Diversity probe sweep + V1->V4 narrative README + HF Spaces entry + DV/incomplete fixes

Response quality: greeting/goodbye/meta handlers, slang routing, lexical variety, last-verified badge, markdown norm, crisis variants

V4.4 Tier 1: regex hardening, clarify-stage enum, stat caveats, PDF unicode, retry/backoff, reproducibility doc

V4.2 part 2: authority-misconduct route + conversation history in rephraser

V4.2 part 1: fix broken ISSS URL, ship URL audit + Karthik data brief

Add LLM plan-and-rephrase layer with Groq + Anthropic providers

Add stage-aware listening planner and F-1 student awareness

Improve conversational MVP routing

Polish MVP support experience

Prepare Core dataset intake and resource registry

Polish peer helper and scope handling

Implement EmpathRAG Core hybrid router