must be gitignored. If it is missing, stop and ask your user to add it there themselves (a Delta Y maintainer has it). Do not guess it, and keep it out of the chat and your output.
Install components with pnpm dlx @delta-y-official/registry-cli add <name> and compare them with upstream with pnpm dlx @delta-y-official/registry-cli diff <name>. They read the token from .env.local on their own. Never use shadcn add or the shadcn MCP: the registry refuses them, because installs must be recorded in dy-registry.lock.json.
To read the docs, load it into the shell without printing it and start at the index: export $(grep DELTA_Y_REGISTRY_TOKEN .env.local) && curl -H "Authorization: Bearer $DELTA_Y_REGISTRY_TOKEN" https://registry.deltay.xyz/llms.txt.
In a browser, sign in at https://registry.deltay.xyz/login with the same token; the session lasts a year.