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/**
 * SABER post-quantum key encapsulation integration.
 *
 * <p>
 * This package wires the SABER KEM into the core layer. It provides the
 * algorithm descriptor, a runtime KEM context, a key-generation specification
 * selecting parameter variants, and encoded key specifications for import and
 * export. Provider details are encapsulated behind small factories while roles
 * and metadata remain explicit to higher layers.
 * </p>
 *
 * <h2>Scope and responsibilities</h2>
 * <ul>
 * <li>Register SABER under a canonical identifier and declare ENCAPSULATE and
 * DECAPSULATE roles, with an optional message-style agreement adapter built on
 * KEM.</li>
 * <li>Provide a {@link zeroecho.core.context.KemContext} bound to a public key
 * (encapsulation) or a private key (decapsulation).</li>
 * <li>Expose immutable key-generation specifications and defensively copying
 * encoded-key carriers with compact marshalling helpers; private-key carriers
 * are destroyable.</li>
 * <li>Validate presence of a suitable PQC provider before performing
 * operations.</li>
 * </ul>
 *
 * <h2>Components</h2>
 * <ul>
 * <li><b>SaberAlgorithm</b>: algorithm descriptor that wires KEM and, when
 * needed, a message-agreement adapter, and registers asymmetric key
 * builders.</li>
 * <li><b>SaberKemContext</b>: runtime context implementing encapsulate and
 * decapsulate using provider primitives.</li>
 * <li><b>SaberKeyGenSpec</b>: immutable selection of SABER parameter variants
 * with simple factory methods.</li>
 * <li><b>SaberPublicKeySpec</b> and <b>SaberPrivateKeySpec</b>: wrappers over
 * X.509 and PKCS#8 encodings with defensive copying and marshalling
 * helpers.</li>
 * </ul>
 *
 * <h2>Design notes</h2>
 * <ul>
 * <li>Algorithm descriptors are immutable and safe to share across
 * threads.</li>
 * <li>KEM contexts are stateful and not thread-safe; create one per
 * operation.</li>
 * <li>Key specifications preserve the provided encodings without internal
 * parsing and clone byte arrays on input and output.</li>
 * </ul>
 *
 * @since 1.0
 */
package zeroecho.core.alg.saber;
