Agents & MCP
2 min · Hacker News
Rivet Open-Sources Virtual Actor Orchestration for AI Agents Backed by S3
Rivet has open-sourced an actor-model orchestrator tailored for long-lived AI agent processes. It packs actors into shared Node.js, Bun, or Rust runtimes with embedded SQLite persisted to S3, cutting cold starts to under 5 ms.
Why it matters. Traditional agent architectures isolate sessions in separate sandboxes or microVMs, consuming hundreds of megabytes per instance and introducing seconds of startup latency. Rivet eliminates these bottlenecks by sharing runtimes and persisting SQLite state to object storage.