Restate demo: journal-based durable execution lets agents pause a month and rewind mid-run
AI Engineer · youtube · 2026-09-14
Giselle van Dongen (Restate) breaks down the durable execution layer under agent stacks: retry, recovery, session isolation, and cancelling in-flight work.
- Restate proxies requests in front of your agent service and journals every event; on failure it replays to the exact failure point instead of restarting
- A deep research agent can suspend for human approval for a month with zero serverless execution time, surviving restarts and redeploys
- Sessions are virtual objects with keyed, isolated state, so you can signal a live run: the demo injects 'focus on frontier models' mid-flight and a classifier routes it into the running loop; a full redirect cancels by rewinding down the call chain, killing sub agents before the controller
- Design borrows from Apache Flink and Meta's event infrastructure; pushes invocations instead of polling for low latency
Demo: a Slack deep research agent with a planner, parallel sub agents, and an injected tool failure that retries and completes instead of sinking the run.
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