Rewrite AGENTS.md to open with a blunt,
non-negotiable engineering bar: match the implementation to the real
complexity of the problem, DRY in the purest sense (one authoritative
representation; the trust-boundary discriminator for what is and isn't
duplication), no speculative abstraction (Rule of Three / YAGNI), no
ceremony, core logic in one cohesive home (no leaking into external
modules), WHY-only comments. Applies to all agent output — code, tests,
docs, commits, replies. Reference sections compressed; 171 -> fewer
lines, strictly more pointed.
