Pi Durable Ships Crash-Resumable Agent Runtime

Pi Durable tackles the real agent reliability problem: durable state and side-effect recovery, not merely saving chat transcripts. Its minimalist design is compelling for builders who want control, though its experimental API and limited operational guarantees make it a substrate to evaluate—not a turnkey production platform.

• –Checkpointed model turns and tool calls let processes resume after restarts, while replay policies distinguish safe retries from potentially harmful side effects.
• –Typed JSON documents commit atomically alongside transcripts, making application state, agent history, and fork behavior consistent.
• –SQLite, JSONL, memory, and portable storage options support self-hosted deployments across environments.
• –It offers agent-native durability in a smaller, more malleable package than general workflow engines such as Temporal, but without their broader production ecosystem.
• –The API can change without notice, and storage currently has single-process ownership, so production adopters should plan for operational hardening.