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docs/PROTOCOL.md (520 lines): - Identity model (seed → Ed25519 + X25519 via HKDF) - X3DH key exchange (4 DH operations, ASCII flow diagram) - Double Ratchet (chain/DH ratchet, skipped keys, state machine) - KDF chains with domain separation strings - AEAD (ChaCha20-Poly1305) - Wire format (WireMessage enum, bincode serialization) - Pre-key bundle format and lifecycle docs/SERVER.md (429 lines): - Build and run instructions - Full API reference with request/response examples - Database structure (sled trees) - Deployment (nginx reverse proxy, systemd unit) - Security considerations - Backup and recovery docs/CLIENT.md (507 lines): - Quick start guide - All CLI commands with examples - Identity management and mnemonic backup - Web client usage and limitations - Session and pre-key management - Threat model table - Troubleshooting guide Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>