Sandbox demo
Connecting to a REST API
Fetch + caching + revalidation patterns that don't blow up your battery.
Native fetch works great. The wrinkle on mobile is caching: hit the network on every screen and you'll burn battery and data. Pair fetch with a small cache layer (or use react-query) and revalidate strategically — when the screen mounts, when the user pulls to refresh, when network reconnects.
Sandbox transcript
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The transcript is canned — no real API calls. The point is to internalize the loop: user → plan → tool → result → answer.
Check your understanding
Q1. Why is unconditional fetch-on-mount a battery problem on mobile?
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