This specification defines loregd (Local Registry Daemon), the primary registry source for the Peios operating system. loregd implements the Registry Source Interface (RSI) defined in PSD-005, providing persistent storage for one or more registry hives using SQLite.

loregd is the first and reference source implementation. Any process implementing the RSI contract can serve as a registry source; loregd is not architecturally special. It is operationally special: it is the source that provides the Machine\ and Users\ hives at boot, making it the critical path to a running system.

This specification covers:

• The command-line interface and startup sequence
• The SQLite database schema (one database per hive)
• Volatile key storage via attached in-memory databases
• Connection pool model and concurrency
• Transaction handling and write serialisation
• Crash recovery (orphaned GUID cleanup)
• First-boot initialisation (hive root creation)
• The RSI request processing loop
• Case-insensitive storage via stored folded forms
• Shutdown and hive unload behaviour

This specification does not cover:

• LCS (the kernel subsystem) -- PSD-005
• The RSI binary protocol (wire format, message framing, op codes) -- PSD-005 §7 and §11.3
• Registry key schemas (those belong to the subsystems that own them)
• Other source implementations
• peinit's service management of loregd (PSD-007)