Cliff 3 (CLIFFS.md) walked readers to "use llama.cpp, vLLM is hopeless for agentic Qwen3-Next" with zero mention that LMCache is the measured mitigation for exactly that cliff (#423: 40K prefix warm-loads 0.5-2.4s L1 vs 34-43s cold). Native prefix cache / generic CPU-offload hit Cliff 3; LMCache's HMA hybrid recurrent-state caching is the differentiator. Add a bounded mitigation subsection (measured for resumed prefixes, flagged untested for growing loops), revise the recommendation to two paths, and forward-link INTERNALS' LMCache section to Cliff 3. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01EfF565T9eSLaqGzidyJ1Pm