The Agent tool takes a model, so the grind can go to a cheaper one while the
manager plans and reviews. Three differences decide which arrangement fits: a
spawned agent reports to the manager and is invisible to the user, it dies with its
task where a peer accumulates context, and only a spawned one can have its own git
worktree — which is what allows parallel work over the same files.
And the constraint that goes with it: spawn only when asked. A fleet of workers is
the owner's cost to authorise.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
pastilhasandClaude Opus 5
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