Dojo is now open for testing
What is Musashi Dojo?
The Musashi Dojo is a public Cardano testnet for Ouroboros Leios. Running from late June 2026 through the mainnet hard fork, it hosts successive node releases, from early prototypes to release candidates.
Input Output (IO) operates the network, while independent SPOs run Leios-enabled block producers and participate in consensus. The testnet evolves with each release, providing an environment for testing, validation, and performance analysis.
For stake pool operators
1Build and run a node:
get a Leios node running and synced to the Dojo testnet
2Configure a block producer:
set up keys, register your pool, and start producing blocks on the testnet
3Get test funds and delegation:
use the faucet to request test ada and pool delegation so your block producer has stake to work with
4Run through the phases:
follow each phase's guidance, watch the behavior, and provide feedback
For builders
Leios changes how much Cardano can carry, not
the contracts already running on it. Testing DApps, indexers, wallets, and other tooling on the Leios testnet helps identify any issues and prepare for the transition to mainnet.
Why build now
- Get ahead of the curve: adapt for Leios on your own schedule, not on launch day
- Shape the protocol: builder feedback during the testnet feeds the parameter adjustment and the implementation directly
- A safe place to break things: it's a testnet – test ada is free from the faucet, and nothing reflects on mainnet
Documentation
Step-by-step operator documentation is published on the docs site and updated through each phase of the testnet.
While builder documentation is in development, refer to CIP-164 for the protocol design and the Ouroboros Leios repository for implementation details.