docs: cross-link multi-family admissibility benchmark in README

Author: ProfRandom92

README.md

@@ -135,6 +135,11 @@ Comptextv7 turns noisy context into compact operational state, then validates wh
 - **Operational drift:** `0.000000`.
 - **Interpretation:** current setup is near-lossless because the fixtures are structured; this is a useful baseline, not a universal memory claim.
 
+### Multi-Family Operational Admissibility Benchmark
+
+- **Validates:** Deterministic multi-family operational admissibility benchmark with manifest-driven fixture selection, exact scoring, reproducible JSON artifacts, and progression-regression checks.
+- **Method:** [`docs/benchmarks/multi_family_admissibility_benchmark.md`](docs/benchmarks/multi_family_admissibility_benchmark.md).
+
 ### Iterative Replay Degradation Prototype
 
 - **Validates:** how checked-in paper and agent-trace fixtures degrade across bounded repeated compact/replay cycles.