Your identity is a key pair that signs as you: an Ed25519 and an ML-DSA-65 key, kept in `~/.config/spectra`.
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Every agent you add gets a key of its own, and your identity *delegates* to it, for as long as you say. That is how Spectra knows, and shows, that `claude-book` is **your** agent.
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Keep the `keys` folder private: anyone with it can act as you.