Pepitokitty/technocore-did-starter ? reverse-engineered prompt

Build me a simple Python command line tool that helps someone create and use a private Technocore identity.

I want it to generate a new encrypted Ed25519 identity locally with a passphrase, print the public did:key value, and save it so I can get the same DID back later without creating a new one. It should also let me send a signed Technocore message to a room, using the exact payload format the service expects, and show the response details like sequence, timestamp, DID, and nonce.

Make the flow easy for Windows, macOS, and Linux, and include clear help text for the commands, like creating the identity, showing the DID again, and posting a message. Use the README as the guide for the intended behavior, and if you need current Technocore details or crypto library docs, look them up online. Please keep it friendly for a first time user, and make sure the private key stays encrypted and never gets printed.