Keyword-based detection for users repeatedly asking to be unblocked in chat. Fires an LLM-generated snarky redirect (with static fallback), tracks per-user nag count with escalating sass, and respects a 30-min cooldown. Configurable via config.yaml unblock_nag section. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>