X_DEAD_DOCS_HOST

a shipped source file builds a URL on ultimate.dev

that host answers HTTP 404 on every path, and it shipped as the docs: line of roughly ninety error declarations plus a docsFor(code) helper in four packages — so the link an operator was handed at the moment of a failure went nowhere. A ratchet: the sweep was done once and nothing stopped it regrowing, because scripts/new-package.ts wrote the dead URL into every future package's errors.ts template. Only a string literal is reported; a comment naming the host as the thing that was removed cannot 404 (packages/core/src/error-codes.ts:26 is the precedent)

delete the docs: line the finding names — UltimateError resolves the registered descriptor, whose default is ERROR_DOCS_URL from @ultimat3/core; if it is not an error link, import ERROR_DOCS_URL rather than writing a second host