| Browser extension shell | src/App.tsx, src/main.tsx, src/background/index.ts, src/content/index.ts, src/injected/index.ts | Extension UI, background runtime, page injection, provider bridge, approval routing. |
| Wallet state and backup | src/store/walletStore.ts, src/lib/walletPersistStorage.ts, src/lib/walletBackup.ts, src/background/sessionState.ts | Account persistence, encrypted backups, session unlock state, wallet password checks. |
| Threshold signing | src/services/frost/ | WASM-backed FROST DKG, signing rounds, local signing, multi-device orchestration, cosigner signing. |
| Ceremony relay client | src/services/relay/ | BroadcastChannel relay for same-browser testing and WebSocket relay for cross-device ceremonies. |
| Relay server | relay-server/src/server.ts, relay-server/src/cosigner.ts, relay-server/src/secureStorage.ts, relay-server/src/pqcSponsor.ts | WebSocket rooms, session invite auth, server cosigner share storage/signing, PQC sponsorship. |
| PQC wallet | src/services/quantum/, src/pages/QuantumVault.tsx, src/background/quantumVaultSession.ts | Winternitz key generation, encrypted local one-time key storage, PQC wallet creation, advance signing. |
| Privacy Vault | src/services/umbra/, src/components/wallet/PrivacyView.tsx, src/components/onboarding/PrivacyVaultSetup.tsx | Umbra client setup, master seed storage, private sends, deposits, withdrawals, scan, claim, Privacy Vault onboarding. |
| Internal TypeScript SDK | src/sdk/ | Browser-side instruction builders, account decoders, PDA helpers, errors, and client helpers. |
| Rust protocol constants | crates/vaulkyrie-protocol/src/lib.rs | Shared action descriptors, thresholds, WOTS constants, message domains, and digest builders. |
| Rust SDK | crates/vaulkyrie-sdk/src/ | Instruction builders, PDA derivation, account decoding, error decoding, optional FROST helpers. |
| CLI | crates/vaulkyrie-cli/src/ | Workspace CLI command groups for DKG, vaults, authority, PQC, spend orchestration, recovery, PDA, inspect, decode, and ping. |
| Solana program | programs/vaulkyrie-core/src/ | On-chain account state, instruction parser, transition rules, PDA verification, processor handlers. |
