/**
 * Structural-equivalence tests for the BRAIN memory wire-shape contracts.
 *
 * These tests pin the field shapes of the 15 types promoted from
 * `packages/core/src/memory/brain-retrieval.ts` in Phase 0e of
 * SG-ARCH-SOLID (E-CONTRACTS-FOUNDATION). Accidental narrowing or
 * widening triggers a compile-time failure during `tsc -b` in the CI gate.
 *
 * The compile-time assertions use the conditional-equality trick
 * (`Equals<A, B>`) so any structural drift produces a TS2322 or TS2344
 * at build time. The runtime `expect` smoke verifies that constructible
 * literals satisfy each interface — these are pure type contracts with
 * no runtime, so this is a thin satisfies check rather than a behavior
 * test.
 *
 * @since SG-ARCH-SOLID Saga T9831 · E-CONTRACTS-FOUNDATION T9832 · T9956 (Phase 0e)
 */
export {};
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