/**
 * ADR-121 Phase 20 — Lazy adaptive router tests.
 *
 * Covers:
 *  - Short-circuit cases: MMR signal fires → variant+hyp embeds skipped
 *  - Falls through to plain when no signal fires (all embeds used)
 *  - Cost accounting: embedsUsed / embedsEager / embedsSaved consistent
 *  - Cached vectors are populated correctly per branch
 *  - Custom thresholds propagate to the decision
 *  - End-to-end: lazy with same input as eager produces equivalent
 *    primitive choice (when both have the same features available)
 */
export {};
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