AGENTS.md (CLAUDE.md links to it): the crates and what each owns, how to
build and test fast, where each subsystem of horizon-client lives, how Game
is organised, the two single-player paths and how to test both, the vanilla
reference, and the rules that bite. docs/architecture.md: feature -> files ->
checks for the 40 areas changed most in the last 30 days.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Ludovic Marie