Around the world, around the clock
Behind the scenes, our global dev network is pushing Leios forward 24/7, with core and specification repositories evolving nonstop.
24 updates last week
5,559 contributions over the last 12 months
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Leios testnet
Ouroboros Leios is a major step up in Cardano’s throughput, and the Musashi Dojo testnet is where it gets proven. Named after Miyamoto Musashi (æ¦è”µ), it honours Cardano’s Japanese community and Musashi’s philosophy.
Run a node, test your tooling, and help shape the upgrade on its way to mainnet.
Roadmap
Leios advances through clearly defined phases from proposal and technical specification to testnet and hard fork, translating research into production-ready implementation.
Ticket status
Objectives
Our latest updates

Preparing the Constitution for Dijkstra: upcoming parameter updates
July 2026 - Input | Output blog
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MusashiNet launch.
June 2026 - Input | Output Video
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Leios monthly spotlight: October highlights
November 2025 - Input | Output blog
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Leios takes the stage at Crypto 2025
June 27, 2025 - Input | Output blog
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Ouroboros Leios: the next leap in scalability
April 24, 2025 - Input | Output blog
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Ouroboros Leios: design goals and concepts
November 17, 2022 - Input | Output research
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