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

Improve conversational MVP routing

Polish MVP support experience

Ingest Core dataset and harden router policy

Polish peer helper and scope handling

Implement EmpathRAG Core hybrid router

Start V2.5 support navigator hardening