Restore detailed system prompt constant framing the LLM as a sports
journalist covering an emergent bot league, with specific guidance on
ELO deltas, rivalry context, head-to-head records, and scouting-style
lineage framing. Enrich per-arc prompts with critical moment summaries
(§13.2), community tactical hints, ELO before/after deltas, and
head-to-head records. Fix rivalry arc to include ELO context for both
bots. Ensure fall arc shows both wins and losses in key match listings.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>