Sandbox demo

Fan-out / Fan-in

Split work across N agents, gather results, merge.

Fan-out shines when the task is genuinely parallel: search across many files, port the same change to many packages, audit each route in an API. Antigravity spawns N workers, each does its piece, results converge to a merger. Speedup is roughly N× the sequential cost when the work is truly independent.

Sandbox transcript
Antigravity · sandbox replay
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The transcript is canned — no real API calls. The point is to internalize the loop: user → plan → tool → result → answer.

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Q1. What's the cost of fan-out you have to engineer for?
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