Bitcore is a comprehensive, production-grade monorepo for building multi-blockchain wallet infrastructure and blockchain data services. It provides a full stack including core cryptographic libraries (bitcore-lib for BTC, BCH, LTC, DOGE), wallet management (bitcore-wallet-service), client SDKs (bitcore-wallet-client), a blockchain indexer and API node (bitcore-node), a CLI wallet, and a React-based block explorer (insight). The architecture is modular with each cryptocurrency having its own package, but shares significant code duplication across coin-specific libraries. The system supports UTXO-based chains (BTC, LTC, DOGE, BCH) and account-based chains (EVM, Solana, XRP), including threshold signature schemes (TSS) and multi-sig wallets. External API adapters (Alchemy, Moralis) and fiat on-ramp integrations (Wyre, Banxa, Simplex, Transak) provide production features. The codebase is written primarily in TypeScript and JavaScript, with extensive test coverage and operational scripts. While functionality is rich, technical drift is medium due to duplicated code across coin libraries, outdated dependencies (sjcl, request, Gulp), and some deprecated patterns.