Cardano Devnet-in-a-Box (cardano-node + hydra + ogmios + kupo)

What this skill is for

You are setting up a local, end-to-end rehearsal environment so we can:

• build/sign/submit real transactions (cardano-cli)
• run dApp infra (Ogmios + Kupo)
• open/close a Hydra Head and push L2 txs

…all locally before anyone even thinks about mainnet.

This skill uses Hydra’s official demo devnet as the base (because it’s the most “known-good” path), then bolts on Ogmios + Kupo as extra services.

Hydra’s docs describe this demo setup: a single fast local devnet + 3 Hydra nodes (Alice/Bob/Carol) + hydra-tui.

Kupo’s Docker image docs show the minimal container flags we reuse (--node-socket, --node-config, --host, --workdir).

Hydra publishes official Docker images at ghcr.io/cardano-scaling/hydra-node.