Module engine 

The pluggable retrieval backend.

MemoryWhale owns the MemoryEngine interface. By default it’s backed by the BuiltinEngine (the explainable scorer over a local memory set). With the off-by-default mempalace feature, MemPalaceEngine sits behind the same interface and talks to mempalace-mcp as an MCP client — so MemPalace stays an optional, swappable backend rather than a hard dependency. Callers never change.

Structs

BuiltinEngine

The default, zero-setup engine: scores an in-memory set with the explainable scorer. (A SQLite-backed variant just loads memories from the DB first.)

Traits

MemoryEngine