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The post introduces Pi Durable, an open-source agent harness framework from earendil-works built for AI-native product development, featuring automatic crash recovery via checkpoints, TypeScript-only portability to Bun/Cloudflare edge environments, concurrent session branching, and a clean control-plane/execution-plane separation optimized for secondary development.
The yoyo framework achieves persistent directed graph state management by integrating the GASP (Git Agent State Protocol), enabling agent states to be branchable, versionable, auditable, and replayable, marking a shift from wild growth to traceable persistence.