The fetch's single `package` and its tagged form go; `group-packages` lists each TypeScript package a member's merge changes, at the member's head with its directory there. The checker asks every member's other fetches first, so every merge's changed paths are known before any TypeScript fetch, and gives each the whole list; the registry's version stays only for a package no member changes. Builds: design 47 G A-284, A-285 Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h