idempotency

Designing Antigravity Agents That Survive Multi-Hour Batches — A 4-Layer Durability Pattern From the Trenches

Long-running Antigravity batch agents will fail somewhere. After running them against the operations of an indie app business, I distilled four durability layers — checkpoint granularity, persistence choice, idempotent restore, and context summarization — into a single, opinionated design memo with working code and real cost numbers.