Rivumi normalizes each subagent dispatch into dependency waves of at most four nodes, runs read-only children concurrently in isolated workspaces, then makes the parent repeat hooks, approval, and transaction execution for any modification.
The official docs split Claude Code's parallel work into 4 approaches: subagents delegate inside one session, agent view lets you supervise background sessions yourself, agent teams coordinate workers through a lead, and dynamic workflows run scripted fleets of subagents with cross-checks; file collisions are always handled by worktrees. Includes a translated comparison table and a three-question decision guide.
Skills load from six sources with the highest precedence winning on name collisions, and a per-agent list replaces rather than merges. Sub-agents get no session or message tools by default — they return plain text to the parent, and the right to speak to a human stays with the parent agent.