Curio is a fully open-source, credibly neutral core infrastructure implementation that enables Filecoin storage providers to produce blocks, participate in consensus, and deliver provable storage services across Proof-of-Replication and Proof-of-Data-Possession workflows in a single runtime. The project focuses on network-upgrade compatibility, security hardening, and a lightweight PDP-first build that reduces operational overhead while improving reliability for paid on-chain deals. By providing the forward-looking path for storage provider operations and migration from legacy tooling, Curio strengthens network resilience, service quality, and scalable adoption of verifiable on-chain storage.