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Europe 2026

Two Roads to Durable Agents: Replay vs. Snapshot — Eric Allam, CEO, Trigger.dev

Eric Allam

Overview

This talk explores the fundamental shift required for AI agents in backend infrastructure, moving from stateless to stateful compute. It proposes two primary methods for achieving durable agents: replay and snapshotting. Replay, an evolution of traditional workflow engines, logs every interaction but can become unwieldy with complex agents. Snapshotting, a newer approach, preserves the entire execution state of a machine, offering a more robust solution for long-running, complex agent sessions.

Who should watch

Key takeaways

Notable quotes

*Agents are sort of forcing this move to become stateful compute.*
*The context is first and the most important, and it's just an append-only log of sort of everything that happened.*
*Instead of recreating the execution state from a log, we should use snapshot and restore.*

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Unofficial community note. Prefer the recording for nuance.