When the user has N independent improvements against a single upstream repo and each unit must land as its own upstream PR ("각각 PR로 올려", "open a PR for each", "fan out and send N PRs", "split these findings into separate PRs", "one PR per unit against upstream"), fan out N general-purpose subagents
When the user has N independent improvements against a single upstream repo and each unit must land as its own upstream PR ("각각 PR로 올려", "open a PR for each", "fan out and send N PRs", "split these findings into separate PRs", "one PR per unit against upstream"), fan out N general-purpose subagents — each in its own git worktree with non-overlapping file scope — where every agent commits, pushes,